Diodes Incorporated MMBD4448HCDW-7-F

Overview

MMBD4448HCDW-7-F from Diodes Incorporated is a dual-channel surface-mount fast switching diode array in SOT363 package, rated for 80 V peak repetitive reverse voltage, 500 mA forward current, and 4 ns reverse recovery time. It delivers low forward voltage (0.72 V max at 5 mA), low reverse leakage (100 nA max at 70 V), and low junction capacitance (3.5 pF max), enabling high-speed signal routing in compact digital logic interfaces and level-shifting circuits.

For engineers reviewing the MMBD4448HCDW-7-F datasheet, MMBD4448HCDW-7-F pinout, MMBD4448HCDW-7-F application, or MMBD4448HCDW-7-F equivalent, key selection criteria include reverse recovery speed, low-leakage performance at elevated temperature, dual-diode integration in space-constrained layouts, and AEC-Q101 qualification eligibility across the H-series family.

Technical Context

This dual common-cathode diode array integrates two independent silicon switching diodes sharing a single cathode terminal (Pin 3), optimized for high-frequency signal steering, clamping, and logic-level translation. Its 4 ns trr and 3.5 pF CT support operation up to ~100 MHz in discrete gate-drive or data-line protection paths.

The device operates across –55°C to +150°C with thermal resistance of 625°C/W (junction-to-ambient, FR-4 PCB), and maintains stable IR ≤ 50 µA at 75 V and +150°C - critical for automotive and industrial sensor interface reliability.

Key Specifications

Pinout & Package

SOT363 is a 6-pin, dual-row surface-mount plastic package with gull-wing leads and a common cathode configuration. Pin 1 and Pin 2 are anode terminals for Diode 1 and Diode 2 respectively; Pin 3 is the shared cathode; Pins 4–6 are NC (no internal connection).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast-switching diode array applications.

Compared with BAT54CWS-7-F and NSR0230P2T5G, MMBD4448HCDW-7-F uniquely combines 80 V rating, dual-anode/common-cathode topology, and 4 ns switching in a space-efficient SOT363-making it the only choice for compact, high-reliability 24–48 V industrial signal conditioning.

Availability

MMBD4448HCDW-7-F is available at Aetrix Electronics and suitable for industrial PLC input protection, automotive sensor signal conditioning, and high-speed data line clamping requiring stable component supply, long-term lifecycle assurance, and traceable green sourcing.

Supply support for MMBD4448HCDW-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the U.S., and manufacturing in IATF16949-certified facilities.

The MMBD4448H series targets high-reliability signal integrity applications-specifically engineered for fast switching, low-leakage operation, and AEC-Q101 readiness in automotive and industrial environments.

FAQ

Is MMBD4448HCDW-7-F AEC-Q101 qualified?

No - MMBD4448HCDW-7-F itself is not AEC-Q101 certified. However, the functionally identical MMBD4448HADWQ-7-F variant is fully AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities. Both share identical electrical specs and SOT363 packaging; only change control and qualification documentation differ.

What is the thermal derating behavior above 25°C ambient?

Power dissipation linearly derates from 200 mW at 25°C to zero at 150°C, following a slope of –1.6 mW/°C (R_θJA = 625°C/W). At 85°C ambient, maximum continuous power drops to 104 mW - sufficient for 500 mA forward current only if VF remains ≤ 0.21 V, confirming typical operation stays well within safe limits.

Can Pin 4–6 be used as thermal vias or ground connections?

No - Pins 4–6 are internally unconnected (NC) with no bond wire or die attachment. They serve only as mechanical anchors and thermal mass. Routing them to ground or using as thermal vias provides no electrical benefit and risks solder bridging; Diodes' recommended pad layout treats them as non-functional.

How does reverse leakage vary at 150°C?

At 150°C and VR = 75 V, IR is specified at ≤50 µA - a 500× increase over the 25°C/70 V rating of 100 nA. This is confirmed in Figure 3 of DS30153 Rev. 20-2. Designers must verify system-level bias stability under worst-case thermal conditions, especially in high-impedance sensor bias networks.