Infineon Technologies TTW3C115N16LOFHOSA1

Overview

TTW3C115N16LOFHOSA1 from Semikron is a phase-control thyristor module in ISOPACK housing, rated for 1600 V repetitive peak off-state voltage (VDRM/VRRM), 115 A RMS current per arm at TC = 85°C, and 1000 A non-repetitive surge current (ITSM). It integrates glass-passivated silicon chips with internal Al₂O₃ insulation and an integrated 5 kΩ NTC temperature sensor, used in industrial AC power control circuits such as motor speed regulators and heating system controllers.

For engineers reviewing the TTW3C115N16LOFHOSA1 datasheet, TTW3C115N16LOFHOSA1 pinout, TTW3C115N16LOFHOSA1 application, or TTW3C115N16LOFHOSA1 equivalent, key selection criteria include its 0.083 °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 module operates in phase-angle controlled AC line applications, where gate-triggered conduction enables precise power regulation. Its 125 °C maximum junction temperature, 190 µs circuit-commutated turn-off time (tq), and 1.81 V max on-state voltage at 150 A define switching and conduction behavior under full-load conditions.

The integrated NTC sensor (R25 = 5 kΩ, ±5% tolerance) provides real-time junction-temperature estimation via the measured (Tvj − TSensor) differential curve. Thermal design relies on validated transient ZthJC curves and DC thermal resistance values for both per-module (0.078 °C/W) and per-chip (0.470 °C/W) configurations.

Key Specifications

Pinout & Package

TTW3C115N16LOFHOSA1 uses the ISOPACK package: isolated double-sided copper baseplate, Al₂O₃ ceramic insulation, glass-passivated Si chips, and M1/M2 screw terminals. Dimensions and mechanical layout conform to Semikron's ISOPACK standard (see Appendix Page 3 of BIP PPE 4 rev.2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDW3H115N16 and SKKT105/16E, TTW3C115N16LOFHOSA1 uniquely combines full electrical equivalence with integrated thermal sensing and superior mechanical robustness-reducing BOM count and improving long-term reliability in thermally demanding environments.

Availability

TTW3C115N16LOFHOSA1 is available at Aetrix Electronics and suitable for industrial motor speed control, resistive heating regulation, static VAR compensation, and transformer tap changer interface requiring stable component supply across multi-year production cycles.

Supply support for TTW3C115N16LOFHOSA1 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, energy, and traction applications since 1951.

This part belongs to Semikron's ISOPACK thyristor module family, engineered for ruggedized AC power control in harsh environments-including ambient temperatures from −40 °C to +125 °C and high-vibration industrial settings.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature depends on RMS current: at 115 A IRMS, TC must not exceed 85 °C; at 141 A, TC is limited to 73 °C. Derating curves in the datasheet (Page 6) define exact TC limits across the full 0–115 A operating range under specified heatsink conditions (KM11/KM33 with defined airflow).

How is the integrated NTC sensor calibrated for junction temperature estimation?

The NTC sensor is factory-matched to the thyristor die; its resistance-vs-temperature curve (Page 8) and the (Tvj − TSensor) differential chart (Page 7) provide the empirical relationship. Users apply these curves with measured RSensor to compute actual Tvj-no additional calibration is required beyond standard NTC biasing and ADC scaling.

Can TTW3C115N16LOFHOSA1 be used in DC applications?

No-it is designed exclusively for AC phase-control operation. Its 1600 V VDRM/VRRM rating applies only to repetitive AC blocking; DC blocking capability is not characterized or guaranteed. For DC switching, Semikron's SKM series IGBT modules or dedicated DC thyristors should be selected.

What gate drive requirements ensure reliable turn-on at full rated current?

A minimum gate trigger current of 0.6 A with di/dt ≥ 0.6 A/µs and pulse width ≥ 10 µs is required to guarantee turn-on within 1.2 µs at Tvj = 25 °C. At Tvj = 125 °C, gate current must increase to ≥1.2 A to maintain timing margin; gate drivers must sustain ≥2.5 V VGT under load.