Infineon Technologies T3801N36TOFVTXPSA1

Overview

T3801N36TOFVTXPSA1 from Infineon Technologies is a phase-control thyristor designed for high-power AC line commutation in medium-voltage drive rectifiers and crowbar protection circuits. It delivers V_DRM/V_RRM = 3600 V, I_TAVM = 3830 A at T_C = 85°C, and I_TSM = 91 kA (10 ms), with v_T0 = 0.826 V and r_T = 0.143 mΩ, enabling robust operation in industrial motor drives and grid-tied converters.

For engineers reviewing the T3801N36TOFVTXPSA1 datasheet, T3801N36TOFVTXPSA1 pinout, T3801N36TOFVTXPSA1 application, or T3801N36TOFVTXPSA1 equivalent, key selection criteria include verified 3600 V blocking capability, 91 kA surge current rating, two-sided cooling thermal resistance of 4.5 K/kW, gate trigger current ≤350 mA, and clamping force range of 63–91 kN for pressure-contact mounting.

Technical Context

This thyristor operates as a line-commutated, gate-controlled switch in phase-angle controlled rectification and load-commutated inverter topologies. Its design supports full 50/60 Hz blocking over –40°C to +125°C junction temperature, with critical di/dt capability of 300 A/µs and dv/dt rating of 1000 V/µs - ensuring reliable turn-on under high di/dt and immunity to false triggering during voltage transients.

The device uses a silicon pellet with double-sided pressure contact packaging, requiring mechanical clamping (63–91 kN) between anode and cathode heat sinks. Its transient thermal impedance Z_thJC is characterized analytically across seven time constants, supporting accurate loss and temperature modeling for DC and pulsed conduction in high-current rectifier bridges.

Key Specifications

Pinout & Package

Package: Pressure-contact, disc-type thyristor with double-sided cooling interface, 151.5 mm diameter, 26 mm height, 100 mm contact diameter, and 2.5 kg mass. Requires external mechanical clamping between heatsinks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT380N36KOF and T3801N36KOFTL, the T3801N36TOFVTXPSA1 uniquely combines 3830 A RMS rating, 4.5 K/kW two-sided thermal resistance, and 63–91 kN clamping specification - making it the sole option qualified for production-grade medium-voltage drive rectifiers demanding full 3.6 kV blocking and 91 kA fault tolerance.

Availability

T3801N36TOFVTXPSA1 is available at Aetrix Electronics and suitable for high-current rectifiers, medium-voltage drive systems, and crowbar protection circuits requiring stable component supply across extended industrial lifecycles.

Supply support for T3801N36TOFVTXPSA1 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 semiconductors, microcontrollers, and security solutions for industrial, automotive, and energy infrastructure markets.

This part belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-current phase-control applications in utility-scale power conversion and heavy industrial drive systems.

FAQ

What is the recommended clamping force range for T3801N36TOFVTXPSA1?

The device requires mechanical clamping between anode and cathode heat sinks within 63–91 kN. This range ensures optimal contact resistance, thermal transfer, and long-term reliability under thermal cycling. Exceeding 91 kN risks ceramic insulator fracture; below 63 kN increases forward voltage drop and localized heating. Torque values depend on bolt grade and thread geometry per Infineon's mounting guide.

Does T3801N36TOFVTXPSA1 support forced-air or liquid cooling?

Yes - its two-sided pressure-contact package is compatible with both forced-air and liquid-cooled heatsinks, provided surface flatness ≤0.05 mm and hardness ≥HB 150. Thermal performance data assumes DC or two-sided sinusoidal cooling; liquid cooling typically achieves 10–15% lower R_thCH versus forced air at equivalent flow rates and ΔT.

What gate drive requirements must be met for reliable turn-on?

A minimum gate trigger current of 3 A with di/dt ≥6 A/µs and pulse width ≥20 µs is required. Gate voltage must reach ≥2.5 V within 2 µs (t_gd max). The auxiliary cathode (terminal 5) must be used as the gate return path to minimize noise coupling. Peak gate power must stay below 60 W for 0.5 ms pulses per the P_GM curve on page 7.

Can T3801N36TOFVTXPSA1 be paralleled with other thyristors?

Parallel operation is feasible only with strict matching: identical V_DRM, v_T characteristics, and gate drive timing (≤100 ns skew). Dynamic current sharing requires individual gate resistors and matched snubber networks. Infineon does not recommend parallel use without full system-level validation including thermal imaging and transient current measurement under worst-case load conditions.