Diodes Incorporated MMBD4448HADW-7-F

Overview

MMBD4448HADW-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 and clamping in compact power management and interface circuits.

For engineers reviewing the MMBD4448HADW-7-F datasheet, MMBD4448HADW-7-F pinout, MMBD4448HADW-7-F application, or MMBD4448HADW-7-F equivalent, key selection criteria include its dual-diode configuration with common-cathode topology, AEC-Q101 qualification for automotive use, SOT363 thermal performance (625 °C/W RθJA), and compatibility with high-frequency (>100 MHz) signal conditioning and ESD protection circuits.

Technical Context

This dual diode array integrates two independent, matched silicon PN junctions in a single SOT363 package with shared cathode connection (pin 3). Its design targets high-speed switching in signal path protection, level shifting, and logic clamping where low trr and minimal CT are critical to preserve edge integrity.

The device operates across –55 °C to +150 °C, supports 200 mW total power dissipation on FR-4 PCB, and maintains stable VF and IR over temperature - verified by characterization curves for VF vs. IF and IR vs. VR across five temperature points.

Key Specifications

Pinout & Package

Package: SOT363 - 6-pin, 2.2 mm × 2.1 mm × 1.0 mm surface-mount plastic package with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAV99W-7-F and NSR0230P2T5G, MMBD4448HADW-7-F uniquely combines AEC-Q101 qualification, dual-diode common-cathode topology, and 80 V blocking in SOT363 - making it the sole option for space-constrained, high-reliability automotive signal line protection requiring simultaneous dual-rail clamping.

Availability

MMBD4448HADW-7-F is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive LIN bus clamping, and high-speed logic level translation requiring stable component supply, full RoHS compliance, and AEC-Q101 validation.

Supply support for MMBD4448HADW-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 MMBD4448H series belongs to Diodes' high-speed switching diode product line, engineered specifically for signal integrity preservation in automotive, industrial, and high-data-rate communication systems where low trr, low CT, and robust thermal performance are mandatory.

FAQ

Is MMBD4448HADW-7-F pin-compatible with MMBD4448HCQW-7-F?

No - MMBD4448HADW-7-F uses SOT363 package with six terminals, while MMBD4448HCQW-7-F uses SOT353 (five-terminal) package. Pin counts and layouts differ: SOT363 has pins 1–2–3–4–5–6 with two NC pins, whereas SOT353 has pins 1–2–3–4–5 with no pin 6. PCB layout and footprint are not interchangeable.

What is the maximum operating temperature for continuous use?

The device is rated for continuous operation from –55 °C to +150 °C junction temperature. At ambient temperatures above 85 °C, derating is required per Figure 1: power dissipation must be reduced linearly from 200 mW at 25 °C to zero at 150 °C, based on 625 °C/W thermal resistance.

Does MMBD4448HADW-7-F support bidirectional ESD protection?

No - it is a unidirectional dual-diode array with common cathode (pins 1 & 2 anodes, pin 3 cathode). For bidirectional protection, external circuitry (e.g., adding a series resistor and TVS to ground) or a dedicated bidirectional array like D3V3M1U2SOT-7 is required.

Can this part replace BAT54S in existing designs?

Only with layout and electrical verification: BAT54S is a common-cathode dual Schottky diode (VF ≈ 0.3 V), while MMBD4448HADW-7-F is a silicon PN diode (VF ≈ 0.72 V). The higher VF increases conduction loss, but the 80 V VRRM and AEC-Q101 rating may justify substitution in automotive applications where Schottky leakage or voltage rating is insufficient.