Is there a pin-compatible replacement for MOC3023SR2M?

Yes, parts like MOC3052SR2M and MOC3021SR2M use the same 6-SMD package and are considered pin-compatible. However, they are not electrically identical, and the higher trigger current must be verified.

What risks should I check before replacing MOC3023SR2M?

The main risk is the increased LED trigger current (Ift). The target requires 5mA, while alternatives need 10mA or more. You must verify that your control circuit can source this higher current without issue.

MOC3023SR2M Alternatives, Datasheet & Cross Reference | onsemi

Finding a substitute for the MOC3023SR2M involves matching its random-phase driver function, 400V rating, and low 5mA trigger current. While pin-compatible options exist, they often require a higher trigger current.

AI replacement insight

Electrical riskmedium

Candidates require higher trigger current (10-15mA vs 5mA), potentially requiring circuit modification.

Package risklow

Candidates share the same 6-SMD package and are expected to be pin-compatible.

Can it be replaced directly?

No direct drop-in replacement has been identified. MOC3052SR2M is a close functional alternative but requires electrical validation.

Best replacement path

MOC3052SR2M is the most promising alternative, offering a voltage upgrade. However, it requires careful circuit review.

Main risk

The primary risk is the LED trigger current (Ift). All viable alternatives require a higher current, which the existing driver circuit may not support.

Recommended alternatives

A functional alternative with a higher voltage rating, but requires a higher LED trigger current.

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Alternative comparison matrix

Feature / factor	MOC3023SR2M	MOC3052SR2M	MOC3021SR2M	Compatibility / risk
Package	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing — Package is physically compatible.; MOC3021SR2M: Package is physically compatible.
Application	Random-Phase	Random-Phase	Random-Phase	Random-Phase — Both are random-phase (non-zero-crossing) drivers.; MOC3021SR2M: Both are random-phase (non-zero-crossing) drivers.
Voltage	400V	600V	400V	600V / 400V — Higher blocking voltage provides more design margin.; MOC3021SR2M: Blocking voltage is identical.
Current	5mA	10mA	15mA	10mA / 15mA — Requires double the LED trigger current (Ift).; MOC3021SR2M: Requires 3x the LED trigger current (Ift), a major design change.

Application & sourcing insights

Questions & answers

The best alternative identified is the MOC3052SR2M. It has a higher 600V rating but requires double the LED trigger current (10mA vs 5mA), so your drive circuit must be checked.