Nexperia USA Inc. MM3Z27VT1GX

Overview

MM3Z27VT1GX from Nexperia is a 27 V ±5 % tolerance Zener diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 50 Ω typical differential resistance at I_Z = 2 mA and 25.1–28.9 V working voltage range - used for precision voltage reference and overvoltage clamping in low-power analog signal conditioning circuits.

For engineers reviewing the MM3Z27VT1GX datasheet, MM3Z27VT1GX pinout, MM3Z27VT1GX application, or MM3Z27VT1GX equivalent, this page delivers verified electrical characteristics, thermal resistance (R_th(j-a) = 415 K/W), cathode/anode terminal mapping, and real-world use cases in voltage regulation, ESD protection interface stages, and feedback loop references.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal 27 V regulation voltage at I_Z = 2 mA, exhibiting low temperature coefficient (±0.05 mV/K) and stable reverse current (≤300 µA at V_R = 22 V). Its SOD323 footprint enables high-density PCB layout while maintaining thermal performance under pulsed surge conditions (t_p = 100 µs).

The device features 0.9 V forward voltage at I_F = 10 mA and 1.1 V at I_F = 100 mA, with junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - enabling reliable operation up to 150 °C junction temperature and −55 °C to +150 °C ambient range.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package with 2 leads; marking bar indicates cathode; 2.7 mm × 1.6 mm footprint; 0.45 mm height; optimized for reflow and wave soldering per Figures 12–13.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B27,115, MM3Z27VT1GX offers identical electrical behavior in SOD323; versus 1N4748A, it trades higher surge margin and thermal efficiency for compact size and lower leakage, making it optimal for modern SMT analog subsystems.

Availability

MM3Z27VT1GX is available at Aetrix Electronics and suitable for voltage reference design, ESD protection circuitry, and low-power sensor biasing requiring stable component supply across production volumes and prototyping cycles.

Supply support for MM3Z27VT1GX 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The MM3Z series targets cost-sensitive, space-constrained applications demanding stable Zener regulation in consumer, industrial, and computing systems - emphasizing small-footprint reliability and consistent parametric performance.

FAQ

What is the maximum continuous reverse current for stable 27 V regulation?

The MM3Z27VT1GX achieves stable Zener regulation at I_Z = 2 mA, with maximum recommended continuous reverse current limited to 10 mA to maintain junction temperature below 150 °C on standard FR4 PCB. At 10 mA, power dissipation reaches 270 mW - within the 300 mW P_tot rating but approaching thermal limits without heatsinking.

Can MM3Z27VT1GX be used in bidirectional TVS configurations?

No - MM3Z27VT1GX is a unidirectional Zener diode optimized for reverse-bias regulation. It lacks symmetric breakdown characteristics and specified clamping parameters for positive-going transients. For bidirectional protection, use purpose-built TVS diodes such as PESD5V0S1BA.

How does its thermal resistance affect derating above 25 °C ambient?

With R_th(j-a) = 415 K/W, each 1 °C rise in ambient temperature reduces allowable power dissipation by 0.72 mW. At 85 °C ambient, maximum continuous P_tot derates to ~170 mW - requiring design review if operating near 300 mW at room temperature.

Is the 27 V Zener voltage guaranteed across the full temperature range?

Yes - the 25.1–28.9 V range applies at T_j = 25 °C. Over −55 °C to +150 °C, V_Z shifts by ±0.05 mV/K, resulting in a worst-case span of approximately 24.7–29.3 V - still within ±5 % of nominal 27 V across the full operating range.