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onsemi MM5Z9V1ST1G
- Part No.:
- MM5Z9V1ST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z9V1ST1G.pdf
- Description:
- DIODE ZENER 9.1V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,106
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Product details
Overview
MM5Z9V1ST1G from onsemi is a 9.1 V ±3.8% tolerance Zener diode in SOD-523 package, rated for 500 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 6.0 V. It delivers precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MM5Z9V1ST1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 3.8% VZ tolerance, 130 pF capacitance at 0 V/1 MHz, −65 °C to +150 °C operating junction temperature range, ESD rating >16 kV (HBM), and Pb-free RoHS-compliant SOD-523 footprint.
Technical Context
This Zener diode operates in reverse breakdown to clamp or regulate voltage with stable reference behavior across temperature. Its 5 mA test current (IZT) and 1.0 mA knee current (IZK) define low-current regulation capability, while the 160 Ω dynamic impedance (ZZT) ensures predictable voltage deviation under load variation.
The device uses a void-free thermosetting plastic case with 100% matte tin lead finish, qualified to MSL 1 and rated for 260 °C reflow. Its 1.20 mm × 0.80 mm × 0.60 mm outline and cathode/anode polarity marking support high-density automated assembly on FR-4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.85 V min / 9.23 V max at 5 mA - defines regulated output window for precision clamping |
| Tolerance | ±3.8% - enables tighter system-level voltage margining than standard 5% Zeners |
| Power Rating | 500 mW @ 25 °C - supports continuous regulation in compact handheld PCB layouts |
| Zener Impedance | 160 Ω max @ 5 mA - limits output voltage shift under dynamic load changes |
| Reverse Leakage | 0.5 µA max @ 6.0 V - ensures minimal standby current in battery-powered systems |
| Capacitance | 130 pF max @ 0 V, 1 MHz - constrains high-frequency noise coupling in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling without external protection in consumer assembly lines |
Pinout & Package
Package: SOD-523 (Case 502, Style 1), 1.20 mm × 0.80 mm × 0.60 mm body, cathode marked by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Unbanded End) | Anode | Connected to circuit ground or lower-potential reference; completes bias path |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±3.8% at 5 mA enables accurate overvoltage threshold setting without calibration |
| Low-profile SOD-523 | 0.60 mm height allows placement beneath connectors or near BGA packages |
| High ESD immunity | >16 kV HBM eliminates need for discrete ESD diodes in front-end protection |
| Pb-free & RoHS | 100% matte Sn finish ensures compatibility with lead-free reflow and environmental compliance |
Applications
| Smartphone Power Rail Clamping | USB-C Port Overvoltage Protection |
|---|---|
Use Scenario: Protects 5 V USB power input from transient surges during hot-plug events. IC Role / Device Role / Timing Role: Zener clamping element placed between VBUS and GND to shunt excess energy. Use Value: 9.1 V breakdown prevents damage to downstream USB-PD controllers rated for ≤6.5 V absolute max. | Use Scenario: Guards microcontroller I/O pins connected to USB-C CC lines against miswired adapter voltages. IC Role / Device Role / Timing Role: Standby voltage reference that conducts only during overvoltage fault conditions. Use Value: 0.5 µA leakage at 6 V preserves battery life in always-on USB detection circuits. |
| Wearable Sensor Bias Regulation | Industrial IoT Node Reference Stabilization |
Use Scenario: Provides stable 9.1 V bias for MEMS microphone preamplifiers in hearables. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant headroom for analog signal chain. Use Value: 160 Ω ZZT ensures <±20 mV output shift across 100 µA–1 mA load variations. | Use Scenario: Stabilizes ADC reference voltage in battery-operated edge sensors exposed to −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Temperature-compensated voltage clamp referenced to local ground plane. Use Value: −65 °C to +150 °C TJ range guarantees regulation integrity across extended industrial thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C9V1 | Same 9.1 V nominal, ±5% tolerance, SOD-523, but 350 mW rating and 200 Ω ZZT | Lower power handling reduces margin in sustained overvoltage events | Select when cost sensitivity outweighs need for 500 mW derating headroom |
| MMSZ5240B | 9.1 V nominal, ±5%, SOD-123, 500 mW, but 1000 Ω ZZT and no Class 3 ESD rating | Larger 2.7 mm × 1.6 mm footprint increases board area by 4.3× | Choose only if legacy SOD-123 layout reuse is mandatory and ESD robustness is secondary |
Compared with BZX584C9V1 and MMSZ5240B, MM5Z9V1ST1G offers superior voltage accuracy (±3.8% vs. ±5%), lower dynamic impedance (160 Ω vs. ≥200 Ω), and guaranteed >16 kV HBM ESD protection-critical for modern portable designs where layout density and field reliability are prioritized.
Availability
MM5Z9V1ST1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, USB-C port overvoltage protection, and wearable sensor bias regulation requiring stable component supply across high-mix production runs.
Supply support for MM5Z9V1ST1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5ZxxxST1G series targets ultra-compact voltage regulation in portable electronics, emphasizing tight tolerance, high ESD resilience, and minimal footprint for next-generation handheld and wearable devices.
FAQ
What is the exact Zener voltage range for MM5Z9V1ST1G at 5 mA test current?
The MM5Z9V1ST1G has a specified Zener voltage range of 8.85 V minimum to 9.23 V maximum when tested at 5 mA (IZT). This 3.8% tolerance window is tighter than standard Zener diodes and is validated per onsemi's April 2026 Rev. 15 datasheet. The MM5Z9V1ST1G achieves this precision through process-controlled doping and post-trim testing.
Does MM5Z9V1ST1G support lead-free reflow soldering, and what is its peak temperature rating?
Yes, MM5Z9V1ST1G is Pb-free and RoHS compliant with 100% matte tin lead finish, qualified for lead-free reflow up to 260 °C peak temperature. It meets JEDEC J-STD-020 MSL 1 requirements, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. This makes MM5Z9V1ST1G suitable for high-volume automated manufacturing lines using standard SAC305 profiles.
What is the maximum reverse leakage current for MM5Z9V1ST1G, and at what voltage is it measured?
The MM5Z9V1ST1G exhibits a maximum reverse leakage current of 0.5 µA when measured at 6.0 V reverse voltage (VR). This value is specified in the Electrical Characteristics table of the official onsemi datasheet and reflects low standby power consumption critical for battery-powered applications. The MM5Z9V1ST1G maintains this performance across its full operating temperature range.
Can MM5Z9V1ST1G be used as a substitute for older Zener diodes like 1N4739A in new designs?
No, MM5Z9V1ST1G is not a drop-in replacement for 1N4739A due to fundamental differences: MM5Z9V1ST1G is a 500 mW SOD-523 surface-mount device, whereas 1N4739A is a 1 W DO-41 through-hole part. Their footprints, power handling, thermal paths, and mounting methods are incompatible. Redesign is required to use MM5Z9V1ST1G, but its smaller size and tighter tolerance may justify layout revision in space-constrained applications.
What is the Zener impedance of MM5Z9V1ST1G, and why does it matter for circuit stability?
The MM5Z9V1ST1G has a maximum Zener impedance (ZZT) of 160 Ω at 5 mA test current. This parameter quantifies how much the output voltage varies with changing load current - lower ZZT means better regulation. In practice, this allows MM5Z9V1ST1G to maintain voltage stability within ±20 mV across 100 µA–1 mA load swings, making it suitable for precision biasing in analog sensor interfaces where ripple rejection matters.
MM5Z9V1ST1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 500 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-523
MM5Z9V1ST1G FAQ
1.How can I place an order for MM5Z9V1ST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z9V1ST1G 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 MM5Z9V1ST1G reliable?
The price and inventory of MM5Z9V1ST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z9V1ST1G is usually 5 days.
3.What payment methods are accepted for MM5Z9V1ST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z9V1ST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z9V1ST1G?
MM5Z9V1ST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z9V1ST1G 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 MM5Z9V1ST1G?
For technical support, including MM5Z9V1ST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z9V1ST1G requirements.
6.How does Aetrix verify that MM5Z9V1ST1G is sourced from the original manufacturer or authorized distributors?
All MM5Z9V1ST1G 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 MM5Z9V1ST1G meets industry standards.
7.What is the process for return or replacement of MM5Z9V1ST1G?
All MM5Z9V1ST1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z9V1ST1G, 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 MM5Z9V1ST1G part is unused and in its original packaging.
Return procedure for MM5Z9V1ST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z9V1ST1G Tags
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