STMicroelectronics

BTA40-700B

BTA40-700B Description

The BTA40-700B is a high-power standard TRIAC manufactured by STMicroelectronics, designed for robust AC switching applications. With an off-state voltage rating of 700V and an on-state RMS current (It(RMS)) of 40A, this device is engineered to handle demanding loads in industrial and commercial environments. Packaged in a RD91 chassis-mount configuration, it ensures efficient thermal dissipation and mechanical stability. Although marked as obsolete, its ROHS3 compliance and REACH-unaffected status make it a viable choice for legacy systems requiring high reliability.

BTA40-700B Features

• High Current Handling: Supports 40A RMS continuous current and 400A/420A surge current (50Hz/60Hz), making it suitable for high-load scenarios.
• Low Trigger Requirements: Gate trigger voltage (Vgt) of 1.3V max and trigger current (Igt) of 50mA max ensure easy drive compatibility.
• Robust Construction: Chassis-mount RD91 package enhances heat dissipation, critical for sustained high-current operation.
• Wide Voltage Range: 700V blocking voltage provides ample margin for industrial AC line applications.
• Reliability: MSL 1 (Unlimited) moisture sensitivity and ROHS3 compliance ensure environmental and regulatory suitability.

BTA40-700B Applications

• Industrial Motor Controls: Ideal for AC motor drives, soft starters, and heavy-duty relays due to its high surge current tolerance.
• Lighting Systems: Suitable for high-power dimmers and lighting controllers in commercial setups.
• Power Switching: Used in solid-state relays (SSRs) and contactors for HVAC systems and industrial automation.
• Legacy Equipment Maintenance: A dependable choice for repairing or upgrading older systems requiring high-voltage TRIACs.

Conclusion of BTA40-700B

The BTA40-700B stands out for its high current capacity, low triggering needs, and rugged chassis-mount design, making it a reliable choice for power control in harsh environments. While obsolete, its performance metrics—such as 700V voltage rating and 40A RMS current—ensure it remains relevant for specific industrial applications. Engineers seeking a robust, high-power TRIAC for motor controls, lighting, or legacy systems will find this device a proven solution.