Diodes Incorporated SBR30A40CTFP-JT

Overview

SBR30A40CTFP-JT from Diodes Incorporated is a 40V, 30A dual common-cathode super barrier rectifier in ITO-220AB package, designed for high-efficiency DC/DC conversion and OR-ing applications in telecom power supplies and industrial SMPS. It delivers VF ≤ 0.45 V at 15 A and 125°C, supports 250 A non-repetitive surge current, and features soft fast switching with <100 µA leakage at 40 V and 125°C.

For engineers reviewing the SBR30A40CTFP-JT datasheet, SBR30A40CTFP-JT pinout, SBR30A40CTFP-JT application, or SBR30A40CTFP-JT equivalent, key selection criteria include forward voltage at elevated temperature, thermal resistance (RθJC = 4°C/W), isolation voltage (2000 VAC), and RoHS-compliant matte tin terminals suitable for high-reliability soldering per MIL-STD-202.

Technical Context

This dual-element rectifier integrates two independent super barrier diodes sharing a common cathode terminal, enabling synchronous OR-ing or parallel output rectification. Its patented super barrier structure replaces traditional PN junctions with low-barrier metal-semiconductor interfaces, reducing forward conduction loss while maintaining low reverse leakage.

The ITO-220AB package provides electrical isolation between terminals and heatsink (2000 VAC, 3 sec), making it suitable for grounded-heatsink topologies. Thermal performance is optimized for TC = 110°C operation, with derating to zero current at 150°C case temperature per element.

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, weight ≈ 1.65 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current super barrier rectifier applications.

Compared with VS-30CPH04-M3, SBR30A40CTFP-JT trades 1.5°C/W higher thermal resistance for integrated 2000 VAC isolation and lower VF at 125°C; versus MBR3045CT, it delivers 130 mV lower VF and 5× lower high-temp leakage - critical for efficiency and reliability in thermally demanding systems.

Availability

SBR30A40CTFP-JT is available at Aetrix Electronics and suitable for telecom DC/DC converters, industrial redundant power supplies, and server VRM output stages requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for SBR30A40CTFP-JT 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, specializing in high-efficiency power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The SBR® Super Barrier Rectifier product line targets high-current, high-temperature rectification where Schottky limitations (leakage, thermal instability) and standard PN rectifier losses are unacceptable - especially in compact, air-cooled power systems.

FAQ

What is the difference between SBR30A40CTFP-JT and SBR30A40CTFP?

SBR30A40CTFP-JT is an alternate packaging variant of SBR30A40CTFP, both using the ITO-220AB package. The "-JT" suffix denotes a specific tape-and-reel or tube packaging configuration per Diodes Incorporated's internal ordering matrix, with identical electrical, thermal, and mechanical specifications. No performance or reliability differences exist between the two part numbers.

Can SBR30A40CTFP-JT be used in place of a standard Schottky rectifier like MBR3045CT?

Yes, but only if the application requires lower forward voltage at high temperature and reduced reverse leakage. SBR30A40CTFP-JT offers VF = 0.45 V at 125°C versus MBR3045CT's 0.57 V at 25°C and >0.7 V at 125°C, plus 5× lower IR at 125°C. However, its 40 V VRRM is 5 V lower than MBR3045CT's 45 V rating, so voltage margin must be verified.

Is the heatsink tab of SBR30A40CTFP-JT electrically isolated?

Yes. The ITO-220AB package provides 2000 VAC isolation (3 sec) between all terminals and the heatsink-mounting tab. This allows direct mechanical attachment to a grounded heatsink without insulating hardware, simplifying thermal design and reducing parasitic inductance in high-di/dt applications.

What is the maximum recommended case temperature for continuous operation?

The datasheet specifies IO = 30 A at TC = 110°C per element. Derating begins above this point, reaching zero current at TC = 150°C (see Figure 1). For reliable 30 A continuous operation, maintain case temperature ≤ 110°C using appropriate heatsinking; transient surges up to 250 A are allowed for 8.3 ms even at elevated temperatures.