Infineon Technologies TT61N12KOFHPSA1

Overview

TT61N12KOFHPSA1 from Infineon Technologies is a phase-control thyristor module configured as a single-phase, anti-parallel pair (B2 topology) for AC power regulation. It delivers 120 A RMS on-state current, 1200 V repetitive peak off-state voltage (VDRM/VRRM), and 1550 A non-repetitive surge current (ITSM) at 10 ms, operating up to 125 °C junction temperature in industrial heating and motor speed control systems.

For engineers reviewing the TT61N12KOFHPSA1 datasheet, TT61N12KOFHPSA1 pinout, TT61N12KOFHPSA1 application, or TT61N12KOFHPSA1 equivalent, key selection criteria include gate trigger current (≤120 mA), critical dv/dt rating (1000 V/µs), thermal resistance (0.26 °C/W junction-to-case per module), and UL E83336 listing for safety-compliant power conversion designs.

Technical Context

This thyristor module implements a pressure-contact silicon die structure with aluminum nitride (AlN) internal isolation, enabling high-current commutation in phase-angle controlled AC circuits. Its 120 µs typical turn-off time (tq) and 150 A/µs critical di/dt support reliable forced-commutated switching in rectifier and inverter bridges.

The device operates in B2 (two-pulse) bridge configuration with dual thyristor arms sharing one heatsink interface. Thermal design relies on validated transient impedance models (ZthJC) for sinusoidal and rectangular conduction angles, supporting precise loss calculation (PTAV) and case temperature prediction (TC) across load profiles.

Key Specifications

Pinout & Package

TT61N12KOFHPSA1 uses a press-pack, double-sided cooled module package with isolated copper baseplate and AlN ceramic insulation. Mechanical mounting employs M1 screws (4 Nm torque) and M2 terminal screws (4 Nm torque) for main terminals and gate control leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT61N12KOFHPSA1, TT61N12KOIHPSA1 trades thermal efficiency for cost in single-arm use cases, while TT100N12KOFHPSA1 extends current capacity without altering gate drive or packaging-enabling drop-in upgrades where board space and heatsink remain unchanged.

Availability

TT61N12KOFHPSA1 is available at Aetrix Electronics and suitable for industrial heating control, AC motor soft starting, DC power supply rectification, and welding power regulation requiring stable component supply and long-term lifecycle support.

Supply support for TT61N12KOFHPSA1 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 industrial control devices, with global manufacturing and quality certifications including ISO/TS 16949 and IATF 16949.

This part belongs to Infineon's "Netz-Thyristor-Modul" series, engineered specifically for high-reliability, high-current phase-control applications in industrial power conversion, where thermal robustness and UL safety compliance are mandatory.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (TC) is not fixed but depends on load current and conduction angle. At 120 A RMS with 180° conduction (full sine wave), TC reaches 125 °C-the absolute limit matching Tvj max. Derating is required for higher ambient or forced-air cooling scenarios, per the TC = f(ITAVM) curves on page 7 of the datasheet.

Does TT61N12KOFHPSA1 require a heatsink, and what thermal interface material is recommended?

Yes, active heatsinking is mandatory: RthJC is 0.26 °C/W per module, and RthCH is 0.08 °C/W per module-both assume optimized mechanical contact. Infineon specifies M1 screw torque of 4 Nm ±15% and recommends thermally conductive grease (e.g., Dow Corning TC-5651) or phase-change pads meeting 1.5 W/m·K minimum conductivity.

Can this module be used in a six-pulse (B6) rectifier configuration?

Yes-TT61N12KOFHPSA1 supports B6 operation as documented in Figure 8 (page 8), where three modules form one leg of a three-phase bridge. Each module handles one AC phase pair; total system ITAVM scales with parallel count, and thermal modeling must use per-arm RthJC (0.52 °C/W) for B6 layouts.

What gate drive circuitry is required to ensure reliable triggering?

A gate driver must deliver ≥1 A peak pulse (iGM), 1 A/µs diG/dt, and 20 µs minimum pulse width (tg) to guarantee latching (IL ≤ 620 mA). VGT ≤ 1.4 V and IGT ≤ 120 mA at 25 °C define minimum steady-state drive; snubbers are advised on gate lines to suppress dv/dt-induced false triggering.