Is there a pin-compatible replacement for MOC3063M?

Yes, MOC3083M is a likely pin-compatible replacement. MOC3061M is also pin-compatible but requires a higher trigger current (15mA vs 5mA), which must be verified with your circuit.

What risks should I check before replacing MOC3063M?

Before replacing MOC3063M, check three key parameters: 1. The package must be DIP-6 for drop-in. 2. The LED trigger current (IFT) must be 5mA or less. 3. The replacement must have a zero-crossing circuit.

MOC3063M Alternatives, Datasheet & Cross Reference | onsemi

MOC3063M is a popular 600V zero-cross triac driver optocoupler in a 6-pin DIP package. When searching for alternatives, focus on matching the trigger current (5mA), zero-cross feature, and package type.

AI replacement insight

Electrical riskhigh

Using a part with higher trigger current (e.g., 15mA) may cause failure to activate.

Package riskmedium

Several alternatives are in SMD packages, requiring a PCB redesign.

Functional riskhigh

Using a non-zero-cross part can cause significant EMI and load stress.

Can it be replaced directly?

Yes, MOC3083M is a strong candidate for direct replacement, offering a higher 800V rating in the same package and a matching 5mA trigger current.

Best replacement path

MOC3083M offers a direct upgrade path with a higher voltage rating in the same package.

Main risk

The primary risk when substituting is a mismatch in the LED trigger current (IFT) or using a random-phase driver instead of a zero-cross type.

Recommended alternatives

A likely pin-compatible upgrade from the same manufacturer with a higher 800V off-state voltage.

View details

Alternative comparison matrix

Feature / factor	MOC3063M	MOC3083M	MOC3063SR2M	MOC3083SR2M	Compatibility / risk
Package	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-SMD, Gull Wing	6-SMD, Gull Wing	6-DIP (0.300", 7.62mm) / 6-SMD, Gull Wing — Same package family.; MOC3063SR2M: Candidate is Surface Mount, Target is Through-Hole.; MOC3083SR2M: Candidate is Surface Mount, Target is Through-Hole.; MOC3061M: Same package family.
Voltage	600V	800V	600V	800V	800V / 600V — Higher off-state voltage is a safe upgrade.; MOC3063SR2M: Off-state voltage matches.; MOC3083SR2M: Higher off-state voltage is a safe upgrade.; MOC3061M: Off-state voltage matches.
Current	5mA	5mA	5mA	5mA	5mA / 15mA — LED Trigger Current (IFT) matches.; MOC3063SR2M: LED Trigger Current (IFT) matches.; MOC3083SR2M: LED Trigger Current (IFT) matches.; MOC3061M: Requires 3x higher LED trigger current.
Application	Yes	Yes	-	-	Yes — Both have zero-crossing circuits.

Application & sourcing insights

Questions & answers

The best alternative is MOC3083M. It is from the same manufacturer, likely pin-compatible, has the same trigger current, and offers a higher 800V off-state voltage, making it a robust upgrade.