onsemi FFP06U40DNTU

Overview

FFP06U40DNTU from ON Semiconductor (formerly Fairchild) is an ultrafast recovery power rectifier diode in TO-220AB package, rated for 400 V peak repetitive reverse voltage, 6 A average forward current at TC = 100°C, and 50 ns reverse recovery time. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the FFP06U40DNTU datasheet, pinout, applications, or equivalent options, key selection criteria include soft recovery behavior, low forward voltage (1.4 V @ 6 A, 25°C), low Qrr (100 nC), avalanche energy rating (1.0 mJ), and thermal resistance (7.0°C/W).

Technical Context

This device employs a planar epitaxial silicon structure optimized for ultrafast soft recovery-minimizing EMI and voltage overshoot during turn-off. Its 50 ns trr and 4.0 A Irr are measured under standardized conditions (IF = 6 A, di/dt = 200 A/µs), confirming suitability for 100–500 kHz SMPS topologies.

The diode features symmetrical dual-anode configuration (pins 1 and 3 = anode, pin 2 = cathode) in TO-220AB, enabling parallel anode connection for thermal sharing. Junction-to-case thermal resistance of 7.0°C/W supports direct heatsink mounting without isolation hardware.

Key Specifications

Pinout & Package

FFP06U40DNTU is housed in a TO-220AB plastic package with isolated tab (pin 2 = cathode, pins 1 & 3 = anodes). The metal tab is electrically connected to the cathode and thermally coupled to the die for direct heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast power rectifier applications.

Compared with STTH6R04DJF and IXYS MUR640E, FFP06U40DNTU uniquely offers dual-anode TO-220AB packaging for thermal and layout symmetry, while maintaining competitive trr (50 ns) and Qrr (100 nC) for mainstream SMPS and industrial converter designs.

Availability

FFP06U40DNTU is available at Aetrix Electronics and suitable for switching mode power supply output rectification, DC-DC boost freewheeling, and industrial motor drive snubber applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for FFP06U40DNTU 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

ON Semiconductor (acquired Fairchild Semiconductor in 2016) is a global supplier of energy-efficient semiconductor components focused on power management, analog, and discrete devices.

The FFP06U40DNTU belongs to Fairchild's Ultrafast Recovery Power Rectifier family, designed specifically for high-efficiency, high-frequency power conversion systems where soft recovery, low conduction loss, and avalanche ruggedness are essential.

FAQ

What is the maximum junction temperature rating for FFP06U40DNTU?

The FFP06U40DNTU has a specified operating junction temperature range of –65°C to +150°C. This wide range supports deployment in demanding industrial and automotive under-hood environments where ambient temperatures exceed 100°C, provided thermal design maintains TJ ≤ 150°C under worst-case power dissipation.

Is FFP06U40DNTU pin-compatible with standard TO-220 rectifiers?

FFP06U40DNTU uses the TO-220AB package with pins 1 and 3 as anodes and pin 2 as cathode-unlike standard TO-220AC rectifiers that have one anode and one cathode. While footprint-compatible, its dual-anode configuration requires PCB layout verification to avoid shorting; it is not a drop-in replacement for single-anode TO-220 parts.

Does FFP06U40DNTU support avalanche operation in circuit design?

Yes, FFP06U40DNTU is explicitly rated for single-pulse avalanche energy (WAVL = 1.0 mJ) per the datasheet. This allows controlled use in freewheeling or snubber roles where inductive energy must be absorbed, though repetitive avalanche operation is not guaranteed and requires careful thermal and pulse-width analysis.

What is the typical reverse recovery charge (Qrr) of FFP06U40DNTU and why does it matter?

The FFP06U40DNTU specifies a maximum Qrr of 100 nC under IF = 6 A and di/dt = 200 A/µs. Qrr directly determines turn-off losses and EMI generation; lower Qrr reduces snubber losses and eases filtering requirements-critical for achieving >90% efficiency in compact 100–300 kHz SMPS designs using FFP06U40DNTU.

How does the dual-anode configuration of FFP06U40DNTU improve thermal performance?

The dual-anode (pins 1 & 3) configuration of FFP06U40DNTU allows symmetrical current injection into the die from both sides, improving current density uniformity and reducing localized heating. When mounted on a heatsink via the cathode-connected tab, this layout enhances thermal coupling efficiency and lowers effective RθJC compared to single-terminal anode devices under identical mounting conditions.