Nexperia USA Inc. SZMM5Z3V3T5GF

Overview

SZMM5Z3V3T5GF from Nexperia is a 3.3 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 5.0 Ω typical differential resistance at I_Z = 5 mA and AEC-Q101 qualification for automotive voltage regulation.

For engineers reviewing the SZMM5Z3V3T5GF datasheet, SZMM5Z3V3T5GF pinout, SZMM5Z3V3T5GF application, or SZMM5Z3V3T5GF equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_th(j-sp) = 65 K/W), surge capability (t_p = 100 µs), cathode-marked polarity, and low capacitance (410 pF at f = 1 MHz).

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 3.3 V reference under varying load and temperature conditions. Its low 5.0 Ω differential resistance ensures minimal voltage deviation across 1–5 mA Zener current range, while the −3.5 to 0 mV/K temperature coefficient minimizes drift over −55 °C to +150 °C ambient.

The device uses planar epitaxial construction in an ultra-small SOD523 package with cathode-indicating marking bar. It supports both steady-state regulation and transient surge suppression via its 40 W non-repetitive peak reverse power rating under square-wave pulse conditions (t_p = 100 µs, δ ≤ 0.02).

Key Specifications

Pinout & Package

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 indicated by marking bar on top surface.

Key Features

Applications

Availability

SZMM5Z3V3T5GF is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC input stages, USB-C PD monitor circuits, and portable medical sensor systems requiring stable component supply with AEC-Q101 assurance and rapid lead-time fulfillment.

Supply support for SZMM5Z3V3T5GF 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 discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.

The SZMM5Z series targets space-constrained voltage regulation and transient protection in automotive and industrial applications, emphasizing ultra-small SOD523 packaging, tight Zener tolerances, and AEC-Q101 compliance.

FAQ

What is the maximum continuous Zener current for SZMM5Z3V3T5GF at 25 °C ambient?

The maximum continuous Zener current is derived from P_tot = 300 mW and V_Z ≈ 3.3 V, yielding I_Z(max) ≈ 91 mA. However, derating applies above 25 °C ambient due to R_th(j-a) = 350 K/W; at 85 °C ambient, usable current drops to ~55 mA to maintain T_j ≤ 150 °C.

How does the cathode marking align with the SOD523 package outline?

The cathode is marked by a visible bar on the top surface of the SOD523 package, aligned with Pin 1 per Figure 9 in the datasheet. When viewed from above with the marking bar at the left, Pin 1 (cathode) is the left lead and Pin 2 (anode) is the right lead - matching the standard SC-79 pinning convention.

Can SZMM5Z3V3T5GF replace BZX584-C3V3 in existing designs?

Yes, with verification: both are 3.3 V Zeners in SOD523, but SZMM5Z3V3T5GF offers tighter ±2 % tolerance (vs. ±5 % for BZX584-C3V3), lower r_diff (5.0 Ω vs. 90 Ω), and AEC-Q101 qualification. Layout remains identical, but system-level surge testing should confirm compatibility with the higher 40 W P_ZSM rating.

What is the recommended reflow profile for SZMM5Z3V3T5GF?

Use JEDEC J-STD-020-compliant lead-free reflow: peak temperature 260 °C for ≤ 30 seconds, ramp-up rate ≤ 3 °C/s, ramp-down rate ≤ 6 °C/s, and time above 217 °C limited to 60–150 seconds. Footprint dimensions match Figure 10 (solder land: 0.5 mm × 1.4 mm, solder paste area: 0.4 mm × 2.15 mm).