Infineon Technologies TT150N26KOFHPSA1

Overview

TT150N26KOFHPSA1 from Semikron is a phase-control thyristor module with dual anti-parallel thyristor configuration in a press-pack package, rated for 2600 V repetitive peak off-state voltage (V_DRM/V_RRM), 150 A average on-state current (I_TAVM) at T_C = 85 °C, and 4500 A non-repetitive surge current (I_TSM). It is engineered for industrial AC power control in medium-voltage motor drives and DC traction rectifiers.

For engineers reviewing the TT150N26KOFHPSA1 datasheet, TT150N26KOFHPSA1 pinout, TT150N26KOFHPSA1 application, or TT150N26KOFHPSA1 equivalent, key selection criteria include critical dv/dt rating (1000 V/µs), junction-to-case thermal resistance (0.062 °C/W per arm), gate trigger current (≤200 mA), and isolation test voltage (3.6 kV RMS/1 sec).

Technical Context

This dual-thyristor module operates in forced-commutated or line-commutated configurations, supporting B2 (two-pulse) and B6 (six-pulse) bridge topologies. Its 125 °C maximum junction temperature and AlN internal insulation enable reliable operation under high thermal stress in rectifier and phase-angle control circuits.

The device features a pressure-contact silicon pellet construction with 17 mm creepage distance and 3.0–3.6 kV isolation, designed for direct mounting onto heatsinks using M2 terminals (12 Nm torque). Its 300 µs typical turn-off time (t_q) and 60 A/µs critical di/dt support controlled commutation in medium-frequency industrial converters.

Key Specifications

Pinout & Package

TT150N26KOFHPSA1 uses a press-pack module package with isolated copper baseplate, AlN ceramic insulation, and M2 screw terminals for main current paths and gate control. Mechanical mounting requires 12 Nm torque on electrical terminals and 5 Nm on mechanical clamping points.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKKT 150/26E and TT162N26KOFHPSA1, TT150N26KOFHPSA1 delivers optimal balance of surge resilience (4500 A), thermal efficiency (0.062 °C/W), and proven field reliability in B6 rectifier duty cycles.

Availability

TT150N26KOFHPSA1 is available at Aetrix Electronics and suitable for industrial rectifiers, DC traction systems, medium-voltage heating controls, and welding power supplies requiring stable component supply and long-life thermal cycling performance.

Supply support for TT150N26KOFHPSA1 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

Semikron is a German power semiconductor manufacturer specializing in high-reliability modules for industrial, traction, and renewable energy applications since 1951.

This part belongs to Semikron's TT-series press-pack thyristor modules, developed specifically for high-power, high-reliability AC/DC conversion in harsh thermal and electrical environments.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (T_C) is 125 °C, corresponding to the 125 °C maximum junction temperature (T_{vj max}) and 0.062 °C/W thermal resistance. At T_C = 85 °C, the device sustains 150 A average on-state current; derating is required above this point per the ITAVM vs. TC curves on page 7 of the datasheet.

How is gate triggering implemented for dual thyristors?

TT150N26KOFHPSA1 provides independent gate terminals G1/K1 and G2/K2, each requiring ≤200 mA trigger current and ≤2 V trigger voltage. The gates are electrically isolated from main terminals and from each other, enabling asynchronous or complementary firing for full-wave AC control in B2/B6 configurations.

Does this module require snubber circuits in standard B6 rectifier use?

Snubbers are recommended for B6 operation due to its 1000 V/µs critical dv/dt rating. While the module tolerates that rate under ideal conditions, real-world line transients and transformer leakage inductance often exceed it; RC snubbers across each thyristor pair suppress overshoot and prevent false turn-on.

Can TT150N26KOFHPSA1 be used in parallel with identical units?

Parallel operation is feasible only with matched dynamic characteristics (dv/dt, di/dt, V_T) and symmetrical busbar layout. The datasheet does not specify paralleling derating factors; Semikron recommends individual thermal monitoring and gate drive synchronization to ensure current sharing within ±10% across modules.