Fairchild Semiconductor MBR3050PT

Overview

MBR3050PT from Diodes Incorporated is a 30A dual common-cathode Schottky barrier rectifier in TO-3P package, rated for 50V peak reverse voltage, with 0.75V forward voltage drop at 30A/25°C and 200A non-repetitive surge capability - used in high-frequency DC-DC converters, solar microinverters, and industrial power supplies.

For engineers reviewing the MBR3050PT datasheet, MBR3050PT pinout, MBR3050PT application, or MBR3050PT equivalent, key selection criteria include its low V_F at high current, thermal resistance of 1.4°C/W, guard ring die construction for transient robustness, and RoHS-compliant tin-plated leads suitable for lead-free reflow.

Technical Context

This dual-element Schottky rectifier integrates two anodes sharing one cathode terminal, enabling synchronous rectification or dual-output DC supply paths. Its guard ring die structure enhances ruggedness against voltage transients, while the molded plastic TO-3P case provides mechanical stability and UL 94V-0 flammability rating.

Designed for operation up to +150°C junction temperature, it delivers stable performance under high di/dt conditions (dV/dt = 10,000 V/µs) and exhibits low junction-to-case thermal resistance (1.4°C/W) when mounted on heatsinks - critical for continuous 30A conduction in compact power stages.

Key Specifications

Pinout & Package

TO-3P package: insulated plastic case with three external terminals - two anodes (A1, A2) and one common cathode (K). Mounting hole centered between anode leads accommodates screw-down heatsink attachment. Case meets UL 94V-0 flammability standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH05 and MBR3050CT, MBR3050PT uniquely combines dual-anode integration, 200 A surge margin, and 1.4°C/W thermal resistance in TO-3P - making it optimal for space-constrained, high-reliability 30A power conversion where single-device simplicity and thermal headroom are critical.

Availability

MBR3050PT is available at Aetrix Electronics and suitable for solar microinverters, industrial DC-DC converters, and telecom power shelves requiring stable component supply despite its discontinued status - supported via legacy inventory and cross-qualified alternatives.

Supply support for MBR3050PT 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 and manufacturing operations across Asia and the Americas.

The MBR3050PT belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical AC/DC and DC/DC power conversion in industrial, telecom, and renewable energy systems.

FAQ

Is MBR3050PT still in active production?

No - Diodes Incorporated officially discontinued MBR3050PT as of July 2015 (DS23017 Rev. 9-4). Aetrix Electronics maintains limited legacy stock and supports design continuity through verified cross-references and application-aligned alternatives with documented parametric equivalence.

What is the correct mounting torque for the TO-3P screw hole?

The TO-3P package uses a centered 3.25 mm diameter mounting hole (K dimension: 2.9–3.65 mm Ø). Diodes recommends 0.5–0.7 N·m torque with a #6-32 UNC screw and thermally conductive grease - exceeding 0.8 N·m risks case cracking and degrades R_θJC performance.

Can MBR3050PT replace MBR3045PT in existing designs?

Yes - MBR3050PT shares identical TO-3P package, pinout, thermal profile, and surge rating with MBR3045PT, and offers 5 V higher V_RRM (50 V vs. 45 V). No layout or thermal redesign is needed; the increased blocking margin improves reliability in noisy 48 V bus environments.

Does MBR3050PT require derating for capacitive loads?

Yes - per Diodes' datasheet, average forward current must be derated by 20% when used with capacitive-input filters. At T_C = 125°C, the usable I_O drops from 30 A to 24 A to prevent thermal runaway caused by high inrush current into large bulk capacitors.