STMicroelectronics

TN805-600B

TN805-600B Description

The TN805-600B is a 600V, 8A (RMS) standard recovery SCR (Silicon Controlled Rectifier) from STMicroelectronics, designed for high-voltage switching applications. Packaged in a DPAK (TO-252) surface-mount form factor, this device offers robust performance with a low gate trigger voltage (Vgt) of 1.3V max and a hold current (Ih) of 25mA max, ensuring reliable triggering and latching. Its low on-state voltage (Vtm) of 1.6V max minimizes power dissipation, while the off-state leakage current (5 µA max) enhances efficiency. The TN805-600B is RoHS3 compliant and REACH unaffected, making it suitable for environmentally conscious designs.

TN805-600B Features

• High Voltage Rating: 600V off-state voltage for robust performance in high-voltage circuits.
• High Surge Current Capability: Supports non-repetitive surge currents of 70A (50Hz) and 73A (60Hz), ensuring resilience against transient overloads.
• Low Trigger Requirements: Gate trigger current (Igt) of 5mA max and 1.3V gate trigger voltage (Vgt) for easy drive compatibility.
• Efficient Power Handling: On-state current (It(AV)) of 5A and RMS current of 8A, with low 1.6V Vtm for reduced conduction losses.
• Surface-Mount Design: DPAK package enables compact PCB layouts and automated assembly.
• Reliability: MSL 1 (Unlimited) moisture sensitivity ensures long-term storage stability.

TN805-600B Applications

• AC Power Control: Ideal for motor drives, lighting controls, and industrial AC switches due to its high voltage and surge tolerance.
• Surge Protection: Suitable for crowbar circuits and overvoltage protection in power supplies.
• Energy Management: Used in solid-state relays (SSRs) and heating control systems for efficient power regulation.
• Consumer Electronics: Applicable in appliance controls where compact, high-voltage switching is required.

Conclusion of TN805-600B

The TN805-600B is a high-performance SCR optimized for high-voltage, medium-current switching with excellent surge resilience and low triggering requirements. Its surface-mount DPAK package and low power dissipation make it ideal for modern, space-constrained designs. While marked as obsolete, it remains a reliable choice for legacy systems or applications requiring proven SCR performance. Engineers seeking a balance of voltage handling, surge robustness, and efficiency will find this SCR well-suited for industrial, consumer, and power control applications.