Nexperia USA Inc. MM3Z56VT1GX

Overview

MM3Z56VT1GX from Nexperia is a 56 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 39.2 Ω differential resistance at I_Z = 2 mA and temperature coefficient of +52.5 mV/K - used for precision voltage reference and overvoltage clamping in low-power analog signal conditioning circuits.

For engineers reviewing the MM3Z56VT1GX datasheet, MM3Z56VT1GX pinout, MM3Z56VT1GX application, or MM3Z56VT1GX equivalent, this page delivers verified electrical characteristics, thermal behavior, cathode/anode terminal mapping, and real-world use cases in voltage regulation, ESD protection, and biasing networks where stable 56 V reference under 2 mA test current is required.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal working voltage of 56 V, specified at I_Z = 2 mA per Table 9. Its positive temperature coefficient (+52.5 mV/K) indicates increasing breakdown voltage with junction temperature - critical for thermal drift compensation in reference designs.

The device exhibits 39.2 Ω differential resistance at 2 mA, enabling tight regulation under small-signal load variations, and supports up to 200 mA forward current while maintaining ≤1.1 V forward voltage at 100 mA - suitable for bidirectional transient suppression and dual-mode biasing.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package: 2-terminal, 1.35 mm × 0.85 mm body, 0.45 mm lead pitch, 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-B56 and 1N4748A, MM3Z56VT1GX offers optimal balance of SMD miniaturization, 300 mW power handling, and predictable positive thermal drift - making it preferred for space-constrained industrial control and RF bias networks where thermal modeling is prioritized over absolute drift minimization.

Availability

MM3Z56VT1GX is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C port protection, PLC input stages, and RF bias networks requiring stable component supply with guaranteed long-term continuity.

Supply support for MM3Z56VT1GX 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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The MM3Z series targets cost-sensitive, space-constrained applications requiring reliable voltage regulation and transient suppression in SOD323 footprint - designed specifically for high-yield automated assembly and robust performance in harsh ambient environments.

FAQ

What is the maximum continuous reverse current the MM3Z56VT1GX can sustain without exceeding its 300 mW power limit?

At 56 V nominal Zener voltage, the maximum continuous reverse current is 5.36 mA (300 mW ÷ 56 V), assuming no ambient temperature derating. The datasheet specifies 200 mA forward current capability, but reverse operation is thermally limited to ~5.4 mA at 25 °C ambient on standard FR4 PCB - higher currents require thermal relief or forced cooling.

How does the +52.5 mV/K temperature coefficient affect circuit accuracy over −40 °C to +125 °C?

Over that 165 °C range, the Zener voltage shifts by +8.66 V (52.5 mV/K × 165 K), resulting in a 56 V device varying from ~52.3 V to ~60.9 V. This 15.4 % span must be accommodated in tolerance budgets - e.g., using it in temperature-compensated references where opposing coefficients cancel drift.

Can MM3Z56VT1GX be used in series or parallel configurations for higher voltage or current handling?

Series connection is viable for higher voltage references (e.g., two 56 V devices yield ~112 V), but mismatched temperature coefficients cause unequal voltage sharing. Parallel use is not recommended due to negative resistance effects and thermal runaway risk - discrete current-sharing resistors would be required, negating size advantages.

Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?

Yes - Nexperia's recommended reflow profile for SOD323 specifies peak temperature of 260 °C for ≤10 seconds, matching IPC-J-STD-020 Class 3 requirements. The package outline (Fig. 11) and solder land pattern (Fig. 12) are optimized for Type 3 solder paste and 0.5 mm stencil apertures, ensuring >99.5 % first-pass yield in high-volume SMT lines.