STMicroelectronics BTB10-800CWRG

Overview

BTB10-800CWRG from STMicroelectronics is a 10 A, 800 V Snubberless™ triac in insulated TO-220AB package, rated for 2500 VRMS isolation, designed for reliable AC mains switching on inductive loads without external snubbers. It delivers 500 V/µs dV/dt immunity and 5.5 A/ms critical commutation (dI/dt)c at 125 °C, enabling use in motor speed controllers and static relays.

For engineers reviewing the BTB10-800CWRG datasheet, BTB10-800CWRG pinout, BTB10-800CWRG application, or BTB10-800CWRG equivalent, this page provides verified thermal resistance (Rth(j-c) = 2.4 °C/W), gate trigger current (IGT ≤ 35 mA), insulated tab compliance (UL1557 E81734), and Snubberless™ 3-quadrant operation details essential for inductive load design.

Technical Context

This triac operates in three quadrants (I, II, III) with no gate sensitivity in quadrant IV, eliminating false triggering from noise on inductive loads. Its internal ceramic insulation enables safe high-voltage isolation between main terminals and heatsink, supporting UL-compliant 2500 VRMS creepage/clearance requirements.

The device uses a robust silicon structure optimized for high commutation performance: minimum dV/dt = 500 V/µs and (dI/dt)c = 5.5 A/ms at Tj = 125 °C ensure reliable turn-off under reactive load conditions without snubber networks.

Key Specifications

Pinout & Package

BTB10-800CWRG uses an insulated TO-220AB package with metal tab electrically isolated from the main terminals. The tab serves as mechanical mounting surface and thermal path only - no electrical connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac-based AC switching applications.

Compared with BTA10-800CWRG and T1035-8G, BTB10-800CWRG uniquely combines certified 2500 VRMS isolation, through-hole mounting, and Snubberless™ 3Q operation-making it optimal for safety-critical, thermally demanding, inductive-load applications where mechanical heatsinking is preferred.

Availability

BTB10-800CWRG is available at Aetrix Electronics and suitable for industrial motor controls, appliance safety-critical switching, and commercial heating systems requiring stable component supply and long-term lifecycle support.

Supply support for BTB10-800CWRG 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 automotive, industrial, and consumer markets.

BTB10-800CWRG belongs to ST's high-reliability Snubberless™ triac product line, engineered specifically for robust AC mains switching in safety-certified appliances and industrial equipment with inductive loads.

FAQ

What is the maximum case temperature for continuous 10 A operation?

Per DS3165 Rev 9 Figure 3, BTB10-800CWRG supports 10 A RMS at Tc ≤ 95 °C in insulated TO-220AB configuration. Exceeding this requires derating; at Tc = 100 °C, IT(RMS) drops to ~9.2 A. Thermal design must account for Rth(j-c) = 2.4 °C/W and ambient-to-case path resistance.

Does the insulated tab require special mounting hardware?

Yes - the tab must be mounted to a heatsink using non-conductive hardware (e.g., nylon screws, mica washers, or silicone thermal pads) to maintain 2500 VRMS isolation. Conductive fasteners or thermal paste alone will compromise UL1557 compliance and create shock hazard.

Can BTB10-800CWRG replace a standard 4Q triac in existing designs?

Only if the application operates exclusively in quadrants I, II, and III - BTB10-800CWRG has no gate sensitivity in quadrant IV. Circuits relying on Q4 triggering (e.g., some legacy light dimmers) will fail; verify gate drive polarity and load characteristics before substitution.

What is the minimum gate trigger pulse width required?

DS3165 specifies IGT test condition with tp = 20 µs, and the device reliably triggers with ≥10 µs pulses at ≥35 mA. For margin, use ≥20 µs pulses synchronized to zero-crossing; shorter pulses risk incomplete turn-on, especially at low Tj or high dV/dt stress.