Infineon Technologies T390N14TOFXPSA1

Overview

T390N14TOFXPSA1 from Infineon Technologies is a phase-control thyristor designed for high-power AC line commutation in industrial motor drives, static VAR compensators, and medium-voltage rectifier systems. It delivers 1400 V repetitive peak off-state voltage (VDRM/VRRM), 860 A RMS on-state current (ITRMS), and 4900 A non-repetitive surge current (ITSM) at 25°C with two-sided heatsink cooling.

For engineers reviewing the T390N14TOFXPSA1 datasheet, T390N14TOFXPSA1 pinout, T390N14TOFXPSA1 application, or T390N14TOFXPSA1 equivalent, key selection criteria include gate trigger current (≤150 mA), critical dv/dt rating (1000 V/µs), junction-to-case thermal resistance (0.055 °C/W), and forced-commutated turn-off time (200 µs).

Technical Context

This thyristor operates as a latching, gate-controlled unidirectional switch in phase-angle controlled AC power circuits. Its design supports line-frequency (50/60 Hz) operation with sinusoidal conduction angles from 30° to 180°, requiring precise gate pulse timing (≤3 µs delay) and robust immunity to false triggering (dv/dt ≥1000 V/µs, di/dt ≥150 A/µs).

Thermal management relies on pressure-contact silicon pellet construction with clamping force of 3–6 kN and dual-sided heatsinking. The device's on-state characteristic follows a defined polynomial (A=0.9486, B=6.089×10⁻⁴, C=−0.05553, D=0.02294) enabling accurate conduction loss modeling up to 1900 A.

Key Specifications

Pinout & Package

Package: TO-200AA (isolated stud-mount, pressure-contact thyristor with anode/cathode/gate terminals and auxiliary cathode). Mechanical outline per Infineon Annex Page 3; clamping force 3–6 kN; weight ≈70 g; creepage distance 6 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT140N14KOF and T390N16TOF, T390N14TOFXPSA1 uniquely combines 860 A RMS rating, 1000 V/µs dv/dt immunity, and auxiliary cathode for enhanced gate noise rejection-critical in EMI-heavy industrial environments where false triggering must be eliminated.

Availability

T390N14TOFXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, static VAR compensators, medium-voltage rectifiers, and DC traction power supplies requiring stable component supply across long production lifecycles.

Supply support for T390N14TOFXPSA1 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 belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-current phase-control applications in utility-grade power conversion and heavy industrial automation.

FAQ

What is the maximum allowable junction temperature for T390N14TOFXPSA1?

The maximum junction temperature (Tvj max) is 125°C, as specified in the thermal properties section of the official datasheet. This limit applies under all operating conditions including surge events and defines the upper boundary for thermal design calculations. Exceeding this temperature risks irreversible degradation of the silicon die and bond wire integrity.

Does T390N14TOFXPSA1 require a heatsink, and what cooling configuration is validated?

Yes, mandatory heatsinking is required due to its 300+ W conduction losses at rated current. The datasheet validates two-sided cooling (anode + cathode) with 0.055 °C/W RthJC, single-sided anode or cathode cooling (0.092–0.162 °C/W), and specifies clamping force of 3–6 kN for optimal thermal contact. No operation without heatsink is permitted.

Can T390N14TOFXPSA1 be used in DC applications?

Yes-it supports DC conduction with ITAVM = 550 A at TC = 55°C and θ = 180°, but requires active forced-air or liquid cooling due to higher steady-state losses versus AC operation. The device lacks intrinsic turn-off capability, so external commutation circuitry (e.g., LC snubber or auxiliary thyristor) is mandatory for DC switching.

What gate drive requirements must be met to ensure reliable triggering?

Gate drive must deliver ≥0.6 A peak current with di/dt ≥0.6 A/µs for ≤20 µs pulse width, meeting IGT ≤150 mA and VGT ≤2 V at 25°C. A low-impedance path (<1 Ω) to the auxiliary cathode is recommended to suppress ground bounce and maintain VGD < 0.25 V under noise.