STMicroelectronics BTA24-600BWRG

Overview

BTA24-600BWRG from STMicroelectronics is a 25 A RMS, 600 V repetitive peak off-state voltage snubberless triac in TO-220AB insulated package, designed for high-commutation AC switching in phase-control and on/off applications. It delivers 50 mA gate trigger current (IGT), 500 V/µs dV/dt immunity at 125 °C, and 13 A/ms critical rate of rise of on-state current without external snubber.

For engineers reviewing the BTA24-600BWRG datasheet, BTA24-600BWRG pinout, BTA24-600BWRG application, or BTA24-600BWRG equivalent, this device is selected for robust AC load control where high dV/dt immunity, low thermal resistance (Rth(j-c) = 1.7 °C/W), and UL1557 recognition are required in heating, motor starting, and dimming circuits.

Technical Context

This snubberless triac operates in three quadrants (I, II, III) with guaranteed 50 mA IGT and 500 V/µs dV/dt capability at Tj = 125 °C. Its design eliminates need for external RC snubbers in inductive loads by sustaining high commutation performance under rapid voltage transients.

Thermal management is enabled by insulated TO-220AB packaging (2.5 kV insulation rating, UL94 V0 resin) and junction-to-case thermal resistance of 1.7 °C/W, supporting stable 25 A RMS operation at Tc = 75 °C per datasheet Figure 2.

Key Specifications

Pinout & Package

TO-220AB insulated package with creepage/clearance optimized for reinforced insulation; 3-pin through-hole mounting; tab electrically isolated from A2 terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTB24-600BRG and T2535-600G, BTA24-600BWRG uniquely combines reinforced insulation (2.5 kV), snubberless 3Q operation, and TO-220AB mechanical robustness-making it optimal for safety-certified, through-hole AC control modules where isolation and reliability are non-negotiable.

Availability

BTA24-600BWRG is available at Aetrix Electronics and suitable for heating regulation, light dimming, induction motor starting, and static relay replacement requiring stable component supply across industrial, appliance, and building automation programs.

Supply support for BTA24-600BWRG 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.

BTA24 belongs to ST's high-power discrete triac product line, engineered specifically for reliable, snubberless AC switching in safety-critical mains-connected equipment.

FAQ

What is the maximum junction temperature for continuous operation?

The BTA24-600BWRG has an operating junction temperature range of –40 °C to +125 °C. Continuous operation must maintain Tj ≤ 125 °C, which corresponds to a maximum case temperature of 75 °C per the datasheet's IT(RMS) vs. TC curve (Figure 2), assuming proper heatsinking and thermal interface design.

Is a snubber circuit required for inductive loads?

No snubber is required for typical inductive loads due to its snubberless 3-quadrant design and guaranteed 500 V/µs dV/dt immunity at 125 °C. This is validated for standard motor and transformer loads per datasheet Table 2; however, extreme transients beyond 1000 V/µs may still warrant localized protection.

How does the insulated TO-220AB package affect mounting and thermal design?

The insulated package electrically isolates the metal tab (A2) from the heatsink, enabling direct mounting without insulating washers-reducing thermal resistance by ~0.3–0.5 °C/W versus insulated kits. Mechanical torque must be limited to 0.55 N·m (max 0.70 N·m) to avoid cracking the molding compound.

Can BTA24-600BWRG replace BTA24-600CWRG in existing designs?

Yes, but only if gate drive capability supports 50 mA IGT. The "B" suffix denotes 50 mA standard sensitivity, while "C" denotes 35 mA snubberless sensitivity. Swapping requires verifying that the existing gate driver can deliver ≥50 mA peak current without exceeding PG(AV) = 1 W or IGM = 4 A limits.