S4025R

Overview

The Littelfuse S4025RTP is a standard recovery silicon controlled rectifier (SCR) from the Teccor series. It features a 400 V rated repetitive off-state voltage and conducts an RMS on-state current of 25 A. The device has a forward voltage of 1.6 V, with gate trigger requirements of 1.5 V and 35 mA. It operates within a temperature range of -40°C to +125°C in a TO-220-2 through-hole package.

Feature Summary

• Unidirectional half-wave gate-controlled rectification
• Standard recovery performance for general switching applications
• Non-isolated tab configuration for thermal management

Applications

• Industrial motor control circuits
• High-power lighting dimming systems
• General purpose AC power regulation

Procurement Notes

Verify the specific suffix against official datasheets, as variations like 'R' or 'P' may indicate different isolation or packaging standards. Confirm RoHS compliance status directly with manufacturer documentation. Ensure the procurement channel provides valid traceability for semiconductor components to guarantee authenticity and performance reliability.

Selection Notes

Select this component when unidirectional high-current handling is required. Compare the 25 A RMS rating against peak load demands. Evaluate the TO-220-2 package suitability for the available thermal dissipation path. Verify that the 400 V blocking capability exceeds the circuit's maximum transient voltages.

Part Context

This part belongs to the Teccor line of thyristors, which are designed as half-wave, unidirectional, gate-controlled rectifiers. These devices complement sensitive SCRs in the Littelfuse portfolio, offering robust performance for industrial and commercial power electronics applications requiring reliable switching.

Replacement Considerations

Cross-reference with other 400V 25A TO-220 SCRs from manufacturers such as STMicroelectronics or Vishay. Ensure equivalent gate trigger characteristics and thermal resistance values are met to maintain circuit stability without redesign.