Precise Inductance of PCBTok’s PCB Inductor

PCBTok’s PCB Inductors are made of high-quality materials and components. The precision inductance of our PCB inductor is well controlled, and the tolerances are very small. Our PCB inductors are tested before they leave our factory, so you can be sure that you’re getting a product that performs as expected.

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Accurate Equilibrium Reaction of PCBTok’s PCB Inductor

The equilibrium reaction of PCBTok’s printed circuit board inductors is a direct result of their design and the way in which they are manufactured. While there are many different types of PCB inductors, PCBTok’s inductors have been designed to be as efficient as possible. This means that they have a high amount of surface area for current flow, leading to lower resistance and higher efficiency.

Additionally, because PCBTok’s inductors are made from copper-clad laminate, they have a larger amount of copper than other types of inductors. This means that there is more surface area for current flow and less resistance overall—leading to higher efficiency as well

PCBTok is a China-based PCB circuit board manufacturer that has been operating since 2012. PCBTok’s printed circuit board inductors are used in the electronics industry, aerospace industry, and other applications where high-frequency electromagnetic waves are present.

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PCB Inductor by Core Type

Air Core

Air core inductors are a type of magnetically active component that works without a magnetic core. The coil is unsupported, and there is only air inside the coil.

Iron Core

Iron core inductors are used for high-frequency applications such as switching devices. Have high saturation levels and can handle more current than other types of inductors.

Ferrite Core

It uses ferrite as a main core material which has high magnetic permeability and high electrical resistivity. Normally used with power supplier and power management applications.

Iron Powder Core

The magnetic properties of iron powder make it a good choice for many inductor applications. Iron powder cores are produced from very fine particles of iron powder.

Laminated Steel Core

Inductors that have laminated thin steel sheets, such as stacks, as the core materials. If the loop area is increased for the current to travel, the energy losses will be more.

Toroidal Core

A toroidal core is a ring-shaped form made on which an insulated coil is wire wound. It is used at low frequencies where large inductances are required.

PCB Inductor By Components (6)

  • Coupled Inductor

    A coupled inductor is an inductor with two or more windings on the same core, which takes advantage of magnetic coupling to influence the behavior of each winding on the other.

  • Wireless Charging Coils

    Wireless charging coils are a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices without plugging in.

  • Shielded Surface Mount Inductor

    Shielded surface mount inductors are a type of inductor which contain the magnetic field inside its enclosure, so that other nearby components are not affected.

  • Axial Inductors

    A type of electromagnetic component that uses a ferrite core and a wire coil to create an inductor. The coil is wrapped around the ferrite core, which is shaped like a dumbbell.

  • Multilayer Chip

    Multilayer chip inductors are used in mobile communication systems and applications that require noise suppression at high frequency and impedance matching.

  • Shielded Variable

    A type of inductor that uses electromagnetic shielding to fully encapsulate the coil in a form of magnetic shielding, minimizing losses and increasing efficiency.

PCB Inductor by Usage (5)

  • Colour Ring

    Together with a capacitor, the color ring inductance coil frequently creates a resonant and filter circuit in the circuit. The color ring inductor’s main operating principle is charging and discharging.

  • Molded

    Molded inductors are made by pressing or molding a magnetic material around a pre-wound coil and lead-frame to form the inductor. Used in office machines, household appliances and automotive application.

  • Radio-Frequency

    Radio-frequency inductors are typically made from interwound coils of wire, or by winding a single length of wire into a coil with multiple turns. Available in many different forms, including toroidal cores and ferrite cores.

  • Chokes

    Composed of a wire wound around a ferromagnetic core. This magnetic field attracts the electrons in the wire, creating a voltage difference between the end of the coil and its center.

  • Variable

    Adjustable inductors use a movable core to modify the electric field and thereby increase or decrease their inductance by blocking lines of flux. You can modify the strength of this magnetic field.

PCB Inductor Inductance and Impedance

The inductance of a PCB Inductor is a measure of how much energy it takes to change the current in the wire that makes up the coil. The higher the inductance, the more energy it takes to change the current.

The amount of inductance a PCB inductor has depends on its construction and design. Generally speaking, the larger the number of turns in a PCB inductor coil, the higher the inductance will be. For example, if you increase the number of turns in your PCB inductor from 10 to 20, you will increase its inductance by half.

Impedance is another important property when considering how much current can pass through an object. The impedance of a PCB inductor depends on its construction and design as well as its physical dimensions.

PCB Inductor Inductance and Impedance
What are PCB Inductors

What are PCB Inductors?

PCB Inductors are devices that use magnetic induction to create a magnetic field. This is done by passing current through a wire wound around an iron core (or other material). The result is a coil that can be used for many applications, including electrical filtering, timing circuits, and radio wave reception.

PCB Inductors can be made from a variety of materials, but the most common type is made using metal alloy wire wrapped around a core material. The core material is usually made of ferrite or powdered iron, which has high permeability and magnetic resistance.

Guidelines for Placing the Inductor on the PCB

The inductor is an important component in many electronic circuits. However, it is also one of the most challenging components to place on a printed circuit board. The inductor’s size, shape and location directly affect its performance.

Before placing an inductor on a PCB, consider these guidelines:

  • Place it close to ground planes. Ground planes provide a low-impedance path for current flow and help reduce electromagnetic interference from other devices on the PCB.
  • Place it away from power and signal traces. Power and signal traces generate high currents that can generate undesired magnetic fields around them that can disrupt the operation of nearby components such as inductors.
  • Place it near power supply lines so that they can provide adequate current to operate correctly under load conditions when operating at high frequencies
Guidelines for Placing the Inductor on the PCB

PCB Inductor Solution for the Digital Generation | PCBTok

PCB Inductor Solution for the Digital Generation PCBTok
PCB Inductor Solution for the Digital Generation PCBTok (1)

The Inductor is a component that generates electromagnetic fields, and it’s used in many different types of electronics, such as radios and televisions. The Inductor is made up of a set of coils, which are connected to each other. The coils are usually made out of copper wire wrapped around a core material, such as iron or ferrite. When electricity passes through the coils, it creates an electromagnetic field.

The Inductor is an important component in digital circuits because it helps to control the flow of current through electronic devices. It also helps to filter out unwanted frequencies from signals that pass through devices like radios and televisions. This filtering process is called impedance matching; it makes sure that only certain frequencies can pass through a circuit while others are blocked out by being absorbed by the inductor’s magnetic field instead!

PCB Inductor Fabrication

Varying Copper Weight of PCB Inductors (1)

The varying copper weight of PCB inductors can be used to reduce the cost of a PCB inductor. The performance of the PCB inductor depends on the weight of the copper that is used in its construction.

The weight of each unit area in a PCB inductor is directly proportional to its performance. As the weight increases, so does the performance but at some point, there will be no improvement in performance due to factors such as increased losses or reduced quality factor.

In order for a PCB inductor to be manufactured economically, it must have an acceptable level of performance while still being cost-effective. This can be done by using different weights of copper to manufacture them depending on their application.

Varying Layer Thickness of PCB Inductors

PCB inductors are a great way to reduce the size of your electronic circuit and increase its efficiency. But if you’re using them in a high-frequency circuit, you’ll want to make sure that they have the right layer thickness.

The thickness of the copper traces on your PCB will affect the inductance of your inductor and thus its performance.

For example, a thicker layer can result in more resistance and thus lower inductance.

You’ll also want to consider the number of layers used in making your PCB inductors, as well as how many turns are on each layer. The more turns there are per layer, the higher an inductor’s Q factor will be.

OEM & ODM PCB Inductor Applications

Electric Vehicles

PCB inductors are a vital component of any electric vehicle. They are used to help regulate current and voltage, which is essential for the proper functioning of electric motors. Without this regulation, an electric motor would overheat and fail.

Wireless Charger

PCB inductors for wireless charger are used to control the power flow and to protect the system from high voltage. They are also used for frequency conversion. In some cases, they may be used for matching impedance.

Flyback Converter

Flyback converters are often used in high-power applications such as power supplies and variable-frequency drives. They use an inductor with a ferrite core to store energy that is then released when the current needs to be reduced.

Wireless LANs

The inductor is a passive component that is used in many electronic circuits. It can be used as an antenna, or it can help to amplify signals. Inductors are also often used in wireless LANs because they can help to reduce interference from other devices.

Small Wearable Application

PCB inductors are a critical component in small wearable devices, because they help to minimize the amount of power that is wasted on heating. They also allow for more compact designs, which is vital in these applications.

Top-of-the-Line PCB Inductors – PCBTok
Top-of-the-Line PCB Inductors – PCBTok

PCBTok is one of the leading manufacturers of inductors. We offer the most comprehensive selection of inductors on the market, with a wide range of options for your unique needs.

Inquire about PCB Inductors from PCBTok today!

PCB Inductor Production Details As Following Up

NO Item Technical Specification
Standard Advanced
1 Layer Count 1-20 layers 22-40 layer
2 Base Material KB、Shengyi、ShengyiSF305、FR408、FR408HR、IS410、FR406、GETEK、370HR、IT180A、Rogers4350、Rogers400、PTFE Laminates(Rogers series、Taconic series、Arlon series、Nelco series)、Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
3 PCB Type Rigid PCB/FPC/Flex-Rigid Backplane、HDI、High multi-layer blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
4 Lamination type Blind&buried via type Mechanical blind&burried vias with less than 3 times laminating Mechanical blind&burried vias with less than 2 times laminating
HDI PCB 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating
5 Finished Board Thickness 0.2-3.2mm 3.4-7mm
6 Minimum Core Thickness 0.15mm(6mil) 0.1mm(4mil)
7 Copper Thickness Min. 1/2 OZ, Max. 4 OZ Min. 1/3 OZ, Max. 10 OZ
8 PTH Wall 20um(0.8mil) 25um(1mil)
9 Maximum Board Size 500*600mm(19”*23”) 1100*500mm(43”*19”)
10 Hole Min laser drilling size 4mil 4mil
Max laser drilling size 6mil 6mil
Max aspect ratio for Hole plate 10:1(hole diameter>8mil) 20:1
Max aspect ratio for laser via filling plating 0.9:1(Depth included copper thickness) 1:1(Depth included copper thickness)
Max aspect ratio for mechanical depth-
control drilling board(Blind hole drilling depth/blind hole size)
0.8:1(drilling tool size≥10mil) 1.3:1(drilling tool size≤8mil),1.15:1(drilling tool size≥10mil)
Min. depth of Mechanical depth-control(back drill) 8mil 8mil
Min gap between hole wall and
conductor (None blind and buried via PCB)
7mil(≤8L),9mil(10-14L),10mil(>14L) 5.5mil(≤8L),6.5mil(10-14L),7mil(>14L)
Min gap between hole wall conductor (Blind and buried via PCB) 8mil(1 times laminating),10mil(2 times laminating), 12mil(3 times laminating) 7mil(1 time laminating), 8mil(2 times laminating), 9mil(3 times laminating)
Min gab between hole wall conductor(Laser blind hole buried via PCB) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2)
Min space between laser holes and conductor 6mil 5mil
Min space between hole walls in different net 10mil 10mil
Min space between hole walls in the same net 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB) 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB)
Min space bwteen NPTH hole walls 8mil 8mil
Hole location tolerance ±2mil ±2mil
NPTH tolerance ±2mil ±2mil
Pressfit holes tolerance ±2mil ±2mil
Countersink depth tolerance ±6mil ±6mil
Countersink hole size tolerance ±6mil ±6mil
11 Pad(ring) Min Pad size for laser drillings 10mil(for 4mil laser via),11mil(for 5mil laser via) 10mil(for 4mil laser via),11mil(for 5mil laser via)
Min Pad size for mechanical drillings 16mil(8mil drillings) 16mil(8mil drillings)
Min BGA pad size HASL:10mil, LF HASL:12mil, other surface technics are 10mil(7mil is ok for flash gold) HASL:10mil, LF HASL:12mil, other surface technics are 7mi
Pad size tolerance(BGA) ±1.5mil(pad size≤10mil);±15%(pad size>10mil) ±1.2mil(pad size≤12mil);±10%(pad size≥12mil)
12 Width/Space Internal Layer 1/2OZ:3/3mil 1/2OZ:3/3mil
1OZ: 3/4mil 1OZ: 3/4mil
2OZ: 4/5.5mil 2OZ: 4/5mil
3OZ: 5/8mil 3OZ: 5/8mil
4OZ: 6/11mil 4OZ: 6/11mil
5OZ: 7/14mil 5OZ: 7/13.5mil
6OZ: 8/16mil 6OZ: 8/15mil
7OZ: 9/19mil 7OZ: 9/18mil
8OZ: 10/22mil 8OZ: 10/21mil
9OZ: 11/25mil 9OZ: 11/24mil
10OZ: 12/28mil 10OZ: 12/27mil
External Layer 1/3OZ:3.5/4mil 1/3OZ:3/3mil
1/2OZ:3.9/4.5mil 1/2OZ:3.5/3.5mil
1OZ: 4.8/5mil 1OZ: 4.5/5mil
1.43OZ(positive):4.5/7 1.43OZ(positive):4.5/6
1.43OZ(negative ):5/8 1.43OZ(negative ):5/7
2OZ: 6/8mil 2OZ: 6/7mil
3OZ: 6/12mil 3OZ: 6/10mil
4OZ: 7.5/15mil 4OZ: 7.5/13mil
5OZ: 9/18mil 5OZ: 9/16mil
6OZ: 10/21mil 6OZ: 10/19mil
7OZ: 11/25mil 7OZ: 11/22mil
8OZ: 12/29mil 8OZ: 12/26mil
9OZ: 13/33mil 9OZ: 13/30mil
10OZ: 14/38mil 10OZ: 14/35mil
13 Dimension Tolerance Hole Position 0.08 ( 3 mils)
Conductor Width(W) 20% Deviation of Master
1mil Deviation of Master
Outline Dimension 0.15 mm ( 6 mils) 0.10 mm ( 4 mils)
Conductors & Outline
( C – O )
0.15 mm ( 6 mils) 0.13 mm ( 5 mils)
Warp and Twist 0.75% 0.50%
14 Solder Mask Max drilling tool size for via filled with Soldermask (single side) 35.4mil 35.4mil
Soldermask color Green, Black, Blue, Red, White, Yellow,Purple matte/glossy
Silkscreen color White, Black,Blue,Yellow
Max hole size for via filled with Blue glue aluminium 197mil 197mil
Finish hole size for via filled with resin  4-25.4mil  4-25.4mil
Max aspect ratio for via filled with resin board 8:1 12:1
Min width of soldermask bridge Base copper≤0.5 oz、Immersion Tin: 7.5mil(Black), 5.5mil(Other color) , 8mil( on copper area)
Base copper≤0.5 oz、Finish treatment not Immersion Tin : 5.5 mil(Black,extremity 5mil), 4mil(Other
color,extremity 3.5mil) , 8mil( on copper area
Base coppe 1 oz: 4mil(Green), 5mil(Other color) , 5.5mil(Black,extremity 5mil),8mil( on copper area)
Base copper 1.43 oz: 4mil(Green), 5.5mil(Other color) , 6mil(Black), 8mil( on copper area)
Base copper 2 oz-4 oz: 6mil, 8mil( on copper area)
15 Surface Treatment Lead free Flash gold(electroplated gold)、ENIG、Hard gold、Flash gold、HASL Lead free、OSP、ENEPIG、Soft gold、Immersion silver、Immersion Tin、ENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finge
Leaded Leaded HASL
Aspect ratio 10:1(HASL Lead free、HASL Lead、ENIG、Immersion Tin、Immersion silver、ENEPIG);8:1(OSP)
Max finished size HASL Lead 22″*39″;HASL Lead free 22″*24″;Flash gold 24″*24″;Hard gold 24″*28″;ENIG 21″*27″;Flash gold(electroplated gold) 21″*48″;Immersion Tin 16″*21″;Immersion silver 16″*18″;OSP 24″*40″;
Min finished size HASL Lead 5″*6″;HASL Lead free 10″*10″;Flash gold 12″*16″;Hard gold 3″*3″;Flash gold(electroplated gold) 8″*10″;Immersion Tin 2″*4″;Immersion silver 2″*4″;OSP 2″*2″;
PCB thickness HASL Lead 0.6-4.0mm;HASL Lead free 0.6-4.0mm;Flash gold 1.0-3.2mm;Hard gold 0.1-5.0mm;ENIG 0.2-7.0mm;Flash gold(electroplated gold) 0.15-5.0mm;Immersion Tin 0.4-5.0mm;Immersion silver 0.4-5.0mm;OSP 0.2-6.0mm
Max high to gold finger 1.5inch
Min space between gold fingers 6mil
Min block space to gold fingers 7.5mil
16 V-Cutting Panel Size 500mm X 622 mm  ( max. ) 500mm X 800 mm ( max. )
Board Thickness 0.50 mm (20mil) min. 0.30 mm (12mil) min.
Remain Thickness 1/3 board thickness 0.40 +/-0.10mm( 16+/-4 mil )
Tolerance ±0.13 mm(5mil) ±0.1 mm(4mil)
Groove Width 0.50 mm (20mil) max. 0.38 mm (15mil) max.
Groove to Groove 20 mm (787mil) min. 10 mm (394mil) min.
Groove to Trace 0.45 mm(18mil) min. 0.38 mm(15mil) min.
17 Slot Slot size tol.L≥2W PTH Slot: L:+/-0.13(5mil) W:+/-0.08(3mil) PTH Slot: L:+/-0.10(4mil) W:+/-0.05(2mil)
NPTH slot(mm) L+/-0.10 (4mil) W:+/-0.05(2mil) NPTH slot(mm) L:+/-0.08 (3mil) W:+/-0.05(2mil)
18 Min Spacing from hole edge to hole edge 0.30-1.60 (Hole Diameter) 0.15mm(6mil) 0.10mm(4mil)
1.61-6.50 (Hole Diameter) 0.15mm(6mil) 0.13mm(5mil)
19 Min spacing between hole edge to circuitry pattern PTH hole: 0.20mm(8mil) PTH hole: 0.13mm(5mil)
NPTH hole: 0.18mm(7mil) NPTH hole: 0.10mm(4mil)
20 Image transfer Registration tol Circuit pattern vs.index hole 0.10(4mil) 0.08(3mil)
Circuit pattern vs.2nd drill hole 0.15(6mil) 0.10(4mil)
21 Registration tolerance of front/back image 0.075mm(3mil) 0.05mm(2mil)
22 Multilayers Layer-layer misregistration 4layers: 0.15mm(6mil)max. 4layers: 0.10mm(4mil) max.
6layers: 0.20mm(8mil)max. 6layers: 0.13mm(5mil) max.
8layers: 0.25mm(10mil)max. 8layers: 0.15mm(6mil) max.
Min. Spacing from Hole Edge to Innerlayer Pattern 0.225mm(9mil) 0.15mm(6mil)
Min.Spacing from Outline to Innerlayer Pattern 0.38mm(15mil) 0.225mm(9mil)
Min. board thickness 4layers:0.30mm(12mil) 4layers:0.20mm(8mil)
6layers:0.60mm(24mil) 6layers:0.50mm(20mil)
8layers:1.0mm(40mil) 8layers:0.75mm(30mil)
Board thickness tolerance 4layers:+/-0.13mm(5mil) 4layers:+/-0.10mm(4mil)
6layers:+/-0.15mm(6mil) 6layers:+/-0.13mm(5mil)
8-12 layers:+/-0.20mm (8mil) 8-12 layers:+/-0.15mm (6mil)
23 Insulation Resistance 10KΩ~20MΩ(typical:5MΩ)
24 Conductivity <50Ω(typical:25Ω)
25 Test voltage 250V
26 Impedance control ±5ohm(<50ohm), ±10%(≥50ohm)

PCBTok offers flexible shipping methods for our customers, you may choose from one of the methods below.

1. DHL

DHL offers international express services in over 220 countries.
DHL partners with PCBTok and offers very competitive rates to customers of PCBTok.
It normally takes 3-7 business days for the package to be delivered around the world.


2. UPS

UPS gets the facts and figures about the world’s largest package delivery company and one of the leading global providers of specialized transportation and logistics services.
It normally takes 3-7 business days to deliver a package to most of the addresses in the world.


3. TNT

TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
of our customers.


4. FedEx

FedEx offers delivery solutions for customers around the world.
It takes 4-7 business days to deliver the packages to the hands
of our customers.


5. Air, Sea/Air, and Sea

If your order is of large volume with PCBTok, you can also choose
to ship via air, sea/air combined, and sea when necessary.
Please contact your sales representative for shipping solutions.

Note: if you need others, please contact your sales representative for shipping solutions.

You can use the following payment methods:

Telegraphic Transfer(TT): A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions. It’s very convenient to transfer.

Bank/Wire transfer: To pay by wire transfer using your bank account, you need to visit your nearest bank branch with the wire transfer information. Your payment will be completed 3-5 business days after you have finished the money transfer.

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Credit Card: You can pay with a credit card: Visa, Visa Electron, MasterCard, Maestro.

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  • “We’ve been using PCBTok to make a bunch of PCBs, and they’re so good. I love that you can design and order right on their website, without having to upload files. We have an account manager assigned to us, and they have been super helpful every time we’ve needed anything. The boards we ordered arrived really fast and the quality is great! It was also easy to order our solder masks and silkscreen. If you need some PCBs made, check out PCBTok

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  • “PCBTok is a reliable and efficient company to use for your PCB needs. I have used other companies in the past but they were extremely slow and their quality was terrible. PCBtok is always on time and the quality is amazing! Their prices are also very reasonable. I will continue to use PCBtok for all my future PCB needs!”

    Clydette Overturf, Design Engineer from Australia
  • “I have been using for a few years now and I can’t say enough good things about this company, especially their customer service. The quality of the boards is always top notch and delivery time is within what we require. This is a great company to do business with, and I look forward to many more years of ordering from PCBTok”

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