STMicroelectronics BTA06-400CRG

Overview

BTA06-400CRG from STMicroelectronics is a 6A, 400V RMS snubberless triac in insulated TO-220AB package, designed for AC phase control and ON/OFF switching in inductive loads. It features 5 mA logic-level gate trigger current (IGT), 2500 VRMS voltage-isolated tab per UL E81734, and 50 A non-repetitive surge rating - enabling use in motor speed controllers and heating regulation circuits.

For engineers reviewing the BTA06-400CRG datasheet, BTA06-400CRG pinout, BTA06-400CRG application, or BTA06-400CRG equivalent, key selection criteria include commutation robustness on inductive loads, gate sensitivity (5 mA IGT), insulated mounting capability, and snubberless operation at 125°C junction temperature.

Technical Context

This triac operates in three quadrants (I, II, III) with logic-level gate drive compatibility, eliminating need for external snubbers in inductive switching. Its high dV/dt immunity (400 V/µs min at 125°C) and critical commutation current (dI/dt ≥ 2.7 A/ms) ensure reliable turn-off under reactive load conditions.

The internal ceramic pad provides galvanic isolation between MT1/MT2 terminals and the metal tab, rated at 2500 VRMS. Thermal resistance from junction-to-case is 2.7 °C/W, supporting 6 A RMS conduction at Tc = 105°C without forced cooling.

Key Specifications

Pinout & Package

Package: TO-220AB insulated (metal tab electrically isolated from MT1/MT2, rated 2500 VRMS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB06-400CRG and BTA06-400CW, the BTA06-400CRG uniquely combines logic-level gate drive, snubberless operation, and certified tab isolation - making it optimal for compact, safety-compliant AC control where microcontroller integration and chassis mounting coexist.

Availability

BTA06-400CRG is available at Aetrix Electronics and suitable for motor speed control, heating regulation, static relay replacement, and light dimming requiring stable component supply across industrial and consumer production programs.

Supply support for BTA06-400CRG 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The BTA/BTB06 series belongs to ST's power discrete portfolio, engineered specifically for robust, cost-effective AC power control in safety-critical and thermally constrained applications.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA06-400CRG has an operating junction temperature range of –40°C to +125°C. For sustained 6 A RMS conduction, case temperature must be held at or below 105°C, as specified in Absolute Maximum Ratings Table 3. Derating is required above this temperature per Figure 2.

Does the insulated tab require electrical connection to circuit ground?

No - the insulated tab is electrically isolated from MT1 and MT2 by internal ceramic. It may be mounted directly to a grounded heatsink without shorting the main terminals, satisfying reinforced insulation requirements per UL E81734.

Can BTA06-400CRG replace a standard 4-quadrant triac in existing designs?

Yes, but only if the application uses quadrants I, II, or III. The BTA06-400CRG is a 3-quadrant device and does not conduct in quadrant IV. Gate trigger timing and load characteristics must be verified to avoid unintended non-conduction during negative half-cycles.

Is a heat sink mandatory for 6 A RMS operation?

Yes - at 6 A RMS and ambient temperatures above 40°C, a heatsink is required to maintain Tc ≤ 105°C. With Rth(j-c) = 2.7 °C/W and typical power dissipation ~1.2 W, a heatsink with Rth(c-a) ≤ 30 °C/W is recommended for natural convection in enclosed environments.