Diodes Incorporated MBR3030PT

Overview

MBR3030PT from Diodes Incorporated is a 30A, 30V dual common-cathode Schottky barrier rectifier in TO-3P package, featuring 0.72V forward voltage at 30A/25°C, 200A non-repetitive surge capability, and 1.4°C/W junction-to-case thermal resistance. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters and switching power supplies.

For engineers reviewing the MBR3030PT datasheet, MBR3030PT pinout, MBR3030PT application, or MBR3030PT equivalent, key selection criteria include its 30V reverse voltage rating, dual-element configuration, TO-3P thermal performance, and suitability for high-frequency freewheeling and polarity protection circuits requiring low conduction loss.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent anode terminals sharing one cathode, enabling synchronous rectification or dual-output configurations. Its guard ring die construction enhances transient immunity, while the low V_F and high I_FSM support robust operation under repetitive load surges and fast-switching conditions.

Designed for operation up to +150°C junction temperature, it delivers stable forward conduction with minimal thermal runaway risk. The 500pF typical junction capacitance and 10,000V/µs dV/dt rating support use in high-frequency inverters without excessive switching losses or noise coupling.

Key Specifications

Pinout & Package

Package: TO-3P (isolated plastic case, UL 94V-0 rated, 5.6g weight). Mounting via center tab (cathode) with two insulated anode leads. Thermal path optimized through metal tab contact to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH03-M3 and MBR3030CT, the MBR3030PT offers unique dual-anode topology in a moisture-insensitive TO-3P package, enabling space-constrained dual-rail designs while maintaining industry-leading thermal resistance and surge margin.

Availability

MBR3030PT is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, solar microinverters, and automotive battery protection circuits requiring stable component supply despite its discontinued status.

Supply support for MBR3030PT 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 MBR3030PT belongs to Diodes' high-current Schottky rectifier product line, engineered for efficiency-critical power conversion in computing, industrial, and renewable energy systems where low V_F and high surge tolerance are mandatory.

FAQ

Is MBR3030PT still in active production?

No. Diodes Incorporated officially discontinued the MBR3030PT as of July 2015, per DS23017 Rev. 9-4. However, Aetrix Electronics maintains legacy inventory with full traceability and provides lifecycle coordination support for ongoing production programs.

What is the maximum allowable case temperature for continuous operation?

The device supports continuous operation up to T_C = +125°C, as specified in the average forward current derating curve (Fig. 1). At this temperature, the rated I_O remains 30A with proper heatsinking and airflow per the TO-3P mounting guidelines.

Can MBR3030PT replace a single 30A Schottky in a single-anode configuration?

Yes - either anode can be used independently with the cathode tab, effectively functioning as a 30A single-element Schottky. The unused anode lead must be insulated and left unconnected; both anodes share identical electrical characteristics per datasheet Table 1.

Does the TO-3P package require thermal compound when mounted to a heatsink?

Yes. Although the metal tab is electrically the cathode, optimal thermal transfer requires thermally conductive paste or pad between the tab and heatsink surface. Mechanical pressure must be applied uniformly to ensure R_θJC remains at the specified 1.4°C/W.