STMicroelectronics BTW68-1000RG

Overview

BTW68-1000RG from STMicroelectronics is a 1000 V, 30 A RMS insulated TRIAC designed for high-power AC switching in solid-state relays, UPS systems, and industrial welding equipment. It features 50 mA gate trigger current, 2500 VRMS UL-rated insulation (E81734), and 420 A non-repetitive surge current handling with clip-assembly construction.

For engineers reviewing the BTW68-1000RG datasheet, BTW68-1000RG pinout, BTW68-1000RG application, or BTW68-1000RG equivalent, key selection criteria include blocking voltage rating (1000 V), RMS on-state current (30 A), gate sensitivity (50 mA), thermal resistance (1.1 °C/W), and UL-certified isolation performance.

Technical Context

This device operates as a bidirectional thyristor with symmetrical forward/reverse blocking capability up to 1000 V (VDRM/VRRM). Its gate-triggering behavior is characterized by IGT = 50 mA (max), VGT ≤ 1.5 V, and dV/dt immunity ≥ 250 V/µs at 125 °C - enabling reliable turn-on under noisy industrial AC line conditions.

The TOP3 insulated package integrates a ceramic insulating pad delivering 2500 VRMS isolation and Rth(j-c) = 1.1 °C/W, supporting high-power dissipation in compact layouts. Surge robustness is confirmed by ITSM = 400 A (10 ms) and I²t = 800 A²s, critical for motor-start and welder-duty cycling.

Key Specifications

Pinout & Package

The BTW68-1000RG uses the TOP3 insulated package: epoxy-molded, lead-free, UL94 V0 compliant, with M3.5 mounting screw (max torque 1.2 N·m). Dimensions: 21.1 × 15.5 × 4.6 mm (L × W × H), weight 4.5 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage, insulated TRIAC applications.

Compared with T635-1000G and Q6030JH5, BTW68-1000RG uniquely combines UL2500 V isolation, clip-assembly surge robustness, and 400 A/10 ms surge rating - making it optimal for safety-critical, high-cycle industrial AC switching where board-level isolation and thermal reliability are mandatory.

Availability

BTW68-1000RG is available at Aetrix Electronics and suitable for solid-state relays, uninterruptible power supplies, and industrial welding systems requiring stable component supply, long-term lifecycle support, and UL-certified isolation integrity.

Supply support for BTW68-1000RG 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 BTW68 series belongs to ST's high-power insulated thyristor product line, engineered specifically for ruggedized AC power control in safety-regulated industrial equipment where isolation, surge resilience, and thermal stability are non-negotiable.

FAQ

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

The BTW68-1000RG supports 30 A RMS conduction at Tc = 80 °C, as specified in its absolute maximum ratings. Exceeding this requires derating per Figure 3 in DS6910 - e.g., at 100 °C case temperature, max IT(RMS) drops to ~22 A. Thermal design must maintain junction temperature ≤125 °C using the stated Rth(j-c) = 1.1 °C/W.

Does BTW68-1000RG require a heat sink, and what mounting torque is recommended?

Yes - a heatsink is mandatory for any sustained current >5 A due to its 1.1 °C/W junction-to-case thermal resistance. The TOP3 insulated package uses an M3.5 screw; ST specifies 1.05 N·m nominal torque (maximum 1.2 N·m) to ensure mechanical stability and optimal thermal contact without cracking the epoxy body or ceramic insulator.

Can BTW68-1000RG be used in zero-crossing switching applications?

Yes - its 50 mA gate trigger current and 2.1 V on-state voltage at 60 A allow reliable synchronization with zero-crossing detection circuits. However, it is not inherently zero-crossing; external control logic (e.g., optocoupler + microcontroller) must generate gate pulses aligned to voltage zero crossings to minimize EMI and inrush stress.

Is BTW68-1000RG RoHS-compliant and halogen-free?

Yes - BTW68-1000RG is manufactured in ST's ECOPACK2-compliant process: lead-free, RoHS-compliant, and halogen-free per IEC 61249-2-21. This is confirmed in Section 2 of DS6910 Rev 4, which states "ECOPACK specifications… are available at www.st.com" and references compliance with JEDEC J-STD-609A Class 2a for moisture sensitivity.