Diodes Incorporated SBR30A50CTFP

Overview

SBR30A50CT from Diodes Incorporated is a 30A dual common-cathode Super Barrier Rectifier in TO-220AB package, rated for 50V peak reverse voltage, with typical forward voltage of 0.50V at 15A and 125°C, and 260A non-repetitive surge capability-designed for high-efficiency DC/DC conversion in automotive power supplies and industrial SMPS.

For engineers reviewing the SBR30A50CT datasheet, SBR30A50CT pinout, SBR30A50CT application, or SBR30A50CT equivalent, key selection criteria include its low VF stability over temperature, soft-switching behavior to reduce EMI, and AEC-Q101 readiness for under-hood automotive use.

Technical Context

This dual-element rectifier integrates two independent SBR diodes sharing a common cathode terminal, enabling synchronous half-wave or center-tap full-wave configurations. Its patented super barrier structure replaces traditional PN junctions with metal-semiconductor interfaces to suppress minority-carrier injection and minimize reverse recovery charge (Qrr).

Thermal performance is defined by RθJC = 2°C/W per leg and RθJA = 9.5°C/W (with heatsink), supporting continuous 15A per leg at 125°C ambient. The device operates across –65°C to +150°C junction temperature range and withstands 2000VAC isolation between terminals and heatsink.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal molded plastic case with isolated tab (heatsink-compatible), matte tin-plated copper leads, UL 94V-0 rated, weight ≈1.85 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH05 and MBR3050CT, SBR30A50CT delivers superior thermal VF stability, lower EMI due to soft switching, and automotive-ready qualification-making it optimal for high-reliability, thermally constrained, and noise-sensitive power systems.

Availability

SBR30A50CT is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS outputs, and server ORing circuits requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for SBR30A50CT 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.

SBR30A50CT belongs to Diodes' SBR® Super Barrier Rectifier product line, engineered specifically to replace Schottky diodes in high-current, high-temperature power conversion where low VF, soft switching, and reliability are critical.

FAQ

Is SBR30A50CT pin-compatible with standard TO-220AB dual diodes like MBR3050CT?

Yes-SBR30A50CT uses the industry-standard TO-220AB outline with identical mechanical dimensions and 3-pin common-cathode configuration (Anode1–Cathode–Anode2). Mounting hole spacing, tab isolation, and lead pitch match MBR3050CT and VS-30CPH05, enabling direct mechanical replacement without PCB redesign.

Does SBR30A50CT require a heatsink for 15A continuous operation?

Yes-continuous 15A per leg requires a heatsink. With RθJC = 2°C/W and maximum TJ = 150°C, a 25°C ambient environment allows only 62.5W max power dissipation before heatsinking. At 0.50V VF, each leg dissipates 7.5W; a heatsink maintaining RθJA ≤ 9.5°C/W is mandatory to stay within thermal limits.

What is the isolation voltage rating between the TO-220AB tab and internal terminals?

The isolation voltage is 2000VAC for 3 seconds between the metal tab (heatsink interface) and all internal terminals, verified per ITO-220AB construction. This rating supports reinforced insulation in medical and industrial power supplies meeting IEC 60601 or IEC 62368-1 requirements when mounted with appropriate insulating hardware.

Can SBR30A50CT be used in synchronous rectification topologies?

No-it is a passive rectifier, not a synchronous MOSFET controller or driver. However, its soft-switching behavior and low Qrr make it an excellent choice as a self-commutated rectifier in quasi-resonant or LLC secondary-side designs where gate drive complexity must be avoided while maintaining low EMI and high efficiency.