Infineon Technologies TT500N18KOFXPSA1

Overview

TT500N18KOFXPSA1 from Infineon Technologies is a pressure-contact thyristor module for phase-controlled AC power regulation, rated at 1800 V V_RRM, 500 A I_TAVM (T_C = 85°C), and 17 kA I_TSM surge current. It features electrically insulated baseplate, 0.35 mΩ r_T, and 0.055 K/W R_thJC, deployed in industrial soft starters and static power controllers.

For engineers reviewing the TT500N18KOFXPSA1 datasheet, TT500N18KOFXPSA1 pinout, TT500N18KOFXPSA1 application, or TT500N18KOFXPSA1 equivalent, key selection criteria include repetitive peak voltage rating, RMS on-state current derating vs. conduction angle, gate trigger sensitivity (I_GT ≤ 250 mA), and thermal resistance under forced-cooled mounting conditions.

Technical Context

This double-sided, dual-thyristor module implements phase-angle control in medium-power AC systems using pressure-contact silicon pellet technology. Its 1800 V V_RRM supports 690 VAC three-phase line applications with margin, while the 250 µs typical turn-off time (t_q) enables reliable commutation in B6 six-pulse rectifier topologies.

The module integrates two independent thyristor arms in an industrial-standard package with basic insulation (IEC 61140 Class 1) and 3.6 kV insulation test voltage. Gate drive requires ≤2.2 V V_GT and ≥1500 mA latching current to ensure robust triggering under high dv/dt (1000 V/µs) and di/dt (200 A/µs) transients.

Key Specifications

Pinout & Package

TT500N18KOFXPSA1 uses a pressure-contact industrial module package with isolated copper baseplate (60 mm × 60 mm footprint), weighing 1450 g. Electrical terminals are M2 screw connections (12 Nm torque) for main current paths and DIN 46244 A 2.8 × 0.8 mm flat control terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKKT500/18E and TT600N16KOF, TT500N18KOFXPSA1 offers balanced 1800 V/500 A ratings with industry-standard thermal performance-making it the default choice for 690 VAC soft starters and B6 rectifiers where both voltage margin and current density matter.

Availability

TT500N18KOFXPSA1 is available at Aetrix Electronics and suitable for soft starters, industrial rectifiers, crowbar protection circuits, and static AC switches requiring stable component supply and long-term production continuity.

Supply support for TT500N18KOFXPSA1 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 R&D infrastructure.

This part belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized phase-control applications in motor drives, power conditioning, and grid-connected industrial systems.

FAQ

What is the maximum allowable junction temperature for TT500N18KOFXPSA1?

The maximum junction temperature (T_{vj max}) is 125°C, as specified in the thermal characteristics section of the technical information document. Operation beyond this temperature risks irreversible degradation of the silicon die and pressure-contact interfaces. Thermal design must ensure that transient and steady-state junction temperatures remain below this limit under worst-case load and ambient conditions.

Does TT500N18KOFXPSA1 require forced air or liquid cooling?

No mandatory cooling method is prescribed, but thermal performance depends on heatsink design. At 500 A I_TAVM, the module dissipates ~425 W per arm (based on v_T ≈ 1.45 V and r_T = 0.35 mΩ). A heatsink with R_thCA ≤ 0.25 K/W is required for ambient temperatures up to 50°C-typically achieved with finned aluminum heatsinks and forced air or cold-plate liquid cooling.

Can TT500N18KOFXPSA1 be used in parallel configurations?

Parallel operation is not recommended without active current-sharing circuitry. The module lacks integrated current-balancing features such as matched dynamic parameters or emitter/source ballasting. Uneven current distribution arises from parameter spread in V_T0 (0.85 V max) and r_T (0.35 mΩ max), risking thermal runaway. For higher current, use multi-module systems with individual gate timing control and thermal monitoring.

What gate drive voltage and current are required to reliably trigger TT500N18KOFXPSA1?

A minimum gate trigger voltage of 2.2 V (V_GT max) and current of 250 mA (I_GT max) at 25°C is required for guaranteed turn-on. Drive circuits must deliver ≥1500 mA latching current within 20 µs to maintain conduction after gate signal removal. Gate pulse width should exceed 4 µs (t_gd max) and peak power limited to 60 W for 0.5 ms pulses per the P_GM curve.