Leaded Inductors

Leaded inductors are components that act as resistors to changes in currents and absorb EMI (electromagnetic interference) which could affect the status of electrical circuits in devices. Leaded inductors are composed of coils wrapped around magnetic cores and store energy in the form of a magnetic field as opposed to an electric field, which is stored by a capacitor. These inductors can found in several different shapes, including radial, axial and through-hole components and leads attached concentrically to the opposite ends of the inductor cores or as linear components. At RS Components, we have a varied range of leaded inductors, including axial, radial, through-hole and panel-mount inductors, with products from brands such as Bourns, EPCOS, Murata Power Solutions, Panasonic, Wurth Elektronik and our own RS PRO brand.

What are leaded inductors used for?

Leaded inductors are used to suppress asymmetrical interferences in low-voltage and high-voltage circuits. They typically have ferrite cores, however it is possible to find leaded inductors with cores made of other materials, such as nano crystalline or iron. With low or DC voltages, they act as continuous circuits to keep the current flowing if there are interferences but otherwise have no effect on the signal. With high voltage applications, they are able to prevent the current from flowing due to their high resistance, thus are used to protect the circuit from voltage spikes and prevent damages.

Types of leaded inductors

Leaded inductors come in two main categories, VHF-choke and RF-choke:

  • VHF (very high frequency) versions are used for line voltage applications to block or filter EMI in small applications or for decoupling in telecom and entertainment electronics.
  • RF (radio frequency) versions are used in low-frequency applications of signal and control circuits and are designed to block radio frequencies while allowing audio signals to be transmitted.

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Description Price Inductance Maximum DC Current Mounting Type Maximum DC Resistance Tolerance Diameter Length Depth Height Dimensions Core Material Maximum Self Resonant Frequency Lead Pitch Series
RS Stock No. 811-8825
Mfr. Part No.RLB0912-102KL
BrandBourns
TWD13.10
Each (In a Bag of 10)
units
1 mH 200mA Radial 4.3Ω ±10% 8.7mm - - 10mm 8.7 (Dia.) x 10mm Ferrite 1.9MHz 5mm RLB
RS Stock No. 172-7064
Mfr. Part No.RLB0912-102KL
BrandBourns
TWD9.30
Each (In a Bag of 200)
units
1 mH 200mA Radial 4.3Ω ±10% 8.7mm - - 10mm 8.7 (Dia.) x 10mm Ferrite DR 1.9MHz 5mm RLB
RS Stock No. 489-0166
Mfr. Part No.744821150
TWD133.00
Each
units
5 mH 1A Radial 200mΩ ±30% - 15mm 7.5mm 18mm 15 x 7.5 x 18mm - - 10mm WE-CMB HC
RS Stock No. 308-8794
Mfr. Part No.7447076
TWD157.00
Each
units
150 μH 6.1A Lead Wire 45mΩ ±20% 27.5mm - 14mm - 27.5 (Dia.) x 14mm Composite Iron Powder - 11.5mm WE-FI
RS Stock No. 163-3299
Mfr. Part No.7447076
TWD171.30
Each (In a Box of 30)
units
150 μH 6.1A Lead Wire 45mΩ ±20% 27.5mm - 13mm 13mm 27.5 (Dia.) x 13mm Iron Powder - 11.5mm WE-FI
RS Stock No. 871-1363
Mfr. Part No.B82726S2163N030
BrandEPCOS
TWD289.00
Each
units
2.2 mH 16A Radial 7.1mΩ ±30% 50mm 50mm 23mm 49mm 50 x 23.2 x 49mm Ferrite 10kHz 18mm B82726S
RS Stock No. 489-0318
Mfr. Part No.744824101
TWD258.00
Each
units
1 mH 10A Radial 7mΩ ±30% - 27.5mm 18.5mm 33mm 27.5 x 18.5 x 33mm - - 10mm WE-CMB
RS Stock No. 489-0352
Mfr. Part No.744824220
TWD179.00
Each
units
20 mH 2A Radial 220mΩ ±30% - 27.5mm 18.5mm 33mm 27.5 x 18.5 x 33mm - - 10mm WE-CMB
RS Stock No. 122-3298
Mfr. Part No.SMV60
TWD167.00
Each
units
120 μH 6A Radial 40mΩ - - 32mm 17mm 30mm 32 x 17 x 30mm Ferrite - 7.62 mm, 10.16 mm, 25.4mm SMV
RS Stock No. 163-3404
Mfr. Part No.744825320
TWD198.40
Each (In a Tray of 20)
units
20 mH 3A Radial 160mΩ ±30% - 30.5mm 19mm 35mm 30.5 x 19 x 35mm - - 25mm WE-CMB
RS Stock No. 167-0422
Mfr. Part No.B82726S2163N030
BrandEPCOS
TWD233.50
Each (In a Box of 156)
units
2.2 mH 16A Radial 7.1mΩ ±30% - 50mm 23mm 49mm 50 x 23 x 49mm Ferrite 10kHz 18mm B82726S
RS Stock No. 167-0312
Mfr. Part No.B82721K2202N001
BrandEPCOS
TWD52.80
Each (In a Box of 720)
units
1 mH 2A Radial 80mΩ ±30% - 18.2mm 13.2mm 20.3mm 18.2 x 13.2 x 20.3mm Ferrite - 10 mm, 15mm B82721K
RS Stock No. 163-3398
Mfr. Part No.744824101
TWD170.20
Each (In a Box of 25)
units
1 mH 10A Radial 7mΩ ±30% - 27.5mm 18.5mm 33mm 27.5 x 18.5 x 33mm - - 10mm WE-CMB
RS Stock No. 489-0425
Mfr. Part No.744825320
TWD201.00
Each
units
20 mH 3A Radial 160mΩ ±30% - 30.5mm 19mm 35mm 30.5 x 19 x 35mm - - 25mm WE-CMB HC
RS Stock No. 772-0133
Mfr. Part No.B82721K2202N001
BrandEPCOS
TWD101.00
Each
units
1 mH 2A Radial 80mΩ ±30% - 18.2mm 13.2mm 20.3mm 18.2 x 13.2 x 20.3mm Ferrite - 10 mm, 15mm B82721A
RS Stock No. 163-3399
Mfr. Part No.744824220
TWD176.40
Each (In a Box of 25)
units
20 mH 2A Radial 220mΩ ±30% - 27.5mm 18.5mm 33mm 27.5 x 18.5 x 33mm - - 10mm WE-CMB
RS Stock No. 110-1296
Mfr. Part No.ELC08D100E
BrandPanasonic
TWD12.00
Each (In a Bag of 1000)
units
10 μH 2.8A Radial 22mΩ ±20% 8mm 10mm 8.5mm 13mm 10 x 8.5 x 13mm Ferrite - 5mm ELC08D
RS Stock No. 233-5134
Mfr. Part No.ELC08D100E
BrandPanasonic
TWD31.00
Each (In a Pack of 5)
units
10 μH 2.8A Radial 22mΩ ±20% - 10mm 8.5mm 13mm 10 x 8.5 x 13mm Ferrite - 5mm ELC08D
RS Stock No. 163-3793
Mfr. Part No.7448229004
TWD173.60
Each (In a Box of 90)
units
350 μH 8.5A Through Hole 7mΩ ±30% - 18.5mm 14.5mm 22mm 18.5 x 14.5 x 22mm Ferrite - 5mm WE-CMB HC
RS Stock No. 811-8884
Mfr. Part No.RLB0912-3R3ML
BrandBourns
TWD10.40
Each (In a Bag of 10)
units
3.3 μH 3.6A Radial 18mΩ ±20% 8.7mm - - 10mm 8.7 (Dia.) x 10mm Ferrite 50MHz 5mm RLB