SK025R

Overview

The Littelfuse SK025R is a standard recovery silicon controlled rectifier (SCR) designed for phase control applications. It features a 1 kV repetitive peak off-state voltage and a 25 A on-state average current rating. The device supports a non-repetitive surge current of up to 350 A at 60 Hz. Operating within a temperature range of -40°C to 125°C, it utilizes a TO-220 Non-Isolated Tab package for through-hole mounting.

Feature Summary

• Standard recovery thyristor construction for reliable switching
• High thermal stability suitable for demanding environments
• Robust surge current handling capability

Applications

• Phase control in heating systems
• Motor speed controls
• General purpose unidirectional switching

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct pinout and electrical characteristics. Confirm that the TO-220 Non-Isolated Tab configuration matches the target circuit board layout requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high voltage blocking and moderate current handling in phase control circuits. Ensure the gate trigger parameters align with the driving logic levels. Consider the thermal resistance of the TO-220 package when designing heat dissipation strategies for continuous operation.

Part Context

This part belongs to the Teccor brand line of half-wave, unidirectional, gate-controlled rectifiers. It complements sensitive gate SCRs by offering standard gate sensitivity. The series is engineered for low-power SCR applications operating up to 1200V, providing a balance of performance and cost-effectiveness for industrial electronics.

Replacement Considerations

Consult official substitution lists for equivalent voltage and current ratings. Verify compatibility of gate trigger characteristics and package dimensions before replacing the original component in existing designs.