Infineon Technologies T390N16TOFXPSA1

Overview

T390N16TOFXPSA1 from Infineon Technologies is a 1600 V, 860 A RMS phase-control thyristor designed for high-power AC line commutation in industrial rectifiers, motor drives, and static VAR compensators. It features 4250 A non-repetitive surge current (t_P = 10 ms at T_{vj max}), 1000 V/µs critical dv/dt rating, and 150 A/µs critical di/dt capability - enabling robust gate-controlled turn-on under high dv/dt stress in 50/60 Hz medium-voltage systems.

For engineers reviewing the T390N16TOFXPSA1 datasheet, T390N16TOFXPSA1 pinout, T390N16TOFXPSA1 application, or T390N16TOFXPSA1 equivalent, key selection criteria include verified 1600 V repetitive blocking voltage, two-sided cooling thermal resistance of 0.055 °C/W (junction-to-case), gate trigger current ≤150 mA at 25 °C, and validated 200 µs circuit-commutated turn-off time under rated conditions.

Technical Context

This thyristor operates as a semi-controlled power switch in phase-angle controlled AC circuits, requiring precise gate pulse timing to initiate conduction during each half-cycle. Its 0.900 mΩ slope resistance and 0.85 V threshold voltage define its on-state conduction behavior at junction temperatures up to 125 °C.

The device supports bidirectional heat extraction via clamped pressure-contact construction (3–6 kN mounting force) and exhibits 120 × 10³ A²s I²t rating at 25 °C for short-circuit withstand. Its 6 mm creepage distance and 70 g mass reflect design for insulated high-voltage power modules in industrial enclosures.

Key Specifications

Pinout & Package

Package: TO-240AA (isolated press-pack thyristor with anode/cathode/gate terminals and auxiliary cathode). Mounting requires mechanical clamping (3–6 kN) onto heatsinks with thermal interface material.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT160N16KOF, T390N16TOFXPSA1 delivers 19% higher RMS current capacity and 15% better thermal resistance - critical for compact, air-cooled industrial drives. Against T390N18TOFXPSA1, it offers tighter gate drive compatibility and lower system-level EMI due to reduced required gate energy.

Availability

T390N16TOFXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, medium-voltage rectifiers, static VAR compensators, and DC circuit breakers requiring stable component supply under long production lifecycles and high-reliability validation.

Supply support for T390N16TOFXPSA1 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 centers.

This thyristor belongs to Infineon's "Netz-Thyristor" family, engineered specifically for high-power AC line-commutated applications in energy infrastructure, industrial automation, and traction systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (T_C) depends on average on-state current and conduction angle. At 381 A ITAV with 180° sinusoidal conduction and two-sided cooling, T_C must not exceed 85 °C. Derating is required above this point per the published T_C vs. I_TAV curves in the datasheet.

Is auxiliary cathode (terminal 5) mandatory for gate drive reference?

Yes - the auxiliary cathode provides a dedicated low-inductance return path for gate current, minimizing noise coupling into the main cathode loop. Omitting its connection risks erratic triggering or false turn-on under high di/dt conditions, especially in multi-thyristor bridge configurations.

Can this thyristor be used in forced-commutated (GTO-like) circuits?

No - T390N16TOFXPSA1 is a conventional phase-control thyristor without gate turn-off capability. It relies on natural current zero-crossing or external circuit commutation. For active turn-off, discrete GTOs or IGCTs with integrated gate drivers are required.

What clamping force is required for reliable thermal performance?

A mechanical clamping force of 3–6 kN must be applied uniformly across the device's contact surfaces. Under-torque risks thermal runaway due to interfacial hot spots; over-torque may fracture the silicon pellet or deform housing features. Torque specifications assume flat, parallel heatsink surfaces with appropriate thermal paste.