S4025LTP

Overview

The Littelfuse S4025LTP is a Silicon Controlled Rectifier (SCR) from the Teccor line, designed as a half-wave, unidirectional, gate-controlled rectifier. It features an electrically isolated package and supports a rated repetitive off-state voltage of 400 V with a maximum RMS on-state current of 25 A. The device operates within a junction temperature range of -40°C to +125°C and utilizes a TO-220AB through-hole package. Key electrical parameters include a forward voltage of 1.6 V, a gate trigger voltage of 1.5 V, and a gate trigger current of 35 mA. It offers high surge capability up to 950 A and maintains a low holding current of 50 mA.

Feature Summary

• Electrically-isolated package design for enhanced safety
• High voltage capability ranging from 200 V to 1000 V
• High surge current handling capacity up to 950 A
• Glass-passivated chip construction for durability

Applications

• General purpose rectification in power supplies
• Industrial motor control circuits
• Lighting dimmer applications
• Battery charging systems

Procurement Notes

Verify the specific suffix 'TP' against the manufacturer's official datasheet to confirm packaging details, such as tube quantity or reel specifications. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the part number with Littelfuse documentation to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select the S4025LTP when a 25 A RMS current rating and 400 V blocking voltage are required in a standard TO-220AB package. Consider this device for applications needing a sensitive gate trigger current of 35 mA. Evaluate thermal management needs based on the 1.6 V forward voltage drop at full load. Compare against other SCR series if higher surge ratings or different package styles are necessary.

Part Context

The S4025LTP belongs to the Teccor line of thyristors manufactured by Littelfuse. This series includes various SCR ratings from 1 A to 70 A and voltages from 200 V to 1000 V. The 'S4025' designation typically indicates a 25 A, 400 V device. The 'LTP' suffix denotes the specific package type and packaging format, distinguishing it from other variants like the S4025RTP or S4025NRP.

Replacement Considerations

Direct replacements may include the S4025RTP, which shares identical electrical characteristics but differs in packaging style. Verify pinout compatibility and thermal resistance values when substituting. Other generic 25 A, 400 V SCRs in TO-220 packages may serve as alternatives if gate trigger specifications align.