2N5204

Overview

The Vishay VS-2N5204 is a phase control thyristor (SCR) from the VS-2N5205 series, designed for general-purpose applications. It features a stud-mounted TO-48 (TO-208AA) package and supports a maximum repetitive peak reverse voltage range of 600 V to 1200 V. The device handles a maximum RMS on-state current of 35 A and an average on-state current of 22 A. Key electrical characteristics include a maximum peak on-state voltage of 2.3 V, a gate trigger current of 40 mA at 25 °C, and a junction temperature range of -40 °C to +125 °C.

Feature Summary

• General-purpose stud-mounted construction suitable for high-current power control
• Broad forward and reverse voltage rating options extending up to 1200 V
• High surge current capability with robust I²t fusing protection
• Defined thermal resistance and mounting torque specifications for reliable heatsinking

Applications

• Industrial motor speed control systems
• AC power regulation and lighting dimmers
• Battery charging circuits
• Welding equipment power supplies

Procurement Notes

Verify the specific voltage suffix (e.g., VS-2N5204-xx) required for your circuit's blocking voltage needs. Confirm that the TO-48 mounting interface matches your heatsink design. Ensure the gate drive circuitry can supply the specified 40 mA trigger current at the operating temperature. Review the derating curves for average current based on case temperature limits.

Selection Notes

Select this component when high current handling and ruggedness are prioritized over switching speed. The TO-48 package requires mechanical mounting hardware and thermal interface material. Compare the 35 A RMS rating against your continuous load requirements. Consider the 100 V/µs dV/dt rating to prevent false triggering in noisy environments without additional snubber networks.

Part Context

This part belongs to the VS-2N681 and VS-2N5205 series of phase control thyristors manufactured by Vishay Semiconductors. These devices are JEDEC registered and intended for use in controlled rectifier applications. The series offers various voltage ratings within the same physical footprint, allowing for design flexibility while maintaining standardized mounting dimensions.

Replacement Considerations

Direct replacements must match the 35 A RMS current rating and TO-48 package style. Verify that substitute SCRs meet or exceed the 600 V to 1200 V blocking voltage range. Check that the replacement device has compatible gate trigger characteristics and thermal resistance values to ensure proper operation in the existing heatsink assembly.