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. 863-1273
Mfr. Part No.760308102210
TWD369.00
Each
units
7.5 μH 3A Axial 200mΩ ±10% - 37mm 1.8mm 37mm 37 x 37 x 1.8mm Ferrite 22MHz - WE-WPCC
RS Stock No. 124-1530
Mfr. Part No.7447060
TWD76.40
Each (In a Pack of 5)
units
300 μH 2.5A Through Hole 150mΩ ±20% 21mm - - 11mm 21 (Dia.) x 11mm Iron Powder - 9mm WE-FI
RS Stock No. 163-3395
Mfr. Part No.744823333
TWD131.30
Each (In a Tray of 90)
units
3.3 mH 2.5A Radial 60mΩ ±30% - 23.5mm 13.5mm 28mm 23.5 x 13.5 x 28mm - - 7.5mm WE-CMB
RS Stock No. 191-0598
Mfr. Part No.B78108S1104J000
BrandEPCOS
TWD13.20
Each (In a Pack of 10)
units
100 μH 370mA Axial 1.7Ω ±5% 4mm 11.5mm - - 4 (Dia.) x 11.5mm Ferrite 5MHz - BC
RS Stock No. 489-0302
Mfr. Part No.744823220
TWD168.00
Each
units
20 mH 1.5A Radial 270mΩ ±30% - 23mm 13mm 28mm 23 x 13 x 28mm - - 7.5mm WE-CMB HC
RS Stock No. 163-3394
Mfr. Part No.744823220
TWD131.30
Each (In a Box of 90)
units
20 mH 1.5A Radial 270mΩ ±30% - 23mm 13mm 28mm 23 x 13 x 28mm - - 7.5mm WE-CMB
RS Stock No. 432-4394
Mfr. Part No.744772470
TWD32.60
Each (In a Pack of 10)
units
47 μH 1.3A Radial 100mΩ ±10% 8.3mm - - 10mm 8.3 (Dia.) x 10mm Ferrite - 5mm WE-TI
RS Stock No. 484-6399
Mfr. Part No.7447728
TWD36.00
Each (In a Pack of 5)
units
10 μH 550mA Radial 50mΩ ±20% 7.2mm - - 10mm 7.2 (Dia.) x 10mm Ferrite 20MHz 2.54mm WE-TI
RS Stock No. 603-8411
Mfr. Part No.ELF0505RA-470J-3PF
BrandTDK
TWD14.30
Each (In a Pack of 10)
units
47 μH 240mA - 2.05Ω ±5% 5.5mm - - 8.5mm 5.5 (Dia.) x 8.5mm - 17.5MHz 5mm -
RS Stock No. 288-222
Mfr. Part No.SF1122
TWD141.00
Each
units
2.9 mH - Flying Leads 500mΩ ±20% 32mm - 13mm 13mm 32 (Dia.) x 13mm Composite Iron Powder - - SF
RS Stock No. 489-0015
Mfr. Part No.744742223
TWD31.90
Each (In a Pack of 10)
units
22 mH 100mA Radial 55Ω ±5% 8.5mm - - 10mm 8.5 (Dia.) x 10mm Ferrite - 5mm WE-TI
RS Stock No. 163-4251
Mfr. Part No.7448263505
TWD694.20
Each (In a Box of 18)
units
500 μH 35A Through Hole 1.7mΩ ±30% - 47mm 23.5mm 43mm 47 x 23.5 x 43mm Ferrite 100kHz 10.5mm WE-CMB
RS Stock No. 715-7100
Mfr. Part No.51505C
TWD93.00
Each
units
5 mH 1.2A Radial 197mΩ - - 18mm 10mm 24mm 18 x 10 x 24mm - - 12.7mm 5100
RS Stock No. 772-0183
Mfr. Part No.B82723J2102N001
BrandEPCOS
TWD135.00
Each
units
27 mH 1A Radial 750mΩ ±30% - 28mm 18.6mm 30.5mm 28 x 18.6 x 30.5mm Ferrite - 12.5 mm, 15mm B82721A
RS Stock No. 163-7512
Mfr. Part No.760308102207
TWD316.10
Each (In a Box of 56)
units
8 μH 5A Axial 80mΩ ±10% - 40mm 1.2mm 40mm 40 x 40 x 1.2mm Ferrite 16MHz 5mm WE-WPCC
RS Stock No. 163-3347
Mfr. Part No.744772470
TWD25.50
Each (In a Tray of 140)
units
47 μH 2.3A Radial 120mΩ ±10% 7.8mm - - 9.5mm 7.8 (Dia.) x 9.5mm Ferrite 9MHz 5mm WE-TI
RS Stock No. 883-7780
Mfr. Part No.RS514-4-02
BrandSchaffner
TWD162.20
Each (In a Pack of 25)
units
10 (Dual Load) μH, 40 (Dual Load) μH 4A Radial 20 (Dual Load) mΩ, 40 (Single Load) mΩ - - 21.5mm 22.5mm 13.2mm 21.5 x 22.5 x 13.2mm - 18 (Single Load) MHz, 22 (Dual Load) MHz 20.1mm RS
RS Stock No. 228-589
Mfr. Part No.1410478C
TWD141.00
Each
units
100 μH 7.8A Radial 40mΩ ±10% 32.4mm 31.8mm 29.8mm 21.8mm 32.4 x 29.8 x 21.8mm - 3.3MHz 29.3mm 1400
RS Stock No. 106-7739
Mfr. Part No.1410478C
TWD135.30
Each (In a Box of 15)
units
100 μH 7.8A Radial 40mΩ ±10% 29.8mm 32.4mm 29.8mm 21.8mm 29.8 (Dia.) x 21.8mm - 3.3MHz 29.3mm 1400
RS Stock No. 769-0578
Mfr. Part No.RB8522-16-3M0
BrandSchaffner
TWD419.00
Each
units
3 mH 16A Radial 8.4mΩ -30 → +50% - 50mm 43.4mm 58mm 50 x 43.4 x 58mm - 400Hz 5.08mm RB