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onsemi MM3Z3V9T1
- Part No.:
- MM3Z3V9T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z3V9T1.pdf
- Description:
- DIODE ZENER 3.9V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,012
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Product details
Overview
MM3Z3V9T1 from onsemi is a 3.9 V ±0.2 V Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation, 90 Ω maximum dynamic impedance at 5 mA test current, and 3 µA maximum reverse leakage at 1.0 V reverse voltage. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MM3Z3V9T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3 >16 kV HBM), and direct alternative part comparisons for low-voltage reference and overvoltage protection design.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 3.9 V reference voltage across load variations and temperature shifts. Its −2.5 mV/°C temperature coefficient ensures predictable drift below 4.1 V nominal range, and its 450 pF capacitance at 0 V bias supports high-frequency decoupling roles in RF front-ends.
The device uses void-free transfer-molded plastic packaging with Pb−Sn or Sn-only plating, UL 94 V−0 flammability rating, and 260°C/10s soldering tolerance. Cathode polarity is marked by a band, and mounting position is unrestricted per mechanical specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7 V to 4.1 V at IZT = 5 mA - defines tight regulation window for 3.3 V rail clamping and reference buffering |
| Power Dissipation (PD) | 200 mW @ TA = 25°C - limits continuous current to ~51 mA at 3.9 V, suitable for low-power bias networks |
| Zener Impedance (ZZT) | 90 Ω max @ 5 mA - determines output voltage stability under dynamic load transients in feedback paths |
| Reverse Leakage (IR) | 3 µA max @ VR = 1.0 V - ensures minimal quiescent current draw in always-on voltage monitor circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into handheld device I/O lines without external protection |
| Capacitance (C) | 450 pF @ VR = 0, f = 1 MHz - impacts high-frequency noise filtering capability in RF detector biasing |
| Thermal Resistance (RJA) | 635 °C/W - requires board-level thermal management for sustained operation above 40°C ambient |
Pinout & Package
SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode marked by polarity band. Compatible with standard FR-4 PCB reflow profiles (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity band identifies this terminal for correct orientation during placement |
| 2 (Anode) | Reference ground return | Typically tied to system ground or low-impedance return path; establishes reference potential for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±0.2 V at 3.9 V nominal - enables accurate 3.3 V rail supervision without external trimming |
| Low-profile SOD−323 footprint | 1.7 mm × 1.25 mm × 0.9 mm - fits within 2.0 mm × 1.5 mm board area, ideal for ultra-compact wearables |
| High ESD immunity | Class 3 (>16 kV HBM) - eliminates need for discrete TVS in cellular phone antenna switch control lines |
| Pb−Free compatibility | Sn-only or Pb−Sn plating - meets RoHS compliance requirements without sacrificing solder joint reliability |
| Stable temperature coefficient | −2.5 mV/°C - minimizes reference drift over −40°C to +85°C industrial operating range |
Applications
| Portable Power Monitoring | RF Front-End Biasing |
|---|---|
|
Use Scenario: Real-time battery voltage monitoring in Bluetooth earbuds using ADC input scaling. IC Role / Device Role / Timing Role: Zener reference diode providing stable 3.9 V reference for ADC voltage divider network. Use Value: Enables ±1% battery SOC estimation accuracy over temperature without calibration due to tight 3.7–4.1 V VZ tolerance. |
Use Scenario: Bias voltage generation for GaAs FET amplifier stages in 2.4 GHz Wi-Fi modules. IC Role / Device Role / Timing Role: Low-capacitance Zener clamp regulating gate bias to prevent overdrive during RF envelope peaks. Use Value: 450 pF capacitance and 90 Ω ZZT ensure minimal RF signal distortion while maintaining stable DC bias point. |
| USB-C Port Protection | Industrial Sensor Signal Conditioning |
|
Use Scenario: Overvoltage clamp on USB-C CC line to protect Type-C controller IC from hot-plug transients. IC Role / Device Role / Timing Role: Fast-response Zener shunt protecting 3.3 V logic interface against >5.5 V fault conditions. Use Value: 3 µA leakage at 1.0 V ensures negligible impact on CC line pull-up/pull-down resistor networks. |
Use Scenario: Reference stabilization for 12-bit sigma-delta ADC measuring thermocouple outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Temperature-compensated Zener reference source for ADC internal reference buffer. Use Value: −2.5 mV/°C TC and 200 mW rating allow stable 3.9 V reference across −25°C to +70°C operating range. |
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-B3V9,115 | 3.9 V ±5%, 300 mW rating, SOD-323 package, 90 Ω ZZT, 3 µA IR @ 1 V | Higher power rating allows higher current clamping but larger voltage tolerance reduces precision in reference use | Select when higher surge energy handling is required and ±5% VZ tolerance is acceptable |
| MMSZ4685T1G | 3.9 V ±5%, 500 mW rating, SOD-123 package, 100 Ω ZZT, 1 µA IR @ 1 V | Larger SOD-123 footprint increases board area; lower leakage benefits ultra-low-power sensor nodes | Select when lower leakage dominates over size constraints and layout space permits larger package |
Compared with MM3Z3V9T1, BZX384-B3V9 offers higher power margin but looser voltage tolerance, while MMSZ4685T1G trades compactness for lower leakage and higher power-making MM3Z3V9T1 optimal for space-limited 3.3 V reference designs requiring tight VZ control.
Availability
MM3Z3V9T1 is available at Aetrix Electronics and suitable for portable power monitoring, RF front-end biasing, USB-C port protection, industrial sensor signal conditioning, and low-voltage reference stabilization requiring stable component supply and consistent parametric performance.
Supply support for MM3Z3V9T1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
MM3Z3V9T1 belongs to the MM3Z2V4T1 series of 200 mW Zener regulators designed specifically for miniaturized consumer electronics where board space, ESD robustness, and precise low-voltage regulation are critical.
FAQ
What is the Zener voltage tolerance of MM3Z3V9T1?
The MM3Z3V9T1 has a Zener voltage range of 3.7 V to 4.1 V at 5 mA test current, corresponding to a nominal 3.9 V with ±0.2 V absolute tolerance. This tight window is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet revision 7, and supports precision reference applications without external trimming.
Does MM3Z3V9T1 support Pb−Free assembly processes?
Yes, MM3Z3V9T1 is available in a Pb−Free version denoted by the "G" suffix (MM3Z3V9T1G), with Sn-only plating compatible with lead-free reflow profiles. The datasheet specifies maximum soldering temperature of 260°C for 10 seconds, and UL 94 V−0 flammability rating ensures process compatibility.
What is the thermal resistance of MM3Z3V9T1 and how does it affect layout?
MM3Z3V9T1 has a junction-to-ambient thermal resistance (RJA) of 635 °C/W. At full 200 mW dissipation, this results in ~127°C junction rise above ambient-requiring careful copper pour design and avoiding dense thermal islands. Derating begins at 1.5 mW/°C above 25°C ambient per the Maximum Ratings table.
Can MM3Z3V9T1 be used as a substitute for MM3Z3V3T1 in a 3.3 V rail clamp?
No-MM3Z3V9T1 is not a functional substitute for MM3Z3V3T1 in 3.3 V rail clamping because its 3.7–4.1 V Zener range exceeds the 3.3 V rail's maximum safe operating voltage. MM3Z3V3T1 (3.1–3.5 V) provides appropriate headroom; using MM3Z3V9T1 risks insufficient clamping and potential downstream IC damage.
What is the maximum reverse leakage current for MM3Z3V9T1 and at what voltage is it specified?
The maximum reverse leakage current for MM3Z3V9T1 is 3 µA, specified at VR = 1.0 V (reverse voltage) and TA = 25°C. This value appears in the Electrical Characteristics table under "IR @ VR" for device MM3Z3V9T1, G, and directly impacts quiescent current in always-on monitoring circuits.
MM3Z3V9T1 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):
- 3.9 V
- Tolerance:
- ±5%
- 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-323
MM3Z3V9T1 FAQ
1.How can I place an order for MM3Z3V9T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z3V9T1 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 MM3Z3V9T1 reliable?
The price and inventory of MM3Z3V9T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z3V9T1 is usually 5 days.
3.What payment methods are accepted for MM3Z3V9T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z3V9T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z3V9T1?
MM3Z3V9T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z3V9T1 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 MM3Z3V9T1?
For technical support, including MM3Z3V9T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z3V9T1 requirements.
6.How does Aetrix verify that MM3Z3V9T1 is sourced from the original manufacturer or authorized distributors?
All MM3Z3V9T1 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 MM3Z3V9T1 meets industry standards.
7.What is the process for return or replacement of MM3Z3V9T1?
All MM3Z3V9T1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z3V9T1, 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 MM3Z3V9T1 part is unused and in its original packaging.
Return procedure for MM3Z3V9T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z3V9T1 Tags
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