Nexperia USA Inc. SZMM3Z6V8T1GX

Overview

SZMM3Z6V8T1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and clamping in low-power circuits. It delivers a nominal 6.8 V Zener voltage (6.47–7.14 V), ±5 % tolerance, 0.5 Ω differential resistance at I_Z = 5 mA, 3.5 µA reverse current at V_R = 6.2 V, and AEC-Q101 qualification for automotive use.

For engineers reviewing the SZMM3Z6V8T1GX datasheet, SZMM3Z6V8T1GX pinout, SZMM3Z6V8T1GX application, or SZMM3Z6V8T1GX equivalent, key selection criteria include Zener voltage accuracy, low r_diff, thermal stability (S_Z = +1.2 to +4.5 mV/K), junction temperature rating (150 °C), and SOD323 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable DC voltage under varying load and line conditions. Its low 0.5 Ω differential resistance ensures minimal voltage deviation across 1–10 mA Zener current range, while the +1.2 to +4.5 mV/K temperature coefficient enables predictable drift compensation in temperature-sensitive references.

Designed for surface-mount reliability, it supports non-repetitive peak reverse power dissipation up to 40 W (t_p = 100 µs) and continuous power dissipation of 300 mW at T_amb = 25 °C on FR4 PCB. The AEC-Q101 qualification confirms robustness for automotive ambient temperature range (−55 °C to +150 °C) and mechanical stress requirements.

Key Specifications

Pinout & Package

SOD323 (SC-76) plastic surface-mounted package with two terminals: compact 1.35 mm × 0.85 mm body, 0.45 mm nominal height, and cathode indicated by a visible 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 BZX384-B6V8,115, SZMM3Z6V8T1GX trades ±2 % tolerance for superior regulation stiffness (0.5 Ω vs. 15 Ω); versus MMSZ4689T1G, it offers identical electrical specs in a 35 % smaller footprint but with lower absolute power rating.

Availability

SZMM3Z6V8T1GX is available at Aetrix Electronics and suitable for automotive sensor references, industrial power supply clamps, and consumer USB-C PD feedback circuits requiring stable component supply, AEC-Q101 compliance, and SOD323 footprint consistency.

Supply support for SZMM3Z6V8T1GX 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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.

SZMM3Z6V8T1GX belongs to the SZMM3Z series of general-purpose Zener diodes engineered for high-reliability voltage regulation and clamping in space-constrained, thermally demanding applications-especially where AEC-Q101 qualification is mandatory.

FAQ

What is the maximum continuous power dissipation for SZMM3Z6V8T1GX?

The total power dissipation is rated at 300 mW at ambient temperature of 25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on R_th(j-a) = 415 K/W, and junction temperature must not exceed 150 °C under any operating condition.

How does the temperature coefficient affect regulation accuracy over temperature?

At 6.8 V nominal, the temperature coefficient ranges from +1.2 to +4.5 mV/K. This means the Zener voltage increases by approximately 1.2–4.5 mV per degree Celsius rise in junction temperature, requiring thermal design margining in precision references where ±10 mV stability is critical across −40 °C to +125 °C.

Can SZMM3Z6V8T1GX replace older MMBZ5236B-style Zeners?

No-MMBZ5236B uses SOT-23 package (3-pin, anode/cathode/common), while SZMM3Z6V8T1GX is a 2-terminal SOD323 device with different thermal and electrical characteristics. Direct replacement requires PCB footprint revision and validation of r_diff, I_R, and surge capability against the target application's stress profile.

Is the cathode marking bar visible under automated optical inspection (AOI)?

Yes-the cathode is marked by a distinct bar on the top surface of the SOD323 package, aligned with Pin 1 per JEDEC MO-203-AB standard. Its contrast and position are optimized for standard AOI systems used in high-volume SMT lines, supporting 100 % placement verification without additional fiducials.