Diodes Incorporated SBR30A150CT

Overview

SBR30A150CT from Diodes Incorporated is a 30A dual common-cathode super barrier rectifier in TO-220AB package, rated for 150V peak reverse voltage, with typical forward voltage of 0.74V at 15A and 125°C, and thermal resistance of 2°C/W junction-to-case. It serves as a high-efficiency output rectifier in AC/DC power supplies and DC/DC converters for industrial and telecom power systems.

For engineers reviewing the SBR30A150CT datasheet, SBR30A150CT pinout, SBR30A150CT application, or SBR30A150CT equivalent, key selection criteria include forward voltage at elevated temperature, surge current capability (250A IFSM), leakage current at 125°C (≤10mA), and thermal performance in forced-air or heatsink-mounted configurations.

Technical Context

This dual-anode, single-cathode rectifier integrates two independent 15A legs sharing one cathode terminal, enabling synchronous half-wave or center-tapped full-wave rectification. Its patented super barrier structure replaces conventional PN junctions with low-barrier metal-semiconductor interfaces, reducing forward conduction loss while maintaining soft recovery behavior.

Designed for operation up to +175°C junction temperature, it delivers stable leakage current (<10mA at 150V/125°C) and minimal VF drift across temperature-critical for high-reliability offline SMPS and redundant power modules where thermal management is constrained.

Key Specifications

Pinout & Package

Package: TO-220AB - Insulated plastic case with copper leadframe, UL 94V-0 rated, matte tin-plated terminals, 1.85g weight. Mounting tab is electrically connected to Cathode (Pin 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH01-M3 and MBR30150CT, the SBR30A150CT uniquely balances 150V rating, low VF stability at 125°C, and TO-220AB compatibility-making it optimal for thermally dense, high-efficiency 115/230VAC-input power supplies where board space and thermal interface simplicity are critical.

Availability

SBR30A150CT is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, telecom rectifier modules, and redundant power systems requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for SBR30A150CT 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 North America.

The SBR® Super Barrier Rectifier product line was developed to replace conventional Schottky and fast recovery diodes in high-efficiency, high-temperature power conversion-targeting AC/DC adapters, server PSUs, and industrial power modules demanding low VF, soft recovery, and robust thermal performance.

FAQ

Is the SBR30A150CT pin-compatible with standard TO-220AB dual-diode packages?

Yes-SBR30A150CT uses industry-standard TO-220AB mechanical dimensions and 3-pin layout (Anode1–Anode2–Common Cathode), matching footprint and mounting hole positions of MBR30xxCT, SR30xxCT, and similar dual-common-cathode rectifiers. The cathode tab is internally connected to Pin 3 and the metal mounting surface.

What is the maximum recommended heatsink temperature for continuous 30A operation?

At 30A total (15A per leg), with RθJC = 2°C/W and max TJ = 175°C, the case temperature must not exceed 145°C. Assuming 20°C/W heatsink-to-ambient resistance and 1.5W conduction loss per leg, maximum heatsink temperature is 95°C in still air-forced airflow or low-thermal-resistance heatsinks are required for sustained full-load operation.

Does the SBR30A150CT require snubber circuits in 100kHz+ LLC resonant converters?

No snubber is required in typical LLC designs due to its soft, low-noise reverse recovery behavior-confirmed by low-voltage ringing in application circuits at 200kHz switching. However, a small RC snubber (10Ω + 100pF) is recommended across each anode–cathode if layout parasitics exceed 20nH or if EMI compliance margins are tight.

Can SBR30A150CT be used in place of a single 30A Schottky in a center-tapped transformer design?

Yes-it is functionally equivalent to two 15A Schottkys sharing a cathode, making it ideal for center-tapped rectification. Unlike a single 30A Schottky, it avoids current imbalance issues and provides inherent leg-level thermal monitoring via separate anode leads, improving reliability in high-power applications.