Infineon Technologies T2871N80TOHXPSA1

Overview

T2871N80TOHXPSA1 from Infineon Technologies is a high-power phase-control thyristor designed for line-commutated HVDC and medium-voltage drive rectifiers. It delivers 2620 A average on-state current at 85°C case temperature, 7500–8000 V repetitive peak blocking voltage, and 93 kA surge current capability, operating reliably in static var compensation (SVC) systems with bidirectional cooling.

For engineers reviewing the T2871N80TOHXPSA1 datasheet, T2871N80TOHXPSA1 pinout, T2871N80TOHXPSA1 application, or T2871N80TOHXPSA1 equivalent, key selection criteria include clamping force range (90–130 kN), junction-to-case thermal resistance (4.3 K/kW), critical di/dt (300 A/µs), and gate trigger current limit (350 mA).

Technical Context

This thyristor employs pressure-contact silicon pellet construction with dual-sided heat sinking and is rated for full 50/60 Hz blocking over –40°C to +125°C junction temperature. Its 550 µs circuit commutated turn-off time and 22 mAs recovered charge support controlled commutation in load-commutated inverters.

The device features a low on-state slope resistance of 0.336 mΩ and threshold voltage of 1.267 V at maximum junction temperature, enabling precise conduction modeling via its four-parameter on-state characteristic equation (A=0.72998, B=0.000111, C=–0.01889, D=0.02575).

Key Specifications

Pinout & Package

Package: Disc-type, double-side cooled, press-pack thyristor with 172.5 mm max diameter, 115 mm contact diameter, and 35 mm height. Requires mechanical clamping force of 90–130 kN.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT1700N14KOF and SKKT 92/18 E, T2871N80TOHXPSA1 provides 5.7× higher blocking voltage and 2.8× higher average current, making it uniquely suitable for utility-scale HVDC and SVC-where alternatives require series/parallel stacking that increases complexity, failure risk, and thermal imbalance.

Availability

T2871N80TOHXPSA1 is available at Aetrix Electronics and suitable for high-voltage direct current transmission (HVDC), static var compensation (SVC), and medium-voltage drive rectification requiring stable component supply across extended production lifecycles.

Supply support for T2871N80TOHXPSA1 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 sensor 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-controlled applications in utility-grade power conversion systems including HVDC valves and static compensators.

FAQ

What is the required clamping force for T2871N80TOHXPSA1 installation?

The device requires a mechanical clamping force between 90 kN and 130 kN to ensure optimal thermal contact and current sharing across the pressure-contact silicon pellet. Under-torque risks increased on-state voltage and localized heating; over-torque may deform the copper housing or damage internal interfaces. Force must be applied uniformly using calibrated hydraulic tools per Infineon's mounting instructions.

Does T2871N80TOHXPSA1 support gate-assisted turn-off?

No-T2871N80TOHXPSA1 is a conventional phase-control thyristor and cannot be turned off by gate signal. Turn-off relies entirely on natural current zero-crossing (line commutation) or external forced commutation circuits. Its 550 µs turn-off time (t_q) and 22 mAs recovered charge (Q_r) are parameters for designing such commutation networks, not indicators of gate-controlled shutdown capability.

How is the auxiliary cathode (terminal 5) used in circuit design?

Terminal 5 (Hilfskathode) provides a dedicated low-inductance return path for gate drive current, decoupling gate loop impedance from main cathode current paths. It must be connected directly to the gate driver's cathode reference with minimal trace length-typically via coaxial gate cable shield or dedicated low-L strap-to maintain 300 A/µs di/dt immunity and prevent false triggering during high dv/dt transients.

Can T2871N80TOHXPSA1 be operated with single-sided cooling?

Yes-but thermal resistance rises to 7.8 K/kW (anode-side) or 9.6 K/kW (cathode-side), increasing junction temperature by ~3.5–4.5°C per kW of conduction loss versus two-sided cooling. Derating of I_TAVM is mandatory: at 85°C case temperature, single-sided operation reduces usable average current by approximately 22% compared to the rated 2620 A, requiring revised heatsink and airflow specifications.