Nexperia USA Inc. MM3Z47VT1GX

Overview

MM3Z47VT1GX from Nexperia is a 47 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, designed for precision voltage regulation and reference functions in low-power analog circuits.

For engineers reviewing the MM3Z47VT1GX datasheet, MM3Z47VT1GX pinout, MM3Z47VT1GX application, or MM3Z47VT1GX equivalent, this device serves as a stable shunt regulator with 32.9 Ω differential resistance at I_Z = 2 mA, low temperature coefficient of +42.0 to +51.8 mV/K, and 40 pF capacitance at 1 MHz - critical for noise-sensitive feedback loops and voltage clamping.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal working voltage of 47 V (44.0–50.0 V range), specified at I_Z = 2 mA per Table 9. Its thermal resistance from junction to ambient is 415 K/W on FR4 PCB, and junction-to-solder-point is 110 K/W, enabling reliable operation up to 150 °C junction temperature.

The device exhibits low dynamic impedance (32.9 Ω), tight voltage tolerance (±5 %), and controlled temperature coefficient (+42.0 to +51.8 mV/K), making it suitable for stable voltage references where thermal drift must be minimized without active compensation.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package: 2-terminal, ultra-compact footprint (2.7 × 1.35 mm), cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B47,115, MM3Z47VT1GX trades 2 % tolerance and 25 Ω r_diff for lower cost and identical SOD323 fit; versus 1N4752A, it sacrifices 700 mW headroom for 70 % board space reduction and reflow compatibility.

Availability

MM3Z47VT1GX is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, high-voltage analog front-ends, and LED driver biasing requiring stable component supply with full traceability and no obsolescence risk.

Supply support for MM3Z47VT1GX 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 technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The MM3Z series targets general-purpose voltage regulation in space-constrained applications, emphasizing small-footprint reliability, tight tolerances, and robust surge immunity for cost-sensitive high-volume designs.

FAQ

What is the maximum continuous reverse current the MM3Z47VT1GX can sustain without exceeding its 300 mW power limit?

At 47 V nominal Zener voltage, the absolute maximum continuous reverse current is 6.38 mA (300 mW ÷ 47 V). However, the datasheet specifies test conditions at I_Z = 2 mA for parameter characterization, and derating is required above 25 °C ambient per the 415 K/W thermal resistance - actual usable current drops to ~4.5 mA at 70 °C ambient.

How does the temperature coefficient of +42.0 to +51.8 mV/K affect regulation accuracy over −55 °C to +150 °C ambient range?

Across the full ambient range, the Zener voltage shifts by approximately 10.5–13.0 V (calculated as ΔT × coefficient, where ΔT = 205 K). This is inherent to 47 V Zeners and reflects positive TC behavior; system-level compensation (e.g., series thermistor networks) is required only if sub-1 % total voltage stability is mandated over temperature.

Can MM3Z47VT1GX replace a 5.1 V Zener in the same SOD323 footprint?

No - while physically compatible, the electrical characteristics differ fundamentally: 5.1 V Zeners (e.g., MM3Z5V1T1GX) have negative temperature coefficients (−2.7 mV/K) and much lower dynamic impedance (~2 Ω), whereas MM3Z47VT1GX has positive TC and 32.9 Ω r_diff. Interchange would cause catastrophic regulation failure due to mismatched voltage, TC sign, and impedance.

Is the 40 W non-repetitive peak reverse power rating applicable to repetitive 100 µs pulses at 1 kHz?

No - the 40 W rating applies strictly to non-repetitive events (single pulse, t_p = 100 µs, square wave). For repetitive pulses, average power must stay within 300 mW, limiting duty cycle to ≤ 0.75 % at 1 kHz (since 40 W × 0.0001 s = 4 mJ per pulse; 300 mW × 0.001 s = 0.3 mJ per period → max 7.5% duty cycle yields 3 mJ, so 0.75% is safe margin).