onsemi SZMM5Z4V7ST5G

Overview

SZMM5Z4V7ST5G from onsemi is a 4.55 V to 4.75 V tight-tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 80 Ω max Zener impedance at 5 mA test current and 2.0 µA max reverse leakage at 3.0 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the SZMM5Z4V7ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±2.1%), thermal resistance (250 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and Pb-free RoHS-compliant construction.

Technical Context

This device operates as a two-terminal voltage reference diode with sharp reverse breakdown behavior, designed for stable regulation under low-current conditions (IZT = 5 mA). Its 800 Ω max ZZK at 1.0 mA and ±0.2 mV/°C temperature coefficient support stable biasing in temperature-varying environments.

The SOD-523 package enables high-density PCB layouts with minimal footprint (1.20 mm × 0.80 mm) and low profile (0.7 mm height), while its Class 3 ESD rating ensures robustness during handling and assembly in automated SMT lines.

Key Specifications

Pinout & Package

SZMM5Z4V7ST5G is housed in a surface-mount SOD-523 (Case 502) package with void-free thermosetting plastic body, matte tin lead finish, and MSL 1 reflow compatibility up to 260 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C4V7 and MMSZ4700T1G, SZMM5Z4V7ST5G delivers tighter voltage control (±2.1% vs. ±5%), lower dynamic impedance (80 Ω vs. ≥100 Ω), and automotive-grade qualification - making it optimal for space-constrained, high-reliability applications where regulation accuracy and thermal stability are critical.

Availability

SZMM5Z4V7ST5G is available at Aetrix Electronics and suitable for smartphone power management, automotive body control modules, and wearable health monitors requiring stable component supply with guaranteed long-term sourcing.

Supply support for SZMM5Z4V7ST5G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MM5Z/SZMM5Z series targets compact, high-reliability voltage regulation in portable and automotive electronics, emphasizing tight tolerance, small form factor, and AEC-Q101 compliance.

FAQ

What is the Zener voltage range for SZMM5Z4V7ST5G?

The SZMM5Z4V7ST5G has a specified Zener voltage range of 4.55 V to 4.75 V at a test current of 5 mA. This ±2.1% tolerance ensures precise voltage clamping or referencing in sensitive analog circuits. The value is measured under standard conditions (T_A = 25 °C) and remains stable across its full operating temperature range of −65 °C to +150 °C. SZMM5Z4V7ST5G is not a fixed-point reference but a tightly controlled discrete Zener diode optimized for regulation rather than metrology-grade accuracy.

Is SZMM5Z4V7ST5G qualified for automotive use?

Yes, SZMM5Z4V7ST5G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating compliance for automotive and other applications requiring unique site and control change requirements. It meets stringent reliability testing including temperature cycling, humidity bias, and mechanical shock per AEC standards. SZMM5Z4V7ST5G is suitable for non-safety-critical automotive subsystems such as body control modules, infotainment power rails, and sensor interface protection.

What is the maximum power dissipation of SZMM5Z4V7ST5G?

SZMM5Z4V7ST5G has a maximum steady-state power dissipation of 500 mW at ambient temperature (T_A) = 25 °C on an FR-4 board with a 1 cm² copper pad. Power must be derated linearly at 4.0 mW/°C above 25 °C, reaching zero at approximately 150 °C ambient. Thermal resistance from junction-to-ambient is 250 °C/W, meaning a 500 mW load generates ~125 °C junction rise above ambient - confirming its suitability for moderate-power regulation tasks in thermally managed layouts.

Does SZMM5Z4V7ST5G have ESD protection?

Yes, SZMM5Z4V7ST5G is rated Class 3 per Human Body Model (HBM) with ESD withstand capability exceeding 16 kV. This level of protection is built into the device structure and does not require external components. The high ESD rating makes SZMM5Z4V7ST5G suitable for direct integration into handheld and portable electronics assembly lines, reducing risk of field failures due to handling-induced damage. This specification is verified per JEDEC JS-001.

What package type is used for SZMM5Z4V7ST5G?

SZMM5Z4V7ST5G uses the SOD-523 (Case 502) surface-mount package, measuring 1.20 mm × 0.80 mm × 0.70 mm with a cathode-marked polarity band. It features void-free thermosetting plastic encapsulation, 100% matte tin lead finish, and MSL 1 moisture sensitivity rating compatible with standard 260 °C reflow profiles. The compact size supports high-density PCB layouts where board space is constrained, such as in smartphones and wearables.