STMicroelectronics BTB16-800BRG

Overview

BTB16-800BRG from STMicroelectronics is a 16 A, 800 V RMS insulated triac in TO-220AB package, designed for mains AC switching in phase-angle and on/off control. It features 50 mA gate trigger current (IGT), 2500 VRMS insulated tab, and high commutation capability (4Q) without snubber circuitry-enabling direct use with inductive loads such as universal motors and solenoids in appliance motor speed controllers.

For engineers reviewing the BTB16-800BRG datasheet, BTB16-800BRG pinout, BTB16-800BRG application, or BTB16-800BRG equivalent, this part supports thermal design with Rth(j-c) = 2.1 °C/W, meets UL1557 certification (file E81734), and delivers verified dV/dt immunity of 400 V/µs at 125 °C-critical for reliable operation in noisy industrial AC environments.

Technical Context

This triac operates in all four quadrants (4Q), supporting gate-triggered conduction regardless of polarity between MT2 and MT1. Its insulated TO-220AB package enables direct heatsink mounting without isolation hardware while maintaining 2500 VRMS creepage/clearance compliance per UL1557.

It sustains non-repetitive surge current up to 168 A (60 Hz, 16.7 ms) and exhibits low on-state voltage (VTM ≤ 1.55 V at 22.5 A, 25 °C) with dynamic resistance RD ≤ 25 mΩ at 125 °C-ensuring minimal conduction loss under sustained load conditions.

Key Specifications

Pinout & Package

BTB16-800BRG uses an insulated TO-220AB package with three terminals: MT1 (Main Terminal 1), MT2 (Main Terminal 2), and G (Gate). The metal tab is electrically isolated from the die and rated for 2500 VRMS, allowing direct mechanical attachment to grounded heatsinks without additional insulation hardware.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTA16-800BRG, BTB16-800BRG offers identical electrical ratings but optimized gate drive robustness in Quadrant IV; versus BTB16-800BW, it provides certified insulation-eliminating design risk in safety-critical, grounded-chassis applications.

Availability

BTB16-800BRG is available at Aetrix Electronics and suitable for universal motor speed control, static relay implementation, induction cooktop power stages, and industrial heater on/off switching requiring stable component supply across multi-year production cycles.

Supply support for BTB16-800BRG 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

BTB16-800BRG belongs to ST's high-reliability triac product line engineered specifically for robust AC mains switching in safety-critical, thermally constrained, and EMI-sensitive applications-including white goods, HVAC, and industrial controls.

FAQ

What is the maximum allowable case temperature for continuous 16 A RMS operation?

BTB16-800BRG supports 16 A RMS continuous current at a maximum case temperature (Tc) of 86 °C, as specified in Table 1 of DS2114 Rev 11. This limit assumes proper heatsinking with thermal interface material and accounts for the insulated TO-220AB package's Rth(j-c) = 2.1 °C/W. Exceeding 86 °C requires derating per Figure 3 in the datasheet.

Does BTB16-800BRG require a snubber circuit when driving inductive loads?

No-BTB16-800BRG is a Snubberless™ triac with verified 4-quadrant commutation performance, including 400 V/µs dV/dt immunity at 125 °C. It is qualified for direct inductive load switching (e.g., universal motors) without external RC snubbers, as confirmed in the "Snubberless versions" application note section and Table 4 of DS2114.

Is the metal tab electrically connected to any internal semiconductor node?

No-the tab is fully insulated from the die and rated for 2500 VRMS isolation per UL1557 (file E81734). It serves solely as a thermal path and may be safely bolted to a grounded heatsink without risk of short circuit or safety violation, unlike non-insulated TO-220AB variants such as BTB16-800BW.

Can BTB16-800BRG be driven directly by a 3.3 V microcontroller GPIO?

No-its gate trigger current requirement is 50 mA in Quadrant IV, exceeding typical GPIO sink/source capability (usually ≤20 mA). A discrete transistor buffer (e.g., BC817) or dedicated triac driver IC (e.g., MOC3021) is required to deliver sufficient gate charge while providing zero-crossing synchronization and isolation.