70TPS12 Phase Control SCR Thyristor 70A 1200V TO-247

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70TPS12A SCR 1.2kV 75A Standard Recovery Through Hole TO-247 The 70TPS12A belongs to International Rectifier’s SAFEIR family of phase‑control silicon‑controlled rectifiers, packaged in a rugged Super‑247 (TO‑247) through‑hole case. Engineered for high‑ and medium‑power switching applications, it handles an average on‑state current of 70 A (sinusoidal half‑wave at 82 °C) and a continuous RMS current of 75 A, with repetitive peak reverse voltage rating of 1 200 V. Its standard‑recovery design features a blocking voltage of up to 1 200 V (1 600 V variant available), and it endures non‑repetitive surge currents up to 1 400 A (10 ms, no voltage reapplied). The device’s built‑in thermal shutdown and robust junction‑to‑case thermal resistance (0.27 °C/W) support reliable operation from –40 °C to +125 °C. Gate trigger requirements span 80–270 mA across temperature extremes, ensuring consistent turn‑on performance. With a peak on‑state voltage drop of 1.4 V at 100 A, turn‑on di/dt capability of 150 A/µs, and dv/dt immunity of 500 V/µs, the 70TPS12A is optimized for input rectification (soft‑start), AC‑switching, crowbar protection, and phase‑angle control in UPS systems, welding equipment, and motor drives. Its standardized TO‑247 footprint and compatibility with companion IR diodes make it straightforward to integrate into heatsink‑mounted power assemblies. Features: Rated average on‑state current: 70 A (sinusoidal half‑wave). Continuous RMS current: 75 A (lead‑limited). Non‑repetitive surge current: 1 400 A (10 ms, no voltage reapplied). Standard recovery with blocking voltage up to 1 200 V. Turn‑on di/dt = 150 A/µs; dv/dt = 500 V/µs. Low junction‑to‑case thermal resistance: 0.27 °C/W. Wide junction temperature range: –40 °C to +125 °C. Specifications: Product Attribute Attribute Value Product Category: SCRs Rated Repetitive Off-State Voltage VDRM: 1.2 kV Off-State Leakage Current @ VDRM IDRM: 1 mA Vf – Forward Voltage: 1.4 V Maximum Gate Peak Inverse Voltage: 10 V Gate Trigger Voltage – Vgt: 1.5 V Gate Trigger Current – Igt: 100 mA Minimum Operating Temperature: – 40 C Maximum Operating Temperature: + 125 C Package/Case: Super-247 Current Rating: 70 A Holding Current Ih Max: 200 mA Non Repetitive On-State Current: 1.4 kA Applications: Input‑rectifier soft‑start circuits. AC‑switching and phase‑angle control. High‑current crowbar protection. UPS and regulated power‑supply input stages. Welding and battery‑charging power controls. Package Contents: 1x 70TPS12 Phase Control SCR Thyristor 70A 1200V TO-247 70TPS12 Datasheet