NRND status — what it means for your BOM line
The ACM4520V-901-2P-TL00: That means the manufacturer is not accepting new-design wins for this order code, though existing production builds can still be supported through the supply chain. For a BOM that already carries this choke, the NRND flag is a heads-up — not a stop-ship.
900 Ohm common-mode choke with AEC-Q200 grade
This is a two-line common-mode choke from the ACM-V series, rated 900 Ohms impedance at 100 MHz. The impedance peak is tuned for conducted EMI suppression on power lines in the 10–100 MHz range — typical for switching noise from DC-DC converters or motor drive rails. Current rating is 1.2 A max with a DCR of 60 mOhm max. The DCR is the thermal bottleneck — at 1.2 A, I²R loss is about 86 mW, well within the part's dissipation capability given the 125 °C operating ceiling. AEC-Q200 qualification means this choke passed the automotive-grade stress tests: thermal shock, moisture resistance, mechanical shock, and vibration.
Package and reflow fit
Horizontal, 4 PC Pad surface-mount package — 4.70 mm x 4.50 mm footprint, 2.00 mm seated height. The four-pad layout is the standard common-mode choke footprint; the part is symmetrical, so orientation on the pad matters only for the two winding halves. No MSL rating is stated in the record, but AEC-Q200 parts typically ship at MSL 1 unless otherwise marked — verify the reel label before the oven. If it is MSL 1, no bake is needed; if it is MSL 2a or higher, bake it or it popcorns.