Diodes Incorporated MMBZ5225BW-7

Overview

MMBZ5225BW-7 from Diodes Incorporated is a 3.0 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% voltage tolerance at 20 mA test current, with 1600 Ω maximum zener impedance and 50 μA reverse leakage at 1.0 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the MMBZ5225BW-7 datasheet, MMBZ5225BW-7 pinout, MMBZ5225BW-7 application, or MMBZ5225BW-7 equivalent, key selection criteria include nominal zener voltage (3.0 V), power rating (200 mW), zener impedance (≤1600 Ω @ 20 mA), reverse leakage (≤50 μA @ 1.0 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation under varying load and temperature conditions. It features a nominal zener voltage of 3.0 V with tight 2.85–3.15 V range at 20 mA, and exhibits 1600 Ω dynamic impedance at that test current, indicating moderate regulation sensitivity to current changes.

Designed for low-power signal conditioning and rail clamping, it delivers 50 μA maximum reverse leakage at VR = 1.0 V and supports operation from –65 °C to +150 °C. Its SOT323 package enables high-density PCB layouts while meeting AEC-Q101 stress testing requirements for automotive electronics.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small plastic surface-mount case (2.10 mm × 1.30 mm × 0.90 mm), lead-free matte tin terminals, 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 voltage regulation applications.

Compared with BZX384-B3V0,115 and MM3Z3V0T1G, MMBZ5225BW-7 uniquely combines AEC-Q101 qualification, SOT323 miniaturization, and verified 3.0 V regulation performance across extended temperature - making it the default choice for automotive and high-reliability industrial designs where qualification and footprint are jointly critical.

Availability

MMBZ5225BW-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal chains, and medical wearable battery monitoring systems requiring stable component supply and long-term lifecycle support.

Supply support for MMBZ5225BW-7 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 components for automotive, industrial, and consumer markets.

The MMBZ52xxBW series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for voltage reference, rail clamping, and ESD protection in space-constrained automotive ECUs and industrial controllers.

FAQ

What is the maximum reverse voltage (V_R) this diode can withstand before breakdown?

The MMBZ5225BW-7 has a nominal zener voltage of 3.0 V, with guaranteed breakdown occurring between 2.85 V and 3.15 V at 20 mA test current. It is not rated for reverse blocking above its zener range; operation beyond 3.15 V initiates controlled breakdown, not avalanche failure. The 1.0 V reverse leakage specification confirms stable behavior well below nominal V_Z.

Can this Zener diode be used in parallel for higher power handling?

No - parallel connection of Zener diodes like MMBZ5225BW-7 is not recommended due to mismatched zener voltages and thermal runaway risk. Each device's V_Z tolerance (±5%) and differing thermal coefficients cause current hogging. For >200 mW needs, select a single higher-power Zener (e.g., 500 mW SOD-123 variant) or implement active regulation.

Is the SOT323 package compatible with reflow soldering per J-STD-020?

Yes - the MMBZ5225BW-7's SOT323 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity, with matte tin-plated terminals solderable per MIL-STD-202 Method 208. Recommended peak reflow temperature is 260 °C, consistent with standard Pb-free profiles.

Does this part meet halogen-free and RoHS 2 requirements?

Yes - MMBZ5225BW-7 uses a "Green" halogen- and antimony-free molding compound containing <900 ppm bromine, <900 ppm chlorine, and <1000 ppm antimony compounds, and is fully compliant with EU Directive 2011/65/EU (RoHS 2) with no purposely added lead.