Diodes Incorporated STPF1040CTW

Overview

STPF1040CTW from Diodes Incorporated is a super fast glass passivated rectifier diode rated for 400 V repetitive peak reverse voltage and 10 A average forward current at Tc = 90°C, with 35 ns reverse recovery time and 1.50 V forward voltage at 10 A/25°C. It is used in high-frequency AC/DC converters, switch-mode power supplies, and freewheeling applications requiring low conduction loss and fast switching.

For engineers reviewing the STPF1040CTW datasheet, STPF1040CTW pinout, STPF1040CTW application, or STPF1040CTW equivalent, key selection criteria include reverse recovery time (TRR ≤ 35 ns), thermal resistance (RthJC = 5 °C/W), forward voltage at full load, and ITO-220AB(W/B) package compatibility with heatsink mounting.

Technical Context

This device employs a planar epitaxial silicon junction structure with glass passivation for enhanced reliability and moisture resistance. Its super-fast recovery (TRR ≤ 35 ns) enables operation in high-frequency SMPS topologies up to several hundred kHz without excessive switching loss.

The ITO-220AB(W/B) package features isolated collector tab (Pin 2), anode (Pin 1), and cathode (Pin 3), supporting direct heatsink mounting with 0.5 N·m torque. Thermal resistance from junction to case is 5 °C/W under standardized test conditions on a 100.64 mm × 75.2 mm × 26.83 mm aluminum plate.

Key Specifications

Pinout & Package

Package: ITO-220AB(W/B), molded plastic with isolated metal tab (Pin 2), RoHS-compliant lead-free finish, UL 94V-0 flammability rating, and halogen/antimony-free "Green" compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super-fast rectifier applications.

Compared with STTH10R06DJF and ES1J-M3/84A, STPF1040CTW uniquely balances 400 V/10 A rating, 35 ns speed, and isolated-tab ITO-220AB packaging-making it optimal for medium-power industrial SMPS where thermal management and board-level isolation are co-designed constraints.

Availability

STPF1040CTW is available at Aetrix Electronics and suitable for AC/DC front-end rectification, switch-mode power supply output stages, DC motor freewheeling, and inductive load snubbing requiring stable component supply and long-term industrial lifecycle support.

Supply support for STPF1040CTW 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The STP-series super-fast rectifiers are engineered for high-efficiency power conversion in industrial, computing, and consumer power supplies-emphasizing low VF, fast TRR, and robust thermal performance in through-hole packages.

FAQ

What is the maximum case temperature for continuous 10 A operation?

The STPF1040CTW is rated for 10 A average forward current at Tc = 90°C, per its derating curve. Operation above this temperature requires proportional current reduction; at 125°C case temperature, maximum IAV drops to approximately 6.5 A. Thermal design must ensure the tab (Pin 2) remains at or below the specified limit using an appropriately sized heatsink.

Is Pin 2 electrically isolated from the semiconductor die?

Yes. The ITO-220AB(W/B) package designation confirms that Pin 2 (the metal tab) is electrically isolated from both the anode (Pin 1) and cathode (Pin 3). This isolation allows direct mounting to a grounded heatsink without short-circuit risk, verified by Diodes' mechanical drawings and insulation resistance testing per JESD22-A114.

Can STPF1040CTW replace standard FR107-type rectifiers?

No-STPF1040CTW is not a drop-in replacement for FR107. While both are fast rectifiers, FR107 has 1 A IAV and DO-41 package, whereas STPF1040CTW delivers 10× higher current in ITO-220AB. Substitution requires PCB layout change, thermal redesign, and verification of surge current handling (80 A vs. ~30 A for FR107).

Does the "Green" designation affect electrical performance?

No. The "Green" status refers exclusively to halogen- and antimony-free molding compound (≤900 ppm Br/Cl, ≤1000 ppm Sb), compliant with IPC-1752A and EU directives. Electrical parameters-including VF, TRR, and IR-are identical to non-Green variants; only material composition differs, with no impact on forward conduction, switching behavior, or thermal characteristics.