Taiwan Semiconductor Corporation MBR1545CT-Y

Overview

MBR1545CT-Y from Taiwan Semiconductor is a 15A, 45V dual-die Schottky barrier rectifier in TO-220AB package, featuring low forward voltage (0.84 V at 15 A, 25°C), 150 A surge capability, and junction-to-case thermal resistance of 1.5°C/W. It serves as a high-efficiency output rectifier in DC–DC converters and switching power supplies where low conduction loss and fast recovery are critical.

For engineers reviewing the MBR1545CT-Y datasheet, MBR1545CT-Y pinout, MBR1545CT-Y application, or MBR1545CT-Y equivalent, key selection criteria include its 45 V repetitive peak reverse voltage, 15 A average forward current rating, 10 mA reverse leakage at 125°C, TO-220AB mechanical compatibility, and dual-common-cathode configuration for center-tapped transformer designs.

Technical Context

This dual-die Schottky rectifier integrates two independent 15 A/45 V diodes in a single TO-220AB package with common cathode connection. Its low VF (0.57 V typ. at 7.5 A, 125°C) and high dv/dt rating (10,000 V/μs) support high-frequency operation in synchronous rectification and flyback topologies.

The device operates across -55°C to +150°C junction temperature range, with R_θJC = 1.5°C/W enabling effective heat transfer to heatsinks. Guard ring structure provides overvoltage protection, while matte tin-plated leads meet J-STD-002 solderability standards.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal plastic case with isolated mounting tab, UL 94V-0 rated molding compound, matte tin-plated leads, polarity marked on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-15BQ045PBF and MBR1545CT, the MBR1545CT-Y delivers superior thermal performance (1.5°C/W vs. 2.0°C/W) and guaranteed halogen-free compliance, making it preferred for space-constrained, thermally demanding, and environmentally regulated industrial designs.

Availability

MBR1545CT-Y is available at Aetrix Electronics and suitable for switching mode power supplies, DC–DC converters, and AC–DC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for MBR1545CT-Y 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The MBR15xxCT-Y series targets high-efficiency power conversion systems, emphasizing low VF, robust surge handling, and thermally optimized packaging for next-generation SMPS and adapter designs.

FAQ

What is the pin configuration of the MBR1545CT-Y?

The MBR1545CT-Y uses a TO-220AB package with three terminals: Pin 1 is Anode 1, Pin 2 is the common cathode for both diodes, and Pin 3 is Anode 2. This dual-anode/common-cathode arrangement supports center-tapped transformer rectification. Polarity is marked on the device body, and the mounting tab is electrically isolated from all pins.

Does the MBR1545CT-Y support surface-mount assembly?

No, the MBR1545CT-Y is through-hole mounted in a TO-220AB package and requires hole mounting and soldering. It is not designed for reflow or wave soldering in SMT processes. The leads are matte tin-plated and solderable per J-STD-002, but thermal mass and mechanical retention necessitate through-hole PCB footprints and optional heatsink attachment.

What is the maximum junction temperature for continuous operation of the MBR1545CT-Y?

The MBR1545CT-Y has a maximum junction temperature (T_J) of +150°C, verified across its full operating range. For reliable continuous operation at 15 A, case temperature must be maintained ≤100°C-achievable via proper heatsinking given its R_θJC = 1.5°C/W and R_θJA = 10°C/W ratings.

How does the guard ring feature improve reliability in the MBR1545CT-Y?

The guard ring in the MBR1545CT-Y provides edge termination that suppresses electric field crowding at the diode periphery, delaying avalanche onset and preventing localized thermal runaway during voltage transients. This extends operational life in applications exposed to line surges or inductive switching noise, such as industrial motor drives and telecom rectifiers.

Is the MBR1545CT-Y halogen-free and RoHS compliant?

Yes, the MBR1545CT-Y is certified RoHS compliant and halogen-free per IEC 61249-2-21. This is explicitly stated in the official Taiwan Semiconductor documentation and verified in the product's material declaration-critical for compliance in EU, China, and other regulated markets.