STMicroelectronics BTW67-200

Overview

BTW67-200 from STMicroelectronics is a 50 A RMS, 1000 V repetitive peak off-state voltage (VDRM/VRRM) insulated-packaged SCR thyristor in RD91 package, designed for high-power switching in solid-state relays, welding equipment, and motor control systems where surge current handling (610 A non-repetitive), low thermal resistance (1.0 °C/W), and 2500 VRMS insulation are critical.

For engineers reviewing the BTW67-200 datasheet, BTW67-200 pinout, BTW67-200 application, or BTW67-200 equivalent, key selection criteria include commutation capability, dV/dt immunity (≥1000 V/µs at 125 °C), gate trigger sensitivity (8–80 mA), on-state voltage (≤1.9 V @ 100 A), and insulated package compliance with UL 1557 (E81734).

Technical Context

This SCR operates as a latching unidirectional power switch triggered by a gate pulse, requiring no continuous gate drive once conducting. Its design emphasizes robust turn-on under high dv/dt stress (1000 V/µs min), low dynamic resistance (8.5 mΩ), and stable latching/holding behavior across -40 to +125 °C junction temperature range.

The RD91 insulated package uses clip bonding to minimize thermal resistance (1.0 °C/W j-c) and maximize surge current capacity (610 A, 8.3 ms sine). Insulation rating of 2500 VRMS supports isolation-critical industrial control architectures without external barriers.

Key Specifications

Pinout & Package

The BTW67-200 is housed in the RD91 insulated package - a stud-mount, epoxy-encapsulated, UL94 V0-compliant housing with integrated insulating barrier and M6 mounting thread (torque: 0.9–1.2 N·m). Thermal path is optimized via copper clip bonding directly to the die.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, insulated-package SCR applications.

Compared with L4008L5 and Q6050JH4TP, BTW67-200 delivers higher voltage margin (1000 V), superior surge capacity (610 A), and best-in-class thermal resistance (1.0 °C/W), making it optimal for 690 VAC motor starters and high-duty-cycle welding controls where reliability under transient stress is non-negotiable.

Availability

BTW67-200 is available at Aetrix Electronics and suitable for solid-state relays, resistance welding equipment, and high-power motor control systems requiring stable component supply, long-lifecycle support, and certified insulation integrity.

Supply support for BTW67-200 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The BTW67-200 belongs to ST's high-power insulated SCR product line, engineered specifically for industrial-grade AC power control where safety isolation, thermal robustness, and surge resilience are mandatory design requirements.

FAQ

What is the maximum allowable case temperature for continuous operation?

The BTW67-200 supports continuous operation up to 70 °C case temperature for its full 50 A RMS rating. Derating begins above this point: at 100 °C case, IT(AV) drops to ~20 A (180° conduction). Thermal design must maintain Tc ≤ 70 °C under worst-case ambient and airflow conditions to avoid exceeding junction limits.

Does BTW67-200 require a snubber circuit in inductive load applications?

Yes - a properly sized RC snubber is recommended when switching highly inductive loads (e.g., solenoids, transformers) to suppress voltage overshoot during turn-off. The device's 1000 V/µs dV/dt rating helps, but fast current decay can exceed this limit without snubbing, risking unintended commutation or failure.

Can BTW67-200 be used in phase-control dimming for resistive heating elements?

Yes - it is well-suited for phase-angle control of resistive loads up to 1000 V peak. Gate triggering must be synchronized to the AC line zero-crossing reference, and gate pulse width should exceed 50 µs to ensure reliable turn-on across temperature and aging. Avoid operation below 10% conduction angle to prevent excessive harmonic heating.

Is the RD91 package compatible with standard M6 heatsink mounting hardware?

Yes - the RD91 package features an M6 threaded stud with specified torque range of 0.9–1.2 N·m. It mates directly with industry-standard M6 washers, springs, and insulating sleeves. Mechanical drawings confirm compatibility with DIN 43650 and IEC 60112 creepage/clearance requirements for 2500 VRMS isolation.