Diodes Incorporated MMBZ5223BW-7-F

Overview

MMBZ5223BW-7-F from Diodes Incorporated is a 2.7 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% zener voltage tolerance at 20 mA test current, with 1300 Ω maximum zener impedance at 1 kHz and 75 μA maximum reverse leakage at 1.0 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the MMBZ5223BW-7-F datasheet, MMBZ5223BW-7-F pinout, MMBZ5223BW-7-F application, or MMBZ5223BW-7-F equivalent, key selection criteria include nominal zener voltage (2.7 V), power rating (200 mW), thermal resistance (625 °C/W), AEC-Q101 qualification, and SOT323 footprint compatibility with automated assembly.

Technical Context

This device operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents, with zener voltage specified at I_ZT = 20 mA and characterized up to 150 °C junction temperature. Its low 200 mW power dissipation and 625 °C/W thermal resistance require careful PCB layout per AP02001 for thermal management.

The diode exhibits 1300 Ω dynamic impedance at 1 kHz and 75 μA reverse leakage at VR = 1.0 V, supporting stable reference performance in battery-powered sensor interfaces and low-current bias networks where minimal quiescent current and predictable knee behavior are critical.

Key Specifications

Pinout & Package

Package: SOT323 - 3-terminal surface-mount plastic case with matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1, weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Compared with BZX384-B2V7 and MMSZ5223B, MMBZ5223BW-7-F offers AEC-Q101 qualification and SOT323 compactness at 200 mW - making it optimal for space-constrained automotive modules requiring certified reliability, whereas alternatives trade qualification for power or footprint flexibility.

Availability

MMBZ5223BW-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog input protection, and portable medical device reference circuits requiring stable component supply and full traceability.

Supply support for MMBZ5223BW-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 MMBZ52xxBW series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for voltage regulation and transient suppression in automotive and industrial control systems where reliability and small form factor are essential.

FAQ

What is the maximum reverse voltage that can be continuously applied without breakdown?

The MMBZ5223BW-7-F has a nominal zener voltage of 2.7 V, with guaranteed breakdown occurring between 2.57 V and 2.84 V at 20 mA test current. Below 1.0 V reverse bias, leakage remains ≤75 μA - so continuous application of ≤1.0 V reverse voltage avoids significant conduction and ensures stable off-state behavior in clamping roles.

Is this diode suitable for use in high-frequency signal paths?

Yes - its typical total capacitance is <5 pF at 1 V reverse bias (per Fig. 4 correlation), and zener impedance drops to ~100 Ω above 100 kHz (per Fig. 5). This makes it appropriate for RF biasing and low-capacitance clamping in sensor front-ends up to ~10 MHz, provided layout minimizes parasitic inductance.

How does the SOT323 package affect thermal performance in real-world PCB layouts?

With R_θJA = 625 °C/W on FR4 using Diodes' AP02001-recommended pad layout, the junction rises ~125 °C at full 200 mW dissipation. To stay within the 150 °C max rating, ambient must remain ≤25 °C - so derating is essential above 70 °C ambient, and thermal vias or copper pours are strongly advised for sustained operation.

Does the "-7-F" suffix indicate tape-and-reel packaging and RoHS compliance?

Yes - "-7-F" denotes 3000-unit tape-and-reel packaging per SOT323 carrier tape, and the "F" explicitly confirms full RoHS compliance (lead-free plating, green molding compound, halogen/antimony-free), as defined in Diodes' DS31037 Rev. 14 documentation and verified per J-STD-020D moisture sensitivity level 1.