onsemi SZMM5Z4680T1G

Overview

SZMM5Z4680T1G from onsemi is a 2.2 V nominal Zener voltage regulator diode in SOD−523 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 4 µA reverse leakage at 1 V, and ±10% voltage tolerance - used for precision low-voltage reference and overvoltage clamping in space-constrained portable electronics.

For engineers reviewing the SZMM5Z4680T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.2 V Zener voltage, 500 mW FR−5 board rating, SOD−523 footprint compatibility, AEC−Q101 qualification, and Class 3 ESD robustness (>16 kV HBM).

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and temperature shifts. Its 2.2 V nominal Zener voltage is specified at IZT = 50 µA with ±10% tolerance, and exhibits a typical temperature coefficient near zero in this low-voltage range, minimizing drift in battery-powered systems.

Designed for surface-mount assembly on high-density PCBs, it delivers regulated reference voltage with 4 µA maximum reverse leakage at VR = 1 V and forward voltage ≤0.9 V at IF = 10 mA - enabling low-power sensing and protection functions in compact handheld devices.

Key Specifications

Pinout & Package

Package: SOD−523 (Case 502), dimensions 1.20 × 0.80 × 0.60 mm, 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 BZX584C2V2LT1G and MMSZ4680T1G, SZMM5Z4680T1G uniquely combines AEC−Q101 qualification, 500 mW thermal capability in SOD−523, and 4 µA leakage - making it optimal for space-limited automotive and medical wearables requiring both reliability and miniaturization.

Availability

SZMM5Z4680T1G is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, wearable sensor biasing, and automotive cabin controller reference designs requiring stable component supply with full traceability and lifecycle support.

Supply support for SZMM5Z4680T1G 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.

SZMM5Z4680T1G belongs to the MM5Z4xxx/SZMM5Z4xxx series of miniature Zener regulators - designed specifically for ultra-compact, high-reliability voltage reference and clamping in automotive and portable electronics.

FAQ

What is the Zener voltage tolerance of SZMM5Z4680T1G?

The SZMM5Z4680T1G has a nominal Zener voltage of 2.2 V with a tolerance of ±10%, meaning the actual measured voltage at IZT = 50 µA falls between 2.09 V and 2.31 V. This tight tolerance ensures predictable clamping behavior in precision reference applications, and the value is guaranteed across the full operating temperature range of −55°C to +150°C as verified in onsemi's production testing for SZMM5Z4680T1G.

Is SZMM5Z4680T1G suitable for automotive applications?

Yes, SZMM5Z4680T1G is AEC−Q101 qualified and PPAP capable, with full traceability and process controls required for automotive electronics. Its operating temperature range (−55°C to +150°C), Class 3 HBM ESD rating (>16 kV), and Pb-free RoHS compliance make it appropriate for cabin controllers, body electronics, and ADAS subsystems - all validated per the official onsemi qualification report for SZMM5Z4680T1G.

What is the maximum reverse leakage current for SZMM5Z4680T1G?

The maximum reverse leakage current (IR) for SZMM5Z4680T1G is 4 µA at VR = 1 V and TA = 25°C, as specified in the Electrical Characteristics table on page 3 of the official datasheet. This low leakage supports ultra-low-power operation in always-on monitoring circuits, and the parameter remains stable across temperature due to the device's optimized junction design in SZMM5Z4680T1G.

Can SZMM5Z4680T1G be used as a voltage reference for ADCs?

Yes, SZMM5Z4680T1G serves effectively as a low-drift, low-noise 2.2 V reference for 10–12-bit ADCs in portable instrumentation. Its ±10% voltage tolerance, <0.5% typical TC in the 2.2 V range, and 4 µA leakage ensure stable reference division ratios - especially when paired with a low-pass RC filter, as demonstrated in onsemi application note AND8250/D for SZMM5Z4680T1G-based reference designs.

What packaging options are available for SZMM5Z4680T1G?

SZMM5Z4680T1G is supplied in Pb-free tape-and-reel packaging: 3,000 units per reel (order code SZMM5Z4680T1G) and 8,000 units per reel (order code SZMM5Z4680T5G). Both variants use the same SOD−523 package with identical electrical and thermal specifications - the only difference is reel quantity and part orientation per onsemi's BRD8011/D tape specification for SZMM5Z4680T1G.