onsemi FFPF15U20DNTU

Overview

FFPF15U20DNTU from ON Semiconductor is a 200 V, 15 A ultrafast recovery rectifier diode in TO-220F package with 35 ns reverse recovery time, 1.85 V forward voltage at 15 A, and 150 °C maximum junction temperature - used in high-frequency switch-mode power supplies and PFC stages.

For engineers reviewing the FFPF15U20DNTU datasheet, pinout, applications, or equivalent options, key selection criteria include reverse recovery charge (Q_rr = 45 nC), soft recovery behavior, thermal resistance R_θJC = 1.5 °C/W, and compliance with JEDEC TO-220F mechanical outline.

Technical Context

This ultrafast diode employs platinum-doped silicon to achieve controlled minority carrier lifetime, enabling fast turn-off with low Q_rr and soft recovery characteristics critical for reducing EMI in high-frequency converters. Its design targets operation in continuous conduction mode (CCM) PFC boost stages and secondary-side rectification up to 100 kHz.

The FFPF15U20DNTU integrates a monolithic die mounted in an isolated TO-220F package with electrically insulated tab, supporting direct heatsink mounting without insulating washers while maintaining creepage/clearance per UL/IEC standards.

Key Specifications

Pinout & Package

FFPF15U20DNTU uses a 3-pin TO-220F package with electrically isolated metal tab (pin 2). The plastic body provides creepage ≥ 4.0 mm and clearance ≥ 2.5 mm per IEC 60950-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1602CT and IXYS MUR1520CT, the FFPF15U20DNTU offers integrated electrical isolation in a single-diode configuration, reducing BOM count and assembly steps while maintaining competitive t_rr and Q_rr for high-efficiency 200 V rectification.

Availability

FFPF15U20DNTU is available at Aetrix Electronics and suitable for server power supplies, industrial AC-DC adapters, and telecom rectifier modules requiring stable component supply and long-term manufacturability.

Supply support for FFPF15U20DNTU 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 is a global semiconductor supplier focused on energy-efficient electronics, delivering power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The FFPF15U20DNTU belongs to ON Semiconductor's Ultrafast Recovery Diode family, engineered specifically for high-frequency, high-reliability rectification in next-generation power conversion systems where thermal performance and EMI control are critical.

FAQ

What is the maximum junction temperature rating for the FFPF15U20DNTU?

The FFPF15U20DNTU has a maximum junction temperature (T_J) rating of 150 °C. This specification allows reliable operation in high-ambient environments such as enclosed server PSUs or industrial enclosures. Thermal design must ensure that actual junction temperature under worst-case load and ambient conditions remains below this limit to maintain device longevity and parameter stability. Derating curves in the official ON Semiconductor datasheet define allowable current vs. case temperature.

Does the FFPF15U20DNTU have an electrically isolated tab?

Yes, the FFPF15U20DNTU features an electrically isolated metal tab (Pin 2) rated for 2500 V isolation per UL 60950-1. This eliminates the need for insulating washers or thermal pads when mounting to a heatsink, simplifying assembly and improving thermal contact consistency. The isolation is achieved via molded plastic encapsulation between the die attach and tab surface, verified through hi-pot testing during production.

What is the reverse recovery charge (Q_rr) of the FFPF15U20DNTU and why does it matter?

The FFPF15U20DNTU has a typical reverse recovery charge (Q_rr) of 45 nC at I_F = 15 A, T_J = 25 °C. Q_rr directly contributes to switching losses during turn-off and influences voltage overshoot and EMI generation. In high-frequency PFC circuits, lower Q_rr reduces dissipation in the diode and adjacent switches, enabling higher efficiency and smaller passive components. The FFPF15U20DNTU's Q_rr is tightly controlled via platinum diffusion doping.

Can the FFPF15U20DNTU be used as a direct replacement for standard FR-type diodes in existing designs?

The FFPF15U20DNTU can replace standard fast recovery diodes (e.g., FEP16DT) in many cases, but requires verification of thermal and electrical margins due to its ultrafast recovery behavior. Its lower Q_rr and softer turn-off reduce snubber demands and EMI, but may interact differently with existing gate drive timing or snubber networks. Layout parasitics and operating frequency must be reviewed; the FFPF15U20DNTU is not a drop-in replacement without system-level validation.

What is the forward voltage drop of the FFPF15U20DNTU at rated current?

The FFPF15U20DNTU exhibits a typical forward voltage drop (V_F) of 1.85 V at I_F = 15 A and T_J = 25 °C. At elevated junction temperatures (e.g., 125 °C), V_F decreases slightly to ~1.72 V due to negative temperature coefficient of silicon diodes. This V_F value directly determines conduction loss (P_cond = V_F × I_F) and must be included in thermal modeling alongside R_θJC = 1.5 °C/W to size the heatsink appropriately for continuous 15 A operation.