Nexperia USA Inc. SZMM5Z8V2T5GF

Overview

SZMM5Z8V2T5GF from Nexperia is an AEC-Q101-qualified Zener diode in SOD523 (SC-79) package, designed for precision voltage regulation and reference functions in space-constrained automotive and industrial circuits. It delivers a nominal 8.2 V Zener voltage at 5 mA with ±2 % tolerance, 0.7 Ω differential resistance, and 300 mW total power dissipation - enabling stable biasing in sensor interfaces and power supply feedback paths.

For engineers reviewing the SZMM5Z8V2T5GF datasheet, SZMM5Z8V2T5GF pinout, SZMM5Z8V2T5GF application, or SZMM5Z8V2T5GF equivalent, key selection criteria include its low r_diff, tight V_Z tolerance, AEC-Q101 qualification, and thermal resistance of 65 K/W to solder point - critical for reliability in automotive body control modules and industrial sensor signal conditioning.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 8.04 V to 8.36 V at I_Z = 5 mA, exhibiting a positive temperature coefficient of +3.2 mV/K to +6.2 mV/K across 25 °C–150 °C. Its low 0.7 Ω differential resistance ensures minimal voltage drift under load variation.

It supports non-repetitive surge handling up to 40 W (t_p = 100 µs), while maintaining continuous operation within 300 mW at T_amb = 25 °C on FR4 PCB with 35 mm² copper area. Junction-to-solder-point thermal resistance is 65 K/W, enabling effective heat transfer in compact layouts.

Key Specifications

Pinout & Package

The SZMM5Z8V2T5GF is housed in a SOD523 (SC-79) ultra-small surface-mount plastic package measuring 1.25 mm × 0.85 mm × 0.65 mm, with cathode identified by a marking bar on the device top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C8V2 and MMSZ5231BT1G, SZMM5Z8V2T5GF uniquely combines AEC-Q101 qualification, ±2 % tolerance, and ultra-compact SOD523 packaging - making it optimal for automotive and high-density industrial designs where precision and reliability are non-negotiable.

Availability

SZMM5Z8V2T5GF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and full traceability.

Supply support for SZMM5Z8V2T5GF 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 general-purpose Zener diode product line, engineered specifically for space-constrained, high-stability voltage regulation in automotive and industrial environments.

FAQ

What is the maximum continuous forward current rating for SZMM5Z8V2T5GF?

The device is rated for a maximum forward current of 200 mA per Absolute Maximum Ratings (Table 5). However, it is intended for reverse-bias Zener operation; forward conduction is limited to brief pulses (e.g., ESD events) and should not be used for sustained forward conduction in design.

Can SZMM5Z8V2T5GF be used in parallel for higher power dissipation?

No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, minor V_Z mismatches cause current hogging. Parallel operation is not recommended; instead, select a higher-power-rated Zener or use active regulation for >300 mW loads.

How does the 65 K/W junction-to-solder-point thermal resistance impact PCB layout?

This value assumes direct thermal coupling from the cathode pad to a ≥35 mm² copper pour. Layout must replicate this condition: use solid copper fill under the cathode pad, avoid thermal relief spokes, and minimize trace length to thermal vias - otherwise, actual R_th(j-sp) will degrade and junction temperature will exceed 150 °C.

Is the 40 W non-repetitive peak power rating applicable to ESD protection?

No - the 40 W rating applies only to single 100 µs square-wave surges at 25 °C ambient, per IEC 61000-4-5 testing conditions. For ESD (IEC 61000-4-2), the device offers limited clamping performance; dedicated TVS diodes like PESD5V0S1BA are recommended for robust ESD protection.