STMicroelectronics BTA16-800BRG

Overview

BTA16-800BRG from STMicroelectronics is an insulated, 16 A, 800 V RMS snubberless triac in TO-220AB Insulated package, rated for 2500 VRMS isolation, with 50 mA gate trigger current (IGT), 200 V/µs dV/dt immunity at 125 °C, and 50 A/µs critical di/dt rating - used for phase-angle control in AC motor speed controllers driving inductive loads.

For engineers reviewing the BTA16-800BRG datasheet, BTA16-800BRG pinout, BTA16-800BRG application, or BTA16-800BRG equivalent, key selection criteria include insulated tab compliance (UL1557), high commutation capability on inductive loads, thermal resistance (Rth(j-c) = 2.1 °C/W), and Snubberless™ operation eliminating external snubbers in motor and dimmer circuits.

Technical Context

This triac operates in four quadrants (4Q) with standard triggering but delivers enhanced commutation robustness via internal design optimized for inductive load turn-off without snubbers. Its insulated ceramic pad enables safe mounting to heatsinks without additional isolation hardware.

The device features a low dynamic on-state resistance (25 mΩ at 125 °C) and threshold voltage (0.85 V), enabling low conduction losses at full 16 A RMS. Junction temperature range spans −40 to +125 °C, supporting industrial ambient conditions.

Key Specifications

Pinout & Package

TO-220AB Insulated package with metal tab electrically isolated from the die by internal ceramic layer; mounting screw torque: 0.55 N·m (recommended), 0.70 N·m (max).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTA16-800BW, this part offers lower dV/dt immunity but identical isolation and thermal performance; versus BTB16-800BRG, it provides certified 2500 VRMS insulation - critical for safety-critical or space-constrained designs where heatsink contact is unavoidable.

Availability

BTA16-800BRG is available at Aetrix Electronics and suitable for AC motor control, lighting dimming, static relay modules, and heating regulation requiring stable component supply and UL-certified isolation.

Supply support for BTA16-800BRG 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The BTA series belongs to ST's high-reliability power discrete portfolio, engineered specifically for robust AC mains switching in safety-critical and thermally demanding applications.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA16-800BRG has a specified operating junction temperature range of −40 to +125 °C. Continuous operation must maintain Tj ≤ 125 °C, achievable with proper heatsinking - at Tc = 86 °C, IT(RMS) = 16 A is supported per datasheet Figure 3.

Can this triac replace a non-insulated triac in an existing design?

Yes, but only if the mechanical layout accommodates the insulated tab and mounting requirements. The TO-220AB Insulated package has identical outline dimensions to standard TO-220AB, but the tab is electrically isolated - eliminating need for mica washers or silicone pads, though screw torque must remain within 0.55–0.70 N·m.

Does BTA16-800BRG require a snubber circuit?

No - it is a Snubberless™ triac with high commutation capability (4Q), validated for inductive load turn-off without external RC snubbers. This is confirmed by its 200 V/µs dV/dt rating and UL1557-certified insulation, enabling simplified, higher-reliability designs.

How does the insulated tab affect thermal performance?

The insulated tab increases junction-to-case thermal resistance to 2.1 °C/W (vs. 1.2 °C/W for non-insulated TO-220AB), meaning slightly higher junction temperature at same power dissipation. However, the ceramic layer maintains full thermal conduction - heatsink interface remains effective, and derating is explicitly defined in Figure 3 of DS2114.