Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi MMSZ2V4ET1G

Name: MMSZ2V4ET1G
Brand: onsemi
SKU: MMSZ2V4ET1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MMSZ2V4ET1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: -

Datasheet:: MMSZ2V4ET1G.pdf

Description:: DIODE ZENER 500MW 2.4V SOD123

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,758

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MMSZ2V4ET1G from onsemi is a 2.4 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 100 Ω dynamic impedance at 5 mA test current and 50 µA reverse leakage at 1.7 V, used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.

For engineers reviewing the MMSZ2V4ET1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal mapping, and automotive-grade AEC-Q101 qualification status - all confirmed from onsemi's official Rev. 8 datasheet dated February 2026.

Technical Context

This device operates as a two-terminal voltage regulator in reverse-biased mode, maintaining stable 2.4 V output across 5 mA to 20 mA Zener current range. Its 100 Ω Zener impedance at I_ZT = 5 mA and −55 °C to +150 °C junction temperature range support robust performance in thermally variable environments.

The SOD-123 package enables automated placement with 260 °C soldering tolerance for 10 seconds, while its Class 3 ESD rating (>16 kV HBM) ensures reliability during handling and assembly. Peak surge capability of 225 W (8 × 20 µs pulse) provides transient overvoltage resilience without external clamping circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage	2.4 V nominal, ±5% tolerance (2.28–2.52 V), measured at 5 mA DC current - defines precise clamping threshold for low-voltage rail regulation.
Power Dissipation	500 mW at T_L = 75 °C on FR-5 board, derated 6.7 mW/°C above 75 °C - sets maximum continuous thermal load in PCB-constrained designs.
Zener Impedance	100 Ω max at I_ZT = 5 mA, 1 kHz AC signal - determines output voltage stability under varying load current conditions.
Reverse Leakage	50 µA max at V_R = 1.7 V - ensures minimal quiescent current draw in battery-powered standby circuits.
Thermal Resistance	Junction-to-ambient R_JA = 340 °C/W - informs required PCB copper area and airflow for safe thermal management.
ESD Rating	Class 3 (>16 kV) per Human Body Model - guarantees survivability during manual handling and unshielded board-level integration.
AEC-Q101 Qualified	Validated for automotive applications - confirms reliability under temperature cycling, humidity, and mechanical stress per AEC standard.

Pinout & Package

SOD-123 surface-mount package: 2-pin, 1.60 × 2.69 × 1.16 mm, void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by polarity band; lead-free (Pb-Free) construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated voltage node; reverse-bias anode-to-cathode voltage establishes Zener conduction path.
2 (Non-banded End)	Anode	Connected to ground or lower-potential reference; completes current path during Zener breakdown operation.

Key Features

Feature	Design Value
500 mW Power Rating on FR-5 Board	Enables use in space-constrained industrial control modules without forced cooling or oversized heatsinking.
2.4 V Low-Voltage Zener Reference	Supports direct regulation of 2.5 V logic rails and biasing of precision op-amps in analog front-ends.
100 Ω Dynamic Impedance @ 5 mA	Minimizes output voltage variation under ±2 mA load transients in sensor excitation circuits.
AEC-Q101 Qualification	Permits deployment in automotive body electronics, infotainment power supervisors, and ADAS sub-modules.
Class 3 ESD Robustness	Eliminates need for external ESD protection diodes in handheld medical and portable instrumentation designs.

Applications

Industrial Sensor Signal Conditioning	Automotive Cabin Control Module
Use Scenario: Stabilizing reference voltage for 12-bit ADCs measuring thermistor or RTD outputs in PLC analog input cards. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 2.4 V bias point independent of supply ripple. Use Value: Enables <±0.5 LSB offset error over −40 °C to +85 °C ambient due to tight 5% V_Z tolerance and low TC.	Use Scenario: Overvoltage clamp on LIN bus transceiver V_CC rail exposed to load-dump transients in HVAC control units. IC Role / Device Role / Timing Role: Passive shunt protector absorbing 225 W surge energy for 20 µs without failure. Use Value: Prevents transceiver latch-up during ISO 7637-2 Pulse 5a events without adding active crowbar circuitry.
Portable Medical Glucose Meter	Smart Home Smoke Detector MCU Supply
Use Scenario: Regulating bias voltage for electrochemical sensor amplifier in battery-operated glucose monitoring devices. IC Role / Device Role / Timing Role: Low-leakage (50 µA @ 1.7 V) Zener establishing stable 2.4 V reference for analog front-end. Use Value: Extends coin-cell battery life beyond 2 years by minimizing quiescent current in always-on sensing mode.	Use Scenario: Providing clean 2.4 V supply to ultra-low-power MCU and CO sensor ASIC in battery-backed smoke alarms. IC Role / Device Role / Timing Role: Shunt regulator maintaining voltage within ±2% during alkaline battery discharge from 3.2 V to 2.0 V. Use Value: Avoids brown-out resets during long-term storage by holding MCU core voltage above 2.2 V threshold.

Industrial Sensor Signal Conditioning

Automotive Cabin Control Module

Use Scenario: Stabilizing reference voltage for 12-bit ADCs measuring thermistor or RTD outputs in PLC analog input cards.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 2.4 V bias point independent of supply ripple.

Use Value: Enables <±0.5 LSB offset error over −40 °C to +85 °C ambient due to tight 5% V_Z tolerance and low TC.

Use Scenario: Overvoltage clamp on LIN bus transceiver V_CC rail exposed to load-dump transients in HVAC control units.

IC Role / Device Role / Timing Role: Passive shunt protector absorbing 225 W surge energy for 20 µs without failure.

Use Value: Prevents transceiver latch-up during ISO 7637-2 Pulse 5a events without adding active crowbar circuitry.

Portable Medical Glucose Meter

Smart Home Smoke Detector MCU Supply

Use Scenario: Regulating bias voltage for electrochemical sensor amplifier in battery-operated glucose monitoring devices.

IC Role / Device Role / Timing Role: Low-leakage (50 µA @ 1.7 V) Zener establishing stable 2.4 V reference for analog front-end.

Use Value: Extends coin-cell battery life beyond 2 years by minimizing quiescent current in always-on sensing mode.

Use Scenario: Providing clean 2.4 V supply to ultra-low-power MCU and CO sensor ASIC in battery-backed smoke alarms.

IC Role / Device Role / Timing Role: Shunt regulator maintaining voltage within ±2% during alkaline battery discharge from 3.2 V to 2.0 V.

Use Value: Avoids brown-out resets during long-term storage by holding MCU core voltage above 2.2 V threshold.

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-C2V4	Same 2.4 V ±5% V_Z, but SOT-23 package (higher R_JA = 375 °C/W); 600 mW rating only on FR-4 with large copper pour.	Less suitable for high-density layouts where SOD-123 footprint saves >30% board area; lower ESD rating (Class 2).	Select when existing SOT-23 land pattern must be reused and thermal margin exceeds 15 °C.
MMSZ2V4T1G	Identical electrical specs and SOD-123 package, but obsolete marking format; no Pb-Free indicator "G" in part number.	No functional difference; not recommended for new designs due to lack of RoHS compliance documentation and discontinuation status.	Prefer MMSZ2V4ET1G for full traceability, Pb-Free assurance, and AEC-Q101 documentation alignment.

Compared with BZX84-C2V4 and MMSZ2V4T1G, the MMSZ2V4ET1G offers superior thermal performance in compact layouts, guaranteed Pb-Free compliance, and automotive-qualified reliability - making it optimal for new industrial and automotive designs requiring long-term supply continuity.

Availability

MMSZ2V4ET1G is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive cabin control modules, and portable medical device power supervision requiring stable component supply and documented AEC-Q101 qualification.

Supply support for MMSZ2V4ET1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MMSZxxxET1G series was designed specifically for high-reliability, space-constrained voltage regulation and transient suppression in automotive and industrial systems - emphasizing AEC-Q101 compliance, low-profile packaging, and robust surge handling.

FAQ

What is the Zener voltage tolerance and test condition for MMSZ2V4ET1G?

The MMSZ2V4ET1G has a nominal Zener voltage of 2.4 V with a ±5% tolerance, specified at I_ZT = 5 mA DC test current and pulse width ≤1 ms. This tolerance ensures predictable clamping behavior in precision analog circuits where reference stability is critical to measurement accuracy.

Is MMSZ2V4ET1G still in production or marked as discontinued?

Yes, MMSZ2V4ET1G is explicitly marked as discontinued in onsemi's February 2026 Rev. 8 datasheet. While not actively manufactured, Aetrix Electronics maintains legacy inventory with full traceability and supports design-in continuity through controlled allocation and cross-reference guidance for qualified alternatives.

What is the maximum reverse leakage current for MMSZ2V4ET1G and at what voltage is it measured?

The MMSZ2V4ET1G exhibits a maximum reverse leakage current of 50 µA at V_R = 1.7 V, measured at T_A = 25 °C. This low leakage supports extended battery life in always-on applications such as smoke detectors and wearable health monitors where standby current must remain below 100 µA.

Does MMSZ2V4ET1G meet automotive reliability standards?

Yes, MMSZ2V4ET1G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications including body control modules, lighting drivers, and infotainment power supervisors. The qualification covers temperature cycling, humidity testing, and mechanical shock per AEC requirements.

What is the thermal resistance and power derating behavior of MMSZ2V4ET1G?

MMSZ2V4ET1G has a junction-to-ambient thermal resistance (R_JA) of 340 °C/W on standard FR-5 board. Its power dissipation is rated at 500 mW up to 75 °C, then derated linearly at 6.7 mW/°C above that - meaning usable power drops to ~330 mW at 100 °C ambient, critical for sealed enclosure thermal design.

MMSZ2V4ET1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: -

Packaging:: Bulk

Product Status:: Obsolete

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

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

MMSZ2V4ET1G FAQ

1.How can I place an order for MMSZ2V4ET1G through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ2V4ET1G 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 MMSZ2V4ET1G reliable?

The price and inventory of MMSZ2V4ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ2V4ET1G is usually 5 days.

3.What payment methods are accepted for MMSZ2V4ET1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ2V4ET1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ2V4ET1G?

MMSZ2V4ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ2V4ET1G 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 MMSZ2V4ET1G?

For technical support, including MMSZ2V4ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ2V4ET1G requirements.

6.How does Aetrix verify that MMSZ2V4ET1G is sourced from the original manufacturer or authorized distributors?

All MMSZ2V4ET1G 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 MMSZ2V4ET1G meets industry standards.

7.What is the process for return or replacement of MMSZ2V4ET1G?

All MMSZ2V4ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ2V4ET1G, 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 MMSZ2V4ET1G part is unused and in its original packaging.

Return procedure for MMSZ2V4ET1G:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…