Is there a pin-compatible replacement for AC1206KKX7R9BB225?

Yes, parts like Taiyo Yuden's HMK316AC7225KLHTE share the 1206 package and key electricals. However, it is not AEC-Q200 qualified, which is a critical feature of the original part and must be verified for your application.

What risks should I check before replacing AC1206KKX7R9BB225?

Key risks include package size mismatch requiring PCB changes, different dielectric materials (e.g., X7S vs. X7R) affecting temperature stability, and lack of AEC-Q200 automotive qualification, which can impact reliability and compliance.

AC1206KKX7R9BB225 Alternatives, Datasheet & Cross Reference | Yageo

Finding a substitute for the Yageo AC1206KKX7R9BB225, a 2.2µF 50V 1206 AEC-Q200 capacitor, requires matching capacitance, voltage, package, and automotive qualification. Alternatives exist with variations in these key parameters.

AI replacement insight

Electrical riskhigh

Using a part with a different dielectric (e.g., X7S) can affect circuit performance over temperature.

Package riskhigh

Using a non-1206 part requires a PCB redesign.

Sourcing riskhigh

Lack of AEC-Q200 qualification is a compliance and reliability risk in automotive contexts.

Can it be replaced directly?

No perfect drop-in replacement was found. The closest options have differences in automotive qualification, dielectric type, or package size.

Best replacement path

For existing PCBs, use a 1206 part like HMK316AC7225KLHTE but verify the lack of AEC-Q200 is acceptable. For new designs, consider the 0805 AEC-Q200 part CGA4J3X7R1H225KT000N.

Main risk

The primary risk is substituting a non-AEC-Q200 qualified part into an automotive application that requires it.

Recommended alternatives

A 1206 capacitor with a higher 100V rating, but it is not automotive qualified.

View details

Alternative comparison matrix

Feature / factor	AC1206KKX7R9BB225	HMK316AC7225KLHTE	CGA4J3X7R1H225KT000N	C3216X7S2A225KT000N	Compatibility / risk
Package	1206 (3216 Metric)	1206 (3216 Metric)	0805 (2012 Metric)	1206 (3216 Metric)	1206 (3216 Metric) / 0805 (2012 Metric) — Package size matches.; CGA4J3X7R1H225KT000N: Smaller package requires PCB layout change.; C3216X7S2A225KT000N: Package size matches.
Voltage	50.0 V	100.0 V	50.0 V	-	100.0 V / 50.0 V — Higher voltage rating provides more margin.; CGA4J3X7R1H225KT000N: Voltage rating matches.
Dielectric	X7R	X7R	-	X7S	X7R / X7S — Same dielectric material.; C3216X7S2A225KT000N: X7S has wider capacitance change over temp (±22%) than X7R (±15%).
Application	AEC-Q200	Industrial	AEC-Q200	Commercial	Industrial / AEC-Q200 / Commercial — Candidate is not AEC-Q200 qualified.; CGA4J3X7R1H225KT000N: Automotive qualification matches.; C3216X7S2A225KT000N: Candidate is not AEC-Q200 qualified.

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. For the same footprint, HMK316AC7225KLHTE offers a higher voltage rating but lacks AEC-Q200 qualification. For new designs, CGA4J3X7R1H225KT000N is an AEC-Q200 equivalent in a smaller 0805 package.