Nexperia USA Inc. SZMM5Z2V7T5GF

Overview

SZMM5Z2V7T5GF from Nexperia is a 2.7 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 20 Ω typical differential resistance at I_Z = 5 mA and −3.5 to 0 mV/K temperature coefficient - used for precision voltage reference and overvoltage clamping in automotive sensor signal conditioning circuits.

For engineers reviewing the SZMM5Z2V7T5GF datasheet, SZMM5Z2V7T5GF pinout, SZMM5Z2V7T5GF application, or SZMM5Z2V7T5GF equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_th(j-sp) = 65 K/W), AEC-Q101 qualification, low capacitance (440 pF at 1 MHz), and cathode-marked SOD523 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable 2.7 V regulation across load and line variations, with tight ±2 % initial tolerance and low dynamic impedance enabling accurate voltage referencing in low-power analog front-ends. Its AEC-Q101 qualification confirms suitability for automotive ambient temperature ranges (−55 °C to +150 °C) and transient surge resilience.

The device exhibits a negative temperature coefficient (−3.5 to 0 mV/K) optimized for 2.7 V operation, ensuring predictable drift behavior under thermal stress. With R_th(j-a) = 350 K/W (free air) and R_th(j-sp) = 65 K/W (solder point), thermal performance supports reliable operation on FR4 PCBs with ≥35 mm² copper area at the cathode tab.

Key Specifications

Pinout & Package

Package: SOD523 (SC-79), ultra-small surface-mount plastic package with 2 leads, 1.25 mm × 0.85 mm body, 0.65 mm height, cathode indicated by marking bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C2V7 and MMSZ4677T1G, SZMM5Z2V7T5GF delivers superior precision (±2 %), smallest footprint (SOD523), lowest thermal resistance to solder point (65 K/W), and automotive qualification - making it optimal for space-constrained, thermally demanding, and safety-critical applications.

Availability

SZMM5Z2V7T5GF is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial sensor interfaces, wearable battery monitoring, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance and rapid prototyping support.

Supply support for SZMM5Z2V7T5GF 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, reliable components for automotive, industrial, and consumer applications, with leadership in logic, discrete, and MOSFET technologies.

SZMM5Z series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment automotive and industrial systems.

FAQ

What is the maximum continuous reverse current this Zener can handle at 2.7 V regulation?

The SZMM5Z2V7T5GF is not rated for continuous reverse current at its Zener voltage - instead, it is characterized by Zener test current I_Z = 5 mA (typical operating point) and maximum total power dissipation of 300 mW. At 2.7 V, this corresponds to ~111 mA absolute maximum continuous reverse current, but practical design limits I_Z to ≤50 mA to maintain regulation accuracy and thermal safety on standard FR4 PCBs.

Does the cathode marking bar align with Pin 1 in IPC-7351 standard footprints?

Yes - the cathode marking bar on SZMM5Z2V7T5GF corresponds directly to Pin 1 (cathode) in the IPC-7351-compliant SOD523 footprint. The device outline drawing (Figure 9) and reflow soldering land pattern (Figure 10) confirm that the bar aligns with the left-side pad when viewed with the marking bar facing upward and the device oriented per standard top-side silkscreen convention.

How does the −3.5 to 0 mV/K temperature coefficient affect long-term voltage stability?

This temperature coefficient means the Zener voltage decreases by up to 3.5 mV per °C rise in junction temperature - resulting in a maximum drift of ~350 mV over a 100 °C range (e.g., −40 °C to +60 °C ambient). However, in real-world automotive applications with controlled thermal design, actual drift remains within ±15 mV due to self-heating limitation and PCB copper thermal mass, preserving reference integrity for 12-bit measurement systems.

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

No - parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages and thermal runaway risk. Even with matched units, slight V_Z differences cause one device to conduct most current, exceeding its P_tot rating. For higher power needs, select a single higher-rated Zener (e.g., SOD123 or SMA package) or implement active regulation with a transistor-based shunt.