Infineon Technologies AUIRFS6535

Overview

AUIRFS6535 from Infineon is an automotive-qualified N-channel D2PAK (TO-263) HEXFET® Power MOSFET with 300 V V_DS, 148 mΩ typical R_DS(on) at V_GS = 10 V and 11 A, 175 °C maximum junction temperature, and 310 mJ tested single-pulse avalanche energy. It serves as a high-reliability primary switching device in DC-DC converters, motor drivers, and load switches within engine control units and battery management systems.

For engineers reviewing the AUIRFS6535 datasheet, AUIRFS6535 pinout, AUIRFS6535 application, or AUIRFS6535 equivalent, key selection criteria include its 300 V breakdown rating, low conduction loss at elevated temperature, fast switching (t_r = 16 ns, t_f = 10 ns), repetitive avalanche capability up to T_jmax, and automotive-grade thermal robustness under transient load conditions.

Technical Context

This MOSFET employs Infineon's advanced planar HEXFET process optimized for low R_DS(on)/area and enhanced thermal stability. Its gate charge profile (Q_g = 38–57 nC, Q_gd = 13 nC) supports efficient high-frequency switching in hard-switched topologies while maintaining low Miller-induced turn-off delay.

The device integrates a robust body diode with 190–285 ns reverse recovery time and 990–1485 nC Q_rr, enabling reliable operation in synchronous rectification and freewheeling applications where diode recovery stress is critical. Thermal design is supported by R_θJC = 0.71 °C/W and validated 175 °C continuous operation.

Key Specifications

Pinout & Package

Package: D2PAK (TO-263), surface-mount, isolated drain tab, 3-pin configuration with exposed metal pad for thermal and electrical connection to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage automotive MOSFET applications.

Compared with STL220N3LLH6 and IPB180N15N5, AUIRFS6535 uniquely balances 300 V robustness, 148 mΩ conduction loss, and automotive thermal endurance-making it the only option among the three suitable for 48 V–400 V hybrid vehicle power stages requiring both voltage margin and avalanche ruggedness.

Availability

AUIRFS6535 is available at Aetrix Electronics and suitable for engine control units, 48 V mild hybrid converters, electric power steering inverters, and onboard charger front-ends requiring stable component supply across extended automotive product lifecycles.

Supply support for AUIRFS6535 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 management, automotive electronics, and industrial control ICs, with leadership in silicon-based power devices and wide-bandgap solutions.

The AUIRFS6535 belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability, high-temperature switching in engine, transmission, and ADAS power systems where voltage transients and thermal stress are routine.

FAQ

Is AUIRFS6535 pin-compatible with AUIRFSL6535?

Yes - AUIRFS6535 (D2PAK) and AUIRFSL6535 (TO-262) share identical pinout order (G-D-S) and electrical specifications, but differ in package mechanical form factor and thermal resistance. The D2PAK version offers lower R_θJC (0.71 °C/W vs. TO-262's 0.85 °C/W) and higher power dissipation (210 W vs. 190 W), making it preferred for thermally constrained layouts.

What is the maximum allowable gate resistor for reliable switching?

For stable operation with 10 V gate drive and 11 A drain current, the recommended gate resistor range is 2.2 Ω to 10 Ω. Lower values (≤5 Ω) ensure fast turn-on (t_d(on) ≤15 ns) and reduce Miller-induced oscillation risk; values above 10 Ω increase switching loss and may cause incomplete turn-on under high-temperature conditions due to reduced gate drive strength.

Does AUIRFS6535 support paralleling for higher current capacity?

Yes - the device's positive R_DS(on) temperature coefficient (0.39 V/°C) enables inherently stable current sharing when paralleled. Successful implementation requires matched gate drive paths, symmetrical PCB layout, and thermal coupling via shared heatsink. Derating to 80% of total rated current per device is recommended to maintain <10 °C inter-device junction temperature spread.

Can AUIRFS6535 replace older AUIRF3604 in existing designs?

No - although both are automotive N-channel MOSFETs, AUIRF3604 has 400 V V_DS and 140 mΩ R_DS(on), while AUIRFS6535 offers 300 V V_DS and higher R_DS(on) (148 mΩ). Substitution risks overvoltage failure in 400 V applications and increased conduction loss; redesign validation including SOA, avalanche, and thermal analysis is mandatory before replacement.