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onsemi MM5Z4686T1G
- Part No.:
- MM5Z4686T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z4686T1G.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,200
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Product details
Overview
MM5Z4686T1G from onsemi is a 3.9 V nominal Zener voltage regulator diode in SOD−523 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 5 µA reverse leakage at 2 V (IR), and ±5% Zener voltage tolerance. It provides precision low-voltage regulation in space-constrained portable electronics.
For engineers reviewing the MM5Z4686T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.9 V Zener voltage, 50 µA IZT, 5 µA IR @ 2 V, SOD−523 footprint compatibility, and Class 3 ESD rating (>16 kV HBM).
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable output voltage across variable load currents via controlled reverse breakdown. Its thermal resistance (RJA = 250 °C/W) and derating slope (4.0 mW/°C above 75°C) define safe operating limits on FR−5 board.
Zener voltage is specified at IZT = 50 µA with ±5% tolerance (3.70–4.10 V), and temperature coefficient is optimized for low-drift performance in the 3–4 V range. Reverse leakage remains ≤5 µA at VR = 2 V, supporting low-power standby regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal (3.70–4.10 V range); sets precise clamping/reference level for low-voltage rails. |
| Test Current (IZT) | 50 µA; defines the operating point where VZ is guaranteed and measured. |
| Reverse Leakage (IR) | 5 µA max @ VR = 2 V; ensures minimal quiescent current in standby mode. |
| Power Rating (PD) | 500 mW @ TL = 75°C; supports moderate transient energy absorption on standard PCBs. |
| Package | SOD−523 (1.20 × 0.80 × 0.60 mm); enables high-density placement on compact PCBs. |
| ESD Rating | Class 3 (>16 kV HBM); withstands handling and assembly without protection circuitry. |
Pinout & Package
SOD−523 surface-mount package with cathode indicated by polarity band; 2-terminal construction (cathode/anode) requiring no external biasing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path. |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT operation | 50 µA test current enables regulation in ultra-low-power systems (e.g., battery-backed circuits). |
| Precision voltage tolerance | ±5% VZ (3.70–4.10 V) ensures predictable clamping without post-assembly trimming. |
| High-density packaging | SOD−523 footprint (1.20 × 0.80 mm) saves >60% board area vs. SOD−123 in portable designs. |
| Automated assembly compatibility | Void-free thermoset case and corrosion-resistant finish support reliable reflow soldering. |
Applications
| Smartphone Power Rail Clamping | IoT Sensor Reference Stabilization |
|---|---|
Use Scenario: Protecting 3.3 V I/O lines from ESD transients and overvoltage in LTE/5G handsets. IC Role / Device Role / Timing Role: Shunt clamping diode placed between VIO and GND to limit voltage excursions. Use Value: 3.9 V VZ clamps below absolute maximum ratings of 3.6 V tolerant ICs while surviving >16 kV HBM events. |
Use Scenario: Providing stable 3.9 V reference for ADC input scaling in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference source for analog front-end signal conditioning. Use Value: 50 µA IZT and 5 µA leakage enable microamp-level system sleep current without reference drift. |
| Wearable Battery Monitoring | USB-C Port Overvoltage Protection |
Use Scenario: Regulating voltage for fuel gauge IC supply in compact hearables with Li-ion cells. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator feeding precision monitoring circuitry. Use Value: SOD−523 size fits within 2.0 mm² PCB real estate constraints while delivering ±5% VZ stability. |
Use Scenario: Clamping CC line voltage during USB-C plug insertion to prevent controller latch-up. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on communication bus lines. Use Value: 250 °C/W RJA and 500 mW rating absorb short-duration surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V9 | Same 3.9 V nominal VZ, but SOD-323 package (1.7 × 1.3 mm); 200 mW rating; 10 µA IR @ 2 V. | Lower power handling and larger footprint reduce suitability for ultra-dense layouts. | Select when legacy SOD-323 footprint compatibility is required and 200 mW suffices. |
| MMSZ4686T1G | Identical electrical specs (3.9 V, 50 µA IZT, 5 µA IR), but SOD-123 package (3.7 × 1.6 mm); 500 mW rating. | 3× larger footprint limits use in sub-3 mm² modules; higher thermal mass slows response. | Choose only if SOD-123 is mandated by existing layout or thermal mass improves surge resilience. |
Compared with BZX584C3V9 and MMSZ4686T1G, MM5Z4686T1G delivers identical Zener performance in the smallest possible footprint (SOD−523), enabling highest PCB density and lowest parasitic capacitance-critical for RF-adjacent and wearables applications.
Availability
MM5Z4686T1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, IoT sensor reference stabilization, and wearable battery monitoring requiring stable component supply across high-mix production runs.
Supply support for MM5Z4686T1G 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 supplier of energy-efficient semiconductor solutions, specializing in automotive, industrial, cloud, and IoT applications.
The MM5Z4xxxTxG series is designed specifically for space-constrained, low-power voltage regulation and ESD protection in portable electronics, emphasizing miniaturization, reliability, and Pb-free compliance.
FAQ
What is the Zener voltage tolerance of MM5Z4686T1G?
The MM5Z4686T1G has a nominal Zener voltage of 3.9 V with a guaranteed tolerance of ±5%, meaning the actual VZ falls between 3.70 V and 4.10 V when measured at IZT = 50 µA and TA = 25°C. This tight tolerance eliminates need for external calibration in most low-voltage reference applications.
Can MM5Z4686T1G be used in place of a 3.3 V Zener diode?
No-MM5Z4686T1G is specified for 3.9 V nominal Zener voltage and is not a substitute for 3.3 V devices like MM5Z3V3T1G. Using it in a 3.3 V rail would result in insufficient clamping margin and potential IC damage during overvoltage events. Always match VZ to the target rail's absolute maximum rating.
What is the maximum reverse leakage current for MM5Z4686T1G?
The MM5Z4686T1G exhibits a maximum reverse leakage current (IR) of 5 µA when biased at VR = 2 V and TA = 25°C. This low leakage supports microamp-level standby current budgets in battery-powered systems without compromising regulation accuracy.
Is MM5Z4686T1G RoHS compliant and lead-free?
Yes-MM5Z4686T1G is explicitly marked as Pb−Free in the ordering information and complies with RoHS Directive 2011/65/EU. The "G" suffix denotes lead-free packaging, and the device meets onsemi's Pb−Free strategy including compatible soldering profiles up to 260°C for 10 seconds.
What is the thermal resistance (RJA) of MM5Z4686T1G?
The MM5Z4686T1G has a junction-to-ambient thermal resistance (RJA) of 250 °C/W when mounted on an FR−5 board per the defined footprint. This value governs power derating: above 75°C board temperature, power must be reduced by 4.0 mW/°C to maintain safe junction temperatures.
MM5Z4686T1G 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):
- 3.9 V
- Tolerance:
- ±5.13%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
MM5Z4686T1G FAQ
1.How can I place an order for MM5Z4686T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z4686T1G 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 MM5Z4686T1G reliable?
The price and inventory of MM5Z4686T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z4686T1G is usually 5 days.
3.What payment methods are accepted for MM5Z4686T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z4686T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z4686T1G?
MM5Z4686T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z4686T1G 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 MM5Z4686T1G?
For technical support, including MM5Z4686T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z4686T1G requirements.
6.How does Aetrix verify that MM5Z4686T1G is sourced from the original manufacturer or authorized distributors?
All MM5Z4686T1G 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 MM5Z4686T1G meets industry standards.
7.What is the process for return or replacement of MM5Z4686T1G?
All MM5Z4686T1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z4686T1G, 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 MM5Z4686T1G part is unused and in its original packaging.
Return procedure for MM5Z4686T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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