12 Amp Common Mode Choke

West Coast Magnetics' 503 series common mode chokes provide excellent noise attenuation in a small surface mount design. Typical common mode noise impedance is 1 kOhm from 300 kHz to 30 MHz. With a continuous RMS current rating of up to 12 amps, this common mode choke can actually handle a peak current of 30 amps for a short duration of time. These chokes are available in tape and reel at larger quanties.

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Design Constants

Part Number	L min(µH)	Lkg max (µH)	DCR Nominal mOhms	Rated RMS Current (amps)	Hypot Vac
503-1	1280	10.9	197	1.4	1500
503-2	857	7.7	105	1.9	1500
503-3	519	5.4	52	2.7	1500
503-4	320	4.0	26	3.8	1500
503-5	169	2.2	12	5.6	1500
503-6	95.3	1.4	6.0	7.9	1500
503-7	42.3	0.79	2.6	11.9	1500

schematics

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Product Code	L	W	H (max)	X₁	X₂	l₁	l₂
503-1	0.63/16.0	0.55/14.0	.34/8.6/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-2	0.63/16.0	0.55/14.0	.34/8.6/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-3	0.63/16.0	0.55/14.0	.34/8.6/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-4	0.63/16.0	0.55/14.0	.35/8.9/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-5	0.63/16.0	0.55/14.0	.35/8.9/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-6	0.63/16.0	0.55/14.0	.36/9.1/0.53	13.5/0.34	8.6/0.175	4.5/0.06	1.5
503-7	0.63/16.0	0.55/14.0	.36/9.1/0.53	13.5/0.34	8.6/0.175	4.54/0.06	1.5

Dimensions: Inches/mm

graphs

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notes

Notes:

The RMS current rating on this datasheet will lead to an approximate 40 degrees C temperature rise above ambient. These chokes will handle up to 2.5 times this current for a short duration.
All materials of construction are rated for 155 degrees C continuous service.