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onsemi MM3Z3V9C
- Part No.:
- MM3Z3V9C
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
MM3Z3V9C.pdf
- Description:
- DIODE ZENER 3.9V 200MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:8,299
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Product details
Overview
MM3Z3V9C from onsemi is a 3.9 V ±5% Zener diode in SOD−323FL package, rated for 200 mW power dissipation, with 84 Ω zener impedance at 5 mA test current and 2.7 µA reverse leakage at 1 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the MM3Z3V9C datasheet, pinout, applications, or equivalent options, key selection criteria include its tight ±5% VZ tolerance, low thermal resistance (595 °C/W), SOD−323FL footprint compatibility, and verified performance across −65 °C to +150 °C operating range.
Technical Context
This device operates as a two-terminal voltage regulator diode, conducting in reverse breakdown at nominal 3.9 V with specified dynamic impedance (84 Ω) measured at IZT = 5 mA. Its forward voltage is ≤1.0 V at 10 mA, confirming standard silicon PN junction behavior.
The MM3Z3V9C is designed for stable DC voltage referencing in space-constrained PCB layouts, leveraging its thin SOD−323FL package and matte tin finish. Junction temperature must not exceed 150 °C, and derating applies above 25 °C ambient per RJA = 595 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 3.71 V (min) to 4.1 V (max) at 5 mA - defines usable regulation band for precision biasing |
| ZZT | 84 Ω max at 5 mA - determines output impedance and load regulation sensitivity |
| PD | 200 mW - sets maximum continuous power handling without heatsinking |
| IR @ VR | 2.7 µA max at 1 V reverse - indicates low leakage for high-impedance reference nodes |
| TJ max | 150 °C - constrains thermal design margin in enclosed or high-ambient environments |
| RJA | 595 °C/W - requires careful PCB copper area planning for sustained power operation |
Pinout & Package
Package: SOD−323FL (Case 477AB), surface-mount, 2-pin, cathode-marked with band. Dimensions conform to JEDEC standard outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / Reference ground node | Connected to circuit common when used as shunt regulator; defines polarity for reverse-bias operation |
| 2 (Cathode) | Reverse breakdown terminal / Regulated output node | Connected to voltage source via series resistor; supplies stable 3.9 V to downstream loads |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct use in 3.3 V system biasing without trimming resistors |
| SOD−323FL ultra-thin package | Reduces board area by >40% vs. SOD-123; supports 0.65 mm pitch routing |
| Matte tin (Sn) finish | Ensures lead-free solderability and eliminates whisker risk in long-life applications |
| RoHS-compliant & Pb-free | Meets EU Directive 2011/65/EU and IPC-J-STD-609A Class 1 requirements |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Monitoring |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC input stages in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing 3.9 V bias to op-amp buffer and ADC reference divider network. Use Value: ±5% VZ tolerance and <2.7 µA leakage ensure <0.5 LSB error contribution at 3.3 V full-scale range. |
Use Scenario: Clamping CC line voltage during USB-C port negotiation to prevent false detection. IC Role / Device Role / Timing Role: Overvoltage protection element limiting CC pin to safe 3.9 V threshold before controller IC activation. Use Value: Fast 10 ms pulse-tested VZ stability ensures reliable handshake under transient bus conditions. |
| Low-Power IoT Node Voltage Supervision | Automotive Cabin Control Panel LED Biasing |
Use Scenario: Monitoring 3.3 V rail integrity in BLE-enabled asset trackers using microcontroller internal comparator. IC Role / Device Role / Timing Role: Precision threshold detector feeding comparator input with known 3.9 V reference against scaled supply. Use Value: 84 Ω ZZT minimizes voltage shift under 1 µA comparator input bias, preserving trip accuracy. |
Use Scenario: Setting consistent forward current for red/green status LEDs in HVAC control interface. IC Role / Device Role / Timing Role: Current-limiting shunt regulating LED string voltage drop across varying battery states (9–16 V). Use Value: 200 mW rating supports continuous operation at 5 mA while maintaining <1% VZ drift over −40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V9 | Same 3.9 V ±5%, but SOD-323 package (not FL variant); RJA = 625 °C/W | Marginally higher thermal resistance; identical electrical specs under 5 mA IZT | Select if legacy SOD-323 land pattern is fixed and 30 °C/W thermal penalty is acceptable |
| MMSZ4685 | 3.9 V ±5%, SOD-123 package; PD = 500 mW; ZZT = 90 Ω at 5 mA | Larger footprint and higher power capability; less suitable for ultra-dense layouts | Prefer when board space allows and higher surge current immunity is required |
Compared with BZX384-B3V9 and MMSZ4685, the MM3Z3V9C offers the lowest profile (SOD−323FL), best thermal efficiency among 200 mW-class 3.9 V Zeners, and optimized leakage performance for battery-critical designs.
Availability
MM3Z3V9C is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery monitoring, and low-power IoT node voltage supervision requiring stable component supply and RoHS-compliant sourcing.
Supply support for MM3Z3V9C 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3Z3V9C belongs to the MM3Z2V4C–MM3Z75VC Zener diode family, engineered for precision voltage regulation in miniaturized, high-reliability PCB assemblies where thermal and space constraints dominate.
FAQ
What is the maximum continuous power dissipation for MM3Z3V9C?
The MM3Z3V9C has a maximum power dissipation of 200 mW at 25 °C ambient temperature. Derating is required above this temperature per its thermal resistance of 595 °C/W. At 75 °C ambient, the allowable power drops to approximately 117 mW to maintain junction temperature ≤150 °C. This value is critical when sizing the series current-limiting resistor in shunt regulator configurations.
Does MM3Z3V9C meet RoHS and lead-free requirements?
Yes, the MM3Z3V9C is Pb-free and fully compliant with the EU RoHS Directive 2011/65/EU. It features a matte tin (Sn) finish and is manufactured under onsemi's qualified lead-free process. The device carries no exemptions and satisfies IPC-J-STD-609A Class 1 marking requirements for homogeneous material composition.
What is the reverse leakage current specification for MM3Z3V9C?
The MM3Z3V9C exhibits a maximum reverse leakage current (IR) of 2.7 µA at VR = 1 V, measured at 25 °C. This low leakage supports high-impedance reference applications such as precision ADC biasing or microcontroller wake-up threshold detection where minimal current draw is essential for battery longevity.
Can MM3Z3V9C be used in place of MM3Z3V6C or MM3Z4V3C?
No - MM3Z3V9C is not a functional substitute for MM3Z3V6C (3.6 V) or MM3Z4V3C (4.3 V), as its nominal Zener voltage (3.9 V) falls outside their respective tolerance bands. Substitution would cause incorrect biasing or regulation. Each part in the MM3Z series is uniquely marked (Z5 for MM3Z3V9C) and calibrated to its specific VZ bin.
What is the Zener impedance (ZZT) of MM3Z3V9C and why does it matter?
The MM3Z3V9C has a maximum Zener impedance (ZZT) of 84 Ω at IZT = 5 mA. This parameter quantifies how much the output voltage changes with load current variation - lower ZZT yields tighter regulation. In practice, it directly impacts line and load regulation accuracy in shunt reference designs, especially under dynamic current demands.
MM3Z3V9C 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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 84 Ohms
- Current - Reverse Leakage @ Vr:
- 2.7 µA @ 1 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
MM3Z3V9C FAQ
1.How can I place an order for MM3Z3V9C through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z3V9C 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 MM3Z3V9C reliable?
The price and inventory of MM3Z3V9C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z3V9C is usually 5 days.
3.What payment methods are accepted for MM3Z3V9C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z3V9C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z3V9C?
MM3Z3V9C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z3V9C 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 MM3Z3V9C?
For technical support, including MM3Z3V9C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z3V9C requirements.
6.How does Aetrix verify that MM3Z3V9C is sourced from the original manufacturer or authorized distributors?
All MM3Z3V9C 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 MM3Z3V9C meets industry standards.
7.What is the process for return or replacement of MM3Z3V9C?
All MM3Z3V9C units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z3V9C, 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 MM3Z3V9C part is unused and in its original packaging.
Return procedure for MM3Z3V9C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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