Infineon Technologies TD500N16KOFXPSA1

Overview

TD500N16KOFXPSA1 from Infineon Technologies is a phase-control thyristor module with pressure-contact construction, rated for 1600 V repetitive peak off-state voltage (VDRM/VRRM), 500 A average on-state current at TC = 85°C, and 17 kA non-repetitive surge current (ITSM). It features electrically insulated baseplate, 0.35 mΩ slope resistance, and 0.055 K/W junction-to-case thermal resistance - designed for high-reliability industrial power control in soft starters and static switches.

For engineers reviewing the TD500N16KOFXPSA1 datasheet, TD500N16KOFXPSA1 pinout, TD500N16KOFXPSA1 application, or TD500N16KOFXPSA1 equivalent, key selection criteria include verified VDRM/VRRM rating, ITAVM derating versus case temperature, gate trigger thresholds (IGT ≤ 250 mA, VGT ≤ 2.2 V), and thermal impedance ZthJC transient behavior under 180° conduction angle.

Technical Context

This thyristor module implements a dual-arm, press-pack structure with silicon pellets mounted via pressure contact technology - eliminating wire bonds and enabling high di/dt capability (200 A/µs) and dv/dt immunity (1000 V/µs). Its gate-controlled turn-on is optimized for phase-angle control in AC line-commutated applications, with latching current IL ≤ 1500 mA and holding current IH ≤ 300 mA ensuring robust triggering and conduction maintenance.

Thermal design relies on direct baseplate mounting with TIM interface (RthCH ≤ 0.015 K/W per arm), supporting DC and sinusoidal conduction up to 125°C junction temperature. The module's 60 mm baseplate and 1450 g mass provide mechanical stability and heat-sinking capacity for high-power rectifier and crowbar circuits operating at 50/60 Hz.

Key Specifications

Pinout & Package

TD500N16KOFXPSA1 uses an industrial-standard press-pack module package with 60 mm × 60 mm baseplate, electrically insulated AlN ceramic substrate, and M1 (6 Nm) mechanical mounting screws. Terminal layout follows dual-arm configuration: two main anode/cathode pairs and isolated gate terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT500N16KOFXPSA1, TD500N16KOFXPSA1 offers higher VDRM headroom for 690–800 VAC systems, while TD500N18KOFXPSA1 extends blocking to 1000 VAC - both retain identical thermal and gate drive characteristics, simplifying thermal redesign and driver reuse.

Availability

TD500N16KOFXPSA1 is available at Aetrix Electronics and suitable for soft starter systems, industrial drive rectifiers, crowbar protection circuits, and static AC switching applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TD500N16KOFXPSA1 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 9001 and IATF 16949.

This part belongs to Infineon's High-Power Thyristor Module product line, engineered for ruggedized, high-current AC power control in mission-critical industrial infrastructure where reliability, thermal stability, and surge immunity are mandatory.

FAQ

What is the maximum allowable case temperature for continuous operation?

The TD500N16KOFXPSA1 supports continuous operation with case temperature (TC) up to +125°C, as defined by its maximum junction temperature Tvj max = 125°C and thermal resistance RthJC = 0.055 K/W. Derating curves in the datasheet show ITAVM = 500 A is valid only at TC = 85°C; operation above that requires linear current reduction per the TC = f(ITAVM) graph on page 7.

Does this module require forced air cooling or can it operate with natural convection?

Natural convection alone is insufficient for rated current operation. At ITAVM = 500 A, total power dissipation exceeds 2.5 kW per arm. Effective cooling requires a heatsink with RthCA ≤ 0.25 K/W - typically achieved with forced-air cooling (≥ 5 m/s airflow) or liquid-cooled cold plates, as shown in the Ptot vs. TA graphs on pages 8–9.

Can TD500N16KOFXPSA1 be used in anti-parallel configuration for AC switching?

Yes - the module contains two fully isolated thyristor arms (A1/K1 and A2/K2), each with independent gate terminals. When wired anti-parallel (K1→A2, A1→K2), it forms a bidirectional AC switch capable of phase-controlled conduction in both half-cycles, supporting static switch applications up to 1600 V peak and 500 A RMS.

What gate drive voltage and current are required for reliable turn-on?

Reliable triggering requires gate pulse voltage ≥ 2.2 V and peak current ≥ 250 mA at the gate terminal, with minimum pulse width of 20 µs and diG/dt ≥ 1 A/µs. The datasheet specifies tgd ≤ 4 µs under these conditions. Gate resistors must be selected to limit peak current while maintaining sufficient diG/dt - typical values range from 5 Ω to 15 Ω depending on driver voltage.