T2500DG

Overview

The Littelfuse T2500DG is a bidirectional triac housed in a TO-220AB package, designed for full-wave AC control applications. It features a peak repetitive off-state voltage (VDRM/VRRM) of 400 V and an on-state RMS current rating of 6.0 A at a case temperature of +80°C. The device supports a peak non-repetitive surge current of 60 A and operates within a junction temperature range of -40 to +125°C. Electrical characteristics include a maximum on-state voltage of 2.0 V, a gate trigger voltage up to 2.5 V, and a holding current maximum of 30 mA. The component utilizes diffused and glass-passivated junctions for parameter stability.

Feature Summary

• Features all diffused and glass-passivated junctions to ensure greater parameter uniformity and long-term stability.
• Utilizes small, rugged Thermowatt construction to provide low thermal resistance, high heat dissipation, and mechanical durability.
• Offers high surge current capability with a peak rating of 60 A at a case temperature of 80°C.

Applications

• Light dimmers
• Motor controls
• Heating controls
• Power supplies

Procurement Notes

Verify the specific ordering suffix 'G' confirms the lead-free package status as documented in the manufacturer's datasheet. Confirm that the TO-220AB physical dimensions match the required PCB layout constraints. Ensure the 400 V blocking voltage rating aligns with the circuit's peak line voltage requirements. Check for any recent product change notices regarding material composition or manufacturing location updates.

Selection Notes

Select this component when a bidirectional switch is required for AC phase control circuits operating at 400 V. The 6.0 A RMS current rating suits moderate power loads. Consider the TO-220AB package for through-hole mounting and heatsinking capabilities. Evaluate the gate trigger current specifications against the driving circuit's output capability to ensure reliable turn-on across all quadrants.

Part Context

The T2500DG belongs to the T2500D series of thyristors manufactured by Littelfuse. This series is characterized by its robust construction and suitability for general-purpose AC switching tasks. The 'G' suffix specifically denotes the lead-free variant of the standard TO-220AB packaged triac, adhering to environmental compliance standards while maintaining identical electrical performance parameters.

Replacement Considerations

Consult official Littelfuse documentation for confirmed substitute part numbers. Verify that any replacement maintains the 400 V blocking voltage and 6.0 A RMS current ratings. Ensure the alternative device fits the TO-220AB footprint and matches the thermal resistance characteristics for adequate heat dissipation.

FAQ

What is the maximum peak repetitive off-state voltage for the T2500DG?

The maximum peak repetitive off-state voltage (VDRM and VRRM) is 400 V.

Does the T2500DG support operation in all four quadrants?

Yes, the device is a bidirectional triac capable of triggering in all four quadrants, though Quadrants I and III are typically used with in-phase signals.

What is the thermal resistance from junction to case?

The thermal resistance from junction to case (RθJC) is 2.7 °C/W.