BT145-800RTQ

Scrs Overview

The BT145-800RTQ is a planar passivated Silicon Controlled Rectifier (SCR) manufactured by WeEn Semiconductors. It is housed in a SOT78 (TO-220AB) plastic package designed for through-hole mounting. The device features an 800 V repetitive peak reverse and direct off-state voltage rating, supporting high bidirectional blocking voltage capability. It handles a maximum RMS on-state current of 25 A and a non-repetitive peak on-state current of 300 A. The gate trigger current is limited to a maximum of 10 mA, ensuring compatibility with various driver circuits. The component operates within a junction temperature range up to +150 °C.

Scrs Feature Summary

• Planar passivated silicon construction providing enhanced voltage ruggedness and long-term reliability under harsh electrical conditions.
• High bidirectional blocking voltage capability suitable for demanding AC power switching applications requiring robust insulation.
• High current inrush capability allowing the device to withstand significant transient surge currents during startup or fault conditions.
• Optimized thermal cycling performance ensuring stable operation and durability in environments subject to frequent temperature fluctuations.

Scrs Applications

• Industrial motor control systems requiring reliable high-current switching
• Solid-state relays designed for heavy-duty AC load management
• Power supply units utilizing SCR-based rectification or regulation
• General industrial automation equipment needing durable semiconductor switches

Scrs Procurement Notes

Verify the specific suffix RTQ against official manufacturer documentation to confirm the exact packing configuration and reel specifications. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Cross-reference the ordering part number with the latest datasheet revision to confirm compliance with current RoHS and REACH standards before finalizing purchase orders.

Scrs Selection Notes

Select this component when designing circuits that require a robust SCR with high bidirectional blocking voltage and substantial RMS current handling. The TO-220AB package facilitates effective heat dissipation for continuous high-current operations. Consider the low gate trigger current requirement for compatibility with standard logic-level drivers. Evaluate thermal management solutions based on the 150 °C maximum junction temperature limit to ensure system longevity.

Scrs Part Context

This device belongs to the broader family of planar passivated SCRs offered by WeEn Semiconductors. These components are engineered for industrial-grade applications where reliability and high voltage tolerance are critical. The TO-220AB packaging is a standard form factor widely used in power electronics for its mechanical stability and thermal performance, distinguishing it from smaller surface-mount alternatives.

Scrs Replacement Considerations

Consult official substitution guides for verified equivalents such as the BT145-800R or BT145X-800R. Confirm that alternative parts match the 800 V voltage rating, 25 A RMS current capacity, and TO-220 package dimensions. Verify pinout compatibility and thermal characteristics to ensure seamless integration without circuit redesign.

Scrs FAQ

What is the maximum gate trigger current specified for this SCR?

The maximum gate trigger current (Igt) is specified as 10 mA, which allows for efficient triggering with low-power drive circuits.

Does the BT145-800RTQ support bidirectional blocking voltage?

Yes, the device is designed with high bidirectional blocking voltage capability, rated at 800 V for both repetitive peak reverse and direct off-state voltages.

What is the maximum operating junction temperature for this component?

The maximum rated junction temperature (Tj max) for the BT145-800RTQ is +150 °C, allowing for operation in high-temperature industrial environments.