Nexperia USA Inc. MM5Z9V1T5GF

Overview

MM5Z9V1T5GF from Nexperia is a Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision low-power voltage reference and clamping in space-constrained circuits. It delivers a nominal 9.1 V Zener voltage at 5 mA with ±2 % tolerance, 0.5 Ω differential resistance, and 7.0 mV/K temperature coefficient - enabling stable regulation in portable power management and signal conditioning applications.

For engineers reviewing the MM5Z9V1T5GF datasheet, MM5Z9V1T5GF pinout, MM5Z9V1T5GF application, or MM5Z9V1T5GF equivalent, this device is selected for compact voltage stabilization where thermal stability, low leakage (<10 µA at 7.0 V), and fast transient response under ≤40 W surge conditions are critical design requirements.

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 Zener voltage is specified at I_Z = 5 mA, with a tight ±2 % tolerance and low 0.5 Ω dynamic resistance ensuring minimal voltage deviation under load variation.

Thermal performance is characterized by a 3.8 mV/K temperature coefficient at I_Z = 5 mA and junction-to-ambient thermal resistance of 350 K/W on FR4 PCB (35 mm² copper). It supports non-repetitive 40 W surge pulses (t_p = 100 µs, square wave) while maintaining continuous operation at ≤300 mW total power dissipation.

Key Specifications

Pinout & Package

SOD523 (SC-79) ultra-small surface-mount plastic package with 2 leads, 1.25 mm × 0.85 mm footprint, 0.65 mm height, and cathode band marking on terminal 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C9V1 and MMSZ5240B, MM5Z9V1T5GF uniquely balances ±2 % precision, 40 W surge capability, and ultra-compact SOD523 packaging - making it optimal for space-limited, high-accuracy, and ESD-resilient designs where both regulation stability and physical integration are critical.

Availability

MM5Z9V1T5GF is available at Aetrix Electronics and suitable for portable power monitoring, ADC reference stabilization, USB interface clamping, and microcontroller reset circuits requiring stable component supply with guaranteed long-term continuity.

Supply support for MM5Z9V1T5GF 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.

MM5Z9V1T5GF belongs to the MM5Z series of general-purpose Zener diodes engineered for ultra-compact voltage regulation and clamping in space-constrained, low-power electronic systems.

FAQ

What is the maximum continuous reverse current this Zener can handle at 25 °C?

The MM5Z9V1T5GF is rated for a maximum continuous forward current of 200 mA, but its Zener operation relies on controlled reverse current. At 25 °C ambient, the device sustains up to 33 mA reverse current continuously (calculated from P_tot = 300 mW ÷ V_Z ≈ 33 mA), assuming no additional thermal derating beyond the datasheet's 300 mW limit on FR4 with 35 mm² copper.

How does the 3.8 mV/K temperature coefficient affect accuracy over −40 °C to +85 °C?

With a +3.8 mV/K coefficient and nominal V_Z = 9.1 V, the voltage shift across a 125 °C range is approximately +475 mV. This results in a worst-case deviation of ±2.6 % from nominal at temperature extremes - a predictable, linear drift that can be compensated in firmware or analog circuitry when high-precision references are required.

Can this Zener be used in parallel for higher power dissipation?

No - Zener diodes exhibit manufacturing variations in V_Z and r_diff, causing uneven current sharing. Parallel connection risks thermal runaway in the unit with lowest V_Z. For higher power, use a single higher-rated device (e.g., MMSZ5240B) or add external ballast resistors, though this degrades regulation accuracy and is not recommended per Nexperia's application guidance.

Is the SOD523 package compatible with standard reflow profiles for lead-free soldering?

Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD523 outline (Fig. 9) and recommended solder land pattern (Fig. 10) support peak temperatures up to 260 °C for ≤30 seconds, with preheat ramp rates ≤3 °C/s and cooling rates ≥1 °C/s, matching standard Class 3 lead-free assembly requirements.