Nexperia USA Inc. MM3Z9V1T1GX

Overview

MM3Z9V1T1GX from Nexperia is a surface-mount Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation and reference applications. It provides a nominal Zener voltage of 9.1 V with ±5 % tolerance, differential resistance of 0.5 Ω at I_Z = 6 mA, and low reverse leakage (≤60 µA at V_R = 7.0 V), enabling stable biasing in power supply feedback loops and analog sensor interfaces.

For engineers reviewing the MM3Z9V1T1GX datasheet, MM3Z9V1T1GX pinout, MM3Z9V1T1GX application, or MM3Z9V1T1GX equivalent, this part supports compact, high-reliability voltage clamping and reference functions in space-constrained consumer, industrial, and automotive-qualified circuits where thermal stability and tight voltage tolerance are critical.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode–anode terminals. Its 9.1 V nominal working voltage is specified at I_Z = 6 mA, with temperature coefficient of +3.8 mV/K and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB.

The device features non-repetitive peak reverse power dissipation up to 40 W (t_p = 100 µs), total power dissipation limited to 300 mW at T_amb = 25 °C, and forward voltage ≤1.1 V at I_F = 100 mA - supporting both regulation and transient suppression roles in low-power analog subsystems.

Key Specifications

Pinout & Package

SOD323 (SC-76) plastic surface-mounted package: ultra-compact 2-pin outline with cathode marked by bar; footprint optimized for reflow/wave soldering per Nexperia's recommended land patterns (Fig. 12/13).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B9V1,115, MM3Z9V1T1GX offers slightly higher leakage but broader availability in tape-and-reel for automated SMT lines; versus 1N4739A, it delivers 70 % smaller footprint and superior thermal response on modern PCBs despite lower absolute power rating.

Availability

MM3Z9V1T1GX is available at Aetrix Electronics and suitable for power supply feedback networks, sensor bias references, overvoltage clamping circuits, and microcontroller I/O protection requiring stable component supply and full traceability.

Supply support for MM3Z9V1T1GX 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 energy-efficient solutions.

The MM3Z series targets cost-sensitive, space-constrained applications needing precision Zener regulation - designed for seamless integration into consumer, industrial, and automotive auxiliary systems where small size and stable voltage reference are essential.

FAQ

What is the maximum continuous forward current for MM3Z9V1T1GX?

The absolute maximum forward current is 200 mA per Table 5 (Limiting Values). However, sustained operation above 100 mA is discouraged due to thermal limits - at I_F = 100 mA, forward voltage is ≤1.1 V, resulting in ≥110 mW dissipation that must be managed within the 300 mW total power budget alongside reverse-bias losses.

Can MM3Z9V1T1GX replace a 9.1 V through-hole Zener in an existing design?

Yes, functionally - but mechanical redesign is required. The SOD323 footprint differs significantly from DO-41 or DO-35 packages. Thermal performance also differs: junction-to-ambient resistance is 415 K/W vs. ~200 K/W for DO-41, so derating is needed if operating near 300 mW in still air. Layout revision and solder profile validation are mandatory.

How does temperature affect the Zener voltage stability of MM3Z9V1T1GX?

At 9.1 V nominal, the temperature coefficient is +3.8 mV/K - meaning voltage increases by ~0.42 % per 10 °C rise. Over −40 °C to +125 °C, total drift is approximately ±0.65 V. For high-precision references, this must be compensated via circuit topology or paired with negative-TC components.

Is MM3Z9V1T1GX suitable for automotive applications?

While not AEC-Q200 qualified, MM3Z9V1T1GX meets key automotive environmental requirements: operating ambient range (−55 °C to +150 °C), solderability per J-STD-020, and robustness against transient surges (40 W peak). It is widely used in non-safety-critical automotive modules (e.g., infotainment power rails, body control sensor references) where customer qualification is performed.