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

onsemi SZMMSZ5244ET1G

Name: SZMMSZ5244ET1G
Brand: onsemi
SKU: SZMMSZ5244ET1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMMSZ5244ET1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: SZMMSZ5244ET1G.pdf

Description:: DIODE ZENER 14V 500MW SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:2,850

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Product details

Overview

SZMMSZ5244ET1G from onsemi is a 14 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 600 Ω maximum dynamic impedance at 9.0 mA test current and 0.1 µA reverse leakage at 10 V, used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the SZMMSZ5244ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, junction-to-lead thermal resistance (150 °C/W), ESD robustness (Class 3, >16 kV HBM), and automotive qualification per AEC-Q101.

Technical Context

This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its cathode-anode terminals under controlled Zener current. It exhibits a nominal temperature coefficient near +5.5 mV/°C for the 14 V variant, with leakage tightly specified at 0.1 µA @ VR = 10 V and dynamic impedance measured at 1 kHz AC signal superimposed on DC bias.

The SOD-123 package enables automated placement while limiting junction-to-ambient thermal resistance to 340 °C/W; power derating begins above 75 °C at 6.7 mW/°C, and peak surge capability reaches 225 W for 8 × 20 µs pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	13.3–14.7 V at I_ZT = 9.0 mA; ensures ±5% regulation accuracy over production lot and temperature
Power Dissipation (P_D)	500 mW @ T_L = 75 °C on FR-5 board; defines maximum continuous DC power handling before thermal shutdown risk
Zener Impedance (Z_ZT)	≤600 Ω @ I_ZT = 9.0 mA, 1 kHz; determines output voltage stability under varying load current
Reverse Leakage (I_R)	≤0.1 µA @ V_R = 10 V; critical for low-current bias networks and high-impedance sensing nodes
Thermal Resistance (R_JL)	150 °C/W junction-to-lead; enables accurate PCB trace thermal design for lead-soldered mounting
ESD Rating	Class 3 (>16 kV) per Human Body Model; supports handling without external protection in assembly lines
AEC-Q101 Qualified	Validated for automotive underhood applications requiring extended temperature cycling and reliability screening

Pinout & Package

SOD-123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm body, void-free thermosetting plastic case, UL 94 V-0 flammability rating, cathode indicated by band, polarity confirmed per marking diagram (Pin 1 = Cathode, Pin 2 = Anode).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Banded End)	Cathode	Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs
Pin 2	Anode	Connected to circuit ground or lower potential reference; completes current path during regulation

Key Features

Feature	Design Value
Automotive-grade qualification	AEC-Q101 qualified with PPAP capability, enabling use in engine control modules and ADAS power rails
High-density packaging	SOD-123 footprint allows >2× board area savings vs. DO-35, supporting miniaturized power management
Controlled thermal performance	Specified R_JL = 150 °C/W enables predictable junction temperature rise under known lead copper mass
Robust transient immunity	225 W nonrepetitive surge rating (8 × 20 µs) protects against EFT and inductive switching spikes
Pb-free and RoHS-compliant	Meets global environmental compliance requirements without compromising solderability or reliability

Applications

Industrial Sensor Signal Conditioning	Automotive Body Control Module (BCM)
Use Scenario: Providing stable 14 V reference for op-amp-based bridge sensor amplifiers in pressure transducers. IC Role / Device Role / Timing Role: Voltage reference element establishing precise bias point for analog front-end gain stages. Use Value: Tight ±5% V_Z tolerance and low 0.1 µA leakage ensure <0.5% full-scale error contribution at 10 µA bias currents.	Use Scenario: Regulating supply to microcontroller reset circuitry in 12 V vehicle battery systems. IC Role / Device Role / Timing Role: Standby-mode voltage clamp preventing false resets during cold-crank transients. Use Value: 225 W surge rating absorbs 12 V battery line spikes up to ISO 7637-2 Pulse 1/2a without failure.
Medical Portable Diagnostic Device	IoT Edge Node Power Management
Use Scenario: Generating clean 14 V rail for analog-to-digital converter reference in handheld ultrasound units. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing ADC reference voltage independent of main SMPS ripple. Use Value: 600 Ω Z_ZT limits reference voltage shift to <6 mV under 10 µA load variation, preserving ENOB.	Use Scenario: Clamping LDO input voltage in battery-powered LoRaWAN sensor nodes operating down to 2.5 V. IC Role / Device Role / Timing Role: Overvoltage protector for ultra-low-quiescent LDOs during USB charging events. Use Value: Class 3 ESD rating eliminates need for external TVS, reducing BOM count and PCB area in space-constrained designs.

Industrial Sensor Signal Conditioning

Automotive Body Control Module (BCM)

Use Scenario: Providing stable 14 V reference for op-amp-based bridge sensor amplifiers in pressure transducers.

IC Role / Device Role / Timing Role: Voltage reference element establishing precise bias point for analog front-end gain stages.

Use Value: Tight ±5% V_Z tolerance and low 0.1 µA leakage ensure <0.5% full-scale error contribution at 10 µA bias currents.

Use Scenario: Regulating supply to microcontroller reset circuitry in 12 V vehicle battery systems.

IC Role / Device Role / Timing Role: Standby-mode voltage clamp preventing false resets during cold-crank transients.

Use Value: 225 W surge rating absorbs 12 V battery line spikes up to ISO 7637-2 Pulse 1/2a without failure.

Medical Portable Diagnostic Device

IoT Edge Node Power Management

Use Scenario: Generating clean 14 V rail for analog-to-digital converter reference in handheld ultrasound units.

IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing ADC reference voltage independent of main SMPS ripple.

Use Value: 600 Ω Z_ZT limits reference voltage shift to <6 mV under 10 µA load variation, preserving ENOB.

Use Scenario: Clamping LDO input voltage in battery-powered LoRaWAN sensor nodes operating down to 2.5 V.

IC Role / Device Role / Timing Role: Overvoltage protector for ultra-low-quiescent LDOs during USB charging events.

Use Value: Class 3 ESD rating eliminates need for external TVS, reducing BOM count and PCB area in space-constrained designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ5244ET1G	No SZ prefix; commercial grade only, not AEC-Q101 qualified; identical electrical specs and SOD-123 package	Not suitable for automotive underhood environments requiring PPAP documentation or extended temperature validation	Select when cost sensitivity outweighs automotive qualification needs and ambient temperature stays ≤125 °C
BZX84-C15LT1G	15 V nominal (±5%), 350 mW rating, higher Z_ZT = 30 Ω typical but 100 Ω max; SOT-23 package	Higher power density but larger thermal resistance; requires different footprint and layout revision	Choose for higher current regulation where 15 V matches system margin, accepting reduced surge capability and no AEC-Q101 support

Compared with MMSZ5244ET1G and BZX84-C15LT1G, SZMMSZ5244ET1G uniquely combines automotive qualification, 500 mW power handling, and 14 V regulation in SOD-123 - making it optimal for safety-critical 12 V system rails where both reliability and thermal headroom matter.

Availability

SZMMSZ5244ET1G is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, medical diagnostic devices, and IoT edge node power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SZMMSZ5244ET1G 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

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

SZMMSZ52xxET1G belongs to onsemi's automotive-qualified Zener regulator family, designed specifically for voltage reference and overvoltage protection in harsh-environment 12 V systems where AEC-Q101 compliance and thermal robustness are mandatory.

FAQ

What is the Zener voltage tolerance for SZMMSZ5244ET1G?

The SZMMSZ5244ET1G has a nominal Zener voltage of 14 V with a standard tolerance of ±5%, meaning the actual measured V_Z falls between 13.3 V and 14.7 V at I_ZT = 9.0 mA and T_L = 30 °C. This tolerance is guaranteed across production lots and applies to all units shipped as SZMMSZ5244ET1G.

Is SZMMSZ5244ET1G suitable for automotive applications?

Yes, SZMMSZ5244ET1G is AEC-Q101 qualified and PPAP capable, with testing performed for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Its SZ prefix denotes automotive-specific site and process controls, making it appropriate for underhood and cabin modules where reliability under thermal stress is required.

What is the maximum reverse leakage current for SZMMSZ5244ET1G?

The maximum reverse leakage current for SZMMSZ5244ET1G is 0.1 µA at V_R = 10 V and T_A = 25 °C. This value is verified per the datasheet's Electrical Characteristics table and reflects worst-case leakage under specified test conditions - critical for low-power bias networks and high-impedance reference designs using SZMMSZ5244ET1G.

Can SZMMSZ5244ET1G replace MMSZ5244ET1G in existing designs?

SZMMSZ5244ET1G shares identical electrical specifications, SOD-123 package dimensions, and pinout with MMSZ5244ET1G, but adds AEC-Q101 qualification and automotive process controls. No PCB changes are needed for drop-in replacement; however, design validation should confirm that the enhanced reliability features of SZMMSZ5244ET1G meet the target application's safety or quality requirements.

What is the thermal resistance from junction to lead for SZMMSZ5244ET1G?

The thermal resistance from junction to lead (R_JL) for SZMMSZ5244ET1G is 150 °C/W, measured via infrared scan method. This parameter enables accurate prediction of junction temperature rise when mounted on PCB traces with known copper mass and thermal path - essential for thermal design validation of SZMMSZ5244ET1G in high-reliability applications.

SZMMSZ5244ET1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: SZMMSZ52xxxT1G

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 14 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 10 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -55°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

SZMMSZ5244ET1G FAQ

1.How can I place an order for SZMMSZ5244ET1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMMSZ5244ET1G 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 SZMMSZ5244ET1G reliable?

The price and inventory of SZMMSZ5244ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5244ET1G is usually 5 days.

3.What payment methods are accepted for SZMMSZ5244ET1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5244ET1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMMSZ5244ET1G?

SZMMSZ5244ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMMSZ5244ET1G 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 SZMMSZ5244ET1G?

For technical support, including SZMMSZ5244ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5244ET1G requirements.

6.How does Aetrix verify that SZMMSZ5244ET1G is sourced from the original manufacturer or authorized distributors?

All SZMMSZ5244ET1G 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 SZMMSZ5244ET1G meets industry standards.

7.What is the process for return or replacement of SZMMSZ5244ET1G?

All SZMMSZ5244ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5244ET1G, 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 SZMMSZ5244ET1G part is unused and in its original packaging.

Return procedure for SZMMSZ5244ET1G:

1.Submit a request within 90 days.

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

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