Diodes Incorporated SBR3040CTFP

Overview

SBR3040CTFP from Diodes Incorporated is a 30A dual common-cathode Super Barrier Rectifier rated for 40V peak reverse voltage, with typical forward voltage of 0.50V at 15A and 25°C, 0.48V at 15A and 125°C, and thermal resistance of 4°C/W (junction-to-case, per leg). It is used in high-efficiency DC-DC converters and secondary-side rectification in AC-DC power supplies.

For engineers reviewing the SBR3040CTFP datasheet, SBR3040CTFP pinout, SBR3040CTFP application, or SBR3040CTFP equivalent, key selection criteria include low VF stability over temperature, soft-switching behavior for EMI reduction, ITO-220AB isolation rating (2000 VAC), and RoHS-compliant matte tin terminations suitable for lead-free reflow.

Technical Context

This device integrates two independent super barrier rectifier dies in a single ITO-220AB package with electrically isolated tab, enabling dual-output or parallel-leg configurations while maintaining creepage/clearance compliance. Its patented super barrier structure replaces traditional PN junctions with metal-semiconductor interfaces to suppress minority-carrier injection.

The rectifier delivers soft, fast recovery (no hard reverse recovery spike) with <2 A peak repetitive reverse surge current and <100 mA leakage at 40 V and 125°C, supporting operation up to 150°C junction temperature under derated conditions.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with electrically isolated metal tab (rated 2000 VAC), molded plastic body (UL 94V-0), and matte tin-plated copper leadframe.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, low-VF rectifier applications.

Compared with SBRT3040CTFP, SBR3040CTFP offers broader VF tolerance but identical thermal and isolation specs; versus MBR3040CT, it provides 0.12 V lower VF and 2000 VAC isolation-critical for safety-certified industrial designs.

Availability

SBR3040CTFP is available at Aetrix Electronics and suitable for server VRM output stages, industrial AC-DC adapters, and telecom DC-DC bricks requiring stable component supply, high-temperature reliability, and reinforced isolation.

Supply support for SBR3040CTFP 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 SBR® Super Barrier Rectifier product line was developed to replace conventional Schottky and fast recovery diodes in high-efficiency, high-temperature power conversion applications where low VF and soft switching are essential.

FAQ

What is the maximum continuous junction temperature for SBR3040CTFP?

The absolute maximum junction temperature is +150°C. Operation at this limit requires strict thermal design: case temperature must be held ≤75°C at 15 A per leg, per the derating curve. Exceeding TJ(max) risks irreversible degradation of the super barrier interface and increased leakage.

Can SBR3040CTFP be used in place of a standard TO-220AB Schottky diode?

Yes, but only with mechanical and electrical verification: the ITO-220AB package has an isolated tab requiring different mounting hardware, and its 0.50 V VF is lower than most Schottkys (e.g., MBR3040CT's 0.62 V), which may alter loop compensation and thermal margin in existing designs.

Is the cathode pin internally connected between both anodes?

Yes-Pin 2 is a monolithic common cathode connecting both internal rectifier dies. This configuration enables dual-output generation or current doubling; it is not configurable as independent devices, and no internal isolation exists between the two anode paths.

Does SBR3040CTFP require a heatsink in all applications?

A heatsink is required whenever power dissipation exceeds ~3 W per leg (e.g., >6 A at 0.5 V VF). At 15 A per leg, junction-to-ambient thermal resistance would exceed safe limits without heatsinking; the 4°C/W RθJC rating assumes direct attachment to a ≥100 cm² aluminum heatsink with thermal interface material.