onsemi SZMM3Z13VST1G

Overview

SZMM3Z13VST1G from onsemi is a 13 V ±4.5% Zener diode in SOD−323 package, rated for 500 mW steady-state power dissipation, 160 Ω dynamic impedance at 5 mA test current, and 8 µA reverse leakage at 10.4 V, used for precision voltage reference and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the SZMM3Z13VST1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±4.5%), thermal resistance (250 °C/W with heatsink), AEC−Q101 qualification, Pb−free RoHS compliance, and SOD−323 footprint compatibility in high-density PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference by maintaining stable reverse breakdown at 12.91–13.49 V under 5 mA test current, with temperature coefficient of +7.0 mV/°C and capacitance ≤120 pF at 0 V bias. Its low 0.9 V forward voltage enables bidirectional clamping when paired with series components.

Designed for surface-mount assembly on FR-4 boards, it supports 260 °C soldering for 10 seconds and achieves Class 3 ESD robustness (>16 kV HBM). The cathode band marking and polarity-defined pinout ensure unambiguous orientation during automated placement.

Key Specifications

Pinout & Package

SOD−323 surface-mount package: 1.70 mm × 1.25 mm × 0.85 mm body, 0.9 mm height, cathode indicated by polarity band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B13,115 and MMSZ4687T1G, SZMM3Z13VST1G uniquely combines AEC−Q101 qualification, 1.7 mm × 1.25 mm SOD−323 footprint, and ±4.5% V_Z tolerance-enabling automotive and space-constrained industrial designs without trade-offs in reliability or size.

Availability

SZMM3Z13VST1G is available at Aetrix Electronics and suitable for smartphone power management, automotive cabin sensors, and industrial IoT edge nodes requiring stable component supply, automotive-grade reliability, and ultra-compact packaging.

Supply support for SZMM3Z13VST1G 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/SZMM3Z series delivers tight-tolerance, low-profile Zener diodes optimized for voltage regulation and ESD protection in high-density portable and automotive electronics where board space and reliability are critical.

FAQ

What is the nominal Zener voltage and tolerance of SZMM3Z13VST1G?

The SZMM3Z13VST1G has a nominal Zener voltage of 13 V with a tolerance of ±4.5%, specified as 12.91 V minimum to 13.49 V maximum at 5 mA test current. This tight tolerance ensures precise voltage regulation in reference and protection circuits without requiring trimming or calibration. The value is measured under standard conditions per the onsemi datasheet Rev. 27, March 2025.

Is SZMM3Z13VST1G qualified for automotive applications?

Yes, SZMM3Z13VST1G is AEC−Q101 qualified and PPAP capable, with validation across temperature cycling, humidity testing, and mechanical stress per automotive reliability standards. The "SZ" prefix explicitly denotes automotive-grade process control and site-specific change management, making SZMM3Z13VST1G suitable for cabin sensors, infotainment power supplies, and other non-safety-critical automotive subsystems.

What is the maximum power dissipation and thermal resistance of SZMM3Z13VST1G?

SZMM3Z13VST1G has a steady-state power rating of 500 mW when mounted on an FR-4 PCB with a 38 mm² copper heatsink, corresponding to a thermal resistance of 250 °C/W. Without heatsink (standard 1 cm² pad), its rating drops to 300 mW with R_JA = 416 °C/W. Derating is linear above 25°C ambient, at 4.0 mW/°C with heatsink and 2.4 mW/°C without.

Does SZMM3Z13VST1G have ESD protection, and what level is specified?

SZMM3Z13VST1G is rated for Class 3 HBM ESD protection with >16 kV withstand capability, verified per JEDEC JS-001. This level ensures robustness against electrostatic discharge during handling, PCB assembly, and end-use environments-critical for portable electronics and automotive modules exposed to human contact or dry-air conditions.

What are the physical dimensions and marking convention for SZMM3Z13VST1G?

SZMM3Z13VST1G uses the SOD−323 package measuring 1.70 mm × 1.25 mm × 0.85 mm, with cathode identified by a visible polarity band. Per the datasheet, its marking code is "TQ", followed by date code and Pb−free indicator ("G"). The device is shipped in 3,000-unit tape-and-reel format compatible with standard pick-and-place equipment.