Infineon Technologies IJW120R100T1FKSA1

Overview

IJW120R100T1FKSA1 from Infineon is a 1200 V, 100 mΩ silicon carbide junction field-effect transistor (SiC JFET) with normally-on operation, ultra-low gate charge (72 nC), and 175 °C maximum junction temperature. It features an integrated fast body diode, low intrinsic capacitance, and high dV/dt ruggedness (80 V/ns), enabling high-efficiency, high-frequency DC/DC and solar inverter stages.

For engineers reviewing the IJW120R100T1FKSA1 datasheet, IJW120R100T1FKSA1 pinout, IJW120R100T1FKSA1 application, or IJW120R100T1FKSA1 equivalent, key selection criteria include gate voltage window (-19.5 V to +2 V), R_DS(on) temperature stability (1.6× increase from 25 °C to 100 °C), short-circuit ruggedness, and cascode/direct-drive compatibility for voltage-source inverters.

Technical Context

This SiC JFET operates as a normally-on power switch requiring negative gate bias (–12 V to –15 V threshold) for turn-off and zero-volt gate drive for turn-on. Its bipolar gate junction enables fast switching with minimal Miller effect, while monolithic integration of a SiC body diode delivers near-zero reverse recovery (Q_rr load-independent).

Thermal performance is defined by R_thJC = 0.78 K/W and rated for continuous drain current up to 26 A at T_C = 25 °C. Gate loop resistance must remain ≤5.1 Ω for safe turn-off, and device binning (bin1–bin3, ±1 V V_GS(th) spread) mandates same-bin paralleling to ensure thermal balance.

Key Specifications

Pinout & Package

Package: PG-TO247-3 (standard through-hole power package with isolated mounting flange, JEDEC TO-247 outline, 60 Ncm screw torque rating).

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3M0065120K and IXTH120N10S, IJW120R100T1FKSA1 delivers superior efficiency at high frequency due to lower E_oss and zero Q_rr, but demands negative gate biasing-making it optimal for high-reliability, high-density solar and EV charging systems where thermal headroom and EMI control are critical.

Availability

IJW120R100T1FKSA1 is available at Aetrix Electronics and suitable for solar inverters, bidirectional DC/DC converters, and industrial motor drives requiring stable component supply, long-term lifecycle support, and compliance with IEC 60721-3-4 (4K4H) environmental class.

Supply support for IJW120R100T1FKSA1 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 management, automotive, and industrial control ICs and discrete devices, with global manufacturing and R&D infrastructure.

This part belongs to the CoolSiC™ family of silicon carbide power transistors, designed specifically for high-efficiency, high-power-density systems operating at 1200 V class-including renewable energy, traction, and industrial power conversion.

FAQ

What gate drive voltage range is required for reliable operation?

The IJW120R100T1FKSA1 requires a gate-source voltage between –19.5 V and +2 V. Turn-off is achieved with –12 V to –15 V (bin-dependent), while turn-on occurs at 0 V. Exceeding +2.5 V forward-biases the gate junction, causing controllable gate current; exceeding –23 V induces reverse breakdown. Gate loop resistance must stay ≤5.1 Ω for safe turn-off.

Can this SiC JFET be used without a cascode configuration?

Yes-it supports direct drive with dedicated negative-voltage gate drivers (e.g., 1EDI30J12Cx). Unlike cascode setups, direct drive eliminates LV MOSFET switching losses and enables full control of the JFET's miller plateau. Startup sequencing must ensure initial gate bias is negative to prevent unintended turn-on before auxiliary supply stabilization.

How does the integrated body diode compare to discrete SiC Schottky diodes?

The monolithic body diode matches SiC SBD reverse recovery performance (Q_rr ≈ 0, no tail current), but has higher forward voltage (~2.5 V at 10 A) than discrete 1200 V SiC SBDs (~1.7 V). For lowest loss, synchronous rectification (channel conduction during reverse current) is preferred over body diode conduction.

Is paralleling multiple IJW120R100T1FKSA1 devices supported?

Yes-but only devices from the same bin (bin1, bin2, or bin3) may be paralleled. Bins reflect ±1 V V_GS(th) groupings; mixing bins causes unequal current sharing and thermal imbalance. External source inductance must be matched, and gate loops kept symmetric with ≤5.1 Ω total resistance per device.