onsemi SZMM3Z16VT1G

Overview

SZMM3Z16VT1G from onsemi is a 16.2 V nominal Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 40 Ω maximum dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 11.2 V, used for precision voltage reference and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the SZMM3Z16VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±6.3% at 16.2 V), thermal resistance (416 °C/W), AEC−Q101 qualification, Pb−free SOD−323 footprint compatibility, and ESD robustness (>16 kV HBM).

Technical Context

This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp voltage across sensitive circuit nodes. Its Zener voltage exhibits +10.4 mV/°C temperature coefficient and maintains regulation within ±6.3% over the full 15.3–17.1 V range at IZT = 5 mA.

The SOD−323 package enables high-density PCB layout with 1.7 mm × 1.25 mm body and 0.9 mm height. It supports reflow soldering up to 260°C for 10 seconds and delivers 105 pF capacitance at 0 V bias and 1 MHz, minimizing signal coupling in RF-adjacent applications.

Key Specifications

Pinout & Package

SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode indicated by polarity band. Compatible with standard 0805 reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B16,115 and MMSZ5245B-TP, SZMM3Z16VT1G uniquely combines AEC−Q101 qualification, >16 kV ESD rating, and minimal 1.7 mm × 1.25 mm footprint-making it the only option for space-constrained automotive sensor nodes requiring both reliability and miniaturization.

Availability

SZMM3Z16VT1G is available at Aetrix Electronics and suitable for smartphone power management, automotive cabin sensor biasing, and high-density PC board protection requiring stable component supply, consistent lead times, and full traceability.

Supply support for SZMM3Z16VT1G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

SZMM3ZxxxT1G series belongs to onsemi's precision Zener regulator portfolio designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in automotive and portable electronics.

FAQ

What is the Zener voltage tolerance of SZMM3Z16VT1G?

The SZMM3Z16VT1G has a Zener voltage range of 15.3 V to 17.1 V at 5 mA test current, corresponding to a ±6.3% tolerance around the nominal 16.2 V value. This tolerance is specified under TA = 25°C and is confirmed in the Electrical Characteristics table of the official onsemi datasheet (Rev. 11, September 2014). The SZMM3Z16VT1G maintains this specification across its qualified operating temperature range.

Is SZMM3Z16VT1G suitable for automotive applications?

Yes, SZMM3Z16VT1G 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. Its −65°C to +150°C junction temperature range, 16 kV HBM ESD rating, and validated reliability testing make SZMM3Z16VT1G appropriate for under-hood and cabin electronics where environmental stress is elevated.

What is the maximum power dissipation of SZMM3Z16VT1G at 85°C ambient?

At 85°C ambient, SZMM3Z16VT1G's power dissipation is derated linearly from 300 mW at 25°C using the 2.4 mW/°C derating factor. The calculation yields 300 mW − (85 − 25) × 2.4 mW = 156 mW. This value is confirmed in the Maximum Ratings table and applies to FR-4 boards with 1 cm² copper pad, defining the safe continuous operating limit for thermal design.

Does SZMM3Z16VT1G have a Pb−free package?

Yes, SZMM3Z16VT1G is manufactured in a Pb−free SOD−323 package, compliant with RoHS Directive 2011/65/EU. The datasheet explicitly states "These are Pb−Free Devices" and specifies lead plating as Sn-only. The "G" suffix in the part number denotes Pb−free packaging, and the device meets JEDEC J-STD-609A Class 1 moisture sensitivity requirements.

What is the reverse leakage current of SZMM3Z16VT1G at 11.2 V?

The reverse leakage current (I_R) of SZMM3Z16VT1G is guaranteed ≤0.05 µA at VR = 11.2 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in battery-backed systems and ensures minimal parasitic current draw in always-on sensor bias networks using SZMM3Z16VT1G.