Infineon Technologies TT251N16KOFHPSA1

Overview

TT251N16KOFHPSA1 from Infineon Technologies is a press-pack phase-control thyristor module rated for 1600 V repetitive peak off-state voltage (VDRM/VRRM), 250 A average on-state current at TC = 85 °C, and 9100 A non-repetitive surge current (ITSM). It features electrically insulated baseplate, pressure-contact silicon pellet construction, and is designed for high-power AC line control in industrial drive rectifiers and static power controllers.

For engineers reviewing the TT251N16KOFHPSA1 datasheet, TT251N16KOFHPSA1 pinout, TT251N16KOFHPSA1 application, or TT251N16KOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.124 K/W), critical dv/dt rating (1000 V/µs), gate trigger voltage (≤2.0 V), and crowbar-capable surge handling in high-energy fault protection circuits.

Technical Context

This dual-thyristor press-pack module implements line-synchronized phase-angle control in high-current AC power conversion. Its pressure-contact die assembly enables robust thermal cycling performance and eliminates wire-bond failure mechanisms common in soldered packages.

It operates with gate-controlled turn-on only and requires external commutation or natural zero-crossing for turn-off. The module supports both two-pulse (B2) and six-pulse (B6) bridge configurations, with validated derating curves for case temperature versus ITAV across conduction angles from 30° to 180°.

Key Specifications

Pinout & Package

TT251N16KOFHPSA1 is housed in an industrial-standard press-pack module with electrically insulated aluminum nitride (AlN) baseplate, 50 mm × 70 mm footprint, and M1 mechanical mounting (5 Nm torque). Terminals are arranged for dual-arm configuration with isolated gate and main terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT251N16KOFHPSA1, the TT251N18KOIHPSA1 offers higher blocking voltage without thermal or footprint trade-offs, while the TD251N16KOFHPSA1 reduces gate drive complexity at the expense of bridge topology support - both require revalidation of firing timing and heatsink mounting.

Availability

TT251N16KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, drive rectifiers, crowbar protection circuits, and static power controllers requiring stable component supply across industrial OEM production cycles.

Supply support for TT251N16KOFHPSA1 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 infrastructure.

This part belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized industrial AC power control - emphasizing reliability under thermal cycling, high dv/dt immunity, and press-pack mechanical integrity in mission-critical energy systems.

FAQ

What is the maximum allowable junction temperature for TT251N16KOFHPSA1?

The maximum junction temperature (Tvj max) is 125 °C, as specified in the Infineon technical information document revision 3.2. Operation beyond this limit risks irreversible degradation of the silicon die and pressure-contact interface. Derating curves in the datasheet define safe ITAVM limits at elevated case temperatures to ensure Tvj remains within specification.

Does TT251N16KOFHPSA1 require forced air cooling?

No - it does not mandate forced air cooling, but thermal design must achieve ≤0.124 K/W total thermal resistance from junction to ambient (RthJA) to sustain 250 A at TC = 85 °C. Typical implementation uses a water-cooled or large finned heatsink with thermal interface material; airflow improves margin but is not required if passive conduction meets RthCA targets per the published derating charts.

Can TT251N16KOFHPSA1 be used in a single-phase full-wave rectifier?

Yes - its dual-arm configuration supports single-phase full-wave (center-tap or bridge) rectification. Each arm handles one half-cycle; gate signals must be phased 180° apart. The module's 0.124 K/W RthJC per arm and 9100 A ITSM enable robust operation under asymmetrical loading and surge conditions typical in single-phase industrial supplies.

What is the recommended gate drive circuit for TT251N16KOFHPSA1?

A pulse-transformer–isolated or optocoupler-based gate driver delivering ≥1 A peak current for ≥20 µs is recommended to ensure reliable turn-on across temperature and aging. The datasheet specifies VGT ≤ 2.0 V and IGT ≤ 200 mA at 25 °C, but design margin requires drivers capable of 400 mA minimum to handle worst-case Tvj = 125 °C and parameter spread. Snubber networks on gate terminals suppress false triggering from dv/dt coupling.