Part Number: 50RIA120S90
Function: 1200V, 50A, Medium Power Phase Control Thyristor
Package: TO-65 ( TO-208AC )
Manufacturer: Vishay Semiconductors
Image and Pinouts:
Description
The 50RIA120S90 is a high-power thyristor (SCR) designed for demanding power control applications, featuring a 50A average current rating and 1200V blocking voltage. It offers robust surge capability and excellent dynamic performance, making it suitable for phase-controlled rectification and industrial power regulation systems. The device is typically housed in a stud-mounted package, allowing efficient thermal management and mechanical stability.
Features
- Excellent dynamic characteristics for switching performance
- High dV/dt capability (up to 1000 V/µs option)
- Superior surge current handling capability
- Stud-type package for efficient heat dissipation
- Available in metric thread versions
- Suitable for high-reliability industrial applications
Absolute Maximum Ratings
| Parameter | Symbol | Value | Unit |
| Repetitive Peak Off-State Voltage | VDRM, VRRM | 1200 | V |
| Average On-State Current | IT(AV) | 50 | A |
| Surge Current (Non-repetitive) | ITSM | ~600 | A |
| Critical Rate of Rise of Off-State Voltage | dV/dt | 1000 | V/µs |
| Operating Junction Temperature | TJ | -40 ~ +125 | °C |
Typical Circuit Usage
- Phase-controlled rectifiers (AC-DC conversion)
- AC power control (light dimmers, heaters)
- Motor speed control circuits
- Battery charging systems
- Soft-start circuits for high-power loads
How to Choose This Part
- Select based on required current (≤50A) and voltage (≤1200V)
- Evaluate surge current capability for inductive loads
- Consider switching speed and dV/dt requirements
- Ensure compatibility with gate drive circuitry
- Compare with IGBT or MOSFET solutions for high-frequency applications
Applications
- Phase control converters
- Lighting control circuits
- Battery chargers
- Regulated power supplies
- Temperature and motor speed control systems
Alternative / Equivalent Products
- TYN1225 – 1200V thyristor (lower current)
- SKT50 series – SEMIKRON stud thyristors
- 2N6509 – General-purpose SCR
- BT152 – Medium power thyristor
- IRKT56 – Dual thyristor module
Other data sheets are available within the file:
50RIA100S90M, 50RIA120S90, 50RIA120S90M, 50RIA20S90M, 50RIA40S90M
50RIA120S90 Datasheet PDF Download
