BTA08-800BW3G

Triacs Overview

The Littelfuse BTA08-800BW3G is a bidirectional thyristor (TRIAC) designed for high-performance full-wave AC control applications. It features an on-state RMS current rating of 8.0 A at a case temperature of 80°C and a peak repetitive off-state voltage of 800 V. The device offers a peak non-repetitive surge current capability of 90 A and includes internal isolation rated at 2500 VRMS. It operates within a junction temperature range of -40°C to +125°C and utilizes the industry-standard TO-220AB package.

Triacs Feature Summary

• High commutating di/dt performance with a minimum rating of 1.5 A/ms at 125°C
• Uniform gate trigger currents across three quadrants for consistent switching
• High immunity to dV/dt, minimizing the need for external snubber networks
• Internally isolated construction providing enhanced safety and noise rejection

Triacs Applications

• High-performance full-wave AC control systems
• Industrial motor speed control circuits
• Solid-state relay designs requiring high noise immunity
• Lighting dimmer applications in commercial environments

Triacs Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm voltage ratings and compliance status. Ensure that the procurement channel provides original documentation to validate Pb-Free and RoHS compliance claims. Cross-reference the part marking system with the official CASE 221A style specifications to prevent counterfeit components.

Triacs Selection Notes

Select this component when an 800 V blocking voltage and 8 A continuous current are required in a TO-220AB package. Consider the thermal resistance values for heat sink design, noting the junction-to-case resistance is 2.5 °C/W. Evaluate the gate trigger current requirements against the driving circuit capabilities, particularly at elevated temperatures where sensitivity may vary.

Triacs Part Context

This device belongs to the BTA08 series of surface mount and through-hole TRIACs from Littelfuse. It shares the same physical footprint and current handling characteristics as the BTA08-600BW3G, differing primarily in its higher voltage blocking capability. The series is engineered for robust operation in industrial AC power control environments.

Triacs Replacement Considerations

The BTA08-600BW3G serves as a lower-voltage alternative within the same package. Verify compatibility with other manufacturers offering equivalent 800 V, 8 A TRIACs in TO-220AB packages, ensuring gate trigger parameters and thermal characteristics align with the original design requirements.

Triacs FAQ

What is the maximum operating junction temperature for the BTA08-800BW3G?

The maximum operating junction temperature is +125°C.

How does the holding current vary with temperature?

The holding current increases as the junction temperature rises, varying from approximately 5 mA at -40°C to over 55 mA at 125°C depending on MT2 polarity.

Is the gate trigger current uniform across all quadrants?

Yes, the device specifies uniform gate trigger currents in three quadrants, facilitating predictable triggering behavior in standard AC line applications.