Wire-Wound Surface Mount Inductors

Wire wound surface mount inductors are passive circuit components, meaning they require an external power source. They have a core made of a magnetic metal like iron with wire wound around it. Energy is stored in a magnetic field when an electrical current flows through the coiled wire which has thick insulation to make the inductors suitable for use with larger currents.


What are wire wound surface mount inductors used for?

They are typically found in car audio and electronic control units (ECUs) because they can block or filter radio frequencies. Unwanted radio frequencies can interfere with audio sound quality and disrupt electrical circuits. These inductors are also used in electronic equipment used in communication infrastructures and mobile base stations.

This ability to minimise interference makes them ideal for use with DC/DC converters in power distribution systems too.

Types of wire wound surface mount inductors

Some inductors have added magnetic shielding which blocks unwanted magnetism that can interfere with the circuit. Some wire wound inductors are wound with special techniques that enhance performance and reduce the unit size to save space in circuit boards.


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Description Price Inductance Maximum DC Current Package/Case Length Automotive Standard Depth Height Diameter Dimensions Shielded Tolerance Maximum DC Resistance Series Core Material
RS Stock No. 792-2812
Mfr. Part No.74438335220
MYR5.78
Each
units
22 μH 600mA 3015 3mm - 3mm 1.5mm - 3 x 3 x 1.5mm - ±20% 1.04Ω WE-MAPI Composite Iron Powder
RS Stock No. 163-4985
Mfr. Part No.74438335220
MYR4.71
Each (On a Reel of 1000)
units
22 μH 600mA 3015 3mm - 3mm 1.5mm - 3 x 3 x 1.5mm - ±20% 1.04Ω WE-MAPI Composite Iron Powder
RS Stock No. 816-4931
Mfr. Part No.7443643300
MYR35.15
Each
units
33 μH 30A 2818 28.5mm - 19.5mm 18.5mm - 28.5 x 19.5 x 18.5mm Yes ±15% 2.4mΩ WE-HCF MnZn
RS Stock No. 163-5518
Mfr. Part No.7443643300
MYR35.154
Each (In a Tray of 30)
units
33 μH 30A 2818 28.5mm - 19.5mm 18.5mm - 28.5 x 19.5 x 18.5mm Yes ±15% 2.4mΩ WE-HCF MnZn
RS Stock No. 500-3228
Mfr. Part No.744252220
MYR9.87
Each (In a Pack of 5)
units
22 μH 700mA - 9.2mm - 6.6mm 2.5mm - 9.2 x 6.6 x 2.5mm - -30 → +50% 140mΩ WE-SL3 Ferrite
RS Stock No. 744-4845
Mfr. Part No.744066680
MYR7.93
Each (In a Bag of 5)
units
68 μH 1.5A 1038 10mm - 10mm 3.8mm - 10 x 10 x 3.8mm Yes ±30% 216mΩ WE-TPC Ferrite
RS Stock No. 163-3770
Mfr. Part No.74477810
MYR6.508
Each (On a Reel of 1000)
units
10 μH 1.38A - 7.3mm - 7.3mm 3.2mm - 7.3 x 7.3 x 3.2mm Yes ±20% 72mΩ WE-PD Ferrite
RS Stock No. 798-1767
Mfr. Part No.744774133
MYR7.20
Each
units
33 μH 1.09A 5848 5.8mm - 5.2mm 4.5mm - 5.8 x 5.2 x 4.5mm No ±15% 230mΩ - -
RS Stock No. 163-5051
Mfr. Part No.744774133
MYR4.763
Each (On a Reel of 1500)
units
33 μH 1.09A 5848 5.8mm - 5.2mm 4.5mm - 5.8 x 5.2 x 4.5mm No ±15% 230mΩ - -
RS Stock No. 617-1495
Mfr. Part No.74477810
MYR8.42
Each
units
10 μH 1.38A - 7.3mm - 7.3mm 3.2mm - 7.3 x 7.3 x 3.2mm Yes ±20% 72mΩ WE-PD Ferrite
RS Stock No. 898-8181
Mfr. Part No.744913050
MYR3.59
Each (In a Bag of 5)
units
5 nH 4A 3136 3.68mm - 3.05mm 3.18mm - 3.68 x 3.05 x 3.18mm - - 1.8mΩ WE-CAIR -
RS Stock No. 500-3212
Mfr. Part No.744253200
MYR10.09
Each (In a Pack of 5)
units
20 μH 500mA - 9.2mm - 6.6mm 2.5mm - 9.2 x 6.6 x 2.5mm - -30 → +50% 160mΩ WE-SL3 Ferrite
RS Stock No. 500-2994
Mfr. Part No.744231121
MYR3.78
Each (In a Pack of 5)
units
- 370mA 0805 (2012M) 2mm - 1.2mm 1.2mm - 2 x 1.2 x 1.2mm - ±25% 300mΩ WE-CNSW SMD Ferrite
RS Stock No. 863-0791
Mfr. Part No.74438336010
MYR5.93
Each (In a Bag of 5)
units
1 μH 4A 3020 3mm - 3mm 2mm - 3 x 3 x 2mm Yes ±20% 32mΩ WE-MAPI Magnetic Iron Alloy
RS Stock No. 163-5097
Mfr. Part No.744777920
MYR6.34
Each (On a Reel of 1000)
units
100 μH 790mA - 7.3mm - 7.3mm 4.5mm - 7.3 x 7.3 x 4.5mm Yes ±20% 380mΩ WE-PD -
RS Stock No. 163-5089
Mfr. Part No.7447779122
MYR6.46
Each (On a Reel of 1000)
units
22 μH 1.41A - 7.3mm - 7.3mm 4.5mm - 7.3 x 7.3 x 4.5mm Yes ±20% 110mΩ WE-PD -
RS Stock No. 163-7441
Mfr. Part No.74438336010
MYR3.794
Each (On a Reel of 1000)
units
1 μH 4A 3020 3mm - 3mm 2mm - 3 x 3 x 2mm Yes ±20% 32mΩ WE-MAPI Magnetic Iron Alloy
RS Stock No. 789-7123
Mfr. Part No.7447779115
MYR7.92
Each
units
15 μH 1.6A - 7.3mm - 7.3mm 4.5mm - 7.3 x 7.3 x 4.5mm Yes ±20% 81mΩ WE-PD -
RS Stock No. 163-4810
Mfr. Part No.744043331
MYR2.779
Each (On a Reel of 500)
units
330 μH 285mA 4828 4.8mm - 2.8mm 4.8mm - 4.8 x 4.8 x 2.8mm Yes ±30% 1.7Ω WE-TPC Ferrite
RS Stock No. 163-3756
Mfr. Part No.74477420
MYR4.67
Each (On a Reel of 1500)
units
100 μH 570mA - 5.8mm - 5.2mm 4.5mm - 5.8 x 5.2 x 4.5mm No ±10% 650mΩ WE-PD2 Ferrite