onsemi SZMM5Z4689T1G

Overview

SZMM5Z4689T1G from onsemi is a 5.1 V ±5% Zener voltage regulator diode in SOD−523 package, rated for 500 mW power dissipation at TL = 75°C, with 10 μA reverse leakage at VR = 3 V and ESD rating >16 kV (HBM). It serves as a precision voltage reference and overvoltage clamp in space-constrained portable electronics.

For engineers reviewing the SZMM5Z4689T1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal derating behavior, low IZT (50 μA), HBM ESD robustness, and SOD−523 footprint compatibility with high-density PCB assembly.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable output voltage across variable load current by conducting excess current to ground when input exceeds VZ. Its 5.1 V nominal Zener voltage is specified at IZT = 50 μA, with temperature coefficient near zero (±2 mV/°C typical) in this range.

The SOD−523 package enables automated placement and reflow soldering per JEDEC standards, with maximum case temperature of 260°C for 10 seconds. It is AEC−Q101 qualified and Pb−Free/RoHS compliant, supporting automotive and industrial applications requiring controlled change management.

Key Specifications

Pinout & Package

SOD−523 surface-mount package with cathode indicated by polarity band; 2-terminal configuration optimized for automated pick-and-place and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C5V1 and MMSZ5231BT1G, SZMM5Z4689T1G uniquely combines AEC−Q101 qualification, >16 kV HBM ESD rating, and SOD−523 miniaturization - making it the only choice for space-limited automotive or premium consumer electronics requiring both reliability and footprint efficiency.

Availability

SZMM5Z4689T1G is available at Aetrix Electronics and suitable for smartphone power rail protection, automotive cabin controller reference, and wearable sensor bias networks requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SZMM5Z4689T1G 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.

SZMM5Z4689T1G belongs to the MM5Z4xxx/SZMM5Z4xxx series of miniature Zener regulators designed specifically for high-density portable and automotive electronics where board space, ESD resilience, and qualification rigor are critical.

FAQ

What is the Zener voltage tolerance of SZMM5Z4689T1G?

The SZMM5Z4689T1G has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, meaning the actual measured VZ falls between 4.85 V and 5.36 V when tested at IZT = 50 μA and TA = 25°C. This tight tolerance ensures predictable clamping behavior in precision voltage reference and overvoltage protection circuits using the SZMM5Z4689T1G.

Is SZMM5Z4689T1G suitable for automotive applications?

Yes, SZMM5Z4689T1G is AEC−Q101 qualified and PPAP capable, with manufacturing controlled per automotive change requirements (indicated by the "SZ" prefix). It operates across −55°C to +150°C and meets stringent ESD (Class 3, >16 kV HBM) and reliability standards required for cabin and body electronics - confirming its suitability for automotive use cases involving the SZMM5Z4689T1G.

What is the maximum power dissipation for SZMM5Z4689T1G on a standard PCB?

SZMM5Z4689T1G is rated for 500 mW total power dissipation on FR−5 board at lead temperature TL = 75°C, derating linearly at 4.0 mW/°C above that point. This rating assumes minimum recommended footprint and proper thermal relief design - critical for sustained operation in compact power management circuits using the SZMM5Z4689T1G.

Does SZMM5Z4689T1G have a specified temperature coefficient?

Yes, the SZMM5Z4689T1G exhibits a typical temperature coefficient near zero (±2 mV/°C) within its 5.1 V nominal range, as confirmed by onsemi's typical characteristics curves (Figure 1). This low TC minimizes voltage drift over temperature - a key advantage for stable reference generation in systems deploying the SZMM5Z4689T1G across wide ambient ranges.

What packaging options are available for SZMM5Z4689T1G?

SZMM5Z4689T1G is supplied in Pb−Free tape-and-reel packaging: 3,000 units per reel (T1G variant). The SOD−523 package dimensions are 1.20 × 0.80 × 0.60 mm, with cathode identified by a polarity band. No alternate packaging (e.g., T5G or bulk) is listed for this specific part number in the official onsemi datasheet for SZMM5Z4689T1G.