Is there a pin-compatible replacement for ACT45C-101-2P-TL000?

No direct pin-for-pin equivalent with identical key parameters has been found. ACT45C-510-2P-TL000 shares the same 1812 package and is likely pin-compatible, but its inductance is 51µH, not 100µH. This change requires engineering validation.

What risks should I check before replacing ACT45C-101-2P-TL000?

Before replacing, check three main risks: 1) Package Mismatch: Ensure the replacement fits your PCB layout, as some alternatives are smaller. 2) Electrical Performance: Verify that any difference in inductance or impedance is acceptable for your filter circuit. 3) Automotive Grade: Confirm the replacement is AEC-Q200 qualified and meets the required temperature range.

ACT45C-101-2P-TL000 Alternatives, Datasheet & Cross Reference | TDK Electronics AG

Finding a substitute for the TDK ACT45C-101-2P-TL000 common mode choke involves balancing package compatibility with electrical performance. While no perfect drop-in replacement exists, several functional and parametric alternatives are available that require engineering review.

AI replacement insight

Package riskhigh

Several candidates are in a smaller 1210 package, requiring a mandatory board redesign.

Electrical riskmedium

Candidates may have different inductance or impedance, which will alter filter behavior and requires validation.

Sourcing risklow

The best candidates are from the same manufacturer (TDK) and are actively produced.

Can it be replaced directly?

No direct, 1-to-1 replacement has been identified. The closest package-compatible part, ACT45C-510-2P-TL000, has significantly different inductance. All options require engineering review.

Best replacement path

For a drop-in replacement, consider ACT45C-510-2P-TL000, but verify if 51µH inductance is acceptable. If a layout change is possible, ACT1210-101-2P-TL00 offers superior temperature performance.

Main risk

The primary risks are package mismatch requiring a new PCB layout, or inductance mismatch affecting circuit filtering performance.

Recommended alternatives

A form-fit alternative in the same 1812 package, but with lower inductance that requires circuit validation.

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Alternative comparison matrix

Feature / factor	ACT45C-101-2P-TL000	ACT45C-510-2P-TL000	ACT1210-101-2P-TL00	ACT1210L-101-2P-TL00	Compatibility / risk
Package	1812 (4532 Metric)	1812 (4532 Metric)	3225 (1210)	1210	1812 (4532 Metric) / 3225 (1210) — Same package and pin count.; ACT1210-101-2P-TL00: Smaller package requires PCB layout change.; ACT1210L-101-2P-TL00: Smaller package requires PCB layout change.
Inductance	100 µH	51 µH	100 µH	100 µH	51 µH / 100 µH — Significantly lower inductance may alter filter performance.; ACT1210-101-2P-TL00: matched; ACT1210L-101-2P-TL00: matched
Current	0.15 A	0.20 A	-	0.15 A	0.20 A / 0.15 A — Higher current rating is an upgrade.; ACT1210L-101-2P-TL00: matched
Dcr	2.0 Ω	1.0 Ω	1.5 Ω	1.5 Ω	1.0 Ω / 1.5 Ω — Lower DCR is an improvement.; ACT1210-101-2P-TL00: Lower DCR is generally favorable.; ACT1210L-101-2P-TL00: Lower DCR is generally favorable.
Temperature	-40 to +125 °C	-	-55°C to +150°C	-40°C to +125°C	-55°C to +150°C / -40°C to +125°C — Wider operating range.; ACT1210L-101-2P-TL00: matched

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. If you cannot change the PCB layout, ACT45C-510-2P-TL000 is the closest option, but you must verify if its lower 51µH inductance is acceptable. If a layout change is possible, ACT1210-101-2P-TL00 is a strong choice with better temperature specs.