HT5761RP

Overview

The Littelfuse HT5761RP is a bidirectional trigger diode (DIAC) from the HT series, housed in a DO-35 glass package. It features a breakover voltage range of 28V to 36V and a breakover current of 15 μA. The device supports a pulse on-state current of 2A at 40°C with a 10μs pulse width. Operating junction temperature ranges from -40°C to +125°C, with storage temperatures spanning -40°C to +125°C. Power dissipation is rated at 250mW between -40°C and +40°C, derating by 3.6mW/°C above 40°C. Breakover voltage symmetry is specified at 2V.

Feature Summary

• Bidirectional triggering capability for both voltage polarities
• High reliability through robust junction construction
• Lead-free termination compatible with RoHS standards

Applications

• Phase control circuits for lamp dimming
• Universal motor speed control systems
• Heat control applications
• Solid state ballast lighting controls

Procurement Notes

Verify the specific ordering suffix RP indicates tape and reel packaging rather than bulk supply. Confirm the DO-35 package type matches the required footprint. Ensure the breakover voltage tolerance aligns with circuit design requirements before finalizing procurement orders.

Selection Notes

Select this component when a standard DIAC with a 28V to 36V breakover range is required. Consider the DO-35 package size for through-hole mounting constraints. Evaluate thermal derating curves if operating ambient temperatures exceed 40°C to ensure power dissipation limits are not exceeded during continuous operation.

Part Context

This part belongs to the HTxxx & HTMxxx & STxxx Series of standard bidirectional trigger diodes. These devices are designed to trigger triacs and SCRs in phase control applications. The series offers various voltage characteristics ranging from 27V to 70V across different package options including MINIMELF, DO-35, and DO-214.

Replacement Considerations

Check for other parts within the HT5761A or HT5762 variants if slightly different breakover voltages are acceptable. Verify that substitute components maintain the same DO-35 package dimensions and lead spacing to ensure mechanical compatibility without PCB modifications.