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onsemi MM3Z9V1ST1
- Part No.:
- MM3Z9V1ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z9V1ST1.pdf
- Description:
- DIODE ZENER 9.1V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,023
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Product details
Overview
MM3Z9V1ST1 from onsemi is a 9.1 V ±3.8% tolerance Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation at 25°C, with 160 Ω maximum Zener impedance at 5 mA test current and 0.5 μA reverse leakage at 7.0 V. It provides precision voltage regulation in space-constrained applications such as smartphone power rail clamping and portable device overvoltage protection.
For engineers reviewing the MM3Z9V1ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 9.1 V nominal Zener voltage, low 130 pF capacitance at 0 V bias, Class 3 ESD rating (>16 kV HBM), SOD−323 footprint compatibility, and Pb-free availability (G suffix).
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 5 mA test current (IZT) and 0.5 mA knee current (IZK) define two critical operating points for regulation accuracy and low-current stability.
The device exhibits a positive temperature coefficient of +3.8 mV/°C at IZT = 5 mA, enabling predictable drift compensation in multi-device bias networks. Its 635 °C/W junction-to-ambient thermal resistance and −65°C to +150°C operating range support reliable performance in compact, thermally dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.85–9.23 V at 5 mA - defines precise clamping threshold for 9 V rail protection |
| Power Dissipation PD | 200 mW at 25°C - supports continuous regulation in low-power sensor interfaces |
| Zener Impedance ZZT | 160 Ω max at 5 mA - ensures minimal output voltage variation under dynamic load transients |
| Reverse Leakage IR | 0.5 μA max at 7.0 V - guarantees negligible standby current in battery-powered systems |
| Capacitance C | 130 pF max at 0 V, 1 MHz - enables use in high-frequency signal line protection without signal degradation |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for robust handling in assembly and field operation |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint ideal for ultra-dense mobile PCBs |
Pinout & Package
SOD−323 surface-mount package with cathode indicated by band; 2-terminal device with no internal circuitry beyond the Zener junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 | Anode | Connected to ground or lower-potential reference; completes conduction path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ Tolerance | ±3.8% at 9.1 V - reduces need for post-production calibration in voltage reference circuits |
| Pb-Free Construction | G-suffix variant available - satisfies RoHS compliance and lead-free soldering requirements (260°C/10 s) |
| Low Capacitance | 130 pF at 0 V - preserves signal integrity in RF front-end ESD protection paths |
| High ESD Robustness | Class 3 per HBM (>16 kV) - eliminates need for external ESD diodes in handheld interface lines |
| Miniature Outline | 1.7 mm × 1.25 mm body - enables placement adjacent to IC pins without routing detours |
Applications
| Smartphone Power Rail Clamping | USB Interface Line Protection |
|---|---|
|
Use Scenario: Clamping 9 V supply rails in LTE modem modules against transient surges during hot-plug events. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to clamp voltage excursions above 9.1 V. Use Value: Prevents latch-up in baseband processors by limiting rail overshoot to <9.3 V with 160 Ω dynamic impedance. |
Use Scenario: Protecting USB 2.0 D+ and D− lines from ESD strikes in portable accessories. IC Role / Device Role / Timing Role: Low-capacitance Zener providing bidirectional clamping to ground and VBUS. Use Value: Maintains <130 pF loading to preserve 480 Mbps data eye integrity while surviving >16 kV HBM strikes. |
| IoT Sensor Node Reference | Wearable Battery Monitoring |
|
Use Scenario: Generating stable 9.1 V reference for ADC biasing in LPWAN environmental sensors. IC Role / Device Role / Timing Role: Precision Zener supplying low-drift reference voltage to analog front-end. Use Value: Delivers ±3.8% initial accuracy and +3.8 mV/°C TC for predictable offset correction across −40°C to +85°C. |
Use Scenario: Monitoring Li-ion cell voltage in fitness trackers using resistive divider with Zener-stabilized bias. IC Role / Device Role / Timing Role: Shunt regulator establishing known reference point for voltage scaling network. Use Value: Draws only 0.5 μA leakage at 7 V, extending battery life beyond 12 months in always-on monitoring mode. |
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-B9V1,115 | 9.1 V ±5%, 300 mW rating, SOD-323, 150 Ω ZZT @ 5 mA | Higher power allows greater surge energy absorption but larger voltage tolerance reduces reference accuracy | Select when higher surge immunity is prioritized over tight regulation; verify layout thermal relief for 300 mW derating |
| MMSZ5240B-TP | 9.1 V ±5%, 500 mW rating, SOD-123, 200 Ω ZZT @ 20 mA | Larger SOD-123 package increases board area; higher test current shifts regulation point | Choose for legacy designs using SOD-123 footprints or where higher continuous power is required despite larger size |
Compared with MM3Z9V1ST1, BZX384-B9V1 offers higher surge margin but looser tolerance, while MMSZ5240B-TP trades miniaturization for thermal headroom-making MM3Z9V1ST1 optimal for new space- and accuracy-critical designs.
Availability
MM3Z9V1ST1 is available at Aetrix Electronics and suitable for smartphone power management, USB interface protection, and wearable battery monitoring requiring stable component supply and full traceability.
Supply support for MM3Z9V1ST1 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM3ZxxxST1 series was designed specifically for high-density portable electronics requiring miniature, high-reliability Zener regulation with tight voltage tolerance and robust ESD immunity.
FAQ
What is the nominal Zener voltage and tolerance of MM3Z9V1ST1?
The MM3Z9V1ST1 has a nominal Zener voltage of 9.1 V with a tolerance of ±3.8%, specified as 8.85 V minimum to 9.23 V maximum at 5 mA test current. This tight tolerance enables accurate voltage clamping without trimming in production, making MM3Z9V1ST1 suitable for precision reference and protection circuits where ±0.35 V deviation is acceptable.
Does MM3Z9V1ST1 support lead-free soldering processes?
Yes, MM3Z9V1ST1 is available in Pb-free packaging (denoted by the "G" suffix, e.g., MM3Z9V1ST1G) and qualified for reflow soldering at 260°C for 10 seconds per JEDEC J-STD-020. The device uses Sn-only plating and complies with RoHS Directive 2011/65/EU, ensuring full compatibility with modern lead-free assembly lines without compromising thermal reliability.
What is the maximum reverse leakage current for MM3Z9V1ST1 and at what voltage is it specified?
The MM3Z9V1ST1 specifies a maximum reverse leakage current (IR) of 0.5 μA at VR = 7.0 V and TA = 25°C. This low leakage ensures minimal quiescent current draw in battery-powered applications, directly supporting multi-year operation in always-on IoT sensors and wearables where standby power budget is constrained to sub-microamp levels.
How does the temperature coefficient affect MM3Z9V1ST1's performance across operating temperature ranges?
MM3Z9V1ST1 has a temperature coefficient of +3.8 mV/°C at IZT = 5 mA, indicating its Zener voltage increases linearly with temperature. This predictable positive drift allows designers to compensate for thermal effects in reference networks-for example, pairing with negative-TC components-or to anticipate worst-case voltage shift of ~0.4 V over a −40°C to +85°C range, which must be accounted for in safety margin calculations for MM3Z9V1ST1-based clamping circuits.
Can MM3Z9V1ST1 be used for ESD protection on high-speed data lines like USB 2.0?
Yes, MM3Z9V1ST1 is suitable for ESD protection on USB 2.0 lines due to its 130 pF capacitance at 0 V bias and Class 3 (>16 kV HBM) ESD rating. Its low capacitance avoids signal distortion at 480 Mbps, and its fast Zener response clamps transients within nanoseconds. However, designers must confirm layout parasitics and ensure the 9.1 V clamping level aligns with the protected IC's absolute maximum ratings before finalizing MM3Z9V1ST1 placement.
MM3Z9V1ST1 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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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
MM3Z9V1ST1 FAQ
1.How can I place an order for MM3Z9V1ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z9V1ST1 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 MM3Z9V1ST1 reliable?
The price and inventory of MM3Z9V1ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z9V1ST1 is usually 5 days.
3.What payment methods are accepted for MM3Z9V1ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z9V1ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z9V1ST1?
MM3Z9V1ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z9V1ST1 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 MM3Z9V1ST1?
For technical support, including MM3Z9V1ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z9V1ST1 requirements.
6.How does Aetrix verify that MM3Z9V1ST1 is sourced from the original manufacturer or authorized distributors?
All MM3Z9V1ST1 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 MM3Z9V1ST1 meets industry standards.
7.What is the process for return or replacement of MM3Z9V1ST1?
All MM3Z9V1ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z9V1ST1, 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 MM3Z9V1ST1 part is unused and in its original packaging.
Return procedure for MM3Z9V1ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z9V1ST1 Tags
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