Infineon Technologies TZ500N12KOFHPSA1

Overview

TZ500N12KOFHPSA1 from Semikron is a phase-control thyristor module rated for 500 A average on-state current (ITAVM) at TC = 85°C, 1200 V repetitive peak off-state voltage (VDRM/VRRM), and 17 kA non-repetitive surge current (ITSM). It features pressure-contact silicon pellet construction with aluminum nitride (AlN) internal isolation, designed for high-power AC line-commutated rectification in industrial motor drives and DC power supplies.

For engineers reviewing the TZ500N12KOFHPSA1 datasheet, TZ500N12KOFHPSA1 pinout, TZ500N12KOFHPSA1 application, or TZ500N12KOFHPSA1 equivalent, key selection criteria include verified gate trigger parameters (IGT ≤ 250 mA, VGT ≤ 2.2 V), critical dv/dt rating (1000 V/µs), thermal resistance (RthJC ≤ 0.065 °C/W), and B2/B6 bridge configuration compatibility.

Technical Context

This dual-thyristor module implements a back-to-back (anti-parallel) configuration for AC phase control, supporting both two-pulse (B2) and six-pulse (B6) bridge topologies. Its 125 °C maximum junction temperature and 0.27 mΩ slope resistance enable stable conduction under high RMS current (ITRMSM = 1050 A) and high di/dt stress (critical rate of rise = 200 A/µs).

The module uses AlN ceramic isolation and mechanical pressure contact to ensure low thermal resistance and robust transient thermal impedance (ZthJC). Its 3.0 kV RMS insulation test voltage and 15 mm creepage distance meet industrial safety requirements for medium-voltage AC systems up to 690 V mains.

Key Specifications

Pinout & Package

Package: SKiiP® 3-phase thyristor module in insulated press-pack housing with M1 (5 Nm) mechanical and M2 (12 Nm) terminal mounting screws; weight 900 g; creepage distance 15 mm; AlN internal isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKKT 500/12, TZ500N12KOFHPSA1 offers superior transient immunity and thermal performance; compared with T1500N12TOF, it provides better gate drive compatibility and smaller form factor at the expense of peak current headroom.

Availability

TZ500N12KOFHPSA1 is available at Aetrix Electronics and suitable for industrial motor soft starters, DC electroplating supplies, medium-voltage UPS rectifiers, and AC heating regulators requiring stable component supply under high thermal and electrical stress.

Supply support for TZ500N12KOFHPSA1 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

Semikron is a German power semiconductor manufacturer specializing in high-reliability modules for industrial, renewable energy, and traction applications since 1951.

TZ500N12KOFHPSA1 belongs to the SKiiP® thyristor module product line, engineered for ruggedized phase-angle control in high-current AC power conversion systems where long-term thermal cycling stability is critical.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum case temperature (TC) is not fixed but depends on ITAVM and conduction angle Θ. At 500 A ITAVM and 180° conduction (sinusoidal), TC must not exceed 85°C per datasheet derating curves. With forced cooling (KM17 + Papst 4650N), TC can reach 100°C while maintaining Tvj ≤ 125°C.

Does TZ500N12KOFHPSA1 require a heatsink? If so, what thermal resistance is needed?

Yes - mandatory heatsinking is required. For 500 A ITAVM at 85°C case temperature, total thermal resistance (RthJC + RthCH + RthHA) must be ≤ 0.125 °C/W. With RthJC = 0.065 °C/W and RthCH = 0.02 °C/W, the heatsink-to-ambient resistance (RthHA) must be ≤ 0.04 °C/W under natural convection or ≤ 0.025 °C/W with forced air.

Can this module be used in a single-phase AC regulator without modification?

Yes - the dual-thyristor structure supports single-phase back-to-back operation. Gate terminals G1 and G2 must be driven with complementary 180°-shifted firing pulses. The module's 15 mm creepage and 3.0 kV isolation permit direct connection to 230/400 V AC mains without auxiliary isolation transformers.

What gate drive circuitry is recommended for reliable triggering?

A pulse transformer or optocoupled SCR driver delivering ≥1 A peak gate current with di/dt ≥1 A/µs and minimum pulse width ≥20 µs is required. The datasheet specifies IL ≤ 1500 mA and tgd ≤ 4 µs, confirming compatibility with standard MOC3063 or IL420-based drivers when properly buffered with 1 A capable triac drivers.