Diodes Incorporated SBR30A45CTFP

Overview

SBR30A45CTFP from Diodes Incorporated is a 30A dual common-cathode Super Barrier Rectifier in ITO-220AB package, rated for 45V peak reverse voltage, with typical forward voltage of 0.45V at 15A and 125°C, and 250A non-repetitive surge capability-designed for high-efficiency AC/DC secondary-side rectification in server power supplies and telecom rectifiers.

For engineers reviewing the SBR30A45CTFP datasheet, SBR30A45CTFP pinout, SBR30A45CTFP application, or SBR30A45CTFP equivalent, key selection criteria include forward voltage drop at elevated temperature, thermal resistance (RθJC = 4°C/W), isolation voltage (2000 VAC), soft switching behavior, and RoHS-compliant green molding compound compliance.

Technical Context

This device integrates two independent rectifying elements sharing a common cathode terminal, enabling synchronous dual-output or parallel current handling in center-tapped transformer topologies. Its patented Super Barrier structure replaces traditional PN junctions with low-barrier metal-semiconductor interfaces, reducing VF while maintaining low leakage.

It operates across –65°C to +150°C junction temperature range and delivers stable performance under high-temperature bias conditions-verified by IR ≤ 100 mA at VR = 45 V and TJ = 125°C, and VF drift < 0.05 V between 25°C and 125°C at 15 A.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with electrically isolated tab (heatsink interface), UL 94V-0 molded plastic body, matte tin-plated copper leadframe, and 1.65 g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR3045CT, SBR30A45CTFP delivers lower conduction loss at high temperature and certified isolation-justifying its use where efficiency, reliability, and safety compliance are prioritized over lowest unit cost.

Availability

SBR30A45CTFP is available at Aetrix Electronics and suitable for server AC/DC power supplies, telecom rectifier modules, and industrial motor drive PSUs requiring stable component supply, long-term lifecycle assurance, and traceable green-material compliance.

Supply support for SBR30A45CTFP 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, manufacturing, and sales operations across Asia, Europe, and the Americas.

The SBR® Super Barrier Rectifier product line targets high-efficiency secondary-side rectification in switched-mode power supplies-specifically engineered to replace Schottky diodes where lower VF, higher temperature stability, and reduced EMI are critical.

FAQ

What is the maximum case temperature for continuous operation?

The SBR30A45CTFP supports continuous operation up to TC = 100°C at full 15 A per leg, as defined by its derating curve. At TC = 100°C, IO remains rated at 15 A per leg; beyond this, current must be linearly reduced to maintain TJ ≤ 150°C, with RθJC = 4°C/W confirming 20°C junction rise above case at full load.

Is the heatsink tab electrically isolated?

Yes-the ITO-220AB package features a fully insulated metal tab rated for 2000 VAC isolation between all terminals and the heatsink mounting surface. This eliminates the need for insulating washers or pads in grounded heatsink configurations, simplifying mechanical design and improving thermal reliability.

How does SBR technology differ from standard Schottky rectifiers?

SBR uses a proprietary barrier-engineered metal-semiconductor junction that achieves lower forward voltage than conventional Schottky diodes while suppressing reverse leakage at high temperature. Unlike Schottky devices, it avoids the trade-off between VF and IR-delivering 0.45 V VF and ≤100 µA IR simultaneously at 125°C, whereas typical Schottkys exceed 500 µA under same conditions.

Can SBR30A45CTFP replace SBR30A45CT in existing designs?

Yes-SBR30A45CTFP is a direct mechanical and electrical replacement for SBR30A45CT, differing only in package (ITO-220AB vs. TO-220AB). Both share identical electrical specs, pinout, and marking code. The ITO-220AB offers 2000 VAC isolation and slightly lower weight (1.65 g vs. 1.85 g), making it preferable for safety-critical or space-constrained layouts.