Infineon Technologies TT425N12KOFHPSA2

Overview

TT425N12KOFHPSA2 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching in industrial power conversion systems. It features 1200 V repetitive peak off-state voltage (VDRM/VRRM), 471 A average on-state current at TC = 85 °C, 14.5 kA non-repetitive surge current (ITSM), and electrically insulated baseplate construction for safe integration into soft starters and static switches.

For engineers reviewing the TT425N12KOFHPSA2 datasheet, TT425N12KOFHPSA2 pinout, TT425N12KOFHPSA2 application, or TT425N12KOFHPSA2 equivalent, key selection criteria include junction-to-case thermal resistance (0.065 K/W), gate trigger current (≤250 mA), critical dv/dt rating (1000 V/µs), and pressure-contact die attachment for high-cycle reliability in crowbar and UPS rectifier designs.

Technical Context

This dual-thyristor module operates in phase-controlled AC conduction mode with symmetrical forward/reverse blocking capability up to 1200 V. Its pressure-contact silicon pellet structure eliminates wire bonds, enabling robust operation under high di/dt (120 A/µs) and high dv/dt (1000 V/µs) transients typical in drive rectifiers and static bypass switches.

The module integrates two independent thyristor arms in a single industrial-standard package with electrically isolated baseplate (3.0 kV RMS insulation test voltage). Thermal performance is defined by per-arm RthJC = 0.065 K/W and RthCH = 0.02 K/W, supporting continuous operation at TC ≤ 125 °C with DC or 180° conduction-angle loads.

Key Specifications

Pinout & Package

TT425N12KOFHPSA2 is housed in an industrial-standard press-pack module with electrically insulated baseplate (AlN ceramic), 60 mm baseplate dimension, and M12 terminal torque specification for main power connections. Control terminals conform to DIN 46244 A (2.8 × 0.8 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor module applications.

Compared with TT425N12KOFHPSA2, the 1400 V variant offers enhanced overvoltage margin without thermal or footprint trade-offs, while the TD425N provides modular flexibility at the cost of board space and interconnect complexity in bridge designs.

Availability

TT425N12KOFHPSA2 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, crowbar protection circuits, and static bypass switches requiring stable component supply and long-term industrial lifecycle support.

Supply support for TT425N12KOFHPSA2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power electronics, automotive ICs, and security solutions, with global manufacturing and R&D centers.

This part belongs to Infineon's high-power thyristor module product line, engineered for ruggedized industrial AC power control including motor drives, energy storage systems, and grid-tied power conversion.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (TC) is +125 °C, as specified in the thermal characteristics table. Operation above this temperature risks exceeding the 125 °C maximum junction temperature (Tvj max), potentially causing irreversible degradation. Derating curves on page 7 show ITAVM reduction below 471 A when TC exceeds 85 °C under 180° conduction.

Does TT425N12KOFHPSA2 require forced air cooling?

No, forced air cooling is not mandatory. The module supports natural convection or conductive cooling when paired with a heatsink achieving RthCA ≤ 0.15 K/W (per arm) for full 471 A ITAVM operation at TA = 40 °C. Page 8 thermal graphs confirm 471 A is sustainable at TC = 85 °C with RthCH = 0.02 K/W and appropriate ambient thermal management.

Can this module be used in anti-parallel configuration for AC switching?

Yes, TT425N12KOFHPSA2 is explicitly designed for anti-parallel use in AC static switches. Its symmetrical VDRM/VRRM (1200 V), matched gate parameters (IGT ≤ 250 mA, VGT ≤ 1.5 V), and identical thermal characteristics per arm enable balanced conduction in both directions without external balancing components.

What is the recommended gate drive circuit for reliable triggering?

A gate drive delivering ≥1 A peak current with di/dt ≥1 A/µs and pulse width ≥20 µs is required to exceed the 1500 mA latching current (IL) and ensure turn-on under worst-case Tvj = 125 °C. Page 6 shows the vG–iG triggering area at VD = 12 V; drivers must operate within region "c" (100 W/0.5 ms) to avoid gate damage during repeated firing.