Infineon Technologies IDW30S120FKSA1

Overview

IDW30S120FKSA1 from Infineon Technologies is a 1200 V, 30 A silicon carbide (SiC) Schottky diode in TO-247-3 package, designed as a unidirectional power rectifier for high-efficiency switching applications. It delivers zero reverse recovery charge, 1.5 V forward voltage at 30 A and 25°C, 55 nC capacitive charge at 400 V, and operates up to 175°C junction temperature. It is used in CCM PFC stages of industrial SMPS where thermal robustness and high-frequency operation are critical.

For engineers reviewing the IDW30S120FKSA1 datasheet, IDW30S120FKSA1 pinout, IDW30S120FKSA1 application, or IDW30S120FKSA1 equivalent, key selection criteria include its SiC-based zero-recovery behavior, thermal resistance of 0.5 K/W (junction-to-case, per device), and validated surge capability of 146 A at 150°C - all essential for high-power-density, high-reliability rectification designs.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in hard-switched and resonant topologies. Its lack of minority-carrier storage eliminates reverse recovery losses and associated EMI, enabling operation at higher frequencies without snubbers. The device exhibits temperature-independent switching characteristics and maintains low forward voltage drift (1.5 V → 2.4 V) across 25–150°C.

Thermally, it leverages the TO-247-3 package's 0.5 K/W R_thJC (per device) and 62 K/W R_thJA (leaded) to sustain continuous 30 A conduction at T_C < 135°C. Its 1200 V V_RRM, 50 V/ns dv/dt ruggedness, and 1500 µA max reverse leakage at 1200 V/150°C support stable operation in high-voltage DC-link environments.

Key Specifications

Pinout & Package

Package: TO-247-3 (PG-TO247-3), isolated case, screw-mountable with M3/M3.5 torque specification (60 N·cm). Case is electrically connected to Pin 2 (Cathode).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SiC Schottky diode applications.

Compared with C3D03060E and STPSC30H12D, IDW30S120FKSA1 uniquely combines 1200 V rating, dual-anode TO-247-3 layout, lowest V_F (1.5 V), and highest dv/dt immunity (50 V/ns), making it optimal for high-efficiency, high-reliability 1200 V PFC and inverter designs.

Availability

IDW30S120FKSA1 is available at Aetrix Electronics and suitable for CCM PFC rectifiers, solar inverter DC-link stages, industrial UPS output stages, and EV charger front-ends requiring stable component supply and long-term industrial lifecycle support.

Supply support for IDW30S120FKSA1 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 semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and renewable energy markets.

IDW30S120FKSA1 belongs to Infineon's thinQ!™ SiC Schottky Diode product line, engineered specifically for high-efficiency, high-temperature, high-voltage rectification in next-generation power conversion systems.

FAQ

Is IDW30S120FKSA1 compatible with standard TO-247 heatsinks?

Yes. The device uses the industry-standard PG-TO247-3 footprint with M3/M3.5 mounting holes and 60 N·cm torque specification. Its isolated case design allows direct mechanical attachment to heatsinks without electrical isolation pads, provided the cathode (Pin 2 and case) is at the desired reference potential.

What is the maximum recommended PCB trace width for Pin 1 and Pin 3 in high-current layouts?

For 30 A continuous conduction at 135°C case temperature, minimum recommended copper width is 4.5 mm per pin on 2 oz (70 µm) copper with 1 mm thermal via array beneath each pad. Dual-anode configuration (Pins 1 & 3) must be routed symmetrically to balance current sharing within ±5%.

Does IDW30S120FKSA1 require gate driving or external control signals?

No. As a passive unidirectional Schottky diode, IDW30S120FKSA1 conducts when forward-biased and blocks when reverse-biased - no gate signal, bias network, or control logic is needed. Its operation is fully determined by circuit voltage polarity and magnitude.

How does the dual-anode (Pin 1 + Pin 3) configuration affect thermal performance?

The dual-anode structure reduces current density at the bond wires and die edges, lowering localized heating. Combined with the 0.5 K/W R_thJC (per device), this configuration improves thermal cycling reliability and enables 30 A operation with 15–20% lower junction temperature rise compared to single-anode equivalents under identical PCB and heatsink conditions.