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onsemi MOC3023SR2M — Optoisolators
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MOC3023SR2M onsemi Optoisolator Triac 4170Vrms 6-SMD

MPN MOC3023SR2M
Active Spot Stock · 24-48h Dispatch 100% Original Sealed

onsemi MOC3023SR2M, 1-channel triac-output optoisolator, 4170 Vrms isolation, 400 V off-state, 5 mA max LED trigger current, non-zero-crossing, surface-mount 6-SMD gull wing package, -40°C to 85°C.

In Stock: 1,871 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$0.64 / pc
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1+ pcs
$0.64
10+ pcs
$0.53
30+ pcs
$0.48
100+ pcs
$0.42
500+ pcs
$0.31
1,000+ pcs
$0.30
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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (14)
Package / Case 6-SMD, Gull Wing
ALT
Facing long factory lead times or allocation on MOC3023SR2M? Verified pin-compatible alternatives available with active Shenzhen stock and 100% solder-ready footprint match.
View Pin Alternates (4)

Full Technical Specifications

14 Parameters
MOC3023SR2M specifications
Parameter / AttributeSpecification / Value
Output typeTriac
MountingSurface Mount
Voltage - isolation4170Vrms
Voltage - off state400 V
Voltage - forward (Vf)1.15V
Current - hold100µA (Typ)
Current - DC forward (If)60 mA
Current - LED trigger (Ift)5mA
Operating temperature-40°C ~ 85°C
Approval agencyUL
PackageTape & Reel (TR) Cut Tape (CT)
Case6-SMD, Gull Wing
Channels1
Zero crossing circuitNo
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for MOC3023SR2M?

Package: DIP-6 · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 98%
Supply Chain & Allocation Reality:

The MOC3021 is the little six-pin bridge between logic and mains in dimmers, speed controls, heater regulators and appliance boards: an LED driving a light-triggered triac, packaged with 7500V isolation. The family divides on two axes buyers conflate at their cost. Phase-control circuits (dimmers, motor speed) need the random-phase parts (MOC302x); on/off switching of resistive loads wants the zero-cross parts (MOC304x) so switching happens near the mains zero to tame inrush and EMI. And within each family, only the LED trigger current differs across the ladder (30 / 15 / 10 / 5mA from 3020 to 3023) - a substitution that ignores the trigger grade fails only on cold boards and marginal drive circuits.

Verified Pin-Compatible Replacements (4 verified alternatives)

MOC3023 onsemi / Lite-On DIP-6
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

Same Function, Tighter Trigger

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

Random-phase optotriac identical to the MOC3021 but triggering at 5mA LED current instead of 15mA - the sensitive end of the ladder (3020 is 30mA, 3022 is 10mA).

400V peak blocking, the 240V-AC class; 7500V isolation common to the family.

Compatibility & Drop-In Notes: The ladder direction to remember: a more sensitive trigger (3023) substitutes anywhere a 3021 worked, because the circuit was designed to deliver at least 15mA. Going the other way (15mA part where a 5mA grade was specified) asks the driving logic for three times the current it was designed to give - it may pass on the bench and fail cold.
Package & Solder Footprint: DIP-6 standard optotriac pinout, 1:1 with the family.
Shenzhen Warehouse Stock & MOQ: Volume stock; the grade letters documented on the reel label.
Request Volume Quote for MOC3023 Compare MOC3023SR2M vs MOC3023 Spec Matrix
MOC3041 onsemi / Lite-On / multiple DIP-6
Functional Equivalent
Availability & Target Pricing:

The Zero-Cross Sibling - Different Job

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The zero-cross version: output inhibits until the mains voltage is near zero (5V typical, 20V max), producing full-wave on/off rather than phase control, with a far higher guaranteed dv/dt (1000V/us minimum) for noisy loads.

400V class; grades 3041/3042/3043 across 15/10/5mA trigger currents.

Compatibility & Drop-In Notes: The substitution rule: zero-cross parts do not do phase control - the detector caps the firing angle, so a dimmer fitted with one behaves as a switch that misses low-brightness settings. In the other direction, a random-phase part in an on/off circuit switches at arbitrary points: inrush and EMI come back, and resistive loads with high cold current suffer.
Package & Solder Footprint: Same DIP-6 pinout as the 302x family - the board cannot tell them apart.
Shenzhen Warehouse Stock & MOQ: Stocked as the pair with 302x; label the drawer, not the bag.
Request Volume Quote for MOC3041 Compare MOC3023SR2M vs MOC3041 Spec Matrix
MOC3052 Lite-On / Vishay / multiple DIP-6
Functional Equivalent
Availability & Target Pricing:

Random-Phase at 600V

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The higher-voltage random-phase member: 600V peak blocking for 380-415V-class lines and noisier mains, with the same phase-control behavior as the 3021.

600V peak against the 400V class of the 302x - the reason it exists.

Compatibility & Drop-In Notes: Match the voltage class to the actual line and transient environment: on 415V three-phase-derived circuits and noisy industrial mains, the 600V part is the honest choice and the 400V one is a countdown.
Package & Solder Footprint: DIP-6 standard pinout.
Shenzhen Warehouse Stock & MOQ: Stocked for industrial phase-control repairs.
Request Volume Quote for MOC3052 Compare MOC3023SR2M vs MOC3052 Spec Matrix
MOC3063 onsemi / Lite-On DIP-6
Functional Equivalent
Availability & Target Pricing:

Zero-Cross at 600V

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

Zero-cross switching at 600V peak and 5mA trigger - the sensitive end of both ladders at once.

600V class for higher-voltage on/off switching.

Compatibility & Drop-In Notes: Same zero-cross rule applies: on/off duty only. Grade and voltage both matter - read both from the orderable number.
Package & Solder Footprint: DIP-6 standard pinout.
Shenzhen Warehouse Stock & MOQ: Stocked with the rest of the 30xx row.
Request Volume Quote for MOC3063 Compare MOC3023SR2M vs MOC3063 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • Decide the duty before the part number: phase control (dimmers, speed) takes random-phase (MOC302x / MOC3052); on/off switching takes zero-cross (MOC304x / MOC3063). Mixing the duty and the detector is the most common appliance-board repair mistake.
  • Within a family only the trigger current changes: 30mA / 15mA / 10mA / 5mA across the 3020-3023 ladder (and 3041-3043). Substitute toward more sensitivity freely; toward less only with the drive current verified cold.
  • Voltage classes: 250V (301x), 400V (302x / 304x), 600V (3052 / 3063). Mains transients decide the class, not the nominal line voltage.
  • The optotriac drives a power triac - it never carries the load. In field failures, check the power triac and the snubber network before condemning the coupler: it is usually the messenger.
  • dv/dt ratings differ by an order of magnitude between the random-phase and zero-cross families: replacing a zero-cross part with a random-phase one in an inductive-load circuit invites false triggering.
  • Gate resistor sizing is per-grade: the resistor that fed 15mA of LED current wastes efficiency with a 5mA part and starves a 30mA part - match the letter to the circuit.
Frequently Asked Technical Questions

Q: Can MOC3041 replace MOC3021?

A: Functionally it triggers and isolates, but the behavior changes: the 3041 is zero-cross, so phase-control circuits (dimmers) lose their firing-angle control and act as on/off switches. Match the family to the duty first; the pinout will agree either way.

Q: What do the numbers after MOC30 mean?

A: The LED trigger current grade: 3020 is 30mA, 3021 15mA, 3022 10mA, 3023 5mA; the 304x zero-cross series repeats the ladder. More-sensitive grades substitute upward; check drive current before substituting downward.

Q: Why does my dimmer only work at full brightness after a repair?

A: A zero-cross part (MOC304x) was likely fitted where a random-phase part (MOC302x) belonged - the zero-cross detector refuses to trigger at low conduction angles. Match the family letter: 302x for phase control.

Technical Details & Description

Triac driver for line-voltage loads without zero-cross delay

The MOC3023SR2M is a 1-channel triac-output optoisolator from onsemi with a 4170 Vrms isolation rating and a 400 V off-state voltage capability. The non-zero-crossing output means the internal triac fires immediately when the LED is pulsed — no wait for the next AC zero crossing. This makes it the right choice for phase-control dimming, random-turn-on switching, or any load where you need to start conducting mid-cycle.

LED drive margin and trigger current

A 3.3 V logic output driving through a 390 Ω series resistor delivers about 5.5 mA — enough to guarantee turn-on across temperature. The maximum continuous LED current is 60 mA, so there is headroom for higher drive if the MCU port can source it, but the 5 mA threshold is the design target.

The 6-SMD gull-wing package with surface-mount mounting keeps assembly compatible with standard reflow profiles.

Frequently asked questions

Is MOC3023SR2M compatible with 230 VAC loads?

Yes. The off-state voltage rating is 400 V, which comfortably exceeds the 325 V peak of a 230 VAC line. The 4170 Vrms isolation provides the safety barrier between the low-voltage control side and the mains side.

What is the difference between MOC3023 and MOC3022?

The primary difference is the LED trigger current (Ift) maximum: the MOC3023SR2M specifies 5 mA max, while the MOC3022SR2M specifies 10 mA max. The lower trigger current of the MOC3023 allows it to be driven by weaker logic outputs or higher-value series resistors.

What is the footprint of MOC3023SR2M?

The package is 6-SMD with gull-wing leads, supplier device package 6-SMD. The standard footprint matches a 6-pin DIP surface-mount pattern with 2.54 mm (0.100 inch) lead spacing. Confirm the land pattern against the onsemi datasheet for your specific PCB layout.

MOC3023SR2M
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