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onsemi MM3Z4V7T1
- Part No.:
- MM3Z4V7T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z4V7T1.pdf
- Description:
- DIODE ZENER 4.7V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,090
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Product details
Overview
MM3Z4V7T1 from onsemi is a 4.7 V ±5% Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation, 80 Ω max dynamic impedance at 5 mA test current, and 3 µA max reverse leakage at 2.0 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface overvoltage protection.
For engineers reviewing the MM3Z4V7T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 4.4–5.0 V nominal Zener range, low 0.9 V forward voltage at 10 mA, Class 3 ESD rating (>16 kV HBM), 260 pF capacitance at 0 V bias, and compatibility with reflow soldering up to 260°C for 10 seconds.
Technical Context
The MM3Z4V7T1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to clamp or regulate voltage across load circuits. Its Zener mechanism delivers stable 4.7 V regulation under controlled reverse current (IZT = 5 mA) with minimal temperature drift (−3.5 mV/°C).
Designed for surface-mount use on FR-4 PCBs, it features cathode-anode polarity marked by a band, Pb-free plating options, UL 94 V-0 flammability compliance, and thermal resistance of 635°C/W junction-to-ambient - enabling reliable operation from −65°C to +150°C storage and junction temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4–5.0 V at IZT = 5 mA - defines clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 200 mW at TA = 25°C - sets maximum continuous power handling on standard FR-4 board |
| Zener Impedance (ZZT) | 80 Ω max at IZT = 5 mA - determines regulation accuracy under dynamic load transients |
| Reverse Leakage (IR) | 3 µA max at VR = 2.0 V - ensures low standby current in always-on bias networks |
| Capacitance (C) | 260 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent layouts |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated assembly and end-user environments |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - enables use as low-drop rectifier or logic-level shunt in dual-direction protection |
Pinout & Package
SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode indicated by polarity band. Designed for high-density PCB placement with minimal footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or voltage reference node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| 200 mW Power Rating | Enables compact overvoltage suppression without heatsinking in battery-powered devices |
| Low 260 pF Capacitance | Maintains signal integrity in high-speed data lines (e.g., USB 2.0, I²C) when used for ESD clamping |
| −3.5 mV/°C Tempco | Ensures <±50 mV drift over −40°C to +85°C ambient - suitable for non-critical reference applications |
| Pb-Free Plating Option | Supports RoHS-compliant manufacturing with Sn-only or Pb-Sn terminations per J-STD-020 reflow profile |
| UL 94 V-0 Flammability | Meets safety requirements for consumer electronics enclosures and internal PCB mounting |
Applications
| Smartphone Power Rail Protection | USB Interface ESD Clamping |
|---|---|
|
Use Scenario: Clamping transient spikes on 5 V USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Passive voltage clamp placed between VBUS and GND, conducting only during overvoltage events. Use Value: Limits VBUS excursion to ≤5.0 V using 4.7 V Zener breakdown, leveraging 260 pF capacitance to minimize signal distortion on 480 Mbps data lanes. |
Use Scenario: Protecting USB D+ and D− differential pairs from human-body-model ESD events. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor configured in back-to-back Zener arrangement. Use Value: Provides >16 kV HBM ESD immunity while adding <0.5 pF per line parasitic capacitance due to low 260 pF total device capacitance. |
| Wearable Sensor Bias Reference | IoT Node Battery Monitoring |
|
Use Scenario: Generating stable 4.7 V reference for analog front-end amplifiers in hearable devices. IC Role / Device Role / Timing Role: Shunt voltage reference supplying bias current to op-amp input stages. Use Value: Delivers <±5% tolerance and −3.5 mV/°C drift across operating temperature, enabling accurate sensor signal conditioning within 1.7 mm × 1.25 mm footprint. |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider with Zener-stabilized ADC reference. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known reference point for voltage measurement circuitry. Use Value: Maintains 4.7 V regulation with only 3 µA leakage at 2.0 V reverse bias, minimizing quiescent current drain in multi-year battery-life designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7 | Same 4.7 V nominal Zener, but 300 mW power rating and 150 Ω ZZT at 5 mA | Higher power handling suits higher-current clamp circuits; larger SOD-323 variant may require layout adjustment | Select for applications needing >200 mW surge capability where board space allows |
| MMSZ4700T1G | 4.7 V Zener, 500 mW rating, 100 Ω ZZT, but SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint and higher thermal mass improve reliability in thermally stressed environments | Choose when thermal derating margin or legacy SOD-123 compatibility is required |
Compared with BZX384-B4V7 and MMSZ4700T1G, the MM3Z4V7T1 offers the smallest footprint (1.7 mm × 1.25 mm) and lowest capacitance (260 pF), making it optimal for ultra-dense portable PCBs where ESD response speed and layout area are critical constraints.
Availability
MM3Z4V7T1 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface ESD clamping, and wearable sensor bias reference requiring stable component supply across high-volume production cycles.
Supply support for MM3Z4V7T1 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The MM3Z4V7T1 belongs to the MM3Z2V4T1 series of 200 mW Zener regulators designed specifically for space-constrained portable electronics requiring precise, low-capacitance voltage clamping and RoHS-compliant packaging.
FAQ
What is the Zener voltage tolerance of MM3Z4V7T1?
The MM3Z4V7T1 has a nominal Zener voltage of 4.7 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.4 V and 5.0 V when tested at IZT = 5 mA and TA = 25°C. This tolerance is specified in the Electrical Characteristics table of the official onsemi datasheet revision 7, and applies directly to the MM3Z4V7T1 part number.
Does MM3Z4V7T1 support lead-free soldering processes?
Yes, MM3Z4V7T1 is available in a Pb-free version denoted by the "G" suffix (MM3Z4V7T1G), with terminations plated in pure tin per J-STD-020 reflow standards. The package withstands peak reflow temperatures up to 260°C for 10 seconds, meeting industry-standard lead-free assembly requirements without compromising Zener performance.
What is the maximum reverse leakage current for MM3Z4V7T1?
The MM3Z4V7T1 exhibits a maximum reverse leakage current (IR) of 3 µA at VR = 2.0 V and TA = 25°C, as confirmed in the Electrical Characteristics table. This low leakage ensures minimal power loss in always-on bias networks and supports multi-year battery life in IoT sensor nodes using MM3Z4V7T1 as a reference element.
Can MM3Z4V7T1 be used for bidirectional ESD protection?
While the MM3Z4V7T1 is a unidirectional Zener diode, it can be deployed in a back-to-back configuration (two devices anode-to-anode) to provide bidirectional clamping for differential signal lines like USB D+/D−. Its 260 pF capacitance and >16 kV HBM rating make MM3Z4V7T1 suitable for this role when layout constraints favor ultra-small SOD−323 footprints.
What is the thermal resistance of MM3Z4V7T1?
The MM3Z4V7T1 has a junction-to-ambient thermal resistance (RJA) of 635°C/W when mounted on an FR-4 board, as specified in the Maximum Ratings table. This value reflects its 200 mW power dissipation limit at 25°C ambient and informs thermal design margins for sustained operation in enclosed handheld enclosures where airflow is restricted.
MM3Z4V7T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-323
MM3Z4V7T1 FAQ
1.How can I place an order for MM3Z4V7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z4V7T1 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 MM3Z4V7T1 reliable?
The price and inventory of MM3Z4V7T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z4V7T1 is usually 5 days.
3.What payment methods are accepted for MM3Z4V7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z4V7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z4V7T1?
MM3Z4V7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z4V7T1 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 MM3Z4V7T1?
For technical support, including MM3Z4V7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z4V7T1 requirements.
6.How does Aetrix verify that MM3Z4V7T1 is sourced from the original manufacturer or authorized distributors?
All MM3Z4V7T1 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 MM3Z4V7T1 meets industry standards.
7.What is the process for return or replacement of MM3Z4V7T1?
All MM3Z4V7T1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z4V7T1, 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 MM3Z4V7T1 part is unused and in its original packaging.
Return procedure for MM3Z4V7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z4V7T1 Tags
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