Infineon Technologies T3800N16TOFVTXPSA1

Overview

T3800N16TOFVTXPSA1 from Infineon Technologies is a high-power phase-control thyristor designed for medium-voltage AC line commutated rectification and soft-start applications. It delivers 3800 A average on-state current (ITAVM) at TC = 85 °C, 1600–1800 V repetitive peak off-state voltage (VDRM/VRRM), and 67 kA non-repetitive surge current (ITSM) with 7.8 K/kW junction-to-case thermal resistance - deployed in industrial drive rectifiers and medium-voltage converters.

For engineers reviewing the T3800N16TOFVTXPSA1 datasheet, T3800N16TOFVTXPSA1 pinout, T3800N16TOFVTXPSA1 application, or T3800N16TOFVTXPSA1 equivalent, key selection criteria include clamping force range (42–95 kN), gate trigger current ≤250 mA, critical dv/dt rating of 1000 V/µs, and two-sided cooling compatibility for high-reliability power conversion systems.

Technical Context

This thyristor operates as a line-commutated, gate-controlled semiconductor switch optimized for phase-angle control in high-current AC systems. Its design supports full blocking capability at 50/60 Hz across –40 °C to +135 °C junction temperature, with high DC blocking stability and robust surge immunity up to 67 kA for 10 ms.

The device uses a silicon pellet with pressure-contact construction and dual-side heat dissipation. Gate triggering follows IEC 60747-6 standards, requiring ≤2.5 V gate trigger voltage and sustaining ≥0.25 V non-trigger voltage under 0.5×VDRM reverse bias - enabling reliable turn-on in noisy industrial environments.

Key Specifications

Pinout & Package

Package: Pressure-contact, disc-type, double-sided cooled thyristor with 111 mm max diameter, 75 mm contact diameter, and 26.5 mm height. Requires precision mounting with calibrated clamping force.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT1600N16KOF and T5800N16TOF, the T3800N16TOFVTXPSA1 provides optimal balance of current capacity, thermal performance, and mechanical compatibility in standard 111 mm disc stacks - avoiding both underutilization and costly mechanical requalification.

Availability

T3800N16TOFVTXPSA1 is available at Aetrix Electronics and suitable for motor soft starters, medium-voltage converters, and industrial drive rectifiers requiring stable component supply, long-lifecycle support, and traceable sourcing for safety-critical power systems.

Supply support for T3800N16TOFVTXPSA1 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 devices, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

This part belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-current phase-control applications in medium-voltage industrial power conversion - emphasizing thermal robustness, surge immunity, and mechanical repeatability under continuous duty.

FAQ

What is the maximum allowable clamping force for T3800N16TOFVTXPSA1?

The specified clamping force range is 42–95 kN. Exceeding 95 kN risks mechanical deformation of the silicon pellet or housing, while forces below 42 kN increase contact resistance and thermal impedance, potentially causing localized overheating and premature failure. Proper torque calibration of mounting hardware is mandatory per Infineon's application note AN2018-07.

Does T3800N16TOFVTXPSA1 support single-sided cooling?

Yes, but with significant thermal derating: RthJC rises to 14.6–18.3 K/kW depending on anode- or cathode-sided cooling, reducing maximum ITAVM by ~35% at TC = 85 °C. Two-sided cooling is strongly recommended to achieve the rated 3800 A and maintain junction temperature ≤135 °C under continuous operation.

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

A minimum gate trigger current of 250 mA (≤2.5 V) with diG/dt ≥1 A/µs is required at 25 °C. At maximum junction temperature (135 °C), gate sensitivity decreases; thus, drive circuits must deliver ≥350 mA pulses with <4 µs delay and sustain ≥0.25 V non-trigger voltage under 0.5×VDRM to prevent false turn-on.

How does the auxiliary cathode terminal (#5) function in practical layouts?

Terminal #5 provides a dedicated low-inductance return path for gate drive signals and snubber networks, minimizing ground loop interference and improving dv/dt immunity. In multi-thyristor stacks, it enables independent gate referencing per device - critical for precise firing angle synchronization in 12- or 24-pulse rectifier systems.