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onsemi MMSZ2V4ET1
- Part No.:
- MMSZ2V4ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ2V4ET1.pdf
- Description:
- DIODE ZENER 2.4V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,784
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Product details
Overview
MMSZ2V4ET1 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 MMSZ2V4ET1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.4 V nominal Zener voltage tolerance, thermal resistance of 340 °C/W, AEC-Q101 qualification status, ESD robustness (>16 kV HBM), and discontinuation notice requiring supply-chain risk assessment.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown at precisely controlled Zener voltage (2.28–2.52 V) under 5 mA test current. Its junction-to-ambient thermal resistance (340 °C/W) and derating slope (6.7 mW/°C above 75 °C) define thermal management constraints in compact PCB layouts.
The SOD-123 package supports automated placement and reflow soldering per JEDEC standards, with cathode polarity marked by a band and maximum solder temperature of 260 °C for 10 seconds. It delivers Class 3 ESD immunity (>16 kV HBM) and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.28–2.52 V at IZT = 5 mA; ensures stable 2.4 V reference within ±5% tolerance for low-voltage biasing. |
| Power Dissipation (PD) | 500 mW at TL = 75 °C; defines maximum continuous power handling before thermal derating begins. |
| Zener Impedance (ZZT) | 100 Ω max at IZT = 5 mA; limits voltage variation under load changes in regulation circuits. |
| Reverse Leakage (IR) | 50 µA max at VR = 1.7 V; determines quiescent current loss in high-impedance sensing nodes. |
| Thermal Resistance (RJA) | 340 °C/W; indicates required board copper area and airflow for safe operation at full power. |
| ESD Rating | Class 3 (>16 kV HBM); enables use in handheld and automotive ECUs without external protection. |
| Junction Temp Range | −55 to +150 °C; supports deployment in under-hood automotive and industrial ambient environments. |
Pinout & Package
SOD-123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in higher-current reference paths than standard 250 mW Zeners without forced cooling. |
| AEC-Q101 Qualified | Validated for automotive electronics applications including body control modules and sensor signal conditioning. |
| ESD Robustness >16 kV HBM | Eliminates need for external TVS diodes in ESD-prone consumer and industrial interface circuits. |
| Pb-Free SOD-123 Package | Complies with RoHS and J-STD-020 reflow profiles, supporting lead-free manufacturing without reliability penalty. |
| Small Outline (1.6 × 2.69 mm) | Fits high-density layouts in space-constrained wearables and IoT edge nodes. |
Applications
| Automotive Cabin Sensors | Industrial Temperature Transmitters |
|---|---|
Use Scenario: Providing stable 2.4 V reference for RTD or thermistor bridge excitation in HVAC control units. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing precise bias point for analog front-end amplifiers. Use Value: ±5% Zener tolerance and low 100 Ω impedance maintain <0.5% reference drift across −40 to +125 °C ambient. |
Use Scenario: Clamping and regulating supply to 4–20 mA transmitter ICs in hazardous-area field devices. IC Role / Device Role / Timing Role: Overvoltage protector and local reference source for loop-powered analog signal chains. Use Value: 500 mW rating absorbs transient surges up to 225 W (8×20 µs), preventing downstream IC latch-up. |
| Medical Wearable Biosensors | Smart Home Motion Detectors |
Use Scenario: Biasing photodiode amplifiers in pulse oximetry modules powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage (50 µA @ 1.7 V) voltage clamp enabling nanoamp-level signal integrity. Use Value: Ultra-low reverse current preserves battery life while maintaining 2.4 V reference stability over 5-year shelf life. |
Use Scenario: Regulating voltage for PIR sensor signal conditioning ASICs in battery-operated occupancy sensors. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing 2.4 V rail for comparator hysteresis and oscillator timing. Use Value: SOD-123 footprint allows integration into 3.2 × 3.2 mm PCBs while meeting AEC-Q101 reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V4 | 2.4 V ±5%, 300 mW rating, SOT-23 package, 150 Ω ZZT at 5 mA | Lower power handling and higher impedance limit use in higher-current references | Select when board space permits SOT-23 and thermal budget is ≤300 mW |
| MMBZ5221BS | 2.4 V ±5%, 200 mW rating, SOT-23 package, 100 Ω ZZT at 20 mA | Rated at higher test current but lower total power; less suitable for sustained 5 mA operation | Prefer for cost-sensitive consumer designs where 200 mW derating suffices |
Compared with MMSZ2V4ET1, BZX84-C2V4 offers smaller footprint but reduced power margin and higher impedance, while MMBZ5221BS trades off power rating for identical impedance at higher test current-making MMSZ2V4ET1 optimal for thermally constrained 500 mW analog references.
Availability
MMSZ2V4ET1 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial temperature transmitters, medical wearable biosensors, and smart home motion detectors requiring stable component supply despite its discontinued status.
Supply support for MMSZ2V4ET1 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, and IoT applications with focus on reliability and sustainability.
The MMSZxxxET1G series was designed for high-volume, space-constrained voltage regulation and protection in automotive and industrial systems requiring AEC-Q101 compliance and Pb-free manufacturability.
FAQ
Is MMSZ2V4ET1 still in active production?
No, MMSZ2V4ET1 is officially discontinued per onsemi's February 2026 datasheet revision. Aetrix Electronics maintains limited legacy stock with full traceability and provides lifecycle coordination support to help customers transition to qualified alternatives or manage end-of-life inventory.
What is the exact Zener voltage tolerance for MMSZ2V4ET1?
The MMSZ2V4ET1 has a nominal Zener voltage of 2.4 V with a guaranteed tolerance of ±5%, meaning its measured VZ falls between 2.28 V and 2.52 V when tested at IZT = 5 mA and TA = 25 °C, as specified in the Electrical Characteristics table on page 3 of the datasheet.
Can MMSZ2V4ET1 replace MMSZ2V7ET1G in a circuit?
No-MMSZ2V4ET1 and MMSZ2V7ET1G have different nominal Zener voltages (2.4 V vs. 2.7 V) and distinct voltage ranges (2.28–2.52 V vs. 2.57–2.84 V). Substituting MMSZ2V4ET1 would shift reference or clamp levels by 0.3 V, potentially violating system accuracy or protection thresholds.
What does the "ET1" suffix mean in MMSZ2V4ET1?
The "ET1" suffix in MMSZ2V4ET1 denotes the SOD-123 package variant with tape-and-reel packaging (3,000 units per reel) and Pb-free construction. It distinguishes this version from older through-hole or non-Pb-free variants and aligns with onsemi's standardized ordering nomenclature for surface-mount Zener diodes.
Does MMSZ2V4ET1 meet automotive qualification standards?
Yes, MMSZ2V4ET1 is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications such as cabin sensors and body electronics. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-validated per the manufacturer's certification documentation.
MMSZ2V4ET1 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
MMSZ2V4ET1 FAQ
1.How can I place an order for MMSZ2V4ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ2V4ET1 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 MMSZ2V4ET1 reliable?
The price and inventory of MMSZ2V4ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ2V4ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ2V4ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ2V4ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ2V4ET1?
MMSZ2V4ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ2V4ET1 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 MMSZ2V4ET1?
For technical support, including MMSZ2V4ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ2V4ET1 requirements.
6.How does Aetrix verify that MMSZ2V4ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ2V4ET1 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 MMSZ2V4ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ2V4ET1?
All MMSZ2V4ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ2V4ET1, 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 MMSZ2V4ET1 part is unused and in its original packaging.
Return procedure for MMSZ2V4ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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