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onsemi MMSZ4702
- Part No.:
- MMSZ4702
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4702.pdf
- Description:
- DIODE ZENER 15V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:68,992
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Product details
Overview
MMSZ4702 from ON Semiconductor is a 15 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 50 µA test current, with ±5% nominal voltage tolerance (14.25–15.75 V), 150 mV delta Zener voltage, and Class 3 HBM ESD rating (>16 kV). It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.
For engineers reviewing the MMSZ4702 datasheet, pinout, applications, or equivalent options, key selection considerations include its 15 V nominal Zener voltage at 50 µA, 500 mW power dissipation on FR-4 board, 150 mV ∆VZ across 10–100 µA, 50 nA reverse leakage at 11.4 V, and SOD-123 footprint compatibility with mini-MELF layouts.
Technical Context
The MMSZ4702 operates as a two-terminal voltage-regulating diode optimized for stable DC reference generation and transient suppression in space-constrained PCBs. Its thermal resistance junction-to-ambient is 340 °C/W, and junction temperature range spans −55 to +150 °C - enabling use in industrial ambient environments without forced cooling.
Designed for surface-mount assembly, it features a cathode/anode pinout in the SOD-123 package (package code D6), with lead solder tolerance up to 260 °C for 10 seconds. Forward voltage is specified at 900 mV @ 10 mA, supporting bidirectional circuit verification during functional test.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15.0 V at 50 µA - defines primary regulation point for biasing or clamping |
| Zener Voltage Range | 14.25–15.75 V - ensures ±5% tolerance compliance under production test conditions |
| Power Dissipation | 500 mW at 25°C - supports continuous operation on standard FR-4 PCBs without heatsinking |
| Delta Zener Voltage | 150 mV - quantifies voltage variation between 10 µA and 100 µA, critical for low-current stability |
| Reverse Leakage | 50 nA @ 11.4 V - guarantees minimal parasitic current in high-impedance sensing nodes |
| ESD Rating | >16 kV HBM Class 3 - enables robust handling and assembly in uncontrolled environments |
| Forward Voltage | 900 mV @ 10 mA - allows functional polarity check and forward-bias validation in production test |
Pinout & Package
SOD-123 plastic surface-mount package (package code D6), 2-terminal device with cathode marked by top-side "DM" marking. Dimensions: 1.40–1.80 mm length (A), 2.55–2.85 mm width (B), 0.88–1.18 mm height (C); land pad pitch = 0.91 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked) | Cathode | Connected to regulated output node or voltage reference rail; polarity-sensitive for correct Zener conduction |
| 2 | Anode | Connected to ground or lower-potential node; completes reverse-biased path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Mini-MELF footprint compatibility | Enables drop-in replacement for legacy glass Zeners without PCB redesign |
| 500 mW FR-4 power rating | Supports higher current regulation than typical 200–300 mW SOD-323 Zeners |
| Class 3 HBM ESD protection | Eliminates need for external ESD protection in handheld or field-deployable designs |
| Low ∆VZ (150 mV) | Ensures stable reference voltage across wide operating current range (10–100 µA) |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Zener voltage reference providing 15 V bias to sensor Wheatstone bridge. Use Value: Tight 14.25–15.75 V tolerance and low ∆VZ ensure <±0.5% full-scale output drift over temperature and supply variation. | Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting shunt protector against >15 V surges. Use Value: 500 mW rating and 150 mV ∆VZ enable reliable clamping without thermal runaway during repeated 100 ns pulses. |
| Programmable Logic Controller I/O Protection | Low-Power IoT Node Voltage Reference |
Use Scenario: Protecting 24 V digital input channels from field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Zener clamp placed between input terminal and internal logic rail. Use Value: SOD-123 package withstands reflow and mechanical stress; 16 kV HBM rating prevents ESD damage during field servicing. | Use Scenario: Generating stable 15 V reference for ADC calibration in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-current Zener reference supplying precision bandgap circuitry. Use Value: 50 nA leakage at 11.4 V minimizes quiescent current draw, extending 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C15 | 15 V, 300 mW, SOD-523 package, ±5% tolerance, 100 nA IR @ 11.4 V | Lower power rating and smaller footprint limit use in higher-current clamping | Select when board area is constrained and 300 mW suffices |
| MM3Z15VT1G | 15 V, 200 mW, SOD-323 package, ±5% tolerance, 100 nA IR @ 11.4 V | Reduced power handling and higher thermal resistance restrict use in sustained regulation | Select for cost-sensitive consumer designs where 200 mW meets requirement |
Compared with BZX584C15 and MM3Z15VT1G, the MMSZ4702 delivers 67% higher power capability and lower ∆VZ in the same mini-MELF-compatible footprint - making it preferred for industrial signal conditioning and robust transient suppression where thermal margin and voltage stability are critical.
Availability
MMSZ4702 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ4702 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 (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and cloud infrastructure markets.
The MMSZ4702 belongs to ON Semiconductor's general-purpose Zener diode product line, engineered for reliable voltage regulation and transient suppression in cost-sensitive, high-volume surface-mount applications.
FAQ
What is the nominal Zener voltage and test current for MMSZ4702?
The MMSZ4702 has a nominal Zener voltage of 15.0 V measured at a test current of 50 µA. Its guaranteed voltage range is 14.25 V to 15.75 V under those conditions, reflecting ±5% tolerance. This specification is verified per the official ON Semiconductor datasheet and applies directly to the MMSZ4702 part number in SOD-123 packaging.
Does MMSZ4702 have a defined forward voltage specification?
Yes, the MMSZ4702 specifies a forward voltage of 900 mV at 10 mA forward current. This parameter enables functional testing of diode polarity and conduction behavior during incoming inspection or board-level test. The forward voltage value is explicitly listed in the Electrical Characteristics table of the MMSZ4702 datasheet and applies to the exact MMSZ4702 device.
What is the maximum power dissipation rating for MMSZ4702 on standard PCB material?
The MMSZ4702 is rated for 500 mW total power dissipation at 25°C when mounted on FR-4 or FR-5 board. Power derating is 6.7 mW/°C above 25°C, resulting in zero dissipation at approximately 100°C ambient. This rating is confirmed in the Absolute Maximum Ratings table for the MMSZ4702 and reflects real-world thermal performance on common PCB substrates.
How does the MMSZ4702 compare to mini-MELF glass Zeners in layout compatibility?
The MMSZ4702 uses the SOD-123 package, which shares identical land pattern dimensions with the glass mini-MELF (LL-34) package. This allows direct PCB footprint reuse without modification - a key design advantage documented in the MMSZ4702 General Description section. The MMSZ4702 thus offers improved manufacturability and moisture resistance over glass-bodied alternatives while maintaining layout compatibility.
What ESD protection level does MMSZ4702 meet, and how is it tested?
The MMSZ4702 meets Class 3 Human Body Model (HBM) ESD rating with >16 kV tolerance. This is verified per ANSI/ESDA/JEDEC JS-001 and is explicitly stated in the Features section of the MMSZ4702 datasheet. The rating applies to the packaged MMSZ4702 device and supports robust handling during automated assembly and field service without additional protection circuitry.
MMSZ4702 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4702 FAQ
1.How can I place an order for MMSZ4702 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4702 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 MMSZ4702 reliable?
The price and inventory of MMSZ4702 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4702 is usually 5 days.
3.What payment methods are accepted for MMSZ4702?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4702 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4702?
MMSZ4702 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4702 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 MMSZ4702?
For technical support, including MMSZ4702 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4702 requirements.
6.How does Aetrix verify that MMSZ4702 is sourced from the original manufacturer or authorized distributors?
All MMSZ4702 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 MMSZ4702 meets industry standards.
7.What is the process for return or replacement of MMSZ4702?
All MMSZ4702 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4702, 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 MMSZ4702 part is unused and in its original packaging.
Return procedure for MMSZ4702:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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