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onsemi MM3Z4V3T1
- Part No.:
- MM3Z4V3T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z4V3T1.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,601
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Product details
Overview
MM3Z4V3T1 from onsemi is a 4.3 V nominal Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation at 25°C, with 90 Ω maximum Zener impedance at 5 mA test current and 3 µA maximum leakage current at 1.0 V reverse bias. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the MM3Z4V3T1 datasheet, pinout, applications, or equivalent options, this device serves as a low-profile, high-ESD-tolerance (Class 3, >16 kV HBM) voltage reference and overvoltage clamp where tight Zener tolerance (±0.3 V), low capacitance (450 pF at 0 V), and Pb-free compliance are critical selection criteria.
Technical Context
The MM3Z4V3T1 operates as a two-terminal silicon Zener diode optimized for reverse-biased voltage regulation. Its breakdown behavior is characterized by a nominal 4.3 V Zener voltage at 5 mA (IZT), with temperature coefficient of −3.5 mV/°C and dynamic impedance tightly controlled to ≤90 Ω at IZT.
Designed for surface-mount use on FR-4 PCBs, it features a void-free transfer-molded plastic case (UL 94 V−0), cathode-indicated polarity band, and soldering compatibility up to 260°C for 10 seconds. Thermal resistance junction-to-ambient is 635°C/W, supporting operation across −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0–4.6 V at 5 mA test current - ensures stable clamping within ±0.3 V tolerance for 3.3 V rail protection |
| Power Dissipation (PD) | 200 mW at 25°C - supports continuous regulation in low-power sensor interfaces without heatsinking |
| Zener Impedance (ZZT) | ≤90 Ω at 5 mA - maintains low AC ripple coupling during transient suppression in RF front-end bias networks |
| Leakage Current (IR) | ≤3 µA at 1.0 V reverse bias - minimizes standby current drain in battery-powered wearables |
| Capacitance (C) | 450 pF at 0 V, 1 MHz - compatible with signal integrity requirements in <10 MHz analog monitoring paths |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct placement on exposed I/O lines without external ESD diodes |
| Package | SOD−323 (1.7 × 1.25 × 0.9 mm) - fits 0402-footprint layouts with 0.65 mm pitch anode/cathode terminals |
Pinout & Package
SOD−323 surface-mount package with molded plastic case (Case 477, Style 1), cathode indicated by polarity band. Body dimensions: 1.7 mm × 1.25 mm × 0.9 mm; weight: 4.507 mg/unit; flammability rating UL 94 V−0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated node; sinks current when reverse voltage exceeds 4.3 V threshold |
| 2 (Anode) | Reference/ground terminal | Biased to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Steady-state power rating | 200 mW at 25°C - sufficient for biasing low-current op-amp references without thermal derating in handheld devices |
| Zener voltage tolerance | ±0.3 V (4.0–4.6 V) - enables accurate 3.3 V rail clamping without additional trimming components |
| Low profile height | 0.9 mm max - allows stacking under shields or placement beneath connectors in ultra-thin mobile PCBs |
| Pb-free plating option | Sn-only or Pb−Sn leads - meets RoHS/REACH compliance without sacrificing solder wetting performance |
| High ESD robustness | Class 3 (>16 kV HBM) - eliminates need for discrete ESD protection in USB Type-C CC line conditioning |
Applications
| Smartphone Power Rail Protection | USB Interface Voltage Clamping |
|---|---|
|
Use Scenario: Protecting 3.3 V LDO output against load-dump transients in cellular phone baseband IC power domains. IC Role / Device Role / Timing Role: Zener clamp placed between LDO output and ground to shunt surge energy above 4.3 V. Use Value: Prevents latch-up in downstream PMICs by limiting overvoltage to <4.6 V with sub-µA leakage at nominal rail. |
Use Scenario: Stabilizing CC line voltage in USB Type-C receptacles during plug insertion/removal events. IC Role / Device Role / Timing Role: Bidirectional voltage limiter referenced to ground, absorbing ESD and contact bounce spikes. Use Value: Maintains CC logic levels within USB spec (0–5.5 V) while surviving >16 kV HBM per IEC 61000-4-2. |
| IoT Sensor Node Reference | Wearable Battery Monitoring |
|
Use Scenario: Providing stable 4.3 V reference for ADC input scaling in compact environmental sensor modules. IC Role / Device Role / Timing Role: Precision voltage source feeding resistive divider network into SAR ADC reference pin. Use Value: Delivers ±0.3 V accuracy over −40°C to +85°C, enabling <1% full-scale error in temperature/humidity readings. |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider in hearable devices with 1.2 mm board thickness constraint. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) Zener in divider top leg to minimize signal loading on high-impedance sense node. Use Value: Reduces divider error contribution to <0.5% while occupying only 0402-equivalent board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 | Same 4.3 V nominal Zener, but 300 mW rating and SOD-323 package with 100 Ω ZZT @ 5 mA | Higher power margin suits higher-current bias networks; slightly higher impedance affects AC noise rejection | Select when >200 mW headroom is required and 100 Ω ZZT is acceptable for target frequency range |
| MMSZ4V3ET1G | Identical 4.3 V rating and SOD-123 package (2.7 × 1.4 × 1.0 mm); 500 mW rating, 100 Ω ZZT, 3 µA IR | Larger footprint increases board area by ~2.5×; higher power enables use in 5 V rail clamping with derated thermal margin | Choose when layout allows SOD-123 and higher power handling is prioritized over miniaturization |
Compared with BZX384-B4V3,115 and MMSZ4V3ET1G, the MM3Z4V3T1 offers the smallest footprint (SOD−323) and lowest profile (0.9 mm) among 4.3 V Zeners, making it optimal for ultra-dense portable PCBs where 200 mW dissipation suffices and ESD robustness (>16 kV HBM) is mandatory.
Availability
MM3Z4V3T1 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface voltage clamping, and IoT sensor node reference applications requiring stable component supply, RoHS-compliant sourcing, and traceable lot-level documentation.
Supply support for MM3Z4V3T1 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, cloud, and consumer markets.
The MM3Z4V3T1 belongs to the MM3ZxxxT1 series of 200 mW Zener regulators designed specifically for space-constrained, high-reliability portable electronics where low profile, high ESD tolerance, and tight voltage tolerance are essential.
FAQ
What is the Zener voltage tolerance of MM3Z4V3T1?
The MM3Z4V3T1 has a guaranteed Zener voltage range of 4.0 V to 4.6 V at 5 mA test current (IZT), corresponding to a nominal 4.3 V with ±0.3 V absolute tolerance. This specification is validated per the onsemi datasheet Rev. 7 and applies across the full operating temperature range of −65°C to +150°C junction temperature. The MM3Z4V3T1 achieves this tolerance without external trimming.
Does MM3Z4V3T1 support Pb-free soldering processes?
Yes, MM3Z4V3T1 is offered in a Pb-free version denoted by the "G" suffix (MM3Z4V3T1G), with Sn-only lead plating compatible with standard reflow profiles up to 260°C for 10 seconds. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for both wave and reflow soldering per onsemi's Soldering and Mounting Techniques Reference Manual.
What is the maximum Zener impedance of MM3Z4V3T1 and at what condition?
The MM3Z4V3T1 has a maximum Zener impedance (ZZT) of 90 Ω, measured at the specified test current IZT = 5 mA and ambient temperature TA = 25°C. This value reflects dynamic resistance under DC bias and directly impacts AC ripple rejection capability-lower ZZT enables tighter regulation during fast transients in power supply feedback paths.
Can MM3Z4V3T1 be used in place of a 3.3 V Zener diode?
No, MM3Z4V3T1 is not a substitute for a 3.3 V Zener diode because its nominal Zener voltage is 4.3 V with a minimum of 4.0 V-exceeding the 3.3 V rail by ≥0.7 V. Using MM3Z4V3T1 for 3.3 V clamping would result in insufficient conduction during overvoltage events. For 3.3 V regulation, consider MM3Z3V3T1 (3.1–3.5 V range) instead.
What is the leakage current specification for MM3Z4V3T1 at 1.0 V reverse bias?
The MM3Z4V3T1 specifies a maximum reverse leakage current (IR) of 3 µA at VR = 1.0 V and TA = 25°C. This low leakage ensures minimal parasitic current draw in battery-powered applications such as Bluetooth LE sensors, where standby current budgets are typically below 10 µA. The value is confirmed in the Electrical Characteristics table on page 2 of the official datasheet.
MM3Z4V3T1 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):
- 4.3 V
- Tolerance:
- ±7%
- 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
MM3Z4V3T1 FAQ
1.How can I place an order for MM3Z4V3T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z4V3T1 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 MM3Z4V3T1 reliable?
The price and inventory of MM3Z4V3T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z4V3T1 is usually 5 days.
3.What payment methods are accepted for MM3Z4V3T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z4V3T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z4V3T1?
MM3Z4V3T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z4V3T1 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 MM3Z4V3T1?
For technical support, including MM3Z4V3T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z4V3T1 requirements.
6.How does Aetrix verify that MM3Z4V3T1 is sourced from the original manufacturer or authorized distributors?
All MM3Z4V3T1 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 MM3Z4V3T1 meets industry standards.
7.What is the process for return or replacement of MM3Z4V3T1?
All MM3Z4V3T1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z4V3T1, 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 MM3Z4V3T1 part is unused and in its original packaging.
Return procedure for MM3Z4V3T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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