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. 500-2994
Mfr. Part No.744231121
MYR4.34
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. 724-1677
Mfr. Part No.DLW21SN900SQ2L
BrandMurata
MYR2.26
Each (In a Pack of 10)
units
- 330mA 0805 (2012M) 2mm - 1.2mm 1.2mm - 2 x 1.2 x 1.2mm - ±25% 350mΩ DLW21S -
RS Stock No. 172-9772
Mfr. Part No.SRR1210-680M
BrandBourns
MYR2.34
Each (On a Reel of 250)
units
68 μH 3A 1210 (3225M) 12mm - 12mm 10mm - 12 x 12 x 10mm Yes ±20% 102mΩ SRR1210 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. 108-4741
Mfr. Part No.SLF12555T-100M3R4-PF
BrandTDK
MYR3.046
Each (On a Reel of 500)
units
10 μH 4.3A - 12.5mm - 12.5mm 5.5mm - 12.5 x 12.5 x 5.5mm Yes ±20% 21.5mΩ SLF Ferrite
RS Stock No. 172-8582
Mfr. Part No.SRP4020TA-3R3M
BrandBourns
MYR4.17
Each (On a Reel of 3000)
units
3.3 μH 3.5A 4020 4.45mm AEC-Q200 4.06mm 1.8mm - 4.45 x 4.06 x 1.8mm Yes ±20% - SRP4020TA Carbonyl Powder
RS Stock No. 163-7441
Mfr. Part No.74438336010
MYR3.80
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. 800-7973
Mfr. Part No.744043331
MYR7.35
Each
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. 167-5687
Mfr. Part No.LQG15HS18NJ02D
BrandMurata
MYR0.078
Each (On a Reel of 10000)
units
18 nH 300mA 0402 (1005M) - - - - - 1 x 0.5 x 0.5mm - ±5% 360mΩ LQG15H -
RS Stock No. 172-9678
Mfr. Part No.SRR7032-471M
BrandBourns
MYR2.141
Each (On a Reel of 1500)
units
470 μH 200mA 7032 7mm - 7mm 3.2mm - 7 x 7 x 3.2mm Yes ±20% 2.4Ω SRR7032 Ferrite
RS Stock No. 163-5490
Mfr. Part No.74404084082
MYR3.21
Each (On a Reel of 1000)
units
8.2 μH 3.45A 8040 8mm - 8mm 4.2mm - 8 x 8 x 4.2mm Yes ±20% 26mΩ WE-LQS -
RS Stock No. 170-2826
Mfr. Part No.B82422A1153K100
BrandEPCOS
MYR1.416
Each (On a Reel of 2000)
units
15 μH 165mA 1210 (3225M) 3.2mm - 2.5mm 2mm - 3.2 x 2.5 x 2mm - ±10% 1.85Ω SIMID Ferrite
RS Stock No. 202-3538
Mfr. Part No.NFM3DCC222R1H3L
BrandMurata
MYR2.19
Each (In a Pack of 20)
units
- 300mA 1206 (3216M) 3.2mm - 1.25mm 0.7mm - 3.2 x 1.25 x 0.7mm - - 1GΩ NFM3DCC222R1H3 -
RS Stock No. 819-3488
Mfr. Part No.SRP1265A-100M
BrandBourns
MYR5.11
Each (In a Bag of 5)
units
10 μH 10A 1265 13.5mm AEC-Q200 12.5mm 6.2mm - 13.5 x 12.5 x 6.2mm Yes ±20% 16.5mΩ SRP1265A Carbonyl Powder
RS Stock No. 770-1845
Mfr. Part No.DRA73-221-R
MYR12.066
Each (In a Bag of 5)
units
220 μH 510mA 73 7.6mm - 7.6mm 3.55mm - 7.6 x 7.6 x 3.55mm Yes ±20% 1.23Ω DRA Ferrite
RS Stock No. 715-7083
Mfr. Part No.50474C
MYR4.83
Each
units
470 μH 700mA - 7mm - 5.9mm 3.6mm - 7 x 5.9 x 3.6mm - -30 → +50% 300mΩ 5000 -
RS Stock No. 715-7099
Mfr. Part No.50475C
MYR4.83
Each
units
4.7 mH 400mA - 7mm - 5.9mm 3.6mm - 7 x 5.9 x 3.6mm - -30 → +50% 700mΩ 5000 -
RS Stock No. 172-9774
Mfr. Part No.SRR1210-101M
BrandBourns
MYR2.32
Each (On a Reel of 250)
units
100 μH 2.5A 1210 (3225M) 12mm - 12mm 10mm - 12 x 12 x 10mm Yes ±20% 135mΩ SRR1210 Ferrite
RS Stock No. 172-9564
Mfr. Part No.SRN5020-100M
BrandBourns
MYR1.127
Each (On a Reel of 2000)
units
10 μH 1.45A rms - 5mm - 5mm 2mm - 5 x 5 x 2mm Yes ±20% 144mΩ SRN5020 Ferrite
RS Stock No. 124-1890
Mfr. Part No.7447709101
MYR9.86
Each (In a Pack of 5)
units
100 μH 2.5A 1210 (3225M) 12mm - 12mm 10mm - 12 x 12 x 10mm Yes ±20% 110mΩ WE-PD -
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