STMicroelectronics BTW68-600RG

Overview

BTW68-600RG from STMicroelectronics is a 600 V, 30 A RMS insulated TRIAC in TOP3 package, designed for high-power AC switching in solid-state relays and industrial motor drives. It delivers 420 A non-repetitive surge current (8.3 ms), 2500 VRMS galvanic isolation per UL E81734, and 1.1 °C/W junction-to-case thermal resistance for robust thermal management in welding equipment and UPS systems.

For engineers reviewing the BTW68-600RG datasheet, BTW68-600RG pinout, BTW68-600RG application, or BTW68-600RG equivalent, key selection criteria include verified 50 mA gate trigger current, 2.1 V on-state voltage at 60 A, 500 V/µs dV/dt immunity at 125 °C, and UL-certified insulation integrity under continuous industrial duty cycles.

Technical Context

This insulated TRIAC operates in bidirectional conduction mode with gate-triggered latching behavior, supporting phase-angle control and zero-crossing switching topologies. Its internal ceramic pad enables 2500 VRMS isolation between MT1/MT2 terminals and case, meeting UL 2500 V requirements without external insulation barriers.

The device features 100 A/µs critical di/dt rating at 125 °C with 2×IGT gate drive, ensuring reliable turn-on under high dv/dt noise conditions in variable-speed motor inverters. Thermal performance is defined by Rth(j-c) = 1.1 °C/W, enabling 30 A RMS operation at Tc = 80 °C without forced cooling.

Key Specifications

Pinout & Package

BTW68-600RG uses the TOP3 insulated package: epoxy body (UL94 V0), lead-free terminations, and integrated ceramic insulating pad between die and metal baseplate. Mounting torque: 1.05 N·m (max 1.2 N·m).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC power switching applications.

Compared with T635-600G and Q6035LH5, BTW68-600RG uniquely combines UL-certified 2500 VRMS insulation, 50 mA gate sensitivity, and 30 A RMS rating in a compact TOP3 form factor-making it optimal for space-constrained, safety-compliant industrial AC switches where gate drive simplicity and regulatory certification are mandatory.

Availability

BTW68-600RG is available at Aetrix Electronics and suitable for solid-state relays, battery charging systems, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and UL-certified isolation integrity.

Supply support for BTW68-600RG 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The BTW68 series belongs to ST's high-power insulated thyristor product line, engineered specifically for industrial AC power control applications demanding certified galvanic isolation, high surge tolerance, and thermal reliability in harsh operating environments.

FAQ

What is the maximum case temperature for continuous 30 A RMS operation?

BTW68-600RG supports 30 A RMS continuous conduction at a case temperature (Tc) of 80 °C, as specified in Table 1 of DS6910 Rev 4. Exceeding this temperature requires derating per Figure 3, which shows average on-state current decreasing linearly to 0 A at Tc = 125 °C. Thermal design must maintain baseplate temperature ≤80 °C under worst-case ambient and airflow conditions.

Does BTW68-600RG require a heat sink in typical applications?

Yes - the 1.1 °C/W junction-to-case thermal resistance necessitates a properly sized heat sink to dissipate up to 63 W (30 A × 2.1 V) of on-state power loss. Without forced air, a minimum 150 cm² aluminum finned heatsink is required to hold Tc ≤80 °C at full load. The insulated TOP3 package allows direct mounting to grounded chassis without additional isolation hardware.

Can BTW68-600RG be used in zero-crossing switching configurations?

Yes - its 50 mA gate trigger current and 100 µs turn-off time (tq) support reliable zero-crossing operation when paired with standard zero-crossing optocouplers (e.g., MOC3063). However, the device itself does not integrate zero-crossing detection; external timing circuitry or controller synchronization is required to gate the TRIAC precisely at voltage zero crossings.

Is BTW68-600RG compliant with RoHS and REACH regulations?

Yes - BTW68-600RG is manufactured in STMicroelectronics' ECOPACK®-compliant process, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The TOP3 package is lead-free, and material declarations are available through ST's official product page and compliance portal using order code BTW68-600RG.