Is there a pin-compatible replacement for MC7815CDTRKG?

CJ7815B-TFN-ARG uses a compatible TO-252/DPAK package. However, its lower 30V max input voltage must be verified before use as a drop-in replacement.

What risks should I check before replacing MC7815CDTRKG?

Key risks include package footprint differences (e.g., DPAK vs D2PAK or TO-220), lower maximum input voltage ratings, and thermal performance. Always check the datasheet.

MC7815CDTRKG Alternatives, Datasheet & Cross Reference | onsemi

MC7815CDTRKG is a popular 15V, 1A fixed positive voltage regulator from onsemi in a DPAK-3 package. Finding a substitute requires matching voltage, current, and package footprint.

AI replacement insight

Electrical riskhigh

Many candidates have lower max input voltage.

Package riskhigh

Many candidates are in different packages (D2PAK, TO-220).

Sourcing risklow

The 7815 regulator family is widely multi-sourced.

Can it be replaced directly?

No direct, drop-in replacement has been verified. CJ7815B-TFN-ARG is the closest in form-factor but has a lower input voltage rating (30V).

Best replacement path

The best path is a regulator in a DPAK/TO-252 package with Vin >= 35V and Iout >= 1.0A. CJ7815B-TFN-ARG is close but has a lower Vin.

Main risk

The main risks are package incompatibility requiring board redesign and lower maximum input voltage ratings which could damage the component.

Recommended alternatives

Alternative in a compatible DPAK package, but with a lower maximum input voltage rating.

View details

Alternative comparison matrix

Feature / factor	MC7815CDTRKG	CJ7815B-TFN-ARG	L7815CD2T-TR	LM7815T	Compatibility / risk
Package	DPAK-3	TO-252-2L	D2PAK	TO-220-3	TO-252-2L / D2PAK / TO-220-3 — TO-252 is equivalent to DPAK, likely a match.; L7815CD2T-TR: D2PAK is larger than DPAK, requires layout change.; LM7815T: Through-hole package vs. surface-mount.
Output Voltage V	15.0V	15.0V	15.0V	-	15.0V — matched; L7815CD2T-TR: matched
Input Voltage V	35.0V	30V	30.0V	35.0V	30V / 30.0V / 35.0V — Candidate has lower max input voltage.; L7815CD2T-TR: Candidate has lower max input voltage.; LM7815T: matched
Output Current A	1.0A	1.0A	1.5A	1.2A	1.0A / 1.5A / 1.2A — matched; L7815CD2T-TR: Higher output current capability.; LM7815T: Higher output current capability.
Pinout	Standard	unknown	-	-	unknown — Pinout not verified, but standard for this package.

Application & sourcing insights

Questions & answers

CJ7815B-TFN-ARG is a strong candidate in the same package, but requires verifying your input voltage is below its 30V maximum (vs. 35V for the original).