Phase Control SCR 750 Amperes Average 2400 Volts. Powerex Silicon Controlled Rectifiers (SCR) are designed for phase control applications. These are all-diffused, Press-Pak, hermetic Pow-R-Disc devices employing the field proven amplifying gate. Features: • Low On-State Voltage • High di/dt Capability • High dv/dt Capability • Hermetic Packaging • Excellent Surge and I2t Ratings. Applications: • Power Supplies • Motor Control