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onsemi MM5Z4V3ST1
- Part No.:
- MM5Z4V3ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z4V3ST1.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:20,830
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Product details
Overview
MM5Z4V3ST1 from onsemi is a 4.3 V ±3% Zener diode in SOD−523 package, rated for 200 mW steady-state power dissipation at 25°C, with 90 Ω max Zener impedance at 5 mA test current and 1.0 μA max reverse leakage at 3.0 V. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MM5Z4V3ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±3%), low-profile SOD−523 footprint (1.20 mm × 0.80 mm), ESD robustness (>16 kV HBM), thermal resistance (635°C/W), and tight ZZK (1000 Ω max at 1 mA).
Technical Context
The MM5Z4V3ST1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to clamp voltage at 4.17–4.43 V with temperature coefficient of −3.5 mV/°C. Its design supports stable regulation under low-current conditions (IZT = 5 mA, IZK = 1 mA) and maintains low capacitance (450 pF max at 0 V, 1 MHz).
It features Pb-free matte tin lead finish, meets MSL 1 reflow requirements (260°C peak), and is qualified for use on FR-4 PCBs with minimum pad layout. The SOD−523 case (502-01) has void-free thermosetting epoxy meeting UL 94 V−0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.17–4.43 V at 5 mA - defines precise clamping threshold for overvoltage protection |
| Power Rating (PD) | 200 mW at 25°C - limits continuous dissipation without derating |
| Zener Impedance (ZZT) | 90 Ω max at 5 mA - ensures minimal voltage shift under load variation |
| Reverse Leakage (IR) | 1.0 μA max at 3.0 V - guarantees low standby current in bias networks |
| Capacitance (C) | 450 pF max at 0 V, 1 MHz - constrains high-frequency noise coupling in signal paths |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld ESD-prone interfaces |
| Package | SOD−523 (Case 502) - 1.20 mm × 0.80 mm × 0.70 mm footprint for ultra-dense layouts |
Pinout & Package
SOD−523 surface-mount package with cathode marked by band; body dimensions 1.20 mm × 0.80 mm × 0.70 mm; mounting position unrestricted; qualified for 260°C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to regulated node; carries reverse current during breakdown |
| 2 (Anode) | Reference/ground terminal | Bonded to PCB ground plane; establishes voltage reference point for clamping |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±3% (4.17–4.43 V) - reduces binning needs and improves system-level voltage accuracy |
| Low-profile packaging | 0.7 mm height - enables stacking under shields or beneath connectors in slim devices |
| High ESD immunity | >16 kV HBM - eliminates need for external ESD protection in front-end I/O rails |
| Pb-free construction | 100% matte Sn finish - complies with RoHS and JEDEC J-STD-020 MSL 1 standards |
Applications
| Smartphone Power Rail Clamp | USB Interface ESD Protection |
|---|---|
Use Scenario: Clamping 5 V USB VBUS line against transient surges during hot-plug events. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert surge current away from USB PHY IC. Use Value: 4.3 V breakdown prevents damage to 5 V-tolerant transceivers while maintaining <1.0 μA leakage at nominal VBUS. | Use Scenario: Protecting microcontroller GPIO pins connected to USB D+/D− lines. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) Zener providing bidirectional clamping without signal integrity degradation. Use Value: Enables direct connection to 12 Mbps full-speed USB without added series resistance or timing skew. |
| Wearable Sensor Bias Reference | IoT Node Battery Monitor Threshold |
Use Scenario: Generating stable 4.3 V reference for analog sensor excitation in coin-cell-powered wearables. IC Role / Device Role / Timing Role: Precision Zener supplying regulated bias to bridge sensors or op-amp gain stages. Use Value: ±3% tolerance and −3.5 mV/°C TC ensure <±20 mV drift across −20°C to +70°C operating range. | Use Scenario: Detecting end-of-life battery voltage (e.g., Li-ion at 3.0 V cutoff) using comparator hysteresis. IC Role / Device Role / Timing Role: Zener referenced to battery rail to set accurate under-voltage lockout threshold. Use Value: 1.0 μA leakage at 3.0 V minimizes quiescent drain on primary cell during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V3 | Same 4.3 V nominal, but SOD-323 package (1.7 mm × 1.3 mm); 350 mW rating; 100 Ω ZZT | Larger footprint; higher power handling; less suitable for ultra-dense PCBs | Select when higher surge energy absorption is required and board area permits |
| MMSZ4V3T1G | SOD-123 package (3.7 mm × 1.6 mm); 500 mW rating; 90 Ω ZZT; ±5% VZ tolerance | Significantly larger size; looser voltage tolerance; better thermal dissipation | Choose for industrial designs needing higher reliability margin and easier hand-soldering |
Compared with BZX584-C4V3 and MMSZ4V3T1G, the MM5Z4V3ST1 offers the smallest footprint (SOD−523), tightest voltage tolerance (±3%), and lowest profile (0.7 mm), making it optimal for miniaturized consumer electronics where board area and height are constrained.
Availability
MM5Z4V3ST1 is available at Aetrix Electronics and suitable for smartphone power rail clamp, USB interface ESD protection, and wearable sensor bias reference requiring stable component supply across high-volume production cycles.
Supply support for MM5Z4V3ST1 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5Z4V3ST1 belongs to the MM5ZxxxST1 series of miniature Zener regulators designed specifically for space-constrained portable electronics requiring precision voltage clamping and high ESD resilience.
FAQ
What is the Zener voltage tolerance of MM5Z4V3ST1?
The MM5Z4V3ST1 has a Zener voltage tolerance of ±3%, specified as 4.17 V minimum to 4.43 V maximum at 5 mA test current. This tight tolerance enables accurate voltage clamping without post-production calibration and reduces design margin overhead in precision biasing circuits. The MM5Z4V3ST1 achieves this via process-controlled doping and laser trimming during manufacturing.
Does MM5Z4V3ST1 support lead-free reflow soldering?
Yes, the MM5Z4V3ST1 uses 100% matte tin lead finish and is qualified for lead-free reflow up to 260°C peak temperature per JEDEC J-STD-020. It meets MSL Level 1 requirements, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. The MM5Z4V3ST1's SOD−523 package is fully compatible with standard surface-mount reflow profiles.
What is the maximum reverse leakage current for MM5Z4V3ST1?
The MM5Z4V3ST1 specifies a maximum reverse leakage current (IR) of 1.0 μA at 3.0 V reverse voltage and 25°C ambient temperature. This low leakage ensures minimal power loss in battery-operated systems and preserves accuracy in high-impedance reference networks. The MM5Z4V3ST1 maintains this performance across its full operating temperature range (−65°C to +150°C).
How does the thermal resistance of MM5Z4V3ST1 affect its power handling?
The MM5Z4V3ST1 has a junction-to-ambient thermal resistance (RJA) of 635°C/W on FR-4 board, limiting its usable power dissipation to 200 mW at 25°C. Above 25°C, it must be derated at 1.5 mW/°C - e.g., only 125 mW at 75°C ambient. This RJA value reflects the SOD−523 package's small thermal mass and limited copper pad area, so the MM5Z4V3ST1 is optimized for low-duty-cycle or low-current regulation, not continuous high-power operation.
Is MM5Z4V3ST1 suitable for ESD protection in USB 2.0 interfaces?
Yes, the MM5Z4V3ST1 is suitable for USB 2.0 ESD protection due to its 450 pF capacitance at 0 V (1 MHz), Class 3 (>16 kV HBM) ESD rating, and fast response in reverse breakdown. Its 4.3 V Zener voltage clamps transients before they reach the 5.5 V absolute maximum rating of most USB PHY ICs. The MM5Z4V3ST1's compact SOD−523 footprint allows placement directly at the connector, minimizing trace inductance and improving protection efficacy.
MM5Z4V3ST1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±3%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z4V3ST1 FAQ
1.How can I place an order for MM5Z4V3ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z4V3ST1 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 MM5Z4V3ST1 reliable?
The price and inventory of MM5Z4V3ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z4V3ST1 is usually 5 days.
3.What payment methods are accepted for MM5Z4V3ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z4V3ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z4V3ST1?
MM5Z4V3ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z4V3ST1 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 MM5Z4V3ST1?
For technical support, including MM5Z4V3ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z4V3ST1 requirements.
6.How does Aetrix verify that MM5Z4V3ST1 is sourced from the original manufacturer or authorized distributors?
All MM5Z4V3ST1 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 MM5Z4V3ST1 meets industry standards.
7.What is the process for return or replacement of MM5Z4V3ST1?
All MM5Z4V3ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z4V3ST1, 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 MM5Z4V3ST1 part is unused and in its original packaging.
Return procedure for MM5Z4V3ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z4V3ST1 Tags
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