SMC Diode Solutions MBRB20150CT

Overview

MBRB20150CT from Diodes Incorporated is a dual common-cathode Schottky barrier rectifier in TO263AB (D2PAK) package, rated at 150 V reverse voltage and 10 A average forward current per leg (20 A total), with maximum 0.90 V forward voltage at 10 A and 25°C. It serves as polarity protection, recirculating, and switching diode in DC-DC converters and industrial power supplies.

For engineers reviewing the MBRB20150CT datasheet, MBRB20150CT pinout, MBRB20150CT application, or MBRB20150CT equivalent, key selection criteria include its 170 A non-repetitive surge rating, 5 °C/W junction-to-case thermal resistance, AEC-Q101 qualification, RoHS-compliant matte tin finish, and dual-leg common-cathode configuration for high-efficiency bidirectional rectification.

Technical Context

This device integrates two independent Schottky die in a single D2PAK thermally enhanced package, sharing a common cathode terminal. Its guard ring construction provides transient overvoltage protection, while low VF enables reduced conduction losses in high-frequency switching topologies.

Designed for operation up to +175°C junction temperature, it supports derated current handling under capacitive loads (−20% IO) and exhibits <0.05 mA leakage at 150 V and 25°C - critical for low-power standby and energy-sensitive applications.

Key Specifications

Pinout & Package

Package: TO263AB (D2PAK), surface-mount, thermally enhanced plastic case with exposed copper drain pad for heatsinking. Weight: ~1.6 g. Moisture sensitivity level: J-STD-020 Level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with STPS20H15CG and SS20150CT, the MBRB20150CT uniquely combines AEC-Q101 qualification, 0.05 mA leakage ceiling, and 5 °C/W RθJC in D2PAK - making it the sole option for thermally constrained, safety-critical automotive and industrial power stages requiring long-term reliability.

Availability

MBRB20150CT is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive body control modules, industrial motor drive recirculation, and telecom power shelf backup requiring stable component supply and long-lifecycle support.

Supply support for MBRB20150CT 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 MBRB20150CT belongs to Diodes' high-reliability Schottky rectifier product line, engineered specifically for automotive and industrial power conversion where low VF, high surge tolerance, and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The MBRB20150CT has a maximum junction temperature of +175°C. Its 5 °C/W junction-to-case thermal resistance requires direct thermal coupling of the exposed tab to a heatsink or large copper plane. At 10 A per leg and 0.90 V VF, power dissipation is ~9 W per leg; using RθJC, this yields a 45°C rise above case temperature - meaning ambient must stay ≤130°C for safe operation without additional cooling.

Is the MBRB20150CT suitable for synchronous rectification replacement?

Yes - its 0.90 V forward voltage at 10 A and fast switching characteristics make it ideal for replacing MOSFET-based synchronous rectifiers in medium-power DC-DC converters where gate drive complexity or shoot-through risk is undesirable. However, unlike active FETs, it cannot achieve zero-VF conduction, so efficiency gains are bounded by Schottky physics rather than control timing.

How does the common-cathode configuration impact PCB layout?

The common-cathode topology minimizes loop area between the two anodes and shared cathode, reducing high-frequency EMI radiation. Layout best practices include symmetric trace routing to both anodes, direct connection of the cathode tab to a solid ground plane, and placement near the converter's output capacitor to shorten high-di/dt paths - all supported by the D2PAK's thermal pad and low-inductance terminal geometry.

Does the AEC-Q101 qualification cover both temperature and mechanical stress testing?

Yes - AEC-Q101 certification for the MBRB20150CT includes full stress testing per the standard: temperature cycling (−55°C to +150°C, 1000 cycles), high-temperature reverse bias (1000 hrs at 150°C), mechanical shock (1500g), and board flex (5 mm deflection). These tests validate robustness for under-hood automotive deployment, not just temperature endurance.