STMicroelectronics TRIAC, RD-91 Series - 40A 800V
General-purpose 3-pin insulated TRIAC for AC switching. High commutation, low thermal resistance. Ideal for motor control, lighting & industrial use.
The STMicroelectronics TRIAC, RD-91 Series is a high-performance, three-pin standard insulated thyristor designed for general-purpose AC switching applications. With its robust construction and advanced internal design, it is engineered to deliver reliable ON/OFF functionality in a wide range of electronic circuits, making it a versatile component for both commercial and industrial systems.
A key feature of this TRIAC is its voltage-insulated tab, achieved through an internal ceramic pad. This provides enhanced electrical isolation, improving safety and reliability. The device also boasts superior commutation performance, ensuring clean and efficient switching transitions, which is critical for controlling inductive loads.
Constructed with a low thermal resistance and utilising clip bonding technology, the TRIAC effectively dissipates heat, enabling high current operation without compromising performance or longevity. This makes it exceptionally durable under demanding electrical conditions.
Specifications & Features
- Type: TRIAC
- Current Rating: High current operation suitable for robust applications
- Commutation: High commutation performance for reliable switching
- Thermal Design: Low thermal resistance with clip bonding for efficient heat dissipation
- Insulation: Voltage insulated tab via internal ceramic pad for enhanced safety
- Terminals: 3-pin standard configuration
- Case Style: Industry-standard RD-91 package
- Mounting: Panel-mounted for secure installation
- Operating Temperature: Maximum operating temperature of 125°C, suitable for harsh environments
This component is an essential choice for engineers and technicians looking for a dependable and efficient solid-state AC switch.
Variant Details
- Size: 40A 800V
- Motor drive control
- Industrial switching applications
- Lighting control and dimming
- ON/OFF load switching in AC circuits
- Configuration: Single TRIAC
- Peak Repetitive Off State Voltage: 800V
- On State RMS Current: 40A
- Triac Case Style: RD-91
- Gate Trigger Voltage Max: 1.5V
- Peak Non Repetitive Surge Current: 400A
- Holding Current Max: 80mA
- Peak On State Voltage: 1.55V
- No. of Pins: 3
- Mounting: Panel
- Operating Temperature Max: 125°C
- Insulation: Voltage insulated tab with internal ceramic pad
- Weight: 2.4 grams
- Dimensions: Height 43mm, Width 33mm, Depth 15mm
- of Pins: 3Pins
- Thyristor Mounting: Panel
- SVHC: No SVHC (25-Jun-2025)
Always follow local regulations and product guidance.
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