Infineon Technologies TT61N14KOFHPSA1

Overview

TT61N14KOFHPSA1 from Infineon Technologies is a phase-control thyristor module configured as a single-phase, anti-parallel pair (B2 topology) for AC power regulation in industrial heating and motor speed control. It delivers 60 A average on-state current at TC = 85°C, supports 1400 V repetitive peak off-state voltage (VDRM/VRRM), and withstands 1550 A non-repetitive surge current (ITSM) with 120 µs turn-off time (tq). Its AlN-insulated press-pack construction enables direct heatsink mounting in high-reliability 3-phase rectifier and soft-start applications.

For engineers reviewing the TT61N14KOFHPSA1 datasheet, TT61N14KOFHPSA1 pinout, TT61N14KOFHPSA1 application, or TT61N14KOFHPSA1 equivalent, key selection criteria include verified gate trigger current (IGT ≤ 120 mA), critical dv/dt rating (1000 V/µs), thermal resistance (RthJC = 0.26 °C/W per module), and UL E83336 listing for safety-critical AC line control systems.

Technical Context

This thyristor module implements a dual-die, pressure-contact Si pellet design with aluminum nitride (AlN) internal insulation and symmetrical anti-parallel configuration for bidirectional AC conduction. It operates under forced or natural cooling with validated transient thermal impedance ZthJC profiles for sinusoidal and rectangular current waveforms across conduction angles from 30° to 180°.

The device uses gate-controlled commutation with defined latching (IL ≤ 620 mA) and holding (IH ≤ 200 mA) currents, and features a low slope resistance (rT = 3.4 mΩ) and threshold voltage (V(TO) = 0.8 V) to minimize conduction losses in high-current phase-angle control circuits operating up to 125°C junction temperature.

Key Specifications

Pinout & Package

TT61N14KOFHPSA1 is housed in a press-pack module with isolated copper terminals and AlN ceramic base. Mechanical mounting uses M1 screws (4 Nm ±15%) for case-to-heatsink clamping and M2 screws (4 Nm ±10%) for electrical 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 TT61N14KOFHPSA1, the TT61N16K variant offers higher voltage headroom without thermal or footprint trade-offs, while the TD61N14K sacrifices AC bidirectionality for simplified gate drive and lower cost in DC-only systems.

Availability

TT61N14KOFHPSA1 is available at Aetrix Electronics and suitable for industrial heating control, AC motor soft-start, DC power supply rectification, and welding current regulation requiring stable component supply across multi-year production programs.

Supply support for TT61N14KOFHPSA1 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 BIP AC thyristor module product line, engineered for high-power AC phase control in harsh industrial environments where reliability, thermal robustness, and safety certification are mandatory.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum case temperature (TC) is not fixed but depends on ITAVM and conduction angle. At 60 A average current and 180° conduction, TC reaches 85°C per datasheet Fig. 7. For forced cooling with KM14 heatsink and Papst 4650N fan, TC remains ≤75°C at 60 A, enabling safe long-term operation within the 125°C junction limit.

Does TT61N14KOFHPSA1 require a heatsink, and what thermal interface material is recommended?

Yes, a heatsink is mandatory: RthJC = 0.26 °C/W and RthCH = 0.08 °C/W require total RthCA ≤ 0.34 °C/W for 60 A operation at 125°C junction. Use thermally conductive grease (e.g., Dow Corning TC-5122) or phase-change pads (e.g., Laird T-Pad 200) between the copper base and heatsink surface to maintain interfacial resistance below 0.02 °C·in²/W.

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

No - TT61N14KOFHPSA1 is a single-phase anti-parallel module (B2 topology) with two arms. A B6 rectifier requires three such modules (one per phase pair) or a dedicated three-phase module like the TT100N14KOFHPSA1. Using one TT61N in B6 would result in incomplete phase coverage and asymmetric loading.

What gate drive circuit specifications ensure reliable triggering?

Gate drive must deliver ≥1 A peak current with di/dt ≥1 A/µs and pulse width ≥20 µs to exceed the 620 mA latching current (IL). A 15 V, 2 A pulse transformer or isolated MOSFET driver (e.g., Infineon 1ED020I12FA) with <100 ns propagation delay ensures tgd ≤3 µs and prevents misfiring under high dv/dt conditions.