Diodes Incorporated MURS4100C

Overview

MURS4100C from Diodes Incorporated is an ultrafast, glass-passivated silicon rectifier diode in DO-214AB (SMC) package, rated for 1000 V repetitive peak reverse voltage and 4 A average forward current at TC = 130°C. It delivers soft recovery (75 ns trr), low conduction loss (1.53 V VF at 4 A, 150°C), and AEC-Q101 Rev. D qualification - used as a freewheeling or output rectifier in high-efficiency 600–1000 V switching power supplies.

For engineers reviewing the MURS4100C datasheet, MURS4100C pinout, MURS4100C application, or MURS4100C equivalent, key selection criteria include its 75 ns reverse recovery time, 1.53 V forward voltage at 4 A/150°C, AEC-Q101 qualification, DO-214AB thermal resistance (RthJC = 7°C/W), and suitability for automotive-grade DC-DC converters and industrial inverters requiring robust 1000 V blocking capability.

Technical Context

This hyperfast rectifier employs a lightly doped epitaxial structure with optimized carrier lifetime control to achieve soft reverse recovery-minimizing EMI and voltage overshoot during turn-off. Its 75 ns trr is measured under IF = 0.5 A, Irr = 0.25 A, IR = 1.0 A conditions, supporting high-frequency operation up to 100 kHz in hard-switched topologies.

The device exhibits 744 nC reverse recovery charge (Qrr) and 10 A peak reverse recovery current (IRM) at TJ = 125°C, dI/dt = 200 A/ns, VR = 400 V - critical parameters for snubberless design and synchronous rectifier replacement in flyback and LLC resonant converters.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded "Green" compound (UL 94V-0, halogen/antimony-free), 0.249 g typical weight. Cathode marked with band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH4L06D and IXYS MUR4100CT, MURS4100C uniquely combines 1000 V rating, AEC-Q101 qualification, DO-214AB surface-mount compatibility, and 7°C/W thermal resistance - making it the only option qualified for automotive SMT power conversion above 600 V DC bus.

Availability

MURS4100C is available at Aetrix Electronics and suitable for automotive onboard chargers, industrial DC-DC converters, and solar microinverters requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for MURS4100C 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-reliability power management, signal integrity, and protection solutions.

MURS4100C belongs to Diodes' MURS ultrafast rectifier product line, engineered specifically for AEC-Q101-compliant automotive and industrial power conversion where low trr, soft recovery, and high-temperature stability are mandatory.

FAQ

What is the maximum junction temperature for MURS4100C?

The MURS4100C has a specified operating junction temperature range of –55°C to +175°C. This rating is validated per AEC-Q101 Rev. D stress testing, including 1000 hours of high-temperature operating life at 175°C. The 175°C limit enables use in under-hood automotive environments without derating.

Is MURS4100C suitable for synchronous rectification replacement?

Yes - its 75 ns trr, 744 nC Qrr, and soft recovery profile allow direct substitution for Schottky diodes in 100–200 kHz topologies where >100 V reverse voltage is required. However, it does not integrate gate drive logic; external control remains necessary for true synchronous operation.

Does MURS4100C require a heatsink in standard SMC layout?

At 4 A average current and ambient ≤50°C, the DO-214AB package with 7°C/W RthJC can operate without an external heatsink when mounted on ≥1 sq-in 2-oz copper pour. For continuous 4 A at TC ≥100°C, a 30 mm × 30 mm copper plate is recommended per JESD-51 test condition.

How does the "Green" material composition affect soldering process?

The halogen- and antimony-free molding compound meets IPC-J-STD-020 moisture sensitivity level 1, permitting unlimited floor life and standard lead-free reflow profiles (peak 260°C). No special pre-bake or nitrogen atmosphere is required - compatible with standard SMT assembly lines.