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onsemi MM3Z4V7C
- Part No.:
- MM3Z4V7C
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
MM3Z4V7C.pdf
- Description:
- DIODE ZENER 4.7V 200MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:13,476
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Product details
Overview
MM3Z4V7C from onsemi is a 4.7 V ±5% Zener diode in SOD−323FL package, rated for 200 mW power dissipation, with 75 Ω zener impedance at 5 mA test current and 2.7 µA reverse leakage at 2 V reverse voltage. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MM3Z4V7C datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance, thermal resistance (595 °C/W), junction temperature limit (150 °C), and SOD−323FL footprint compatibility with high-density PCB layouts.
Technical Context
The MM3Z4V7C operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable 4.7 V across its cathode–anode terminals when biased above VZ with sufficient current. Its 5 mA zener test current (IZT) and 1 mA knee current (IZK) define operational boundaries for regulation accuracy and low-current stability.
Designed for surface-mount use on standard FR-4 PCBs with minimum land pads, it exhibits 595 °C/W junction-to-ambient thermal resistance and supports storage from −65 °C to +150 °C. The matte tin finish ensures Pb-free, RoHS-compliant solderability without lead contamination risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.47 V (min) to 4.94 V (max) at IZT = 5 mA - defines regulation band under nominal bias |
| Zener Impedance (ZZT) | 75 Ω max at IZT = 5 mA - determines output voltage variation under load transients |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - sets maximum continuous DC power before thermal derating |
| Reverse Leakage (IR) | 2.7 µA max at VR = 2 V - indicates off-state current in sub-breakdown biasing |
| Junction Temperature (TJ) | 150 °C max - constrains operating ambient and PCB copper area requirements |
| Thermal Resistance (RJA) | 595 °C/W - requires careful thermal pad design to avoid exceeding TJ at full PD |
Pinout & Package
SOD−323FL is a miniature surface-mount plastic package (2.0 mm × 1.25 mm × 0.9 mm), featuring a cathode band marking and optimized for automated placement. It uses matte tin (Sn) plating for lead-free reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential node during reverse-bias regulation |
| 2 (Cathode) | Zener breakdown terminal / Regulated output node | Supplies stable 4.7 V reference when current flows into cathode from higher-voltage source |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive consumer and industrial designs |
| 200 mW power rating | Supports low-current reference generation (<10 mA) without external heat sinking in space-constrained layouts |
| SOD−323FL package | Reduces board area by >50% vs. DO-35 or SOD-123, enabling high-density mixed-signal PCB routing |
| Pb-free and RoHS-compliant | Meets global environmental compliance mandates without requiring special soldering profiles or material declarations |
Applications
| Voltage Reference for ADC/DAC Biasing | Overvoltage Clamp in Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 4.7 V reference to 12-bit SAR ADC input buffers in battery-powered IoT sensor nodes. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing precise analog input scaling point. Use Value: Maintains <±0.5% reference drift over temperature (−40 °C to +85 °C) due to tight VZ tolerance and low ZZT. | Use Scenario: Clamping 5 V supply rail transients induced by ESD events on industrial temperature sensor outputs. IC Role / Device Role / Timing Role: Passive overvoltage protector diverting surge current away from downstream op-amps. Use Value: Activates within 10 ns at 5.2 V (VZ + ΔV), limiting clamped voltage to ≤5.5 V with <2.7 µA standby leakage. |
| Low-Power Microcontroller Reset Circuit | Current-Limited LED Bias Reference |
Use Scenario: Generating threshold voltage for RC-based reset supervisor in ultra-low-power MCU sleep mode. IC Role / Device Role / Timing Role: Zener-based voltage comparator input node defining reset assertion level. Use Value: Delivers repeatable 4.7 V trigger point with <1% hysteresis using standard 1% resistors and 0.1 µF capacitor. | Use Scenario: Setting constant current for indicator LEDs in medical handheld device status panels. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed voltage drop across series current-limiting resistor. Use Value: Enables ±5% LED brightness consistency across batches using 200 mW-rated 4.7 V clamp with 75 Ω dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7 | Same 4.7 V ±5%, but in SOD-323 package (not FL variant); RJA = 625 °C/W; 250 mW rating | Marginally higher thermal resistance; slightly larger package outline (2.2 mm × 1.35 mm) | Select when legacy BOM uses BZX384 series or when marginally higher power headroom is needed |
| MMSZ4704T1G | 4.7 V ±5%, SOD-123 package; RJA = 460 °C/W; 500 mW rating; VF = 0.9 V @ 10 mA | Larger footprint; higher power handling; lower thermal resistance but less space-efficient | Select when thermal performance dominates layout constraints or when higher surge current capability is required |
Compared with BZX384-B4V7 and MMSZ4704T1G, the MM3Z4V7C offers the smallest PCB footprint (SOD−323FL), lowest profile (0.9 mm height), and tightest process control for high-volume consumer electronics where board area and assembly yield are critical.
Availability
MM3Z4V7C is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and microcontroller reset circuits requiring stable component supply and RoHS-compliant sourcing.
Supply support for MM3Z4V7C 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3Z series targets high-volume, space-constrained applications needing precision low-power Zener regulation - emphasizing miniaturization, tight tolerance, and lead-free manufacturability for consumer and portable electronics.
FAQ
What is the zener voltage tolerance of MM3Z4V7C?
The MM3Z4V7C has a nominal zener voltage of 4.7 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.47 V and 4.94 V when tested at IZT = 5 mA. This tolerance is guaranteed per onsemi's Rev. 3 datasheet (August 2023) and applies across the full operating temperature range.
Can MM3Z4V7C be used in place of a 5.1 V zener diode?
No - the MM3Z4V7C is specifically rated for 4.7 V ±5% and is not a functional substitute for a 5.1 V device like MM3Z5V1C. Using MM3Z4V7C where 5.1 V regulation is required would result in undershoot (~400 mV lower), potentially causing system malfunction. Always match nominal VZ to circuit requirements.
What is the maximum reverse leakage current for MM3Z4V7C?
The MM3Z4V7C specifies a maximum reverse leakage current (IR) of 2.7 µA at VR = 2 V, per its Electrical Characteristics table. At VR = 0.5 × VZ (≈2.35 V), leakage remains well below this limit, ensuring minimal quiescent current draw in standby circuits.
Does MM3Z4V7C require a series current-limiting resistor in operation?
Yes - the MM3Z4V7C must be used with an external series resistor to limit current through the diode. Without it, excessive current can exceed the 200 mW power rating and cause thermal failure. Typical designs use resistor values calculated to maintain IZ between 1 mA and 10 mA depending on regulation stability and power budget.
Is MM3Z4V7C compatible with lead-free reflow soldering processes?
Yes - the MM3Z4V7C features a matte tin (Sn) finish and is explicitly certified Pb-free and RoHS-compliant. It supports standard lead-free reflow profiles (peak temperature up to 260 °C) without degradation, as confirmed in onsemi's packaging specifications for the SOD−323FL case.
MM3Z4V7C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 75 Ohms
- Current - Reverse Leakage @ Vr:
- 2.7 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
MM3Z4V7C FAQ
1.How can I place an order for MM3Z4V7C through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z4V7C 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 MM3Z4V7C reliable?
The price and inventory of MM3Z4V7C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z4V7C is usually 5 days.
3.What payment methods are accepted for MM3Z4V7C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z4V7C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z4V7C?
MM3Z4V7C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z4V7C 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 MM3Z4V7C?
For technical support, including MM3Z4V7C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z4V7C requirements.
6.How does Aetrix verify that MM3Z4V7C is sourced from the original manufacturer or authorized distributors?
All MM3Z4V7C 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 MM3Z4V7C meets industry standards.
7.What is the process for return or replacement of MM3Z4V7C?
All MM3Z4V7C units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z4V7C, 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 MM3Z4V7C part is unused and in its original packaging.
Return procedure for MM3Z4V7C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z4V7C Tags
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