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onsemi MM5Z4703T1G
- Part No.:
- MM5Z4703T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z4703T1G.pdf
- Description:
- DIODE ZENER 16V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,645
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Product details
Overview
MM5Z4703T1G from onsemi is a 500 mW, 16 V nominal Zener voltage regulator diode in SOD−523 package, with 50 μA test current (IZT), 0.05 μA leakage current at 12.1 V reverse bias, and ±5% voltage tolerance; it provides precision voltage reference and overvoltage clamping in space-constrained portable power rails.
For engineers reviewing the MM5Z4703T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and real-world use context for low-power voltage regulation in high-density PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 16 V nominal Zener voltage is specified at IZT = 50 μA, with a typical temperature coefficient of +3.5 mV/°C in the 12–20 V range.
The device exhibits 0.05 μA maximum reverse leakage at VR = 12.1 V (80% of VZ), and thermal resistance RJA = 250 °C/W enables operation up to +150 °C junction temperature when mounted on FR−5 board with proper layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2 V (min) to 16.8 V (max) at IZT = 50 μA - defines regulated output voltage window under standard test condition |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum steady-state power handling on FR−5 board before thermal derating applies |
| Reverse Leakage (IR) | ≤ 0.05 μA @ VR = 12.1 V - ensures minimal standby current draw in voltage-reference or protection circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling in automated assembly and end-use environments without added protection |
| Package | SOD−523 (1.20 × 0.80 × 0.60 mm) - enables placement in ultra-compact layouts such as smartphone PMIC rails and wearable sensor nodes |
| Junction Temp Range | −55°C to +150°C - allows deployment in automotive cabin modules and industrial edge sensors without thermal shutdown risk |
Pinout & Package
SOD−523 surface-mount package with cathode indicated by polarity band; 2-terminal construction optimized for high-density automated placement.
| 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 rail; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT test current | 50 μA enables stable regulation in micro-power systems where supply current must remain sub-100 μA |
| Pb−Free & RoHS compliant | Meets global environmental compliance requirements without compromising solderability or reliability |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld and IoT endpoint designs |
| Thermal derating slope | 4.0 mW/°C above 75°C ambient allows accurate power budgeting in thermally constrained enclosures |
Applications
| Smartphone Power Rail Protection | Wearable Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 16 V bias rail feeding RF front-end amplifiers in LTE/5G handsets. IC Role / Device Role / Timing Role: Voltage clamp protecting sensitive analog circuitry from ESD and load-dump events. Use Value: Prevents latch-up or damage using only 1.2 × 0.8 mm footprint, with leakage <0.05 μA preserving battery life. |
Use Scenario: Providing stable 16 V reference for ADC biasing in compact health-monitoring patches. IC Role / Device Role / Timing Role: Precision voltage reference source for analog signal conditioning chain. Use Value: Delivers ±5% tolerance and <3.5 mV/°C TC across −40°C to +85°C operating range without trimming. |
| Industrial PLC Input Protection | Automotive Cabin Control Module |
Use Scenario: Overvoltage suppression on 24 V DC input stage of programmable logic controller I/O card. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting surge energy before downstream TVS and regulators. Use Value: Handles repetitive surges per Figure 4 while maintaining <0.05 μA leakage at 12.1 V to avoid false triggering. |
Use Scenario: Regulating auxiliary 16 V supply for infotainment backlight drivers in dashboard assemblies. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator stabilizing local rail under wide temperature variation. Use Value: Operates reliably from −40°C to +125°C junction temperature with no derating below 75°C board temp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C16 | Same 16 V nominal Zener, but rated at 300 mW and packaged in SOD-323 (1.7 × 1.3 mm) | Larger footprint and lower power rating limit use in ultra-thin or high-density layouts | Select when legacy SOD-323 compatibility or lower cost is prioritized over miniaturization |
| MMSZ4703T1G | Identical electrical specs and SOD-523 package, but marked as obsolete by onsemi as of 2023 | No functional difference; not recommended for new designs due to lifecycle status | MM5Z4703T1G is the active, drop-in replacement with identical marking, packaging, and qualification |
Compared with BZX584-C16 and MMSZ4703T1G, MM5Z4703T1G offers superior power density (500 mW in 1.2 × 0.8 mm), active production status, and tighter thermal management-making it optimal for next-generation portable and automotive electronics requiring long-term supply assurance.
Availability
MM5Z4703T1G is available at Aetrix Electronics and suitable for smartphone power rail protection, wearable sensor reference, and industrial PLC input protection requiring stable component supply and full traceability.
Supply support for MM5Z4703T1G 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 MM5Z4xxxTxG series was designed specifically for space-constrained voltage regulation and ESD protection in portable electronics, emphasizing low leakage, high ESD immunity, and ultra-small SOD−523 packaging.
FAQ
What is the nominal Zener voltage of MM5Z4703T1G and how tightly is it specified?
The MM5Z4703T1G has a nominal Zener voltage of 16 V, with a guaranteed range of 15.2 V (minimum) to 16.8 V (maximum) at IZT = 50 μA and TA = 25°C. This ±5% tolerance ensures predictable regulation performance across production lots without requiring post-assembly calibration, making MM5Z4703T1G suitable for fixed-voltage reference and clamping roles where tight initial accuracy is required.
Does MM5Z4703T1G meet automotive qualification standards?
MM5Z4703T1G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMM5Z4703T1G is fully AEC-Q101 qualified and PPAP capable. The MM5Z4703T1G shares identical electrical characteristics, SOD−523 package, and Pb−Free/RoHS compliance-but is intended for industrial and consumer applications where full automotive qualification is not mandated.
What is the maximum reverse leakage current for MM5Z4703T1G and at what voltage is it measured?
The maximum reverse leakage current for MM5Z4703T1G is 0.05 μA, measured at VR = 12.1 V (80% of nominal VZ). This ultra-low leakage ensures minimal quiescent current draw in battery-powered systems and prevents unintended loading of sensitive reference nodes, a key design advantage of MM5Z4703T1G in always-on sensor and IoT applications.
Can MM5Z4703T1G be used in place of older MMSZ4703 devices?
Yes-MM5Z4703T1G is the direct, active-replacement successor to MMSZ4703T1G, with identical electrical specifications, SOD−523 package dimensions, marking (4Z), and thermal performance. onsemi discontinued MMSZ4703T1G in 2023; MM5Z4703T1G maintains full pin-to-pin and functional compatibility while offering improved manufacturing consistency and extended lifecycle support.
What is the thermal resistance and derating behavior of MM5Z4703T1G on standard PCBs?
MM5Z4703T1G has a junction-to-ambient thermal resistance (RJA) of 250 °C/W when mounted on FR−5 board. Its power dissipation is rated at 500 mW up to TL = 75°C, then derated linearly at 4.0 mW/°C above that temperature. This behavior allows precise thermal modeling in compact PCBs, ensuring safe operation even in enclosed enclosures where board temperature may exceed ambient by >20°C.
MM5Z4703T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z4703T1G FAQ
1.How can I place an order for MM5Z4703T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z4703T1G 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 MM5Z4703T1G reliable?
The price and inventory of MM5Z4703T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z4703T1G is usually 5 days.
3.What payment methods are accepted for MM5Z4703T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z4703T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z4703T1G?
MM5Z4703T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z4703T1G 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 MM5Z4703T1G?
For technical support, including MM5Z4703T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z4703T1G requirements.
6.How does Aetrix verify that MM5Z4703T1G is sourced from the original manufacturer or authorized distributors?
All MM5Z4703T1G 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 MM5Z4703T1G meets industry standards.
7.What is the process for return or replacement of MM5Z4703T1G?
All MM5Z4703T1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z4703T1G, 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 MM5Z4703T1G part is unused and in its original packaging.
Return procedure for MM5Z4703T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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