onsemi MM3Z22VC

Overview

MM3Z22VC from onsemi is a 22 V ±5% tolerance Zener diode in SOD−323FL package, rated for 200 mW power dissipation, with 51 Ω zener impedance at 5 mA test current and 0.045 µA reverse leakage at 15.4 V, used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the MM3Z22VC datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance at IZT, thermal resistance (595 °C/W), reverse leakage at VR, and SOD−323FL footprint compatibility in space-constrained PCB designs.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction, optimized for stable DC regulation under low-current conditions (IZT = 5 mA). Its 22 V nominal zener voltage falls within the MM3Z2V4C–MM3Z75VC family's full 2.4–75 V range.

The SOD−323FL package enables surface-mount integration with matte tin finish and Pb-free/RoHS compliance. Thermal resistance of 595 °C/W assumes mounting on PCB with minimum land pad, limiting continuous power handling without derating.

Key Specifications

Pinout & Package

SOD−323FL package: ultra-thin, surface-mount plastic case with cathode band marking; dimensions per Case 477AB outline; matte tin (Sn) finish; Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B22 and MMSZ5247B, the MM3Z22VC offers the lowest profile (SOD−323FL), tightest thermal resistance control for thin PCBs, and optimal balance of leakage (0.045 µA) and impedance (51 Ω) for modern low-power reference circuits - making it preferred for next-generation space-constrained designs.

Availability

MM3Z22VC is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery reference, and automotive cabin control panel applications requiring stable component supply and consistent parametric performance across production lots.

Supply support for MM3Z22VC 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MM3Z series was designed specifically for high-volume, space-constrained voltage reference and regulation tasks in consumer, industrial, and automotive electronics - emphasizing small-footprint reliability, tight tolerance, and environmental compliance.

FAQ

What is the maximum power dissipation of the MM3Z22VC at room temperature?

The MM3Z22VC has a maximum power dissipation (P_D) of 200 mW at ambient temperature (T_A) = 25 °C. This rating assumes mounting on a PCB with minimum land pad; derating is required above 25 °C per the thermal resistance of 595 °C/W. Exceeding 200 mW risks junction temperature exceeding 150 °C, potentially degrading long-term reliability. The MM3Z22VC must be thermally managed in continuous operation scenarios.

Does the MM3Z22VC meet RoHS and lead-free requirements?

Yes, the MM3Z22VC features a matte tin (Sn) finish and is explicitly stated as Pb-free and RoHS compliant in the official onsemi datasheet (Rev. 3, August 2023). It conforms to Directive 2011/65/EU and subsequent amendments, with no exemptions applied. This makes the MM3Z22VC suitable for commercial, industrial, and medical products sold in EU, China, Korea, and other regulated markets requiring full RoHS compliance.

What is the reverse leakage current specification for the MM3Z22VC?

The MM3Z22VC specifies a maximum reverse leakage current (I_R) of 0.045 µA at a reverse voltage (V_R) of 15.4 V, tested at T_A = 25 °C. This ultra-low leakage supports high-impedance bias networks and battery-sensitive applications. Leakage increases with temperature and voltage; actual values at 22 V or elevated temperatures must be verified from the datasheet's typical curves or derated per application requirements.

How is the zener voltage tolerance defined for the MM3Z22VC?

The MM3Z22VC carries a ±5% zener voltage tolerance, meaning its nominal 22 V rating spans 20.9 V (min) to 23.1 V (max) at I_ZT = 5 mA and T_A = 25 °C. This tolerance is guaranteed across production lots and is not subject to further binning. The "C" suffix in MM3Z22VC explicitly denotes the ±5% grade, distinguishing it from tighter-tolerance variants not offered in this family.

What package type does the MM3Z22VC use, and what are its key mechanical features?

The MM3Z22VC uses the SOD−323FL package (Case 477AB), an ultra-thin surface-mount plastic case with cathode band marking. Key features include 0.5 mm max height, matte tin (Sn) finish, Pb-free construction, and RoHS compliance. Its footprint matches JEDEC standard SOD-323 but with reduced thickness - critical for slim handheld and wearable devices where board stack height is constrained.