VS-25RIA120

Scrs Overview

The VS-25RIA120 is a medium power phase control thyristor (SCR) from the Vishay 25RIA series, housed in a TO-208AA (TO-48) stud package. It features a maximum repetitive peak off-state voltage of 1200 V and an average on-state current rating of 25 A at a case temperature of 85 °C. The device supports a maximum RMS on-state current of 40 A and offers high surge current capability with ITSM ratings of 420 A at 50 Hz and 440 A at 60 Hz. Key electrical characteristics include a maximum on-state voltage of 1.70 V, a gate trigger current of 60 mA at 25 °C, and a junction temperature range of -65 °C to +125 °C.

Scrs Feature Summary

• Improved glass passivation for high reliability and exceptional stability at elevated temperatures
• High dI/dt and dV/dt capabilities suitable for demanding switching environments
• Low thermal resistance design facilitating efficient heat dissipation in stud mount configurations

Scrs Applications

• Medium power switching circuits
• Phase control applications
• Industrial and consumer level equipment requiring robust thyristor performance

Scrs Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm mechanical thread type and critical dV/dt specifications. The standard configuration utilizes a 1/4"-28UNF-2A stud base, while metric M6 x 1 threads are available with an 'M' suffix. Ensure that any special selection codes, such as S90 for enhanced dV/dt ratings, are explicitly included in the part number if required by the circuit design constraints.

Scrs Selection Notes

Select this component based on the 1200 V blocking voltage requirement and the 25 A continuous current capacity at 85 °C case temperature. Evaluate the thermal management strategy using the specified junction-to-case thermal resistance of 0.75 K/W under DC operation. Confirm that the application's gate drive circuit can supply the necessary trigger voltage and current parameters across the full operating temperature range of -65 °C to +125 °C.

Scrs Part Context

This device belongs to the Vishay 25RIA series of medium power phase control thyristors designed for industrial and consumer applications. The series encompasses various voltage ratings up to 1200 V within the same standardized TO-208AA package family. These components are engineered to meet stringent reliability standards and can be supplied to satisfy high-reliability requirements for aerospace and military sectors when ordered with appropriate qualification codes.

Scrs Replacement Considerations

Direct substitutes within the same series include VS-25RIA100 (100 V), VS-25RIA200 (200 V), VS-25RIA400 (400 V), VS-25RIA600 (600 V), VS-25RIA800 (800 V), and VS-25RIA1000 (1000 V). Variants with metric threads are designated with an 'M' suffix, such as VS-25RIA120M. Devices with enhanced dV/dt ratings utilize the 'S90' suffix, for example, VS-25RIA120S90.