Is there a pin-compatible replacement for WCM3216F2SF-601T03?

Yes, parts like TAI-TECH's WCM3216F2SF-900T04 share the same 1206 4-pin package, but its electricals, especially impedance, differ greatly and must be reviewed.

What risks should I check before replacing WCM3216F2SF-601T03?

The main risk is a mismatch in impedance at 100MHz. The target is 600Ω; available alternatives have much lower values, which will impact EMI suppression performance.

WCM3216F2SF-601T03 Alternatives, Datasheet & Cross Reference | TAI-TECH

Reviewing alternatives for the TAI-TECH WCM3216F2SF-601T03 common mode choke. This 1206 component is rated for 600Ω, 300mA, and 50V. Matching the impedance is the key challenge for replacement.

AI replacement insight

Electrical riskhigh

Impedance mismatch is the primary risk, affecting filtering function.

Package risklow

All candidates share the same 1206 package and likely pinout.

Can it be replaced directly?

No direct drop-in replacement was identified. All candidates have significantly different impedance values, which is a critical parameter.

Best replacement path

Use a parametric search for a 1206 4-pin common mode choke with impedance near 600Ω and current rating ≥300mA.

Main risk

Significant impedance mismatch, which will likely compromise the circuit's EMI suppression performance.

Recommended alternatives

Same series part with matching package and higher current rating, but significantly lower impedance.

View details

Alternative comparison matrix

Feature / factor	WCM3216F2SF-601T03	WCM3216F2SF-900T04	YLM3216-221T	Compatibility / risk
Package	3216 (1206 Metric)	3216 (1206 Metric)	3216 (1206 Metric)	3216 (1206 Metric) — Package size matches.; YLM3216-221T: Package size matches.
Current	300mA	400mA	300mA	400mA / 300mA — Higher current rating provides more margin.; YLM3216-221T: Current rating matches.
Impedance	600Ω	90Ω	220Ω	90Ω / 220Ω — Significantly lower impedance.; YLM3216-221T: Significantly lower impedance.
Dcr	0.80Ω	0.30Ω	0.45Ω	0.30Ω / 0.45Ω — Lower DCR is beneficial.; YLM3216-221T: Lower DCR is beneficial.
Voltage	50V	50V	-	50V — Voltage rating matches.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. Several parts match the package and stress ratings but have significantly different impedance values, requiring circuit validation.