Infineon Technologies IKY40N120CS6XKSA1

Overview

IKY40N120CS6XKSA1 from Infineon is a 1200 V, 40 A TRENCHSTOP™ IGBT6 with integrated soft-recovery anti-parallel diode in PG-TO247-4-2 package. It delivers 1.85 V V_CE(sat) at 25°C, 175°C max junction temperature, and 285 nC gate charge-optimized for high-efficiency hard-switching and resonant topologies in industrial UPS, solar string inverters, and welding equipment.

For engineers reviewing the IKY40N120CS6XKSA1 datasheet, IKY40N120CS6XKSA1 pinout, IKY40N120CS6XKSA1 application, or IKY40N120CS6XKSA1 equivalent, key selection criteria include its positive V_CE(sat) temperature coefficient for stable paralleling, low EMI due to soft switching, and co-packaged diode with 255 ns trr (25°C) and 39 A Irrm for reduced snubber stress.

Technical Context

This IGBT employs sixth-generation Trench & Fieldstop architecture with optimized carrier lifetime control and tailored tail current profile. Its dynamic characteristics-including 315 ns t_d(off), 27 ns t_f, and 1.55 mJ E_off at 25°C-are calibrated for 600 V bus operation with 9 Ω gate resistors and 70 nH stray inductance.

The integrated diode features controlled reverse recovery with 2.60 µC Q_rr and -450 A/µs dirr/dt at 25°C, enabling clean commutation in three-level NPC and T-type inverter legs. Thermal design is supported by 0.30 K/W R_th(j-c) (IGBT) and 0.78 K/W R_th(j-c) (diode), allowing high-power density layouts.

Key Specifications

Pinout & Package

PG-TO247-4-2 package with 4 terminals: three main power pins (Collector, Emitter, Emitter-Sense) and one dedicated gate pin. The Kelvin emitter configuration separates high-current and sense paths to eliminate PCB trace resistance impact on gate control.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage IGBT switching applications.

Compared with IXGN40N120A3 and STGW40H12DLF, IKY40N120CS6XKSA1 offers superior switching efficiency (lower E_ts), built-in Kelvin sensing for precise gate control, and a softer diode enabling simpler EMI filtering-making it optimal for space-constrained, high-reliability industrial converters.

Availability

IKY40N120CS6XKSA1 is available at Aetrix Electronics and suitable for industrial UPS, three-level solar string inverters, and welding power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for IKY40N120CS6XKSA1 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 AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

This device belongs to the TRENCHSTOP™ IGBT6 family, engineered specifically for high-efficiency, high-reliability medium-power converters operating above 600 V DC-link voltage with demanding thermal and EMI constraints.

FAQ

What is the purpose of the fourth pin (Emitter-Sense) in the PG-TO247-4-2 package?

The Emitter-Sense pin provides a dedicated Kelvin connection to the IGBT's internal emitter node, decoupling gate drive feedback from high-current emitter path voltage drops. This enables precise V_GE control during fast switching, reducing timing uncertainty and preventing false turn-on caused by L_EE×di/dt noise-critical for reliable operation in parallel configurations and high-dV/dt environments.

How does the soft-recovery diode improve system-level reliability compared to standard FRD counterparts?

The co-packaged diode exhibits controlled reverse recovery with low Irrm (39 A) and moderate dirr/dt (-450 A/µs), minimizing voltage overshoot and oscillation during commutation. This reduces stress on snubber components and gate drivers, lowers radiated EMI, and extends capacitor lifetime-verified in 10,000-hour accelerated life tests under 175°C junction temperature cycling in solar inverter reference designs.

Can IKY40N120CS6XKSA1 be operated at 100% rated current with T_c = 100°C without derating?

Yes-the datasheet specifies I_C = 40 A at T_c = 100°C as the absolute maximum continuous rating. This assumes proper mounting (0.5 N·m torque, thermal interface material ≤ 0.1 mm thickness, flatness ≤ 25 µm), adequate heatsink thermal resistance (<0.5 K/W), and ambient airflow ≥ 2 m/s. Derating is only required if any of these conditions cannot be met.

Is this device qualified for use in safety-critical industrial applications requiring functional safety compliance?

IKY40N120CS6XKSA1 is qualified per JEDEC47/20/22 for industrial applications and supports failure mode analysis per IEC 61800-5-2. While not pre-certified to ISO 26262 or IEC 61508, its 175°C T_vjmax, robust short-circuit withstand time (≥10 µs at 1200 V), and documented FIT rate (120 failures per billion hours at 100°C) enable integration into SIL2-capable motor drives and UPS systems when combined with appropriate system-level diagnostics and redundancy.