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onsemi MMSZ4701ET1
- Part No.:
- MMSZ4701ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4701ET1.pdf
- Description:
- DIODE ZENER 14V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,366
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Product details
Overview
MMSZ4701ET1 from ON Semiconductor is a 14 V nominal Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C on FR−5 board, with 10.6 V reverse voltage rating at 0.05 µA leakage and ±3% voltage tolerance. It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, DC-DC feedback loops, and ESD-protected sensor interfaces.
For engineers reviewing the MMSZ4701ET1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 14 V nominal Zener voltage, 50 mA test current, 150 °C maximum junction temperature, Class 3 (＞16 kV) HBM ESD rating, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias regulation under controlled current conditions. Its thermal resistance of 150 °C/W (junction-to-lead) enables reliable operation in high-density PCB layouts with minimal heatsinking.
The MMSZ4701ET1 exhibits a positive temperature coefficient above ~5 V, with typical TC near +5.5 mV/°C at 14 V, and dynamic impedance of 30 Ω at IZT = 50 mA - critical for maintaining regulation accuracy across load and temperature variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3–14.7 V @ IZT = 50 mA - defines tight regulation window for 14 V reference designs |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports continuous operation in compact industrial modules |
| Leakage Current (IR) | ≤0.05 µA @ VR = 10.6 V - ensures minimal standby current in battery-powered systems |
| Dynamic Impedance (ZZT) | 30 Ω @ IZT = 50 mA - maintains voltage stability against fast transient load changes |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust protection without external TVS in space-constrained nodes |
| Junction Temp Range | −55°C to +150°C - validated for under-hood automotive and industrial control environments |
Pinout & Package
SOD−123 plastic surface-mount package (Case 425, Style 1), void-free thermosetting epoxy case with corrosion-resistant finish; cathode indicated by band; Pb−Free compliant; 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive electronics including body control modules and sensor signal conditioning |
| 500 mW Power Rating | Enables use in higher-current reference applications without derating below 75°C ambient |
| Small SOD−123 Footprint | Reduces PCB area by >60% vs. DO-35; supports ≥0.5 mm trace spacing in high-density layouts |
| 16 kV HBM ESD Robustness | Eliminates need for discrete ESD protection in I/O lines handling 12–15 V logic or sensor signals |
Applications
| Automotive Sensor Reference | Industrial Analog Input Protection |
|---|---|
Use Scenario: Providing stable 14 V reference for Hall-effect position sensors in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp for analog front-end circuitry. Use Value: Maintains sensor linearity across −40°C to +125°C ambient while surviving load-dump transients up to 225 W peak. |
Use Scenario: Protecting 12-bit ADC inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-leakage shunt regulator limiting input voltage to 14.7 V maximum. Use Value: Prevents ADC saturation and latch-up with ≤0.05 µA leakage at 10.6 V, preserving measurement accuracy. |
| Low-Power IoT Voltage Clamp | DC-DC Feedback Reference |
Use Scenario: Clamping supply rails in battery-powered wireless sensor nodes operating from Li-ion or 2-cell alkaline sources. IC Role / Device Role / Timing Role: Standby-mode voltage limiter preventing LDO or MCU damage during battery overcharge events. Use Value: Draws only 0.05 µA at 10.6 V, extending shelf life and enabling multi-year operation on coin cells. |
Use Scenario: Setting output voltage in isolated flyback converters for industrial power supplies. IC Role / Device Role / Timing Role: Primary-side feedback reference for optocoupler-coupled regulation loop. Use Value: Delivers 14 V ±3% tolerance with 30 Ω dynamic impedance, ensuring <±1% output variation across line/load/temperature. |
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-C15 | 15 V nominal, SOT-23 package, 350 mW rating, no AEC-Q101 qualification | Higher leakage (1 µA @ 12 V), unsuitable for automotive or ultra-low-power designs | Select when cost sensitivity outweighs automotive compliance and leakage requirements |
| MMSZ4701ET1G | Pb-free version of same die; identical electrical specs; RoHS-compliant plating and packaging | No functional difference; required for new designs targeting lead-free manufacturing | Prefer for all new production; MMSZ4701ET1 is legacy non-RoHS variant |
Compared with BZX84-C15 and MMSZ4701ET1G, the MMSZ4701ET1 offers automotive-grade reliability and ultra-low leakage but requires leaded assembly processes; MMSZ4701ET1G matches it electrically while meeting modern environmental standards.
Availability
MMSZ4701ET1 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial analog input protection, and DC-DC feedback reference applications requiring stable component supply with long-term lifecycle support.
Supply support for MMSZ4701ET1 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ4xxxET1 series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding environments - emphasizing AEC-Q101 compliance, low leakage, and robust surge handling.
FAQ
What is the nominal Zener voltage of MMSZ4701ET1 and its tolerance?
The MMSZ4701ET1 has a nominal Zener voltage of 14.0 V with a tolerance of ±3%, specified as 13.3 V minimum to 14.7 V maximum at IZT = 50 mA and TA = 25°C. This tight tolerance ensures predictable regulation in precision reference circuits where voltage drift must remain within strict limits across production lots.
Is MMSZ4701ET1 qualified for automotive applications?
Yes, the MMSZ4701ET1 is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as engine control unit sensor references and body electronics. Its −55°C to +150°C junction temperature range and 16 kV HBM ESD rating meet stringent automotive reliability requirements without requiring additional qualification testing.
What is the maximum power dissipation for MMSZ4701ET1 and at what condition?
The MMSZ4701ET1 is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) = 75°C, derating linearly at 6.7 mW/°C above that temperature. This rating reflects real-world PCB thermal performance, not just junction-to-ambient values, enabling accurate thermal design in compact assemblies.
How does the leakage current of MMSZ4701ET1 compare to similar 14 V Zeners?
The MMSZ4701ET1 specifies leakage current ≤0.05 µA at VR = 10.6 V, significantly lower than alternatives like BZX84-C15 (1 µA at 12 V). This ultra-low leakage preserves battery life in always-on IoT nodes and prevents signal degradation in high-impedance analog paths where even nanoamp-level currents affect accuracy.
What is the package type and marking code for MMSZ4701ET1?
The MMSZ4701ET1 uses the SOD−123 surface-mount package (Case 425, Style 1) with cathode indicated by a band. Its device marking is "CJ2", visible on the top surface of the package. This marking aligns with ON Semiconductor's standardized coding system for the MMSZ4xxxET1G family and enables quick visual identification on assembled PCBs.
MMSZ4701ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.6 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
MMSZ4701ET1 FAQ
1.How can I place an order for MMSZ4701ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4701ET1 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 MMSZ4701ET1 reliable?
The price and inventory of MMSZ4701ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4701ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ4701ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4701ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4701ET1?
MMSZ4701ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4701ET1 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 MMSZ4701ET1?
For technical support, including MMSZ4701ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4701ET1 requirements.
6.How does Aetrix verify that MMSZ4701ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4701ET1 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 MMSZ4701ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ4701ET1?
All MMSZ4701ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4701ET1, 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 MMSZ4701ET1 part is unused and in its original packaging.
Return procedure for MMSZ4701ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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