Diodes Incorporated MBRB1530CT-T

Overview

MBRB1530CT-T from Diodes Incorporated is a 15A dual common-cathode surface-mount Schottky barrier rectifier in D²PAK package, rated for 30V peak repetitive reverse voltage, 0.7V forward voltage at 7.5A per element, and 150A non-repetitive surge current - used in low-voltage DC-DC converter output stages and polarity protection circuits.

For engineers reviewing the MBRB1530CT-T datasheet, MBRB1530CT-T pinout, MBRB1530CT-T application, or MBRB1530CT-T equivalent, key selection criteria include its 3.0°C/W junction-to-terminal thermal resistance, 30ns reverse recovery time, 250pF total capacitance at 1MHz/4V, guard ring die construction for transient robustness, and RoHS-compliant tin-plated terminals.

Technical Context

This dual Schottky rectifier integrates two independent anode elements sharing a common cathode terminal, enabling synchronous or interleaved conduction paths in high-efficiency 12V–24V power supplies. Its low V_F minimizes conduction loss while the 150A I_FSM rating supports brief load transients without derating.

The D²PAK package provides enhanced thermal dissipation over TO-263 variants, with validated 1.7g mass and UL 94V-0 mold compound. Pin 1 and Pin 3 are anodes; Pin 2 & 4 are internally bonded to the common cathode and electrically tied together for PCB layout simplification.

Key Specifications

Pinout & Package

Package: D²PAK (TO-263AB), molded plastic case with UL 94V-0 flammability rating, 1.7g mass, moisture sensitivity level 1, tin-plated terminals solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-15CTQ030PbF and MBR1530CT, MBRB1530CT-T delivers superior thermal performance in space-constrained SMT layouts, maintains RoHS compliance without exemptions, and offers validated 150A surge margin - making it optimal for modern 12–48V industrial and telecom power modules.

Availability

MBRB1530CT-T is available at Aetrix Electronics and suitable for DC-DC converter output rectification, polarity protection circuits, free-wheeling diode applications, and low-voltage inverter output stages requiring stable component supply across production lifecycles.

Supply support for MBRB1530CT-T 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

The MBRB15xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in industrial, computing, and telecom infrastructure equipment.

FAQ

What is the maximum junction temperature for continuous operation?

The MBRB1530CT-T supports continuous operation up to +150°C junction temperature when reverse voltage is held ≤80% of V_RRM (i.e., ≤24V). At higher reverse bias (≤50% V_RRM), the limit extends to +180°C. Thermal design must ensure junction temperature stays within this range using the 3.0°C/W R_θJT value and measured case temperature.

Can Pin 2 and Pin 4 be used independently?

No - Pins 2 and 4 are internally bonded to form a single common cathode node. They must be connected to the same net on the PCB. Using them separately would violate internal construction and cause unpredictable current sharing or thermal imbalance between the two anode elements.

Is the MBRB1530CT-T suitable for automotive under-hood applications?

It meets AEC-Q101 stress test requirements for temperature cycling, humidity, and mechanical shock when qualified per Diodes' automotive-grade variant (MBRB1530CTQ-T). The standard MBRB1530CT-T is rated for -65°C to +175°C storage and -65°C to +150°C operating temperature, but lacks PPAP documentation and automotive-specific qualification testing.

How does the guard ring construction improve reliability?

The guard ring die structure surrounds the active junction with a doped region that redistributes electric field gradients during voltage transients, suppressing avalanche breakdown at edges. This increases ESD robustness (IEC 61000-4-2 Level 4) and improves long-term stability under repetitive surge conditions like motor commutation noise or inductive load switching.