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MOC3083

Zero-crossing triac driver optocoupler, 800V, 5mA IFT, 4170Vrms isolation, 6-DIP

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Manufacturer Part：

MOC3083

Package：

6-Pin DIP (8.51 x 6.35 mm, 2.54 mm pitch)

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Description

Product Overview

The onsemi MOC3083 is a zero-crossing triac driver optocoupler with 800 V peak blocking voltage, designed to interface logic systems with 240 VAC power lines. Packaged in a 6-pin DIP, it provides 4170 Vrms isolation, zero-voltage crossing detection, and a low 5 mA LED trigger current for reliable and noise-minimized AC power control.

Key Specifications

Peak Blocking Voltage 800 V
LED Trigger Current (IFT) 5 mA max
Isolation Voltage 4170 Vrms
Static dv/dt 600 V/µs min
Operating Temperature -40°C to +85°C
Package 6-Pin DIP

Features

  • Zero-voltage crossing to minimize EMI
  • 800 V peak blocking voltage for 240 VAC operation
  • Low trigger current: 5 mA max
  • High static dv/dt: 600 V/µs guaranteed
  • UL1577 approved (4170 Vrms isolation)
  • DIN EN/IEC60747-5-5 safety rated

Applications

  • Solid-state relays
  • Industrial solenoid and valve controls
  • Lighting control systems
  • AC motor starters and temperature controls
  • Electromagnetic contactor drivers

The MOC3083 from onsemi is a 6-pin DIP zero-crossing triac driver optocoupler designed for interfacing logic-level control circuits to AC power loads. It consists of a GaAs infrared LED optically coupled to a monolithic silicon detector incorporating a zero-voltage crossing bilateral triac driver. The zero-crossing feature ensures the triac is triggered only when the AC line voltage is near zero, minimizing conducted and radiated EMI and reducing inrush current stress on the load. With 800 V peak blocking voltage and 600 V/µs static dv/dt, the MOC3083 provides robust and reliable performance for 240 VAC line control applications.

The MOC3083 comprises an infrared LED and a photo-detecting zero-crossing triac driver on the output side. When current flows through the input LED (5 mA minimum to trigger), infrared light illuminates the photodetector. The zero-crossing detection circuit on the output side monitors the AC line voltage and only allows the triac driver to trigger when the line voltage is within approximately ±20 V of zero. This zero-crossing behavior minimizes the rate of change of load current (di/dt), reducing EMI generation and preventing false triggering from line noise. The output triac driver then provides gate current to an external power triac, which directly controls the AC load. The optical isolation of 4170 Vrms ensures safe separation between the low-voltage logic side and the high-voltage AC power side.

Pin Name Type Function
1 Anode Input LED anode
2 Cathode Input LED cathode
3 NC – No connect (do not connect)
4 Main Terminal Output Triac driver main terminal
5 NC / Substrate – No connect (triac substrate)
6 Main Terminal Output Triac driver main terminal
  • Solid-state relay (SSR) control for 240VAC loads
  • Industrial solenoid and valve driver interfaces
  • Dimming and on/off lighting control systems
  • AC motor soft-start and temperature controllers
  • Electromagnetic contactor drive circuits
Manufacturer Part Number Block Voltage IFT Notes
onsemi MOC3081M 800 V 15 mA Higher trigger current
onsemi MOC3082M 800 V 10 mA Medium trigger current
Vishay MOC3083M 800 V 5 mA Equivalent part
onsemi MOC3043M 400 V 5 mA Lower voltage version
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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