BT1308-400D,412

Overview

The BT1308-400D,412 is a passivated sensitive gate triac housed in a SOT54 (TO-92) plastic package. It supports a repetitive peak off-state voltage of 400 V and an RMS on-state current of 0.8 A. The device features four-quadrant gate triggering with a maximum gate trigger current of 5 mA. It operates within a junction temperature range up to 125 °C and includes thermal resistance specifications for lead and ambient environments.

Feature Summary

• Sensitive gate design enabling direct interfacing with logic level ICs
• Four-quadrant gate triggering capability for versatile drive circuit integration
• Passivated structure for enhanced reliability

Applications

• General purpose switching and phase control
• Low-power AC fan speed controllers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package variant and compliance status. Ensure the component meets the required electrical ratings for the intended application environment before procurement.

Selection Notes

Select this component for applications requiring low gate drive power and direct logic interface compatibility. Consider the 0.8 A RMS current limit and 400 V blocking voltage when designing circuits for general AC switching tasks.

Part Context

This part belongs to the NXP BT1308 series D family of logic level triacs. It shares functional characteristics with other variants in the series, such as the 600 V rated version, but is distinguished by its specific voltage rating and TO-92 through-hole packaging configuration.

Replacement Considerations

Check for equivalent triacs with matching 400 V ratings and TO-92 packages. Verify that any substitute maintains compatible gate trigger currents and thermal resistance values to ensure circuit performance integrity.