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onsemi MM5Z4V3
- Part No.:
- MM5Z4V3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523F
- Datasheet:
-
MM5Z4V3.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD523F
- Quantity:
- Payment:
- Shipping:
Inventory:311,820
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Product details
Overview
MM5Z4V3 from ON Semiconductor is a 500 mW, 4.3 V nominal Zener voltage regulator diode in SOD−523 package, with ±0.3 V tolerance (4.0–4.6 V), 90 Ω maximum Zener impedance at 5 mA test current, and 3 μA reverse leakage at 1 V, designed for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MM5Z4V3 datasheet, pinout, applications, or equivalent options, key selection considerations include its 4.3 V regulation accuracy, low-profile 1.20 mm × 0.80 mm footprint, Class 3 ESD rating (>16 kV HBM), thermal resistance of 250°C/W, and compatibility with reflow profiles up to 260°C.
Technical Context
The MM5Z4V3 operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds its Zener breakdown threshold. Its regulation is defined at IZT = 5 mA, with specified VZ range of 4.0 V to 4.6 V and temperature coefficient of −3.5 mV/°C.
It features a low body height of 0.7 mm and meets MSL 1 moisture sensitivity requirements, enabling use in high-density PCB assemblies without solder voiding risk. The device uses 100% matte tin lead finish and void-free thermosetting epoxy packaging compliant with UL 94 V−0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal, 4.0–4.6 V range at 5 mA - defines precise clamping/reference point for low-voltage circuits |
| Power Rating (PD) | 500 mW at 25°C - supports continuous regulation in compact battery-powered systems |
| Zener Impedance (ZZT) | 90 Ω max at 5 mA - ensures minimal voltage deviation under dynamic load changes |
| Reverse Leakage (IR) | 3 μA max at 1 V - enables ultra-low quiescent current in always-on monitoring paths |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling in manual assembly and end-user environments |
| Package | SOD−523 (Case 502) - 1.20 mm × 0.80 mm × 0.70 mm footprint ideal for smartphone and wearable PCBs |
Pinout & Package
SOD−523 surface-mount package with cathode marked by polarity band; total dimensions 1.20 mm × 0.80 mm × 0.70 mm, 100% matte tin lead finish, MSL 1 rated.
| 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 circuit ground or common return path; completes shunt regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Pb−Free & RoHS Compliant | Meets global environmental compliance without performance trade-offs or solderability loss |
| Low Profile Height | 0.7 mm max - enables stacking under shields or placement beneath connectors in ultra-thin devices |
| High ESD Robustness | Class 3 per HBM (>16 kV) - eliminates need for external ESD protection in many portable designs |
| Stable Tempco | −3.5 mV/°C - minimizes drift over industrial temperature range (−65°C to +150°C) |
| Reflow Compatible | Qualified to 260°C peak - supports standard lead-free SMT assembly without degradation |
Applications
| Smartphone Power Rail Clamping | Wearable Sensor Reference |
|---|---|
|
Use Scenario: Protecting 3.3 V or 3.6 V LDO outputs from transient overvoltage during hot-swap or battery insertion events. IC Role / Device Role / Timing Role: Shunt clamp element placed between rail and ground, absorbing surge energy before downstream ICs are stressed. Use Value: Prevents latch-up or permanent damage in PMICs and baseband processors using only 0.96 mm² board area. |
Use Scenario: Providing stable 4.3 V reference for analog front-end amplifiers in hearable biometric sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and sensor excitation circuits. Use Value: Enables <±1% measurement accuracy over −20°C to +70°C with no additional trimming components. |
| USB-C Port Protection | IoT Edge Node Voltage Supervision |
|
Use Scenario: Clamping VBUS line transients during plug insertion or cable ESD events in USB-C receptacles. IC Role / Device Role / Timing Role: Fast-acting overvoltage suppressor placed adjacent to port connector, triggered within nanoseconds. Use Value: Meets IEC 61000-4-2 Level 4 (8 kV contact) without requiring TVS diode array, reducing BOM count. |
Use Scenario: Monitoring 4.2 V lithium battery voltage in BLE-enabled asset trackers to trigger low-battery alerts. IC Role / Device Role / Timing Role: Threshold detector via resistor divider into microcontroller ADC, leveraging tight VZ tolerance. Use Value: Achieves ±0.1 V detection window with single external resistor, eliminating need for dedicated supervisor IC. |
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-C4V3 | Same 4.3 V nominal, but SOD-323 package (1.7 × 1.3 mm); 350 mW power rating; higher ZZT (120 Ω) | Larger footprint and lower power limit restrict use in ultra-dense layouts or higher-current clamping | Select when legacy SOD-323 layout exists or cost sensitivity outweighs size/power advantages |
| MMSZ4V3ET1G | SOD-123 package (3.7 × 1.6 mm); 500 mW rating; wider VZ tolerance (4.08–4.52 V); 100 Ω ZZT | Requires 4.6× more board area; less precise regulation limits use in high-accuracy references | Prefer for through-hole-compatible rework scenarios or where thermal mass improves long-term stability |
Compared with BZX584-C4V3 and MMSZ4V3ET1G, the MM5Z4V3 delivers superior space efficiency (smallest footprint), tighter voltage tolerance, and lower dynamic impedance-making it optimal for next-generation portable and wearables where PCB real estate and regulation precision are critical.
Availability
MM5Z4V3 is available at Aetrix Electronics and suitable for smartphone power rail clamping, wearable sensor reference, and IoT edge node voltage supervision requiring stable component supply, consistent parametric performance, and full traceability from wafer to shipment.
Supply support for MM5Z4V3 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM5Z4V3 belongs to the MM5ZxxxT1G Zener regulator family, engineered specifically for miniaturized, high-reliability voltage reference and transient suppression in portable and space-constrained electronic systems.
FAQ
What is the exact Zener voltage tolerance of MM5Z4V3 at 25°C?
The MM5Z4V3 has a guaranteed Zener voltage range of 4.0 V to 4.6 V at 5 mA test current and 25°C ambient temperature, with 4.3 V as the nominal value. This ±0.3 V tolerance is verified per the Electrical Characteristics table on page 3 of the official datasheet, and applies strictly to the MM5Z4V3T1G/T5G ordering variants.
Does MM5Z4V3 support lead-free reflow soldering?
Yes, the MM5Z4V3 is qualified for lead-free reflow with a maximum peak temperature of 260°C and meets MSL 1 requirements. Its 100% matte tin lead finish and void-free epoxy package ensure reliable wetting and intermetallic formation without delamination or popcorning during standard JEDEC J-STD-020-compliant profiles.
What is the maximum reverse leakage current for MM5Z4V3 at 1 V?
The MM5Z4V3 exhibits a maximum reverse leakage current (IR) of 3 μA at VR = 1 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in always-on supervisory circuits and battery-backed monitoring functions.
Is MM5Z4V3 suitable for automotive applications?
The SZMM5Z4V3T1G variant-not the standard MM5Z4V3T1G-is AEC-Q101 qualified and PPAP capable for automotive use. The base MM5Z4V3T1G is intended for commercial and industrial applications; its datasheet does not list automotive qualification, and no AEC-Q101 test reports are published for this specific ordering part number.
How does the temperature coefficient affect MM5Z4V3's regulation accuracy over temperature?
The MM5Z4V3 has a temperature coefficient of −3.5 mV/°C, meaning its Zener voltage decreases linearly with rising junction temperature. Over the full −65°C to +150°C range, this results in approximately ±0.6 V total drift, which must be accounted for in precision reference designs-especially when used without compensation networks.
MM5Z4V3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523F
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±7%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523F
MM5Z4V3 FAQ
1.How can I place an order for MM5Z4V3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z4V3 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 MM5Z4V3 reliable?
The price and inventory of MM5Z4V3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z4V3 is usually 5 days.
3.What payment methods are accepted for MM5Z4V3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z4V3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z4V3?
MM5Z4V3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z4V3 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 MM5Z4V3?
For technical support, including MM5Z4V3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z4V3 requirements.
6.How does Aetrix verify that MM5Z4V3 is sourced from the original manufacturer or authorized distributors?
All MM5Z4V3 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 MM5Z4V3 meets industry standards.
7.What is the process for return or replacement of MM5Z4V3?
All MM5Z4V3 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z4V3, 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 MM5Z4V3 part is unused and in its original packaging.
Return procedure for MM5Z4V3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z4V3 Tags
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