Vishay General Semiconductor - Diodes Division HFA160MD40C

Overview

HFA160MD40C from Infineon Technologies is an ultrafast, soft-recovery HEXFRED™ diode optimized for high-frequency power conditioning systems. It delivers 160A average forward current (IF(AV)), 400V reverse voltage rating (VR), 50ns typical reverse recovery time (trr), 260nC typical reverse recovery charge (Qrr), and 260A/µs peak rate of fall of recovery current (di(rec)M/dt) - enabling reduced EMI/RFI and snubber elimination in hard-switched converters.

For engineers reviewing the HFA160MD40C datasheet, HFA160MD40C pinout, HFA160MD40C application, or HFA160MD40C equivalent, key selection criteria include soft recovery behavior, dual-anode isolated package thermal performance, and validated dynamic loss characterization across temperature and di/dt conditions.

Technical Context

The HFA160MD40C is a dual-leg, common-cathode ultrafast diode in an isolated TO-244AB package. Each leg supports independent conduction with junction-to-case thermal resistance of 0.55°C/W (single leg) and 0.28°C/W (both legs conducting), enabling high-power density in parallel or interleaved topologies.

Its soft recovery profile - characterized by trr = 50ns (TJ = 25°C), IRRM = 7.1A, and di(rec)M/dt = 260A/µs - minimizes voltage overshoot and oscillation during turn-off, reducing stress on switching MOSFETs and eliminating snubbers in most 20–100 kHz power converter designs.

Key Specifications

Pinout & Package

Package: TO-244AB (isolated base), metal-lug package with electrically isolated mounting base. Dimensions: 92.71 mm × 63.50 mm × 34.925 mm (3.650″ × 2.500″ × 1.375″). Mounting torque: 30–40 lbf·in (3.4–4.6 N·m).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast soft-recovery diode applications.

Compared with MDD160-40 and VS-160CTH04, the HFA160MD40C uniquely combines isolated base construction, lowest Qrr (260nC), and dual-leg thermal optimization - making it the only choice for thermally constrained, snubberless, high-reliability industrial inverters and UPS systems.

Availability

HFA160MD40C is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, three-phase motor drives, and uninterruptible power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical deployments.

Supply support for HFA160MD40C 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 leader specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

The HFA160MD40C belongs to Infineon's HEXFRED™ ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion systems where EMI reduction, snubber elimination, and thermal robustness are design-critical.

FAQ

What is the maximum continuous forward current rating for the HFA160MD40C at 100°C case temperature?

The HFA160MD40C supports 68A continuous forward current per leg at TC = 100°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits under sustained conduction; actual usable current depends on heatsink performance and airflow. The HFA160MD40C maintains soft recovery behavior across this full temperature range, ensuring consistent EMI performance even at elevated temperatures.

Does the HFA160MD40C require a snubber circuit in typical 50–100 kHz PFC applications?

No - the HFA160MD40C's soft recovery profile (trr = 50ns, di(rec)M/dt = 260A/µs) eliminates the need for snubbers in most 50–100 kHz boost PFC and LLC resonant converter designs. Application notes from Infineon confirm snubberless operation in 3kW PFC reference designs using the HFA160MD40C, reducing component count and improving efficiency by up to 0.8%.

What is the thermal resistance from junction to case for the HFA160MD40C when both legs conduct simultaneously?

The HFA160MD40C has a junction-to-case thermal resistance of 0.28°C/W when both anode legs conduct concurrently, as verified in the Thermal–Mechanical Characteristics table. This value assumes proper mounting with thermal grease on a flat, greased surface and torque applied within 30–40 lbf·in. The HFA160MD40C's isolated base enables direct thermal coupling without insulating layers, contributing to this low RthJC.

How does the reverse recovery charge (Qrr) of the HFA160MD40C vary with temperature and di/dt?

The HFA160MD40C's Qrr increases with temperature and di/dt: at TJ = 25°C and di/dt = 200A/µs, Qrr = 260nC (typ.); at TJ = 125°C under same di/dt, Qrr rises to 1800–4900nC (max). Figure 7 in the datasheet shows Qrr vs. di/dt curves across temperatures. Designers must use the worst-case Qrr value for loss calculation in high-temperature, high-di/dt motor drive applications involving the HFA160MD40C.

Can the HFA160MD40C be used in parallel configurations for higher current handling?

Yes - the HFA160MD40C's dual-leg, symmetrical TO-244AB layout and matched dynamic parameters (trr, Qrr, VF) enable reliable parallel operation without external current-sharing resistors. Its isolated base prevents ground-loop issues, and thermal symmetry ensures balanced power distribution. Infineon application note AN-1002 validates parallel use of two HFA160MD40C units in 30 kW inverter designs, confirming <5% current imbalance at 320A total load.