Diodes Incorporated MMBD4448DW-7-F

Overview

MMBD4448DW-7-F from Diodes Incorporated is a dual, isolated, surface-mount silicon switching diode in SOT363 package, rated for 75 V peak repetitive reverse voltage, 500 mA forward current, and 4.0 ns reverse recovery time, optimized for high-speed signal routing and logic-level clamping in compact DC-DC converter feedback paths.

For engineers reviewing the MMBD4448DW-7-F datasheet, MMBD4448DW-7-F pinout, MMBD4448DW-7-F application, or MMBD4448DW-7-F equivalent, key selection criteria include dual-element isolation, sub-4 ns tRR performance, low 0.72 V VF at 10 mA, 4.0 pF junction capacitance at 0 V, and JEDEC-qualified reliability for industrial control and automotive-grade derivative compatibility.

Technical Context

This dual diode integrates two electrically isolated P-N junctions in a single SOT363 package, enabling independent signal path management without cross-coupling. Each element supports 75 V VRRM and exhibits fast 4.0 ns reverse recovery under 10 mA IF/IR conditions with 100 Ω load.

The device operates across –55 °C to +150 °C, delivers 200 mW power dissipation on FR-4 with 2 oz copper, and maintains <2.5 μA IR at 75 V and 25 °C - critical for low-leakage bias networks and precision clamp circuits.

Key Specifications

Pinout & Package

Package: SOT363 - 6-pin miniature plastic surface-mount package with dual isolated diode configuration (C1–A1 and C2–A2), matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, and UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed switching diode applications.

Compared with BAT54CDW-7-F and NSR0230P2T5G, the MMBD4448DW-7-F uniquely balances 75 V standoff, dual isolation, and 4 ns speed in one JEDEC-qualified SOT363 package - making it optimal for industrial feedback loops and multi-rail clamping where voltage margin and element independence are critical.

Availability

MMBD4448DW-7-F is available at Aetrix Electronics and suitable for industrial PLC input conditioning, USB 2.0 ESD protection, and DC-DC converter feedback clamping requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MMBD4448DW-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The MMBD4448DW-7-F belongs to Diodes' high-speed switching diode product line, engineered specifically for compact, high-reliability signal routing and voltage clamping in industrial automation, automotive subsystems, and consumer power management.

FAQ

What is the maximum operating temperature for MMBD4448DW-7-F?

The MMBD4448DW-7-F is rated for junction and storage temperatures from –55 °C to +150 °C. Its thermal resistance (RθJA) is 625 °C/W on FR-4 with 1-inch², 2 oz copper, allowing full 200 mW power dissipation up to +70 °C ambient before derating begins per Figure 1 in the datasheet.

Does MMBD4448DW-7-F support automotive qualification?

The MMBD4448DW-7-F itself is not AEC-Q200 qualified, but Diodes offers automotive-grade equivalents (e.g., MMBD4448DWQ-7-F) with PPAP documentation, IATF 16949 manufacturing, and AEC-Q200 stress testing. The base part meets JEDEC high-reliability standards and serves as the foundation for those qualified variants.

How are the NC pins used in PCB layout?

Pins 3 and 6 are internally unconnected and must remain electrically floating. They may be left unmasked or tied to ground for mechanical stability, but must never be routed to active nets. Diodes recommends avoiding solder mask openings on these pads to prevent accidental shorts during reflow or inspection.

Can MMBD4448DW-7-F replace a single 1N4148 in circuit design?

Yes - either diode element (C1/A1 or C2/A2) can substitute for a single 1N4148 in through-hole or SMT layouts, offering identical 4 ns tRR and lower VF (0.72 V vs. typical 0.85 V). However, the dual configuration requires explicit use of only one channel and proper termination of the unused element's terminals per application requirements.