FODM3051R4

Triac, SCR Output Optoisolators Overview

The FODM3051R4 is a triac and SCR output optoisolator manufactured by onsemi. It features a phototriac output with an insulation voltage of 3750 Vrms. The device operates without a zero-crossing circuit, making it suitable for random phase applications. Key electrical parameters include a maximum continuous output current of 70 mA and a blocking voltage (Vdrm) of 600 V. The forward current is rated at 60 mA with a forward voltage of 1.2 V. Power dissipation is limited to 300 mW. The component supports a wide operating temperature range from -40°C to +100°C and is housed in a 4-SMD MiniFlat package.

Triac, SCR Output Optoisolators Feature Summary

• Provides high-voltage isolation between control circuits and triac/SCR loads via optical coupling.
• Designed for random phase triggering applications without integrated zero-crossing detection.
• Capable of driving high-power AC loads with specified peak current and blocking voltage ratings.

Triac, SCR Output Optoisolators Applications

• Solid-state relay drivers
• AC motor speed control systems
• Industrial process control isolation

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'R4' against the manufacturer's latest documentation to confirm availability status and tape-and-reel specifications. Ensure that the MiniFlat package dimensions align with the target PCB footprint requirements. Cross-reference the datasheet revision date to validate all electrical limits and thermal characteristics before finalizing the design.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random phase firing is required for AC load control. The absence of zero-crossing logic allows for precise phase-angle control but requires careful snubber design to prevent false triggering. Consider the 3750 Vrms isolation rating for safety compliance in mains-connected applications. Evaluate the thermal performance within the enclosure to ensure power dissipation remains within the 300 mW limit under worst-case conditions.

Triac, SCR Output Optoisolators Part Context

This part belongs to the family of triac output optoisolators designed for industrial isolation. It serves as a bridge between low-voltage digital control signals and high-voltage AC power stages. The MiniFlat package offers a compact solution for space-constrained designs while maintaining robust electrical isolation standards required in modern power electronics.

Triac, SCR Output Optoisolators Replacement Considerations

The FODM3051R4 is listed as obsolete. Public confirmed substitute part numbers include the FODM3052-NF098, which shares similar triac output characteristics and pinout compatibility. Verify functional equivalence regarding isolation voltage and current ratings before substitution.

Triac, SCR Output Optoisolators FAQ

Does the FODM3051R4 include a zero-crossing detector?

No, the FODM3051R4 does not include a zero-crossing circuit. It is designed for random phase triggering applications where the output turns on immediately upon receiving an input signal.

What is the maximum isolation voltage of the FODM3051R4?

The maximum isolation voltage is 3750 Vrms, providing robust protection between the input control side and the output triac side.