Power Inductors photo

SMD Power Choke

West Coast Magnetics' 301 series is designed to be used as a power inductor in switchmode power supply applications. These power inductors combine high current handling capability in a low profile SMD package. This inductor has lower EMI than drum core style inductors. Many part numbers can be used as a coupled inductor to accomodate multiple outputs.

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Design Constants
Size CodeInductance,(µH±15%)SchematicDCR (mΩ) each windingDCR (mΩ) parallelI max (amps) each winding a.I max (amps) parallel a.I max (amps) L drop limited b.
301-12.5A102.55.020.026.7
301-23.2A 153.84.116.223.3
301-34.1A256.33.212.620.8
301-44.9A102.55.020.013.4
301-56.4A153.84.116.211.7
301-68.1A256.33.212.610.4
301-79.8C199.55.210.313.4
301-810.0A307.52.911.59.4
301-912.8C2613.04.48.811.7
301-1018.1C4623.03.36.69.8
301-1119.6C199.55.210.36.7
301-1222.1C6030.02.95.88.9
301-1325.6C2613.04.48.85.8
301-1428.8B7926.02.16.27.8
301-1536.1C4623.03.36.64.9
301-1644.1C6030.02.95.84.5
301-1751.2D5555.04.34.35.8
301-1857.6B7926.02.16.23.9
301-1968.5D9292.03.33.35.0
301-2084.1D120120.02.92.94.6
301-2190.0D3838.05.15.13.1
301-22102.0D5555.04.34.32.9
301-23130.0E154154.02.52.53.7
301-24136.0D9292.03.33.32.5
301-25168.0D120120.02.92.92.3
301-26186.0E184184.02.32.33.1
301-27260.0E154154.02.52.51.8
301-28372.0E184184.02.32.31.5
301-29532.0E220220.02.12.11.3

Notes:
a. This is the RMS current which will generate a 40°C T rise with a maximum 1% current ripple.
b. This is the maximum current for no reduction in inductance. Exceeding this value by a factor of 2 will result in an approximate 10% drop in inductance. Beyond this L drops more rapidly.

schematics

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Note: All materials of construction minimum Class B 130 degrees C rated.

Dimensions: Inches/mm

part views

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Note: All materials of construction minimum Class B 130 degrees C rated.

Dimensions: Inches/mm

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