FOD420V

Triac, SCR Output Optoisolators Overview

The FOD420V is a single-channel Triac and SCR output optocoupler manufactured by onsemi. It features a PhotoTriac output designed for random phase triggering applications without zero-crossing circuitry. The device provides high isolation with an insulation voltage of 5000 Vrms. Key electrical parameters include a maximum forward current of 30 mA, a forward voltage of 1.28 V, and a power dissipation rating of 500 mW. The output can withstand a maximum off-state voltage (VDRM) of 600 V. Triggering characteristics specify a maximum trigger current of 2 mA and a maximum turn-on time of 60 us. The component operates within a temperature range of -55°C to +100°C and is housed in a PDIP-6 through-hole package.

Triac, SCR Output Optoisolators Feature Summary

• Random phase triac output capability suitable for snubberless applications
• High isolation voltage rated at 5000 Vrms between input and output
• Non-zero crossing design allows triggering at any point in the AC cycle
• Robust thermal performance supporting operation up to 100°C

Triac, SCR Output Optoisolators Applications

• Solid-state relay control circuits
• AC motor speed control systems
• Lighting dimmer applications
• Industrial process control interfaces

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific ordering suffix to confirm the packaging type, as standard bulk packaging differs from tape-and-reel variants. Ensure that the selected variant matches the required mounting style, distinguishing between through-hole DIP packages and surface-mount options. Confirm RoHS compliance status directly with the manufacturer documentation prior to finalizing procurement orders to meet regulatory requirements.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random phase triggering is required rather than zero-crossing switching. The 600 V blocking voltage suits general purpose AC loads. Consider the 30 mA forward current limit for LED drive circuit design. Evaluate the 5000 Vrms isolation barrier for safety-critical interfaces. Compare against the FOD420SDV if surface-mount assembly is necessary instead of through-hole technology.

Triac, SCR Output Optoisolators Part Context

The FOD420V belongs to the FOD420 series of Triac and SCR output optocouplers from onsemi. This family focuses on providing reliable isolation for controlling thyristor-based loads. The device serves as a bridge between low-voltage control logic and high-voltage AC power stages. It replaces older discrete isolation solutions by integrating the optocoupler and triac driver into a single compact package.

Triac, SCR Output Optoisolators Replacement Considerations

The FOD420SDV is a confirmed substitute offering identical electrical specifications but in a surface-mount SMD-DIP-6 package. Verify pinout compatibility and mechanical footprint differences when transitioning between through-hole and surface-mount versions.