Infineon Technologies TT400N26KOFHPSA1

Overview

TT400N26KOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line commutation in industrial rectifier and motor control systems. It delivers 400 A average on-state current (ITAVM) at TC = 85°C, 2600 V repetitive peak off-state voltage (VDRM/VRRM), and supports 13 kA non-repetitive surge current (ITSM) - enabling robust operation in 6-pulse bridge configurations up to 1400 A output with forced cooling.

For engineers reviewing the TT400N26KOFHPSA1 datasheet, TT400N26KOFHPSA1 pinout, TT400N26KOFHPSA1 application, or TT400N26KOFHPSA1 equivalent, key selection criteria include verified thermal resistance (RthJC = 0.0325 °C/W per module), gate trigger parameters (IGT ≤ 250 mA, VGT ≤ 2.2 V), critical dv/dt rating (1000 V/µs), and validated I²t withstand (845,000 A²s at Tvj = 25°C).

Technical Context

This dual-arm thyristor module implements a B6 six-pulse bridge topology with pressure-contact silicon pellets and aluminum nitride (AlN) internal isolation. Its 125°C maximum junction temperature and 0.5 mΩ slope resistance enable stable conduction under high RMS load (ITRMSM = 800 A) while maintaining low forward voltage drop (vT ≤ 1.88 V at 1500 A).

The device features gate-controlled turn-on with latching current (IL ≤ 1500 mA) and holding current (IH ≤ 300 mA), and supports natural or forced cooling via standardized M1/M2 mounting interfaces. Its 300 µs circuit-commutated turn-off time (tq) and 150 A/µs di/dt capability ensure reliable commutation in line-synchronized applications.

Key Specifications

Pinout & Package

TT400N26KOFHPSA1 is housed in a press-pack module package with isolated copper baseplate and AlN ceramic insulation. Mechanical terminals follow DIN 46244 A standard (2.8 × 0.8 mm flat contacts); mounting uses M1 (6 Nm ±15%) and M2 (12 Nm ±10%) torque specifications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT500N22KOFHPSA1 and TT330N26KOFHPSA1, TT400N26KOFHPSA1 uniquely balances 2600 V isolation and 400 A thermal rating - making it optimal for 690 VAC industrial rectifiers requiring both voltage headroom and current scalability without thermal derating.

Availability

TT400N26KOFHPSA1 is available at Aetrix Electronics and suitable for industrial DC power supplies, medium-voltage motor drives, and resistance welding controls requiring stable component supply across multi-year production cycles.

Supply support for TT400N26KOFHPSA1 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 solutions, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

This thyristor module belongs to Infineon's "Netz-Thyristor-Modul" product line, engineered specifically for high-reliability, high-current phase-angle control in industrial AC/DC conversion - emphasizing thermal robustness, voltage endurance, and gate drive simplicity.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum case temperature (TC) is 125°C, as defined by the 125°C maximum junction temperature (Tvj max) and thermal resistance limits. At ITAVM = 400 A and TC = 85°C, the module operates within safe thermal margins; exceeding 125°C risks irreversible degradation of the AlN isolation and silicon die.

Does TT400N26KOFHPSA1 require external snubber circuits?

No external snubber is required for standard 50/60 Hz line-commutated operation due to its 1000 V/µs critical dv/dt rating and 300 µs turn-off time. Snubbers remain necessary only in high-dv/dt environments (e.g., unfiltered generator outputs or PWM-fed inverters) where transient overshoot exceeds 2700 V.

How is gate drive isolation implemented in this module?

Each gate terminal (G1/G2) is electrically isolated from the baseplate and from each other, with isolation rated to 3.6 kV RMS (1 sec). Gate drive must be referenced to its respective cathode (K1/K2), not common ground - requiring separate isolated gate drivers per arm in B6 configurations.

Can TT400N26KOFHPSA1 be used in parallel configurations?

Parallel operation is not recommended. The module lacks integrated current-sharing features (e.g., matched rT or dynamic balancing), and its pressure-contact design does not support synchronized thermal expansion across multiple units. Parallel use would risk current imbalance and thermal runaway without active current monitoring and individual gate timing control.