Diodes Incorporated MBRM5100-13-F

Overview

MBRM5100-13-F from Diodes Incorporated is a 5A, 100V high-voltage Schottky barrier rectifier in POWERMITE3 package, designed for low-loss freewheeling, polarity protection, and high-frequency inverter outputs. It features 0.64V typical forward voltage at 5A/125°C, 100A non-repetitive surge capability, and UL 94V-0 flammability-rated molded plastic case.

For engineers reviewing the MBRM5100-13-F datasheet, MBRM5100-13-F pinout, MBRM5100-13-F application, or MBRM5100-13-F equivalent, key selection factors include thermal resistance (R_JS = 2.7°C/W), guard-ring die construction for transient robustness, and mandatory PCB-level connection of Pins 1 & 2 per DS30141 Rev. 2.

Technical Context

This Schottky rectifier uses a guard-ring die structure to enhance transient voltage immunity and suppress leakage under high reverse bias. Its low forward voltage drop (0.64–0.73V at 5A/125°C) minimizes conduction loss in DC-DC output stages and flyback snubbers.

Thermal design relies on direct heat sinking via the bottom-side cathode pad (Pin 3), with R_JC = 1.2°C/W and R_JS = 2.7°C/W enabling high-power operation at T_j up to +125°C. Pins 1 & 2 must be shorted externally on PCB to ensure correct anode routing and current sharing.

Key Specifications

Pinout & Package

Package: POWERMITE3 - surface-mount molded plastic housing with bottom-side thermal pad (Pin 3), 3-pin configuration, UL 94V-0 rated, 0.072 g mass. Dimensions per DS30141: A=4.03–4.09 mm, B=6.40–6.61 mm, C=0.889 mm (nom), L=0.71–0.77 mm, P=1.73–1.83 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS510-E3/57T and SB5100, the MBRM5100-13-F delivers superior surge resilience via guard-ring die and significantly lower thermal impedance-enabling higher sustained current density in thermally constrained 5A power rails.

Availability

MBRM5100-13-F is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive auxiliary power supply, and high-frequency inverter freewheeling requiring stable component supply and long-term production continuity.

Supply support for MBRM5100-13-F 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, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and automotive markets.

The MBRM5100 belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for low-loss, high-reliability operation in compact power conversion systems where thermal performance and transient immunity are critical.

FAQ

Why must Pins 1 and 2 be connected on the PCB?

Pins 1 and 2 are both anode terminals internally tied to the same semiconductor die region. External PCB connection ensures balanced current sharing and meets the 5A rating and thermal specifications defined in DS30141. Omitting this link causes uneven current distribution, localized heating, and premature failure under full load.

What is the role of the bottom-side thermal pad (Pin 3)?

Pin 3 serves as both the cathode electrical terminal and the primary thermal conduction path. It must be soldered to a dedicated PCB copper pour or heatsink to achieve the specified R_JS = 2.7°C/W. Without proper thermal anchoring, junction temperature rises rapidly, derating output current by over 40% at ambient temperatures above 50°C.

How does the guard-ring die construction improve reliability?

The guard ring surrounds the active junction to control electric field distribution during reverse bias, suppressing edge breakdown and reducing IR drift under thermal cycling. This extends operational life in applications exposed to repetitive transients such as motor drives and automotive load dump events, where standard Schottky diodes may experience parametric shift or catastrophic failure.

Can MBRM5100-13-F replace a standard silicon rectifier in a 12V power supply?

Yes - it replaces 1N5408 or similar 3A–5A silicon diodes with measurable benefits: 0.64V forward drop vs. ~0.95V at 5A reduces power loss by ~1.5W per device, lowering thermal stress and improving efficiency. However, its 100V V_RRM limits use to ≤12V systems with low-voltage ripple; it is not suitable for 24V or 48V bus applications without derating.