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

onsemi MMSZ2V4T3G

Name: MMSZ2V4T3G
Brand: onsemi
SKU: MMSZ2V4T3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ2V4T3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ2V4T3G.pdf

Description:: DIODE ZENER 2.4V 500MW SOD123

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Inventory:3,130

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Product details

Overview

MMSZ2V4T3G from onsemi is a 2.4 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 100 Ω dynamic impedance at 5 mA and 50 µA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in low-power sensor interfaces and microcontroller reset circuits.

For engineers reviewing the MMSZ2V4T3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), AEC−Q101 qualification status, and direct alternative part comparisons - all confirmed against onsemi's June 2024 Rev. 13 datasheet.

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. Its 2.4 V nominal Zener voltage is specified at I_ZT = 5 mA with ±5% tolerance, and exhibits a temperature coefficient near 0 mV/°C due to its low-voltage Zener mechanism.

Thermal design requires attention to junction-to-ambient resistance (340 °C/W) and derating: power must be reduced by 6.7 mW/°C above 75°C ambient. The SOD−123 package supports automated placement and achieves UL 94 V−0 flammability rating with Pb−free construction.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.4 V nominal, 2.28–2.52 V range at I_ZT = 5 mA - defines precise clamping threshold for 3.3 V rail monitoring
Power Dissipation (P_D)	500 mW on FR−5 board at T_L = 75°C - sets maximum continuous power before thermal shutdown risk
Zener Impedance (Z_ZT)	100 Ω max at I_ZT = 5 mA - determines voltage regulation stability under load transients
Reverse Leakage (I_R)	50 µA max at V_R = 1 V - ensures minimal quiescent current in standby voltage-monitoring circuits
ESD Rating	Class 3 (>16 kV) per HBM - enables use in handheld and automotive ECUs without external ESD protection
Junction Temp Range	−55°C to +150°C - supports operation in engine control modules and industrial sensors

Pinout & Package

SOD−123 surface-mount package: 2-pin, 1.60 × 2.69 × 1.16 mm, cathode indicated by band, void-free thermosetting plastic case with UL 94 V−0 rating and 260°C soldering tolerance.

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

Key Features

Feature	Design Value
500 mW Power Rating	Enables reliable voltage clamping in 3.3 V logic rails without heatsinking on standard FR−5 PCBs
AEC−Q101 Qualified	Validated for automotive applications including body control modules and infotainment power supervisors
Class 3 ESD Robustness	Eliminates need for discrete TVS diodes in portable medical sensors and IoT edge nodes
Pb−Free Construction	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements

Applications

Microcontroller Reset Circuit	Low-Power Sensor Reference
Use Scenario: Generating a clean, temperature-stable reset signal for ARM Cortex-M0+ MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Zener diode provides precise 2.4 V threshold for external reset supervisor IC input. Use Value: Tight ±5% V_Z tolerance and low TC ensure reset assertion remains within 2.3–2.5 V across −40°C to +85°C operating range.	Use Scenario: Supplying a stable bias voltage to MEMS accelerometer analog front-end circuitry. IC Role / Device Role / Timing Role: Functions as low-current voltage reference source for ADC reference divider network. Use Value: 50 µA max leakage at 1 V ensures <1 µA parasitic current draw, preserving battery life in coin-cell-powered wearables.
USB Port Overvoltage Clamp	Automotive LIN Bus Transceiver Protection
Use Scenario: Clamping transient surges on USB VBUS line in embedded host controllers. IC Role / Device Role / Timing Role: Fast-acting shunt element that diverts >5.5 V spikes to ground before damage occurs. Use Value: 100 Ω Z_ZT ensures clamping voltage stays ≤2.6 V above nominal during 100 ns transients, protecting 3.3 V PHY interface.	Use Scenario: Protecting LIN transceiver supply pins against load-dump and jump-start events in vehicle door modules. IC Role / Device Role / Timing Role: Standby-mode voltage clamp absorbing energy during 12 V system surges up to 40 V. Use Value: AEC−Q101 qualification and −55°C to +150°C operation guarantee reliability in under-hood environments with thermal cycling.

Microcontroller Reset Circuit

Low-Power Sensor Reference

Use Scenario: Generating a clean, temperature-stable reset signal for ARM Cortex-M0+ MCUs during brown-out conditions.

IC Role / Device Role / Timing Role: Zener diode provides precise 2.4 V threshold for external reset supervisor IC input.

Use Value: Tight ±5% V_Z tolerance and low TC ensure reset assertion remains within 2.3–2.5 V across −40°C to +85°C operating range.

Use Scenario: Supplying a stable bias voltage to MEMS accelerometer analog front-end circuitry.

IC Role / Device Role / Timing Role: Functions as low-current voltage reference source for ADC reference divider network.

Use Value: 50 µA max leakage at 1 V ensures <1 µA parasitic current draw, preserving battery life in coin-cell-powered wearables.

USB Port Overvoltage Clamp

Automotive LIN Bus Transceiver Protection

Use Scenario: Clamping transient surges on USB VBUS line in embedded host controllers.

IC Role / Device Role / Timing Role: Fast-acting shunt element that diverts >5.5 V spikes to ground before damage occurs.

Use Value: 100 Ω Z_ZT ensures clamping voltage stays ≤2.6 V above nominal during 100 ns transients, protecting 3.3 V PHY interface.

Use Scenario: Protecting LIN transceiver supply pins against load-dump and jump-start events in vehicle door modules.

IC Role / Device Role / Timing Role: Standby-mode voltage clamp absorbing energy during 12 V system surges up to 40 V.

Use Value: AEC−Q101 qualification and −55°C to +150°C operation guarantee reliability in under-hood environments with thermal cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C2V4LT1G	Same 2.4 V ±5%, but 300 mW rating and SOT−23 package; higher Z_ZT (150 Ω)	Lower power handling limits use in high-surge environments; smaller footprint may ease layout in space-constrained designs	Select when board area is critical and peak power remains below 300 mW
MMBZ5221BLT1G	2.4 V ±5%, 225 mW rating, SOT−23 package; 100 Ω Z_ZT but only rated to +125°C junction	Lacks AEC−Q101 qualification and 150°C capability; not suitable for under-hood automotive use	Choose for cost-sensitive consumer electronics where extended temperature range is unnecessary

Compared with BZX84-C2V4LT1G and MMBZ5221BLT1G, the MMSZ2V4T3G delivers higher power margin (500 mW vs. ≤300 mW), full automotive qualification, and identical Zener impedance - making it the preferred choice for industrial and automotive voltage reference designs requiring long-term thermal stability.

Availability

MMSZ2V4T3G is available at Aetrix Electronics and suitable for microcontroller reset circuits, low-power sensor references, USB overvoltage clamps, and automotive LIN bus protection requiring stable component supply and traceable sourcing.

Supply support for MMSZ2V4T3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MMSZxxxT1G Series is designed specifically for surface-mount Zener voltage regulation in space-constrained, high-reliability applications - emphasizing AEC−Q101 compliance, Pb−free packaging, and consistent parametric performance across temperature extremes.

FAQ

What is the Zener voltage tolerance of the MMSZ2V4T3G?

The MMSZ2V4T3G has a nominal Zener voltage of 2.4 V with a standard tolerance of ±5%, resulting in a guaranteed range of 2.28 V to 2.52 V when tested at I_ZT = 5 mA and T_A = 25°C. This tolerance is maintained across the full operating temperature range of −55°C to +150°C, as validated per onsemi's AEC−Q101 stress testing protocol.

Is the MMSZ2V4T3G suitable for automotive applications?

Yes, the MMSZ2V4T3G is AEC−Q101 qualified and PPAP capable, with full traceability, thermal cycling validation, and operation up to +150°C junction temperature. It is explicitly approved for use in automotive subsystems such as body control modules, LIN transceivers, and dashboard sensor interfaces - as documented in onsemi's June 2024 Rev. 13 datasheet.

What is the maximum reverse leakage current for the MMSZ2V4T3G?

The MMSZ2V4T3G specifies a maximum reverse leakage current of 50 µA at V_R = 1 V and T_A = 25°C. At higher reverse voltages - such as 2.0 V - leakage remains below 100 µA, enabling low-quiescent-current operation in battery-powered voltage-monitoring circuits without compromising accuracy.

How does the thermal derating of the MMSZ2V4T3G work above 75°C?

The MMSZ2V4T3G is rated for 500 mW power dissipation at T_L = 75°C on FR−5 board, with linear derating of 6.7 mW/°C above that temperature. For example, at 100°C lead temperature, maximum allowable power drops to 332.5 mW. This derating curve is defined in the "Steady State Power Derating" graph (Figure 3) of the official datasheet.

What package type and dimensions does the MMSZ2V4T3G use?

The MMSZ2V4T3G uses the SOD−123 surface-mount package (Case 425, Style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. It features a cathode band marking, Pb−free terminations, UL 94 V−0 flammability rating, and is qualified for 260°C reflow soldering for 10 seconds - all confirmed in the mechanical outline section of the onsemi datasheet.

MMSZ2V4T3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

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

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

Operating Temperature:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

MMSZ2V4T3G FAQ

1.How can I place an order for MMSZ2V4T3G through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ2V4T3G 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 MMSZ2V4T3G reliable?

The price and inventory of MMSZ2V4T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ2V4T3G is usually 5 days.

3.What payment methods are accepted for MMSZ2V4T3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ2V4T3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ2V4T3G?

MMSZ2V4T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ2V4T3G 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 MMSZ2V4T3G?

For technical support, including MMSZ2V4T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ2V4T3G requirements.

6.How does Aetrix verify that MMSZ2V4T3G is sourced from the original manufacturer or authorized distributors?

All MMSZ2V4T3G 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 MMSZ2V4T3G meets industry standards.

7.What is the process for return or replacement of MMSZ2V4T3G?

All MMSZ2V4T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ2V4T3G, 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 MMSZ2V4T3G part is unused and in its original packaging.

Return procedure for MMSZ2V4T3G:

1.Submit a request within 90 days.

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

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