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. 669-4207
Mfr. Part No.744841247
TWD109.00
Each
units
47 μH 2A Radial 40mΩ ±30% - 15.5mm 7.5mm 17.5mm 15.5 x 7.5 x 17.5mm - - 10mm WE-CMB
RS Stock No. 675-5232
Mfr. Part No.ELC10D152E
BrandPanasonic
TWD36.40
Each (In a Pack of 5)
units
1.5 mH 420mA Radial 1.5Ω ±10% 13mm 13mm 10mm 15mm 13 (Dia.) x 15mm - - 5mm ELC10D
RS Stock No. 135-0144
Mfr. Part No.RLB0913-183K
BrandBourns
TWD17.80
Each (In a Pack of 10)
units
18 mH 40mA Radial 40Ω ±10% 8.5mm - - 12.5mm 8.5 (Dia.) x 12.5mm Ferrite 200kHz 5mm RLB0913
RS Stock No. 110-1359
Mfr. Part No.ELC12D272E
BrandPanasonic
TWD18.90
Each (In a Bag of 500)
units
2.7 mH 540mA Radial 1890mΩ ±10% 12mm 14mm 12.5mm 16.5mm 14 x 12.5 x 16.5mm Ferrite - 7.5mm ELC12D
RS Stock No. 154-2464
Mfr. Part No.GLA-10-0010
BrandTamura
TWD202.00
Each
units
10 μH 10A Through Hole 8mΩ ±25% 22mm - - 12mm 22 (Dia.) x 12mm Ferrite - 12mm GLA-10
RS Stock No. 715-6810
Mfr. Part No.1422512C
TWD92.00
Each
units
2.2 mH 1.2A Radial 649mΩ ±10% - 27.1mm 25.9mm 20mm 27.1 x 25.9 x 20mm - 700kHz 23.2mm 1400
RS Stock No. 717-3552
Mfr. Part No.DFSG-33-0002
BrandSchurter
TWD383.00
Each
units
- 10A Radial 30mΩ - - 33mm 33mm 25.5mm 33 x 33 x 25.5mm Iron - 15 mm, 17.5mm DFSG
RS Stock No. 168-3216
Mfr. Part No.7448841330
TWD87.80
Each (In a Pack of 5)
units
33 μH 700mA Surface Mount 1025mΩ ±20% - 5.2mm 5.2mm 3.1mm 5.2 x 5.2 x 3.1mm Iron Powder 19MHz - WE-DPC HV
RS Stock No. 170-9269
Mfr. Part No.19R686C
TWD45.10
Each (On a Reel of 80)
units
68 mH 90mA Radial 57Ω ±10% 12mm - - 21mm 12 (Dia.) x 21mm - - 6mm 1900R
RS Stock No. 870-3394
Mfr. Part No.DKFP-6248-D504
BrandSchurter
TWD100.10
Each (In a Pack of 176)
units
4 mH 500mA Radial 500mΩ -30 → +50% - 10.7mm 10.5mm 8.2mm 10.7 x 10.5 x 8.2mm - 1.2MHz 6.25, 8.75mm DKFP
RS Stock No. 167-8331
Mfr. Part No.B82723A2102N001
BrandEPCOS
TWD71.60
Each (In a Box of 400)
units
27 mH 1A Radial 750mΩ ±30% - 28mm 27mm 16.8mm 28 x 27 x 16.8mm Ferrite - 15mm, 25 mm B82723A
RS Stock No. 104-8433
BrandRS PRO
TWD55.60
Each (In a Pack of 5)
units
1 mH 1A Radial 0.426mΩ ±15% 26mm - - 13mm 26 (Dia.) x 13mm - - - DP
RS Stock No. 629-9212
Mfr. Part No.1433393C
TWD91.00
Each
units
33 μH 9.3A Radial 15mΩ ±15% 27mm 28.5mm 25.9mm 14mm 27 (Dia.) x 14mm - 9.1MHz 23.9mm 1400
RS Stock No. 489-0043
Mfr. Part No.744772220
TWD30.80
Each (In a Pack of 10)
units
22 μH 2.3A Radial 55mΩ ±10% 8.3mm - - 10mm 8.3 (Dia.) x 10mm Ferrite - 5mm WE-TI
RS Stock No. 800-4390
Mfr. Part No.13R336C
TWD20.00
Each (In a Bag of 5)
units
33 mH 60mA - 68Ω ±10% 9.5mm - - 13.5mm 9.5 (Dia.) x 13.5mm - 1kHz 5mm 1300R
RS Stock No. 181-5816
Mfr. Part No.SN8S-500JB
BrandKEMET
TWD117.70
Each (In a Tray of 60)
units
72 μH 2A Through Hole 85mΩ - - 18mm 12.5mm 18mm 18 x 12.5 x 18mm Iron - 14mm SN-JB
RS Stock No. 715-7217
Mfr. Part No.19R683C
TWD53.00
Each
units
68 μH 2.9A Radial 55mΩ ±10% 12mm - - 21mm 12 (Dia.) x 21mm - - 6mm 1900R
RS Stock No. 167-0425
Mfr. Part No.B82730U3162A020
BrandEPCOS
TWD49.90
Each (In a Box of 728)
units
1 mH 1.6A Radial 160mΩ -30 → +50% - 16.5mm 11mm 16.5mm 16.5 x 11 x 16.5mm Ferrite 10kHz 8mm B82730U
RS Stock No. 163-7920
Mfr. Part No.7447211681
TWD49.50
Each (In a Tray of 80)
units
680 μH 830mA Radial 760mΩ ±10% 11mm 11mm 11mm 15mm 11 (Dia.) x 15mm Ferrite 1.3MHz 4 x 5mm WE-TIF
RS Stock No. 860-4060
Mfr. Part No.78F100J-RC
BrandBourns
TWD2.70
Each (In a Pack of 10000)
units
10 μH 370mA Axial 750mΩ ±5% 2.79mm 57.91mm - 7.11mm 2.79 (Dia.) x 7.11mm Ferrite DR 18MHz - 78F