onsemi SZMM5Z22VT1G

Overview

SZMM5Z22VT1G from onsemi is a 22 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 55 Ω maximum Zener impedance at 5 mA test current and 0.05 μA reverse leakage at 17.6 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the SZMM5Z22VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W), ESD rating (>16 kV HBM), SOD-523 footprint compatibility, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at nominal 22 V with ±5% initial tolerance. Its 55 Ω dynamic impedance at I_ZT = 5 mA ensures stable regulation under moderate load transients.

Designed for surface-mount use on FR-4 PCBs, it features a 1.20 mm × 0.80 mm body with 0.7 mm height, MSL 1 rating, and 260 °C reflow compatibility. The cathode-anode polarity is marked by a band on terminal 1, per SOD-523 mechanical outline CASE 502 STYLE 1.

Key Specifications

Pinout & Package

SZMM5Z22VT1G is housed in an ultra-compact SOD-523 (CASE 502) surface-mount plastic package measuring 1.20 mm × 0.80 mm × 0.60 mm, with void-free thermosetting epoxy meeting UL 94 V-0, matte tin lead finish, and MSL 1 moisture sensitivity rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C22LT1G and MMSZ5248BT1G, SZMM5Z22VT1G uniquely balances ultra-small SOD-523 size, 500 mW rating, and AEC-Q101 qualification-making it optimal for next-gen automotive and portable designs where volume, thermal performance, and qualification alignment are jointly constrained.

Availability

SZMM5Z22VT1G is available at Aetrix Electronics and suitable for automotive body electronics, smartphone power management, and industrial sensor node designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SZMM5Z22VT1G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

SZMM5Z22VT1G belongs to the MM5Z/SZMM5Z series of miniature Zener regulators designed specifically for high-density portable and automotive electronics where space, reliability, and regulatory compliance are non-negotiable.

FAQ

What is the Zener voltage tolerance of SZMM5Z22VT1G?

SZMM5Z22VT1G has a nominal Zener voltage of 22.0 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 20.8 V and 23.3 V when tested at 5 mA (I_ZT) and 25 °C ambient temperature, as specified in the onsemi Electrical Characteristics table on page 3 of the datasheet.

Is SZMM5Z22VT1G qualified for automotive applications?

Yes, SZMM5Z22VT1G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and control change requirements, per onsemi's ordering information and specification features section.

What is the maximum power dissipation for SZMM5Z22VT1G on a standard PCB?

SZMM5Z22VT1G delivers 500 mW steady-state power dissipation on an FR-4 board with single-sided copper and a 1 cm² mounting pad at 25 °C ambient, derating linearly by 4.0 mW/°C above that temperature, as defined in the Maximum Ratings table of the datasheet.

Does SZMM5Z22VT1G have ESD protection built-in?

Yes, SZMM5Z22VT1G is rated Class 3 for ESD per the Human Body Model (HBM), with a minimum withstand voltage exceeding 16 kV, enabling robust handling during manufacturing and operation without requiring supplemental ESD components in most end-equipment designs.

What package type and dimensions does SZMM5Z22VT1G use?

SZMM5Z22VT1G uses the SOD-523 (CASE 502) surface-mount package with exact dimensions of 1.20 mm × 0.80 mm × 0.60 mm, featuring a banded cathode marking on terminal 1 and matte tin lead finish, as confirmed in the Mechanical Characteristics and Package Dimensions sections of the datasheet.