TN805-600B

Scrs Overview

The TN805-600B is an 8 A, 600 V standard gate Silicon Controlled Rectifier (SCR) manufactured by STMicroelectronics. It operates in a TO-252 surface-mount package with three pins. Key electrical parameters include a maximum DC gate trigger current of 5 mA and a maximum DC gate trigger voltage of 1.5 V. The device features a critical rate of rise of off-state voltage of 50 V/µs and a maximum holding current of 20 mA. It supports a junction temperature range from -40°C to 125°C and complies with RoHS standards.

Scrs Feature Summary

• Standard gate triggering level for robust control applications
• Surface-mount TO-252 package for space-constrained designs
• High thermal stability with extended operating temperature range

Scrs Applications

• Overvoltage crowbar protection circuits
• Motor control in power tools and kitchen aids
• Inrush current limiting circuits
• Capacitive discharge ignition systems
• Voltage regulation circuits

Scrs Procurement Notes

Verify the manufacturer origin carefully as multiple vendors list this part number. Confirm the specific gate sensitivity matches the design requirements, distinguishing it from sensitive gate variants like the TS820 series. Ensure the TO-252 package footprint aligns with the PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Scrs Selection Notes

Select the TN805-600B when a standard gate SCR is required rather than a sensitive gate type. It is suitable for applications needing higher gate drive currents compared to sensitive variants. Consider the TO-252 package for automated surface-mount assembly. Evaluate the 8 A RMS current rating against the load requirements and ensure the 600 V blocking voltage exceeds the peak circuit voltage.

Scrs Part Context

This component belongs to the STMicroelectronics 8 A SCR series, which includes both sensitive (TS8) and standard (TN8/TYN) gate options. The series is designed for versatile control modes in industrial and consumer electronics. The TN8 variant specifically targets applications where standard gate triggering provides better noise immunity or compatibility with existing drive circuits compared to sensitive gates.

Scrs Replacement Considerations

The TS820-600B is a sensitive gate alternative within the same current and voltage class. Verify that the lower gate trigger current of the TS820 does not cause unintended triggering in the target circuit. Other standard gate SCRs from different manufacturers may require verification of pinout and thermal characteristics.