Nexperia USA Inc. SZMM5Z3V0T5GF

Overview

SZMM5Z3V0T5GF from Nexperia is a 3.0 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, designed for precision voltage regulation and reference functions in space-constrained PCBs. It delivers 3.0 V nominal Zener voltage at I_Z = 5 mA, with differential resistance of 10.0 Ω, temperature coefficient of −3.5 to 0 mV/K, and AEC-Q101 qualification for automotive use.

For engineers reviewing the SZMM5Z3V0T5GF datasheet, SZMM5Z3V0T5GF pinout, SZMM5Z3V0T5GF application, or SZMM5Z3V0T5GF equivalent, this device is selected for low-power biasing, overvoltage clamping, and stable reference generation where ultra-small footprint and tight voltage tolerance are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a tightly controlled 2.94 V to 3.06 V working voltage range at 5 mA test current. Its low 10.0 Ω differential resistance ensures minimal voltage shift under load variation, while its −3.5 to 0 mV/K temperature coefficient enables stable regulation across −55 °C to +150 °C ambient.

The device supports non-repetitive surge handling up to 40 W (100 µs square wave), with continuous power dissipation limited to 300 mW on FR4 PCB (35 mm² copper at cathode). Its 425 pF capacitance at 1 MHz and 0 V reverse bias makes it suitable for low-frequency regulation-not high-speed signal conditioning.

Key Specifications

Pinout & Package

Package: SOD523 (SC-79), ultra-small surface-mount plastic package with flat lead profile and cathode marking bar. Dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 2-terminal configuration optimized for high-density routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C3V0 and MMSZ5226B, SZMM5Z3V0T5GF offers superior voltage accuracy (±2 % vs. ±5 %), lower dynamic impedance (10 Ω vs. 28–90 Ω), and automotive qualification-making it optimal for space-constrained, high-stability automotive and industrial reference designs.

Availability

SZMM5Z3V0T5GF is available at Aetrix Electronics and suitable for automotive cabin control modules, industrial sensor signal conditioners, USB-C power delivery monitors, and smart meter reference subsystems requiring stable component supply with AEC-Q101 assurance.

Supply support for SZMM5Z3V0T5GF 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

SZMM5Z series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient protection in automotive ECUs, industrial sensors, and portable electronics where miniaturization and thermal robustness are essential.

FAQ

What is the maximum continuous reverse current this Zener can handle at 25 °C?

The maximum continuous reverse current is derived from total power dissipation: at 3.0 V Zener voltage and 300 mW P_tot, the absolute maximum DC reverse current is 100 mA. However, sustained operation above 25 mA requires thermal derating per the R_th(j-a) = 350 K/W specification to avoid exceeding 150 °C junction temperature.

Can SZMM5Z3V0T5GF be used as a forward-biased clamp in digital I/O protection?

Yes-it exhibits 1.1 V forward voltage at 100 mA, making it suitable for low-voltage I/O clamping. Its 200 mA absolute maximum forward current (per limiting values table) and 425 pF capacitance support protection of 3.3 V logic lines against ESD and short-duration transients without signal integrity degradation.

How does the −3.5 to 0 mV/K temperature coefficient affect regulation accuracy at 105 °C?

Over a 80 °C rise from 25 °C to 105 °C, worst-case drift is 80 K × |−3.5 mV/K| = 280 mV, shifting V_Z from 3.00 V to ~2.72 V. In practice, typical TC is near 0 mV/K above 50 °C, so actual drift remains within ±50 mV-verified in Fig. 4 of the datasheet for 3V0 devices.

Is the SOD523 package compatible with standard reflow profiles for lead-free assembly?

Yes-the device is qualified for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C. The recommended solder land pattern (Fig. 10) uses 0.5 mm pad width and 1.4 mm center-to-center spacing, matching standard SOD523 stencil apertures and ensuring reliable void-free solder joints.