Diodes Incorporated SBR40150CT

Overview

SBR40150CT from Diodes Incorporated is a 40A dual common-cathode Super Barrier Rectifier rated for 150V peak reverse voltage, with typical forward voltage of 0.77V at 20A and 125°C, soft fast switching capability, and TO-220AB package optimized for high-efficiency AC/DC front-end rectification in industrial power supplies.

For engineers reviewing the SBR40150CT datasheet, SBR40150CT pinout, SBR40150CT application, or SBR40150CT equivalent, key selection criteria include its low VF stability over temperature, 280A non-repetitive surge rating, isolation capability (ITO variant), and thermal resistance of 2°C/W junction-to-case - critical for high-density, convection-cooled power designs.

Technical Context

This dual-diode rectifier integrates two independent 20A legs in a single TO-220AB thermally enhanced package, sharing a common cathode terminal. Its patented Super Barrier structure delivers lower forward voltage than standard Schottky diodes while maintaining superior high-temperature leakage performance (≤10mA at 150V/125°C).

The device operates across –65°C to +175°C junction temperature range and supports single-phase, half-wave 60Hz rectification with 20% derating for capacitive loads. Thermal resistance (RθJC = 2°C/W) enables direct heatsink mounting without thermal interface material in many medium-power applications.

Key Specifications

Pinout & Package

Package: TO-220AB - Thermally optimized plastic case with isolated tab (electrically connected to cathode), UL 94V-0 rated, matte tin-plated copper leadframe, 1.85g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS40H15CW and VSKY15040, the SBR40150CT provides superior high-temperature leakage control and soft recovery behavior - delivering measurable efficiency and EMI advantages in thermally constrained, high-reliability power systems without sacrificing surge robustness.

Availability

SBR40150CT is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, server rectifier modules, and motor drive input stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for SBR40150CT 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 industrial, computing, and renewable energy applications demanding reliability beyond standard diode limits.

FAQ

Is the SBR40150CT pin-compatible with standard TO-220AB dual diodes?

Yes - it uses industry-standard TO-220AB mechanical dimensions and pinout (Anode1–Cathode–Anode2), with the center tab serving as the common cathode. Mounting hole spacing, lead pitch, and outline match JEDEC TO-220AB specifications, enabling drop-in replacement in existing layouts.

What is the maximum recommended case temperature for continuous operation?

The absolute maximum case temperature is 175°C, but the current derating curve specifies 20A per leg only up to TC = 75°C. For continuous 40A total output, thermal design must maintain TC ≤ 75°C; above that, linear derating applies down to zero current at 175°C.

Does the TO-220AB package provide electrical isolation between the tab and leads?

No - the metal tab is electrically connected to the common cathode (Pin 2). It is not isolated; therefore, insulating hardware (e.g., shoulder washers, mica pads) must be used when mounting to a grounded heatsink to prevent short circuits.

How does the SBR40150CT's soft recovery affect EMI in high-frequency rectifier designs?

Its soft reverse recovery reduces di/dt during turn-off, lowering high-frequency ringing and conducted EMI amplitude by 8–12dB in 50–100kHz PFC stages. This allows smaller Y-capacitors and simplified filter designs compared to fast-recovery or standard Schottky alternatives.