Diodes Incorporated MMBZ5227B-7-F

Overview

MMBZ5227B-7-F from Diodes Incorporated is a 3.6 V, ±5.6% tolerance, 350 mW surface-mount Zener diode in SOT23 package, optimized for voltage regulation and overvoltage protection in low-power analog and digital circuits. It delivers 24 Ω dynamic impedance at 20 mA test current, 15 µA reverse leakage at 1.0 V, and operates across –65°C to +150°C.

For engineers reviewing the MMBZ5227B-7-F datasheet, MMBZ5227B-7-F pinout, MMBZ5227B-7-F application, or MMBZ5227B-7-F equivalent, this part serves as a precision, RoHS-compliant, lead-free voltage reference for power rail clamping, signal conditioning, and ESD-tolerant bias networks in space-constrained PCBs.

Technical Context

This Zener diode employs planar die construction for stable breakdown characteristics and low thermal resistance (357°C/W on FR-4). Its 3.6 V nominal zener voltage is specified at 20 mA test current with tight 3.42–3.78 V min/max range and 1.7 kΩ knee impedance at 0.25 mA.

Designed for automated SMT assembly, it features matte tin-plated Alloy 42 leads, moisture sensitivity level 1 per J-STD-020, and UL 94V-0 molded plastic packaging - enabling reliable reflow soldering and long-term stability in industrial and consumer environments.

Key Specifications

Pinout & Package

SOT23 package: 3-terminal plastic surface-mount device with gull-wing leads; terminals are anode, cathode, and unused (cathode-anode configuration confirmed by Diodes DS18011 Rev. 26-2 schematic and top-view marking diagram).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C3V6 and MM3Z3V6T1G, MMBZ5227B-7-F offers optimal balance of low impedance (24 Ω), industry-standard SOT23 compatibility, and 350 mW capability - making it preferred for general-purpose 3.3 V system regulation where reliability, manufacturability, and thermal performance are prioritized over ultra-tight tolerance or maximum surge capacity.

Availability

MMBZ5227B-7-F is available at Aetrix Electronics and suitable for USB interface protection, 3.3 V LDO reference stabilization, and IoT sensor bias networks requiring stable component supply, consistent parametric performance, and full RoHS compliance.

Supply support for MMBZ5227B-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 the Americas.

This device belongs to the MMBZ52xxB series of 350 mW Zener diodes designed specifically for compact, high-reliability voltage regulation in consumer, industrial, and automotive electronics - emphasizing planar consistency, automated assembly readiness, and green material compliance.

FAQ

What is the maximum reverse voltage (V_R) at which MMBZ5227B-7-F guarantees ≤15 µA leakage?

The datasheet specifies 15 µA maximum reverse leakage current at V_R = 1.0 V. This is not a breakdown condition - it reflects off-state leakage well below the 3.6 V zener voltage. The device remains fully non-conductive up to 1.0 V, making it suitable for low-leakage bias and sensing applications where minimal parasitic current is critical.

Can MMBZ5227B-7-F be used in place of a 3.3 V Zener diode?

No - MMBZ5227B-7-F has a nominal zener voltage of 3.6 V (range 3.42–3.78 V), not 3.3 V. Using it as a 3.3 V reference would result in ~9% higher clamping voltage, potentially exceeding safe operating limits of 3.3 V logic or analog components. For 3.3 V regulation, MMBZ5226B (3.3 V) is the correct variant in this series.

Is the SOT23 package of MMBZ5227B-7-F compatible with standard reflow profiles?

Yes - its moisture sensitivity level is rated at Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into standard lead-free reflow profiles (e.g., JEDEC J-STD-020D) without baking. The matte tin finish on Alloy 42 leads ensures robust solderability per MIL-STD-202, Method 208.

Does MMBZ5227B-7-F meet AEC-Q200 requirements for automotive use?

No - the base MMBZ5227B-7-F is not AEC-Q200 qualified. Diodes Incorporated offers automotive-grade versions with "Q" suffixes (e.g., MMBZ5227BQ-7-F) that undergo additional qualification testing, PPAP documentation, and are manufactured in IATF 16949-certified facilities. These Q-suffix parts must be selected explicitly for automotive applications.