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

Nexperia USA Inc. SZMM3Z24VT1GX

Name: SZMM3Z24VT1GX
Brand: Nexperia USA Inc.
SKU: SZMM3Z24VT1GX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMM3Z24VT1GX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: SZMM3Z24VT1GX.pdf

Description:: DIODE ZENER 24V 300MW SOD323

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Product details

Overview

SZMM3Z24VT1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, rated for 24 V nominal Zener voltage (22.93–25.57 V), 300 mW total power dissipation, and ±5 % tolerance. It delivers low differential resistance (≤19 Ω at I_Z = 5 mA), AEC-Q101 qualification, and stable regulation in automotive power rail clamping and reference circuits.

For engineers reviewing the SZMM3Z24VT1GX datasheet, SZMM3Z24VT1GX pinout, SZMM3Z24VT1GX application, or SZMM3Z24VT1GX equivalent, this page provides verified electrical characteristics, thermal behavior, junction-to-ambient resistance (415 K/W), cathode/anode terminal mapping, and automotive-grade reliability context - all confirmed from Nexperia's Rev. 5 product data sheet dated 16 January 2025.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable 24 V reference under regulated current conditions (I_Z = 5 mA). Its temperature coefficient is +18.4 to +22.0 mV/K, enabling predictable drift compensation in precision bias networks.

Designed for surface-mount use on FR4 PCBs with single-sided copper, it supports non-repetitive surge handling up to 40 W (t_p = 100 µs), while sustaining continuous operation at T_j ≤ 150 °C and ambient temperatures from −55 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	22.93–25.57 V at I_Z = 5 mA - defines regulation window for 24 V rail stabilization
Differential Resistance r_diff	≤19 Ω - ensures minimal output voltage shift under load current variation
Total Power Dissipation P_tot	300 mW at T_amb = 25 °C - sets maximum steady-state thermal load on PCB layout
Forward Voltage V_F	1.1 V at I_F = 100 mA - relevant for polarity-checking and ESD protection path design
Junction-to-Ambient R_th(j-a)	415 K/W - determines required copper area and airflow for thermal management
Reverse Current I_R	≤120 µA at V_R = 18.8 V - quantifies leakage before breakdown onset
AEC-Q101 Qualified	Yes - validated for automotive electronics per stress test standard for discrete semiconductors

Pinout & Package

Package: SOD323 (SC-76), surface-mount plastic package with 2 leads; dimensions 1.8 × 1.35 × 0.95 mm (L × W × H); marking bar denotes cathode.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; accepts reverse-bias current during Zener conduction
2	Anode (A)	Connected to ground or lower-potential reference; completes reverse-bias path

Key Features

Feature	Design Value
Low differential resistance	≤19 Ω at I_Z = 5 mA - improves regulation accuracy under dynamic load changes
AEC-Q101 qualification	Qualified for automotive applications - enables use in engine control units and ADAS power domains
Small footprint	SOD323 (SC-76) - saves board space in compact modules like battery management IC support rails
Wide voltage range series	2.4 V to 75 V selection - allows standardized procurement across multiple voltage rails
Non-repetitive surge rating	40 W peak (100 µs square wave) - protects downstream circuitry from transient overvoltage events

Applications

Automotive Power Rail Clamping

Industrial Sensor Reference Supply

Use Scenario: Suppressing load-dump transients on 24 V vehicle subsystems (e.g., body control modules).

IC Role / Device Role / Timing Role: Zener clamp placed between supply rail and ground to shunt excess energy during ISO 7637-2 pulse 5a events.

Use Value: Withstands 40 W non-repetitive surges and maintains <25.57 V clamping threshold, protecting 28 V-rated CAN transceivers and microcontrollers.

Use Scenario: Providing stable 24 V reference for analog front-end amplifiers in industrial pressure sensors.

IC Role / Device Role / Timing Role: Precision voltage reference element in feedback loop of isolated DC-DC converter secondary side.

Use Value: ±5 % tolerance and low r_diff ensure <±0.5 V output deviation across 0–10 mA load range, improving ADC measurement linearity.

LED Driver Overvoltage Protection

Embedded System Reset Circuit

Use Scenario: Safeguarding constant-current LED drivers against input overvoltage in outdoor signage systems.

IC Role / Device Role / Timing Role: Shunt regulator connected across driver input capacitor to clamp voltage spikes above 24 V.

Use Value: Fast response (<100 ns) and 415 K/W R_th(j-a) allow reliable thermal recovery after repeated 200 V/10 µs transients.

Use Scenario: Generating clean reset signal for ARM Cortex-M MCUs during brown-out conditions.

IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC delay network into MCU reset pin.

Use Value: Predictable +18.4 to +22.0 mV/K temperature coefficient enables accurate reset voltage calibration across −40 °C to +105 °C operating range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B24,115	Same 24 V nominal Zener, SOD323 package, but ±5 % tolerance and 300 mW rating; r_diff = 20 Ω (vs. ≤19 Ω)	Identical automotive qualification (AEC-Q110 not claimed; only AEC-Q101 for SZMM3Z24VT1GX)	Select when legacy BOM compatibility is prioritized over marginally tighter regulation stability
MMSZ5248B-TP	24 V Zener, SOD-123 package (larger), 500 mW rating, ±5 % tolerance; r_diff = 35 Ω	Higher power handling but larger footprint and no AEC-Q101 certification	Choose for non-automotive industrial designs requiring higher continuous dissipation and relaxed thermal constraints

Compared with BZX384-B24,115 and MMSZ5248B-TP, SZMM3Z24VT1GX offers the tightest differential resistance (≤19 Ω), smallest SOD323 footprint, and explicit AEC-Q101 qualification - making it optimal for space-constrained, thermally sensitive automotive voltage clamping where regulation precision and qualification traceability are mandatory.

Availability

SZMM3Z24VT1GX is available at Aetrix Electronics and suitable for automotive power rail clamping, industrial sensor reference supplies, LED driver overvoltage protection, and embedded system reset circuits requiring stable component supply, AEC-Q101 compliance, and high-volume manufacturability.

Supply support for SZMM3Z24VT1GX 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

SZMM3Z24VT1GX belongs to the SZMM3Z series of general-purpose Zener diodes engineered for compact, high-reliability voltage regulation in automotive and industrial environments - emphasizing AEC-Q101 qualification, low r_diff, and SOD323 scalability.

FAQ

What is the maximum continuous reverse current this Zener can handle at 24 V?

The device is rated for a maximum forward current of 200 mA, but its Zener operation is defined by test current I_Z. At 24 V, the recommended Zener test current is 5 mA (per Table 8), with absolute maximum reverse power limited to 300 mW at 25 °C ambient. Continuous operation above this requires derating based on R_th(j-a) = 415 K/W and ambient temperature.

Is the cathode marked on the physical package?

Yes - the cathode (pin 1) is identified by a visible marking bar on the top surface of the SOD323 package, consistent with Nexperia's standard marking convention for Zener diodes in this series, as shown in Figure 11 of the datasheet.

Does this part support reflow soldering, and what profile is recommended?

Yes - the SOD323 package is qualified for lead-free reflow soldering. Nexperia specifies a footprint with 0.5 mm pad width and 0.6 mm solder paste stencil openings (Figure 12), and recommends peak temperatures ≤260 °C per JEDEC J-STD-020, with time above liquidus ≤60 seconds.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

At 24 V nominal, the temperature coefficient ranges from +18.4 to +22.0 mV/K (Table 8). Over a 165 °C span, this produces a total drift of approximately +3.0 to +3.6 V - meaning regulation shifts from ~22.9 V at −40 °C to ~26.5 V at +125 °C, requiring system-level compensation if sub-1 % accuracy is needed.

SZMM3Z24VT1GX 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):: 24 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 19 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

SZMM3Z24VT1GX FAQ

1.How can I place an order for SZMM3Z24VT1GX through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMM3Z24VT1GX 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 SZMM3Z24VT1GX reliable?

The price and inventory of SZMM3Z24VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z24VT1GX is usually 5 days.

3.What payment methods are accepted for SZMM3Z24VT1GX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z24VT1GX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMM3Z24VT1GX?

SZMM3Z24VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMM3Z24VT1GX 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 SZMM3Z24VT1GX?

For technical support, including SZMM3Z24VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z24VT1GX requirements.

6.How does Aetrix verify that SZMM3Z24VT1GX is sourced from the original manufacturer or authorized distributors?

All SZMM3Z24VT1GX 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 SZMM3Z24VT1GX meets industry standards.

7.What is the process for return or replacement of SZMM3Z24VT1GX?

All SZMM3Z24VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z24VT1GX, 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 SZMM3Z24VT1GX part is unused and in its original packaging.

Return procedure for SZMM3Z24VT1GX:

1.Submit a request within 90 days.

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

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