Diodes Incorporated MBR15100CT-G1

Overview

MBR15100CT-G1 from Diodes Incorporated is a high-voltage dual common-cathode Schottky rectifier in TO-220-3 (2) package, rated for 100 V reverse voltage, 7.5 A per diode leg (15 A total), and 0.85 V max forward voltage at +25°C. It delivers low switching losses and low noise in high-frequency switch-mode power supplies.

For engineers reviewing the MBR15100CT-G1 datasheet, MBR15100CT-G1 pinout, MBR15100CT-G1 application, or MBR15100CT-G1 equivalent, key selection criteria include its 150°C junction temperature rating, 150 A non-repetitive surge capability, guard-ring stress protection, RoHS-compliant green packaging, and thermal resistance of 2.5°C/W (junction-to-case).

Technical Context

This dual Schottky rectifier integrates two independent anode terminals (A1, A2) sharing a common cathode (K), enabling synchronous or interleaved rectification in center-tapped or dual-output topologies. Its low VF and fast recovery eliminate minority-carrier storage delay, making it suitable for >100 kHz DC-DC converters.

The device uses epitaxial silicon with guard-ring passivation to suppress edge breakdown under high dv/dt (10,000 V/µs) and elevated temperature (125°C IR = 6.0 mA). Thermal design relies on direct case-to-heatsink conduction via the metal tab (TO-220-3), with θJC = 2.5°C/W.

Key Specifications

Pinout & Package

Package: TO-220-3 (2), molded plastic with matte tin–annealed copper leadframe, UL 94V-0 rated, 1.95 g weight. Metal tab is electrically connected to cathode (K) and serves as thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS15H100CG and VBSE15100-M3/4W, MBR15100CT-G1 offers the lowest thermal resistance (2.5°C/W) and guaranteed green compliance, making it optimal for thermally dense, environmentally regulated industrial power designs.

Availability

MBR15100CT-G1 is available at Aetrix Electronics and suitable for server ATX power supplies, LCD TV backlight inverters, industrial PLC power modules, and USB-C PD adapter secondary-side rectification requiring stable component supply and long-term lifecycle support.

Supply support for MBR15100CT-G1 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 MBR15100CT-G1 belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in industrial, computing, and consumer power supplies.

FAQ

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

The MBR15100CT-G1 has a maximum junction temperature of +150°C. This allows operation at higher ambient temperatures without derating, provided the thermal path from junction to heatsink maintains RθJC ≤ 2.5°C/W. For continuous 15 A operation, a minimum 25 cm² aluminum heatsink with thermal interface material is recommended to keep TJ below 140°C.

Is the metal tab electrically isolated or connected to a specific terminal?

The metal tab is electrically connected to Pin 2 (common cathode K) and is not isolated. It must be mounted to a grounded or common-potential heatsink using insulating hardware only if circuit isolation is required. Direct mounting without insulation is standard practice for cathode-referenced topologies.

How does the guard-ring structure improve reliability in real-world applications?

The integrated guard-ring prevents edge avalanche breakdown during voltage transients and mechanical stress from PCB flexure or thermal cycling. In field-deployed PLC power modules, this reduces infant mortality by >40% compared to non-guarded Schottky rectifiers subjected to repeated 150 V surge events.

Can MBR15100CT-G1 replace MBR15100CT-E1 in existing designs?

Yes - MBR15100CT-G1 is functionally identical to MBR15100CT-E1 except for the "green" packaging (halogen/antimony-free compound). Both share identical electrical specs, pinout, thermal performance, and RoHS compliance. No layout or thermal redesign is needed; only material declaration documentation differs.