Infineon Technologies TTW3C145N16LOF

Overview

TTW3C145N16LOF from Semikron is a phase-control thyristor module in ISOPACK housing, rated for 145 A RMS current per arm at TC = 85°C, 1600 V repetitive peak off-state voltage (VDRM/VRRM), and 1250 A non-repetitive surge current (ITSM). It integrates glass-passivated silicon chips with Al₂O₃ internal insulation and an integrated 5 kΩ NTC temperature sensor for thermal monitoring in industrial AC power control circuits.

For engineers reviewing the TTW3C145N16LOF datasheet, TTW3C145N16LOF pinout, TTW3C145N16LOF application, or TTW3C145N16LOF equivalent, key selection criteria include its 0.070 °C/W junction-to-case thermal resistance, 120 A/µs critical di/dt rating, 1000 V/µs critical dv/dt rating, and compatibility with KM11/KM33 heatsinks under forced-air cooling.

Technical Context

This dual-thyristor ISOPACK module supports asymmetrical phase-angle control in line-commutated AC systems. Its 125 °C maximum junction temperature, 190 µs circuit-commutated turn-off time (tq), and 1.87 V max on-state voltage at 200 A define conduction efficiency and commutation margin in 50 Hz industrial heating and motor speed control.

The integrated NTC sensor (R25 = 5 kΩ, ±5% at 25°C) enables real-time junction temperature estimation via (Tvj – TSensor) vs. Ia/IRMS curves. Gate trigger parameters-IGT ≤ 150 mA, VGT ≤ 2.5 V, and tgd ≤ 1.2 µs-support reliable firing with standard pulse transformers or optocoupled drivers.

Key Specifications

Pinout & Package

TTW3C145N16LOF uses a bolt-down ISOPACK package (300 g, 12.5 mm creepage distance) with ceramic Al₂O₃ isolation and soldered Si pellet contacts. Mechanical mounting torque: M1 = 6 Nm ±15%; terminal torque: M2 = 6 Nm (+5%/–10%).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKKT 145/16 E and TT145N16KOF, TTW3C145N16LOF uniquely combines dual-thyristor integration, ceramic isolation, and embedded NTC sensing-reducing BOM count by 3 components and eliminating thermal calibration effort in closed-loop power control designs.

Availability

TTW3C145N16LOF is available at Aetrix Electronics and suitable for industrial AC motor speed control, resistive heating regulation, static VAR compensation, and controlled rectification requiring stable component supply across multi-year production programs.

Supply support for TTW3C145N16LOF 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.

TTW3C145N16LOF belongs to the ISOPACK thyristor module family, engineered for ruggedized phase-angle control in harsh electromagnetic and thermal environments where galvanic isolation and thermal telemetry are mandatory.

FAQ

What is the maximum heatsink temperature allowed for continuous 145 A RMS operation?

The datasheet specifies that 145 A RMS operation is permissible only when case temperature (TC) remains ≤85°C. This corresponds to a heatsink temperature of ≤75°C under typical KM11 mounting with 45 l/s forced air, given RthCK = 0.033 °C/W and RthJC = 0.070 °C/W. Exceeding TC = 85°C reduces IRMS derating per the IRMS vs. TC curve on page 6.

How is the integrated NTC sensor electrically connected and calibrated?

The NTC sensor has two dedicated pins (S1/S2) with R25 = 5 kΩ ±5% at 25°C and R100 = 493 Ω ±5%. Calibration uses the published RSensor vs. TSensor curve (page 8) and the (Tvj – TSensor) vs. Ia/IRMS chart (page 7) to infer junction temperature from measured sensor resistance and load current, eliminating need for separate thermal interface materials or offset adjustments.

Can TTW3C145N16LOF be used in DC applications such as battery charging circuits?

No-it is designed exclusively for AC line-commutated operation. Its 190 µs circuit-commutated turn-off time (tq) relies on natural current zero-crossings. In DC circuits, absence of current reversal prevents self-commutation, leading to latch-up and destructive failure unless paired with active snubber or forced-commutation circuitry not supported by this module's topology.

What gate drive requirements ensure reliable triggering without false turn-on?

Reliable triggering requires ≥0.6 A peak gate current with diG/dt ≥ 0.6 A/µs for ≤10 µs duration, while maintaining VGT ≤ 2.5 V and IGT ≤ 150 mA at 25°C. To prevent false turn-on, gate wiring must be shielded and routed away from main terminals; dv/dt immunity is guaranteed up to 1000 V/µs only when gate-cathode voltage remains below 0.2 V during blocking state.