Is there a pin-compatible replacement for MOC3063SR2M?

Yes, MOC3083SR2M is a pin-compatible upgrade. MOC3061SR2M is also pin-compatible but requires a significantly higher trigger current (15mA vs 5mA), which must be verified with your drive circuit.

What risks should I check before replacing MOC3063SR2M?

Before replacing MOC3063SR2M, verify the package (SMD vs. DIP), the LED trigger current (Ift), and the output function (zero-cross vs. random-phase). Using a part with the wrong package requires a new PCB, and incorrect electricals can cause circuit failure.

MOC3063SR2M Alternatives, Datasheet & Cross Reference | onsemi

MOC3063SR2M is a popular 600V zero-cross triac driver optocoupler from onsemi in a 6-SMD package. Excellent pin-compatible upgrades and functional alternatives are available.

AI replacement insight

Electrical riskmedium

Some alternatives require higher trigger current (Ift), which must be verified.

Package riskhigh

Several functional alternatives are in a different (DIP) package, requiring a board redesign.

Can it be replaced directly?

Yes, MOC3083SR2M is a pin-compatible upgrade with a higher 800V blocking voltage.

Best replacement path

MOC3083SR2M is the best choice for a pin-compatible upgrade with higher voltage tolerance.

Main risk

The main risks are package mismatch (SMD vs. DIP) and selecting a part with a higher trigger current (Ift).

Recommended alternatives

Electrically identical to the target but in a through-hole (DIP) package, not surface-mount.

View details

Alternative comparison matrix

Feature / factor	MOC3063SR2M	MOC3083SR2M	MOC3063M	MOC3083M	Compatibility / risk
Package	6-SMD, Gull Wing	6-SMD, Gull Wing	6-DIP	6-DIP	6-SMD, Gull Wing / 6-DIP — Package matches, likely pin-compatible.; MOC3063M: Different package (Through-Hole vs. Surface-Mount).; MOC3083M: Different package (Through-Hole vs. Surface-Mount).; MOC3061SR2M: Package matches, likely pin-compatible.
Voltage	600V	800V	600V	800V	800V / 600V — Higher blocking voltage provides more design margin.; MOC3063M: Blocking voltage matches.; MOC3083M: Higher blocking voltage provides more design margin.; MOC3061SR2M: Blocking voltage matches.
Current	5mA	5mA	5mA	5mA	5mA / 15mA — LED trigger current matches.; MOC3063M: LED trigger current matches.; MOC3083M: LED trigger current matches.; MOC3061SR2M: Requires 3x higher trigger current, may not work in all circuits.
Function	Zero-Cross	Zero-Cross	-	-	Zero-Cross — Both are zero-cross triac drivers.

Application & sourcing insights

Questions & answers

The best alternative is MOC3083SR2M. It is a pin-compatible upgrade with a higher 800V blocking voltage and the same 5mA trigger current, offering better performance in the same footprint.