13 best inductors

Inductors are passive electrical components used in electronic circuits and systems for various purposes, primarily related to the manipulation of electrical currents and voltages. They are commonly associated with power transmission products and industrial applications. Here's what you need to know about inductors:

  1. Basic Function:

    • An inductor is a coil of wire typically wound around a core made of a magnetic material, such as iron or ferrite.
    • Its fundamental function is to store electrical energy in the form of a magnetic field when current flows through it. This magnetic field opposes any change in current, in accordance with Faraday's law of electromagnetic induction.

  2. Symbol and Notation:

    • In circuit diagrams, inductors are represented by a symbol that resembles a coil of wire.The notation typically includes a symbol followed by a value in henrys (H), which is the unit of inductance.

  3. Inductance:

    • Inductance (L) is a property of inductors that quantifies their ability to store energy in a magnetic field. It is measured in henrys (H).
    • Larger inductors generally have higher inductance values and can store more energy.

  4. Behavior in Circuits:

    • Inductors resist changes in current. When voltage is applied across an inductor, it initially resists the flow of current and then allows it to increase gradually. Conversely, when voltage is removed or decreased, the inductor resists the decrease in current.
    • Inductors are often used to filter out high-frequency noise in circuits because they allow low-frequency signals to pass through while impeding the flow of high-frequency signals.

  5. Applications:

    • Inductors have various applications in electronics and power transmission:
      • Filtering: They are used in power supplies and audio systems to filter out unwanted noise or ripples in voltage.
      • Energy Storage: Inductors can store energy and release it when needed, such as in transformer cores.
      • Inductive Loads: Devices like motors and solenoids rely on inductors to function.
      • Coupling: Inductors are used in transformers to transfer electrical energy from one coil to another, often at different voltage levels.
      • Oscillators: They play a role in the frequency-determining components of some oscillators and resonant circuits.

  6. Types of Inductors:

    • There are various types of inductors, including air-core inductors, iron-core inductors, and toroidal inductors. Each type is designed for specific applications and offers different properties.

  7. Inductor Characteristics:

    • The characteristics of an inductor can be described by factors such as inductance value, resistance (due to wire resistance and core losses), and self-resonant frequency (the frequency at which the inductor becomes capacitive).

  8. Inductance Calculation:

    • The inductance of an inductor is influenced by factors like the number of turns in the coil, the coil's dimensions, the core material, and the core's shape. Various formulas and calculators are available for determining inductance values.

In summary, inductors are essential components in electronics and power transmission systems, serving various functions such as energy storage, filtering, and impedance matching. They play a crucial role in controlling the flow of electrical current and voltage in circuits and are found in a wide range of industrial and scientific applications.

Below you can find our editor's choice of the best inductors on the market
  

200 pcs Inductor Large Assortment 20 Values 1uH to 4.7mH 1/2w 0.5w

3pdt

Based on 75 reviews Check latest price

Product description

0.5 Watt, 20 values, each value comes 10 times:



10 * 1 uH (DC Current Max: 920mA)

10 * 2.2 uH (DC Current Max: 750mA)

10 * 3.3 uH (DC Current Max: 670mA)

10 * 4.7 uH (DC Current Max: 620mA)

10 * 6.8 uH (DC Current Max: 550mA)

10 * 10 uH (DC Current Max: 500mA)

10 * 15 uH (DC Current Max: 460mA)

10 * 22 uH (DC Current Max: 410mA)

10 * 33 uH (DC Current Max: 370mA)

10 * 47 uH (DC Current Max: 340mA)

10 * 100 uH (DC Current Max: 275mA)

10 * 150 uH (DC Current Max: 175mA)

10 * 220 uH (DC Current Max: 155mA)

10 * 330 uH (DC Current Max: 137mA)

10 * 470 uH (DC Current Max: 126mA)

10 * 680 uH (DC Current Max: 113mA)

10 * 1 mH (DC Current Max: 100mA)

10 * 2.2 mH (DC Current Max: 75mA)

10 * 3.3 mH (DC Current Max: 65mA)

10 * 4.7 mH (DC Current Max: 40mA)



Tolerance: +/- 10%

Size: body length 10.5mm, body diameter 4mm, wire diameter 0.6mm

  • Huge Inductor Assortment
  • 200 pcs and 20 values
  • rated 0.5 Watt
  • 1 uH - 4.7 mH
  • DIP through whole components

User questions & answers

Question: What is the saturation current of these inductors
Answer: Rated DC Current (mA) Max.: 1uH 920mA, 2.2uH 750mA, 3.3uH 670mA, 4.7uH 620mA, 6.8uH 550mA, 10uH 500mA, 15uH 460mA, 22uH 410mA, 33uH 370mA, 47uH 340mA, 100uH 275mA, 150uH 175mA, 220uH 155mA, 330uH 137mA, 470uH 126mA, 680uH 113mA, 1mH 100mA, 2.2mH 75mA, 3.3mH 65mA, 4.7mH 40mA

BOJACK 15 Values 160 Pcs Inductor 10 uH to 20 mH DIP Radial Power Choke Inductors Assortment Kit

BOJACK

Based on 4 reviews Check latest price

Product description

BOJACK high quality 15 Values 160 Pcs Inductor DIP Radial Power

Choke Inductors Assortment Kit



Operation temperature: -20~80℃

Package Quantity: 160 pcs



4*6 mm:

10 uH----------Blue----------20 Pcs

100 uH--------Black--------20 Pcs

220 uH--------Black--------20 Pcs



6*8 mm:

1 uH------------Black----------10 Pcs

4.7 uH---------Black----------10 Pcs

15 uH----------Black----------10 Pcs

33 uH----------Black----------10 Pcs

150 uH--------Black----------10 Pcs

1 mH-----------Black----------10 Pcs

2.7 mH--------Black----------5 Pcs

10 mH---------Black----------5 Pcs

20 mH---------Black----------5 Pcs



8* 10mm:

10 uH----------Black----------10 Pcs

1 mH-----------Black----------10 Pcs



10*16mm:

10 mH---------Black----------5 Pcs



Used in televisions, audio equipment, telecommunication devices, etc.

  • Small vertical inductors occupy less space.
  • The inductor coil is protected with PVC or UL tube to ensure stable performance
  • This choke inductor has special guide pin structure; Not easy to produce open circuit phenomenon
  • The choke coil inductors are of small distributed capacitance and high self-resonance frequency
  • Include：10uh, 1uh, 33uh, 2.7mh, 100uh, 4.7uh, 150uh, 10mh, 1mh, 220uh, 15uh, 20mh 15model, Packed in A plastic storage case

BOJACK 20 Values 200 Pcs Inductor 1 uH to 4.7 mH 0.5 W Color Ring Inductor 1/2 Watt Assortment Kit

BOJACK

Based on 40 reviews Check latest price

Product description

BOJACK High Quality Inductor Assortment Kit

Inductor Power:1/2 W

Inductance tolerance：10%

Package Quantity: 200 pcs (Each model 10 pcs)



1 uH x 10 Pcs

2.2 uH x 10 Pcs

3.3 uH x 10 Pcs

4.7 uH x 10 Pcs

6.8 uH x 10 Pcs



10 uH x 10 Pcs

15 uH x 10 Pcs

22 uH x 10 Pcs

33 uH x 10 Pcs

47 uH x 10 Pcs



100 uH x 10 Pcs

150 uH x 10 Pcs

220 uH x 10 Pcs

330 uH x 10 Pcs

470 uH x 10 Pcs

680 uH x 10 Pcs



1 mH x 10 Pcs

2.2 mH x 10 Pcs

3.3 mH x 10 Pcs

4.7 mH x 10 Pcs

  • BOJACK High Quality Inductor Assortment Kit
  • Inductor Power:1/2 W
  • Inductance tolerance：10%
  • Model:20 type-(1uH,2.2uH,3.3uH,4.7uH,6.8uH,10uH,15uH,22uH,33uH,47uH,100uH,150uH,220uH,330uH,470uH,680uH,1mH,2.2mH,3.3mH,4.7mH)
  • Package Quantity: 200 pcs (Each model 10 pcs), Packed in A plastic storage case

BOJACK 20 Values 200 Pcs Inductor 10 uH to 10 mH 1 W Color Ring Inductor 1 Watt Assortment Kit

BOJACK

Based on 4 reviews Check latest price

Product description

BOJACK High Quality Inductor Assortment Kit

Inductor Power:1 W

Inductance tolerance：10%

Package Quantity: 200 pcs (Each model 10 pcs)



10 uH x 10 Pcs

15 uH x 10 Pcs

22 uH x 10 Pcs

33 uH x 10 Pcs

47 uH x 10 Pcs



68 uH x 10 Pcs

100 uH x 10 Pcs

220 uH x 10 Pcs

330 uH x 10 Pcs

470 uH x 10 Pcs



390 uH x 10 Pcs

560 uH x 10 Pcs

680 uH x 10 Pcs

1 mH x 10 Pcs

1.5 mH x 10 Pcs

2.2 mH x 10 Pcs



3.3 mH x 10 Pcs

6.8 mH x 10 Pcs

4.7 mH x 10 Pcs

10 mH x 10 Pcs



The main function of inductors is to block current, tune and select frequency, filter signals, filter noise,

stabilize current and suppress electromagnetic interference, etc.

  • BOJACK High Quality Inductor Assortment Kit
  • Inductor Power:1 W
  • Inductance tolerance：10%
  • Model:20 type-(10uH,15uH,22uH,33uH,47uH,68uH,100uH,220uH,330uH,470uH,390uH,560uH,680uH,1mH,1.5mH,2.2mH,3.3mH,6.8mH,4.7mH,10mH)
  • Package Quantity: 200 pcs (Each model 10 pcs), Packed in A plastic storage case

DIYhz 20 Pcs Toroid Core Inductor Copper Wire Wind Wound 100uH 6A Coil for LM2596-100uH

Based on 19 reviews Check latest price

Product description

20 Pcs - Toroid Core Inductor Copper Wire Wind Wound 100uH 6A Coil for LM2596

Feature:

- This is a toroid ferrite core inductor with 13mm outer diameter, 5mm width and 0.5 wire diameter.

- The toroid Core inductor has small working frequency impedance,high magnetic permeability small magnetic-leakage loss widely used in power switch,power cable or signal cable.

Product Specification

* Type:Toroid Core Inductor.

* Outer Diameter: 13mm, Width: 5mm, Wire Diameter: 0.5mm.

* Inductance: 100uH, Current: 3A, Resistance: 35mΩ, Package Quantity: 20 Pcs.

* Application: switching power supply noise suppression filter, power cable and signal cable ESD filter.

Package Include:

20 x Toroid Core Inductor

  • This is a toroid ferrite core inductor with 13mm outer diameter, 5mm width and 0.5 wire diameter.
  • Widely used in power switch, power cable or signal cable, noise suppression filter, power cable and signal cable ESD filter.
  • The toroid Core inductor has less working frequency impedance, high magnetic permeability, less magnetic-leakage loss.
  • Specification of Toroid Core Inductor: Inductance: 100uH, Current: 6A, Resistance: 35mΩ.
  • Package Include: 20 x Toroid Core Inductor.

150 pcs Inductor Large Assortment 15 Values 10uH to 4.7mH, 1W, 1 watt

3pdt

Based on 19 reviews Check latest price

Product description

1 Watt, 15 values, each value comes 10 times:



10 * 10 uH

10 * 15 uH

10 * 22 uH

10 * 33 uH

10 * 47 uH

10 * 68 uH

10 * 100 uH

10 * 220 uH

10 * 330 uH

10 * 470 uH

10 * 680 uH

10 * 1 mH

10 * 1.5 mH

10 * 2.2 mH

10 * 4.7 mH

  • Huge 1w Inductor Assortment
  • 150 pcs and 15 values
  • rated 1 watt
  • 10 uH - 4.7 mH
  • DIP through-whole components

User questions & answers

Question: do they have a rated current
Answer: The rated current range from 0.10uH ~ 1.0uH is 900mA ~ 100mA

Yoming 20Values 200 Pcs Inductor 1 uH to 4.7 mH 0.5 W Color Ring Inductor 1/2 Watt Assortment Kit for Audio,Toys,Tuner modules etc

Yowming

Based on 1 reviews Check latest price

Product description

High Quality Color Code Inductor Assortment Kit

Inductor Power:1/2 W

Inductance tolerance：K10%

Package Quantity: 



1 uH-------------------10 Pcs

2.2 uH-------------------10 Pcs

3.3 uH-------------------10 Pcs

4.7 uH-------------------10 Pcs

6.8 uH-------------------10 Pcs



10 uH-------------------10 Pcs

15 uH-------------------10 Pcs

22 uH-------------------10 Pcs

33 uH-------------------10 Pcs

47 uH-------------------10 Pcs



100 uH------------------10 Pcs

150 uH------------------10 Pcs

220 uH------------------10 Pcs

330 uH------------------10 Pcs

470 uH------------------10 Pcs

680 uH------------------10 Pcs



1 mH------------------10 Pcs

2.2 mH------------------10 Pcs

3.3 mH------------------10 Pcs

4.7 mH------------------10 Pcs

  • Inductor Power:1/2 W / Inductance tolerance：10% / Model:20
  • 2.Iron core material, high Q value and self-resonant frequency. The outer layer is treated with epoxy resin for high reliability. Large inductance range and automatic plug-in
  • 3.Color ring inductors are generally used for circuit matching and signal quality control.General connection and power connection are also a kind of energy storage element.
  • stable current, accurate error, long service life,The color ring inductor has a solid structure and low cost, suitable for automated production
  • Package Quantity: 200 pcs (Each model 10 pcs), Packed in A plastic storage case. / type-(1uH,2.2uH,3.3uH,4.7uH,6.8uH,10uH,15uH,22uH,33uH,47uH,100uH,150uH,220uH,330uH,470uH,680uH,1mH,2.2mH,3.3mH,4.7mH)

Inductor Assortment Kit, 145Pcs 10uH-10mH 12 Values Choke Inductors Assorted Kit

Walfront

Based on 24 reviews Check latest price

Product description

Specifications:

Quantity: 145pcs

Working temperature: 20-80℃

Weight: Approx. 192g  

10uh: size(DxL): 4*6mm, color: blue, Quantity:20

100uh: size(DxL): 4*6mm, color: black, Quantity:20

220uh: size(DxL): 4*6mm, color: blue, Quantity:20

10uh: size(DxL): 8*10mm, color: black, Quantity:10

1uh: size(DxL): 6*8mm, color: black, Quantity:10

4.7uh: size(DxL): 6*8mm, color: black, Quantity:10

15uh: size(DxL): 6*8mm, color: black, Quantity:10

1mh: size(DxL): 8*10mm, color: black, Quantity:10

33uh: size(DxL): 6*8mm, color: black, Quantity:10

150uh: size(DxL): 6*8mm, color: black, Quantity:10

1000uh: size(DxL): 6*8mm, color: black, Quantity:10

10mh: size(DxL): 10*16mm, color: black, Quantity:5



Package Includes:

145 x Inductors

  • 1. Small vertical inductors occupy less space.
  • 2. Small distributed capacitance and high self-resonance frequency.
  • 3. With special guide pin structure, not easy to produce open circuit phenomenon.
  • 4. Protected with PVC or UL tube.
  • 5. 145 pieces of inductors in 12 values can meet your general needs.

User questions & answers

Question: Does each part have a label of what value it is
Answer: There is no included label or datasheet. Parts contain no identifying markings.
Question: What are the component values? There are no markings on the inductors or the case the came in
Answer: I checked them and the values listed are in the order they are in the box from top left to bottom right. So top row was : 10µH, 100µH, 220µH, 10µH Second row was: 1µH, 4.7µH, 15µH, 1mH/1kµH Third row was: 33µH, 150µH, 1mH/1kµH, 10mH/10kµH The third row is out of order on mine, so be sure to check the values of the parts before you use them (which is always a good practice anyway).

Product features

Guide Pin Structure

The inductor set is made of high quality meterial, has special guide pin structure, not easy to produce open circuit phenomenon, with small size, the small vertical inductors occupy less space.

Good Performance

The inductor coil assortment kit can protect with PVC or UL tube, the choke inductor kit has small distributed capacitance and high self-resonance frequency.

Size:

10uh: size(DxL): 4*6mm, color: blue, Quantity:20

100uh: size(DxL): 4*6mm, color: black, Quantity:20

220uh: size(DxL): 4*6mm, color: blue, Quantity:20

10uh: size(DxL): 8*10mm, color: black, Quantity:10

1uh: size(DxL): 6*8mm, color: black, Quantity:10

4.7uh: size(DxL): 6*8mm, color: black, Quantity:10

Haobase 25Value 250pcs DIP Inductor Assorted Kit 25 value 1uH to 1mH 0.25W

Haobase

Based on 36 reviews Check latest price

Product description

1/4W inductor kit: 1uH 10uH 100uH 2.2uH 22uH 220uH 3.3uH 33uH 330uH 4.7uH 47uH 470uH 5.6uH 56uH 560uH 6.8uH 68uH 680uH 8.2uH 82uH 820uH 1mH

Cofufu 0307 DIP Inductor Assorted Kit 22 value total 220pcs 1uH to 1mH 0.25W

beesclover

Based on 76 reviews Check latest price

Product description

1/4W 0307 10% DIP Inductor Assorted Kit 28 value total 280pcs 1uH to 1mH : 1uH 10uH 100uH 1.5uH 15uH 150uH 2.2uH 22uH 220uH 3.3uH 33uH 330uH 3.9uH 39uH 390uH 4.7uH 47uH 470uH 5.6uH 56uH 560uH 6.8uH 68uH 680uH 8.2uH 82uH 820uH 1mH



Please be assured, the inductors kit have a 12 Months Warranty. Please contact us directly from Your Account (http://www.amazon.com/your-account). Locate the order and click the "Problem with this order?" button; then select the "Contact Seller" button to send an e-mail message to us.

User questions & answers

Question: What is the maximum current rating (not wattage) and who is the manufacturer
Answer: Cofufu is the manufacturer. For the 330 uH I got 311 uH ESR 5.4 Ohm at 100Hz 303 uH ESR 5.4 Ohm 120 Hz 311 uH ESR 5.5 Ohm at 1kHz 290 uH ESR 6.62 Ohm at 10 kHz and 271 uH ESR 8.85 Ohm at 100kHz so depending on the frequency it goes from .25 W = I^2 * R -> .25/5.4 = I^2 = 4.629E-2 I = .215 A at 100Hz to .168 A at 100kHz. For the 1mH .127 A - .090 A for the 1 uH 1.29 A for all freq. So I guess as you go from lower to higher inductance you are able to use less current by a factor of ten. Hope that helps. Of course the inductive reactance doesn't actually dissipate any current as heat, just the equiv series resistance which appears to be a function of the inductance and a little bit of frequency
Question: Are these micro h or mill h? i just received a batch an everything is marked wrong wat i received was mh not uh
Answer: 1 mH = 1000 uH. The batch I received were all correct. I think it's just an issue of not printing the "micro" prefix correctly, so they used an m for whatever reason. Also, needless to say, if they were indeed millihenries, they would be much larger :-) I can't speak to your particular batch, but mine were all correct even though they were confusingly marked.
Question: The title says "22 value total 220pcs", the picture says "28 value total 280pcs". Which one is correct
Answer: Now 28 value total 280pcs
Question: what is the tolerance
Answer: 10%

HUAREW 20 Values 200 Pcs Inductor AL0410 1 uH - 4.7 mH 1/2 W in-line DIP Color Code Inductor Assortment Kit

HUAREW

Based on 2 reviews Check latest price

Product description

HUAREW High Quality Color Code Inductor Assortment Kit

Inductor Power:1/2 W

Inductance tolerance：K10%

Package Quantity:



1 uH-------------------10 Pcs

2.2 uH-------------------10 Pcs

3.3 uH-------------------10 Pcs

4.7 uH-------------------10 Pcs

6.8 uH-------------------10 Pcs



10 uH-------------------10 Pcs

15 uH-------------------10 Pcs

22 uH-------------------10 Pcs

33 uH-------------------10 Pcs

47 uH-------------------10 Pcs



100 uH------------------10 Pcs

150 uH------------------10 Pcs

220 uH------------------10 Pcs

330 uH------------------10 Pcs

470 uH------------------10 Pcs

680 uH------------------10 Pcs



1 mH------------------10 Pcs

2.2 mH------------------10 Pcs

3.3 mH------------------10 Pcs

4.7 mH------------------10 Pcs

  • ▲HUAREW High Quality Color Code Inductor Assortment Kit
  • ▲Inductor Power:1/2 W
  • ▲Tolerance：K10%
  • ▲Model:20 Type-(1uH,2.2uH,3.3uH,4.7uH,6.8uH,10uH,15uH,22uH,33uH,47uH,100uH,150uH,220uH,330uH,470uH,680uH,1mH,2.2mH,3.3mH,4.7mH)
  • ▲Package Quantity: 200 Pcs (Each model 10 Pcs)

uxcell a13070600ux0394 10 Piece 2 Leads 100uH 8x10 8 mm x 10 mm Radial Leaded Power Inductors

uxcell

Based on 12 reviews Check latest price

Product description

Leaded inductor with ferrite core high-current leaded inductor. High-reliability leaded inductor low-resistance leaded inductor. Axial leaded power inductor radial leaded power inductor ul-polyolefin shrinking tubing leaded inductor.

  • Product Name : Inductor;Material : UL-polyolefin, Metal
  • Inductance : 100uH;Body Size : 8 x 10mm / 0.21" x 0.39"(D*H)
  • Lead Diameter : 0.5mm / 0.196";Pitch : 5mm/ 0.2"
  • Color : Black, Silver Tone;Weight : 25g
  • Package Content : 10 x Inductors

BNTECHGO 28 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0122" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors

bntechgo.com

Based on 1 reviews Check latest price

Product description

BNTECHGO 28 Gauge Enameled Magnet Wire is made of high quality copper and good coating with enamel.Perfect enameled magnet wire for implementing into your science projects/experiments or personal DIY,used by engineers and hobbyists alike!

Product Details

Size: 4 oz（527 feet）

Color: Red

Diameter: 0.0122 inches(0.31mm)

Tolerance: +/-0.05mm

Item Weight: 1 item for 4 ounces

Gauge: 28AWG

Specification Met: NEMA(NEMA Description: MW-80-C)

Insulation type: Solder able Polyurethane Overcoat

Build: Single Min-Nom

Maximum Resistance At 20℃ Ω/km:222.8

  • High Quality enameled Copper Wire!Durable and not break while winding the coils.Highly Efficient!
  • Magnet wire is copper wire that coated with a thin layer of insulated enamel.This 28AWG magnet wire is 4 ounces(527 feet).The copper strands conducts,the insulation is made from modified Polyester with a Polyamideimide overcoat,and protects the coiled wire from short-circuiting.
  • This varnished copper wire is constructed with premium enamel insulation.Temperature rating 155°C (311°F) makes it suitable for several thermal overload applications.Raw copper is drawn to meet specific size requirements based on NEMA MW-35-C standard.
  • 28 gauge enameled magnet wire: Wrapped in spool and color is red.Outside diameter 0.0122"for perfect thickness.
  • BNTECHGO magnetic copper wire is widely used in the construction of transformers,wound coils,motors,solenoids,instruments,inductors,speakers,electromagnets,and other applications that require tight coils of insulated wire.

User questions & answers

Question: What is the total length of the wire in the awg 28 bntechgo
Answer: I wrapped two primaries at 661 wraps each...so 1322 wraps and about 3 3/4 circumfrance.thats the best I got.
Question: What's that thing called which the wire is wrapped around
Answer: The wire comes on a "spool". The acquirer re-winds it onto a "coil form".
Question: What length of wire is on the spool
Answer: nearly 600 feet. good product
Question: I need 200 feet of copper wire for a project but can’t tell from the description how long this is. Is it at least 200 feet long
Answer: should be approximately 800 ft of 30AWG in a 4oz (1/4lb) spool. There are charts online that give feet/lb for all the wire gages if you want to confirm.

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