Is there a pin-compatible replacement for ACT45B-101-2P-TL003?

Yes, parts like TAI-TECH's ACM4532F2NV-510T02-D and TDK's ACT45B-220-2P-TL003 use the same 1812 package and are likely pin-compatible. However, they are not electrically equivalent and cannot be considered drop-in replacements without validation.

What risks should I check before replacing ACT45B-101-2P-TL003?

The main risk is electrical mismatch. The impedance and inductance of alternatives are significantly lower, which will change the noise filtering characteristics. This could affect your system's electromagnetic compatibility (EMC) and requires careful testing.

ACT45B-101-2P-TL003 Alternatives, Datasheet & Cross Reference | TDK Electronics AG

ACT45B-101-2P-TL003 is a high-performance automotive common mode choke from TDK in an 1812 package. Finding a direct replacement is challenging due to its specific high impedance and inductance values.

AI replacement insight

Electrical riskhigh

Impedance and inductance values are substantially different from the target.

Package risklow

Alternatives with the same 1812 package are available.

Sourcing risklow

Alternatives are active and available from multiple manufacturers.

Can it be replaced directly?

No, there are no direct drop-in replacements for ACT45B-101-2P-TL003 among the candidates reviewed. All alternatives have significantly different electrical characteristics.

Best replacement path

No direct replacement found. The best path is to evaluate parametric alternatives like ACT45B-220-2P-TL003 or ACM4532F2NV-510T02-D, which requires engineering validation of the circuit's noise filtering performance.

Main risk

The primary risk is a significant mismatch in common-mode impedance, which will alter the filter's noise suppression performance and could compromise system EMI/EMC compliance.

Recommended alternatives

AEC-Q200 qualified part in the same package, but with significantly different impedance.

View details

Alternative comparison matrix

Feature / factor	ACT45B-101-2P-TL003	ACT45B-220-2P-TL003	ACM4532F2NV-510T02-D	Compatibility / risk
Impedance	5800 Ω @ 10MHz	1200 Ω @ 10MHz	1000 Ω @ 10MHz	1200 Ω @ 10MHz / 1000 Ω @ 10MHz — Significantly lower impedance.; ACM4532F2NV-510T02-D: Significantly lower impedance.
Inductance	100 µH @ 100kHz	22 µH @ 100kHz	51 µH	22 µH @ 100kHz / 51 µH — Significantly lower inductance.; ACM4532F2NV-510T02-D: Significantly lower inductance.
Current	0.15 A	0.2 A	230 mA	0.2 A / 230 mA — Higher current rating is an upgrade.; ACM4532F2NV-510T02-D: Higher current rating is an upgrade.
Resistance	2.0 Ω	1.0 Ω	1.0 Ω	1.0 Ω — Lower DCR is an upgrade.; ACM4532F2NV-510T02-D: Lower DCR is an upgrade.
Temperature	-40 to +150 °C	-40 to +150 °C	-55°C to +150°C	-40 to +150 °C / -55°C to +150°C — Identical temperature range.; ACM4532F2NV-510T02-D: Wider temperature range.
Package	1812	1812 (4532 Metric)	4532 (1812)	1812 (4532 Metric) / 4532 (1812) — Same package size.; ACM4532F2NV-510T02-D: Same package size.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. The closest options, like TDK's ACT45B-220-2P-TL003, share the same package and automotive grade but have much lower impedance, requiring circuit testing and validation.