Triac, 600 V, 50 Ma, 40 A, 400 A, 80 Ma, 1.5 V Rohs Compliant: Yes |Stmicroelectronics BTA40-600B

BTA40-600B – 40A 600V Standard Triac – STMicroelectronics

The BTA40-600B from STMicroelectronics is a high-power insulated Triac engineered for robust AC switching in industrial environments. Designed with chassis mounting and an isolated package, this component delivers reliable performance for demanding applications while ensuring simplified thermal management. PCX ensures genuine STMicroelectronics components with rapid shipping and dedicated technical support.

Key Features

• High Current Handling: 40A RMS on-state current (I_T)
• Voltage Rating: 600V off-state voltage
• Surge Protection: 400A non-repetitive surge current (I_TSM)
• Low Trigger Requirements: 1.3V max gate trigger voltage (V_GT), 50mA max gate current (I_GT)
• Wide Temperature Range: Operates at -40°C to +125°C junction temperature
• Insulated Package: RD91-3 case eliminates need for isolation hardware

Technical Specifications

This standard Triac features a single configuration in an RD91-3 insulated chassis-mount package. With a hold current (I_H) of 80mA max and RoHS compliance, it meets stringent environmental standards. The insulated construction (supplier device package: RD91) provides electrical isolation between the heatsink and terminal, enhancing safety in high-voltage systems. Full specifications available in the PCX-hosted datasheet.

Typical Applications

• Industrial motor controls and drives
• AC power switching in HVAC systems
• Lighting dimmers and power regulators
• Solid-state relays and contactors
• Appliance power management systems

About STMicroelectronics

STMicroelectronics is a global semiconductor leader with over 30 years of innovation in power devices. Their thyristor and Triac portfolio sets industry benchmarks for reliability, with rigorous quality control processes ensuring consistent performance in critical applications.

Renowned for robust thermal design and surge resilience, STMicroelectronics components undergo extensive validation for industrial environments. Their vertical integration from silicon design to packaging guarantees traceability and long-term availability, making them a trusted partner for high-voltage solutions worldwide.

About Triacs

Triacs (Triode for Alternating Current) are bidirectional semiconductor switches essential for AC load control. Unlike SCRs, they conduct current in both directions when triggered, enabling full-wave power regulation without complex bridge circuits. This makes them ideal for phase-angle control in resistive or inductive loads.

In industrial settings, Triacs provide efficient solid-state switching with zero-crossing capabilities, reducing electromagnetic interference and mechanical wear. Their ability to handle high surge currents makes them indispensable for motor starters, heater controllers, and lighting systems where reliability under transient conditions is critical.

Packaging Options

Available in Bulk packaging for prototyping or low-volume production. Contact PCX for reel options in volume quantities.

Frequently Asked Questions

Question: Is this Triac suitable for 3-phase motor control?
Answer: Yes, the BTA40-600B’s 40A rating and 600V blocking voltage make it ideal for phase control in 3-phase industrial motors.

Question: Does the insulated package require additional isolation?
Answer: No, the RD91-3 case provides 2500V RMS isolation, eliminating separate insulation kits between heatsink and terminal.

Question: What heatsink is recommended for full-current operation?
Answer: Use a heatsink with ≤1.5°C/W thermal resistance for continuous 40A loads at 40°C ambient. Refer to the datasheet for derating curves.

Question: Can this handle inductive loads like transformers?
Answer: Yes, with proper snubber circuits. The 400A I_TSM rating provides robust protection against voltage spikes.

Question: Is gate triggering sensitive to noise?
Answer: The 50mA I_GT requirement reduces false triggering. For high-noise environments, use filtered trigger circuits.

Question: Are RoHS compliance documents available?
Answer: Yes, PCX provides full material declarations and RoHS certificates with every order.

Product images are representational. Refer to datasheet for exact dimensions.

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