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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. SZMM3Z2V4T1GX

Name: SZMM3Z2V4T1GX
Brand: Nexperia USA Inc.
SKU: SZMM3Z2V4T1GX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMM3Z2V4T1GX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: SZMM3Z2V4T1GX.pdf

Description:: DIODE ZENER 2.4V 300MW SOD323

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Product details

Overview

SZMM3Z2V4T1GX from Nexperia is a general-purpose Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation at 2.4 V nominal working voltage with ±5 % tolerance, 50 Ω typical differential resistance at I_Z = 5 mA, and AEC-Q101 qualification for automotive use in power rail clamping and reference circuits.

For engineers reviewing the SZMM3Z2V4T1GX datasheet, SZMM3Z2V4T1GX pinout, SZMM3Z2V4T1GX application, or SZMM3Z2V4T1GX equivalent, this page delivers verified electrical characteristics, thermal behavior, junction-to-ambient resistance, reverse current limits at 2.4 V, and cathode/anode terminal mapping per official Nexperia documentation.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 2.4 V across its terminals under regulated current conditions (I_Z = 5 mA), with a temperature coefficient of −3.5 mV/K and maximum reverse current of 1000 µA at V_R = 2.7 V. Its low forward voltage (1.1 V at I_F = 100 mA) supports bidirectional protection roles.

Designed for surface-mount implementation on FR4 PCBs, it exhibits R_th(j-a) = 415 K/W in free air and R_th(j-sp) = 110 K/W to cathode solder point, enabling reliable thermal management in space-constrained automotive and industrial modules where ambient temperatures range from −55 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.4 V (min 2.30 V, max 2.60 V at I_Z = 5 mA) - defines precise clamping threshold for 2.5 V logic rails
Differential Resistance	50 Ω (max) at I_Z = 5 mA - ensures minimal voltage shift under load variation in feedback paths
Reverse Current	1000 µA max at V_R = 2.7 V - confirms sharp knee and low leakage before breakdown onset
Total Power Dissipation	300 mW at T_amb = 25 °C - sets continuous DC regulation limit on standard FR4 PCB
Non-repetitive Peak Power	40 W (t_p = 100 µs square wave) - supports transient overvoltage suppression in ESD-coupled lines
Temperature Coefficient	−3.5 mV/K - enables predictable drift compensation in temperature-sensitive references
Junction Temperature Limit	150 °C - allows operation in under-hood automotive environments without derating

Pinout & Package

Package: SOD323 (SC-76), 2-lead surface-mount plastic package with cathode marked by bar on top surface; dimensions 1.8 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement
2	Anode (A)	Connected to ground or lower-potential rail; forms reverse-biased junction for Zener conduction

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing
Low differential resistance	50 Ω max ensures <12 mV output shift across ±1 mA load change - critical for stable biasing
Wide operating temperature range	−55 °C to +150 °C ambient enables deployment in engine control units and ADAS sensor modules
Small-footprint SOD323 package	1.8 mm × 1.35 mm footprint saves >60 % board area vs. DO-35 through-hole equivalents
Tight voltage tolerance	±5 % at 2.4 V allows direct replacement of legacy 2.4 V Zeners without circuit recalibration

Applications

Automotive Body Control Module (BCM)

Industrial Sensor Signal Conditioning

Use Scenario: Regulating 2.4 V reference for microcontroller ADC inputs monitoring battery voltage and door lock status.

IC Role / Device Role / Timing Role: Zener diode provides stable shunt reference independent of supply ripple or load transients.

Use Value: Maintains ±0.12 V accuracy over −40 °C to +125 °C, ensuring consistent ADC code mapping across vehicle lifetime.

Use Scenario: Clamping analog sensor output (e.g., pressure transducer) to prevent overvoltage damage to downstream op-amps.

IC Role / Device Role / Timing Role: Acts as fast-acting reverse-bias clamp limiting signal swing to 2.4 V + V_F.

Use Value: Withstands 40 W surge pulses while holding clamped voltage within 5 % of nominal, protecting precision amplifiers.

Consumer USB-C Power Delivery Monitor

Medical Portable Diagnostic Device

Use Scenario: Providing 2.4 V bias for USB PD communication ICs requiring tight voltage margin compliance.

IC Role / Device Role / Timing Role: Functions as low-noise voltage reference in CC line monitoring circuitry.

Use Value: Low 100 pF capacitance at 0 V avoids signal integrity degradation on high-speed CC bus lines.

Use Scenario: Stabilizing reference voltage for low-power biosensor front-end in battery-operated glucose meters.

IC Role / Device Role / Timing Role: Delivers stable 2.4 V shunt reference with <1 µA leakage at 2.0 V reverse bias.

Use Value: Enables >10-year shelf life via ultra-low standby current draw while maintaining calibration traceability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B2V4,115 (Nexperia)	Same 2.4 V nominal, ±5 % tolerance, but SOD323 package with 200 mW P_tot rating vs. 300 mW	Limited to lower-power biasing due to 33 % lower continuous dissipation	Select when board-level thermal budget restricts average power to ≤200 mW
MMBZ5221BS-7-F (Diodes Inc.)	2.4 V nominal, ±5 %, SOT-23 package, 350 mW P_tot, but not AEC-Q101 qualified	Not approved for automotive use; higher thermal resistance (R_th(j-a) ≈ 450 K/W)	Choose only for non-automotive industrial or consumer designs requiring higher power margin

Compared with BZX384-B2V4,115, SZMM3Z2V4T1GX offers 50 % higher continuous power handling; versus MMBZ5221BS-7-F, it provides automotive qualification and lower thermal resistance despite identical voltage rating - making it the sole choice for AEC-compliant 2.4 V regulation.

Availability

SZMM3Z2V4T1GX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical devices, and USB-C power monitoring systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.

Supply support for SZMM3Z2V4T1GX 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

SZMM3Z series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh-environment automotive and industrial control systems.

FAQ

What is the maximum continuous reverse current this Zener can sustain at 2.4 V?

The SZMM3Z2V4T1GX sustains up to 5 mA DC reverse current at its nominal 2.4 V Zener voltage, with total power dissipation limited to 300 mW at 25 °C ambient. At higher currents, thermal derating applies per R_th(j-a) = 415 K/W, requiring PCB layout adjustments to maintain junction temperature below 150 °C.

How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?

At −3.5 mV/K, the Zener voltage shifts −0.84 V over a 240 K range (−55 °C to +185 °C), but actual operating range is capped at T_j ≤ 150 °C. From −40 °C to +125 °C, the shift is −0.58 V - meaning regulation stays within ±0.29 V of 2.4 V, or ±12 %, unless compensated externally.

Can this device be used for ESD protection in addition to voltage regulation?

No - while it handles 40 W non-repetitive surges (100 µs), its 2.4 V breakdown is too low for IEC 61000-4-2 ESD protection, which requires ≥8 kV contact discharge. It functions as a clamping regulator, not an ESD suppressor; dedicated TVS diodes like PESD5V0S1BA should be used for ESD compliance.

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

Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 12 supports peak temperatures up to 260 °C for ≤30 seconds, with recommended solder paste stencil aperture of 0.5 mm × 0.6 mm per pad and 1.5 mm transport direction alignment.

SZMM3Z2V4T1GX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 2.4 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

SZMM3Z2V4T1GX FAQ

1.How can I place an order for SZMM3Z2V4T1GX through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMM3Z2V4T1GX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SZMM3Z2V4T1GX reliable?

The price and inventory of SZMM3Z2V4T1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z2V4T1GX is usually 5 days.

3.What payment methods are accepted for SZMM3Z2V4T1GX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z2V4T1GX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMM3Z2V4T1GX?

SZMM3Z2V4T1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMM3Z2V4T1GX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SZMM3Z2V4T1GX?

For technical support, including SZMM3Z2V4T1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z2V4T1GX requirements.

6.How does Aetrix verify that SZMM3Z2V4T1GX is sourced from the original manufacturer or authorized distributors?

All SZMM3Z2V4T1GX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SZMM3Z2V4T1GX meets industry standards.

7.What is the process for return or replacement of SZMM3Z2V4T1GX?

All SZMM3Z2V4T1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z2V4T1GX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SZMM3Z2V4T1GX part is unused and in its original packaging.

Return procedure for SZMM3Z2V4T1GX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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