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onsemi MM3Z5V1ST1
- Part No.:
- MM3Z5V1ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z5V1ST1.pdf
- Description:
- DIODE ZENER 5.1V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
MM3Z5V1ST1 from onsemi is a 5.1 V ±2.4% tolerance Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation at 25°C, with 60 Ω maximum Zener impedance at 5 mA test current and 2.0 μA reverse leakage at 3.0 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the MM3Z5V1ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 5.1 V Zener voltage tolerance, low 225 pF capacitance at 0 V bias, Class 3 ESD rating (>16 kV HBM), and compatibility with high-density PCB layouts requiring minimal footprint (1.7 mm × 1.25 mm).
Technical Context
This Zener regulator operates in reverse breakdown mode to clamp transient overvoltage and stabilize reference nodes. Its 5.1 V nominal Zener voltage is specified at 5 mA test current (IZT), with temperature coefficient of −2.7 mV/°C and thermal resistance of 635°C/W enabling predictable behavior across −65°C to +150°C junction range.
The device features low dynamic impedance (60 Ω max at IZT) and tight voltage tolerance (±2.4%), making it suitable for feedback sensing in LDOs and voltage supervisors where stable reference accuracy is critical. Its SOD−323 package supports automated placement and reflow soldering at 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.98 V to 5.20 V at 5 mA - ensures precise 5.1 V regulation with ±2.4% tolerance for stable reference generation |
| Power Dissipation PD | 200 mW at 25°C - supports continuous operation in low-power portable systems without forced cooling |
| Zener Impedance ZZT | 60 Ω max at 5 mA - minimizes output voltage variation under load transients in feedback loops |
| Reverse Leakage IR | 2.0 μA max at 3.0 V - reduces quiescent current drain in battery-powered applications |
| Capacitance C | 225 pF max at 0 V, 1 MHz - enables use in high-frequency signal line clamping without excessive signal attenuation |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust protection against human-body model electrostatic discharge events |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint ideal for ultra-compact PCB designs |
Pinout & Package
SOD−323 surface-mount package with cathode indicated by polarity band; body dimensions 1.7 mm × 1.25 mm × 0.9 mm; lead finish Pb−Sn or Sn-only (Pb−Free option available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to regulated node or voltage reference point; polarity band identifies this terminal |
| 2 (Anode) | Ground or return path | Typically tied to system ground or common return; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±2.4% at 5.1 V - enables accurate voltage reference without external trimming |
| Low-profile SOD−323 package | 0.9 mm height - allows stacking under shields or placement in tight board cavities |
| High ESD robustness | Class 3 (>16 kV HBM) - eliminates need for additional ESD protection components on I/O lines |
| Stable temperature coefficient | −2.7 mV/°C - ensures predictable voltage drift over industrial temperature range |
| Pb−Free compliance | RoHS-compliant Sn-only plating - meets global environmental regulations without performance trade-offs |
Applications
| Smartphone Power Rail Protection | USB Interface Clamping |
|---|---|
Use Scenario: Protecting 5 V USB VBUS line from ESD and surge events in mobile accessories. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to shunt transients. Use Value: 225 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 data lines while providing >16 kV HBM protection. | Use Scenario: Stabilizing 5 V supply to USB PHY ICs during hot-plug insertion. IC Role / Device Role / Timing Role: Precision voltage reference for USB power delivery supervisor ICs. Use Value: ±2.4% tolerance ensures reliable detection of VBUS presence within USB specification limits (4.4–5.25 V). |
| Wearable Sensor Node Reference | IoT Edge Device LDO Feedback |
Use Scenario: Providing stable 5.1 V reference for ADCs in compact fitness trackers. IC Role / Device Role / Timing Role: Low-drift voltage reference source for analog front-end circuitry. Use Value: −2.7 mV/°C tempco maintains <±15 mV error across −20°C to +70°C operating range. | Use Scenario: Setting output voltage of adjustable LDOs in battery-powered gateways. IC Role / Device Role / Timing Role: Feedback divider reference element in LDO control loop. Use Value: 60 Ω dynamic impedance ensures minimal load-regulation error (<30 mV) under 10–100 mA output swings. |
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-B5V1,115 | Same 5.1 V nominal, ±2% tolerance, but 300 mW rating and SOD-323 package with different marking and thermal resistance (500°C/W) | Higher power handling supports higher surge currents; slightly tighter voltage tolerance | Select when transient energy absorption exceeds 200 mW capability of MM3Z5V1ST1 |
| MMSZ5231B-TP | 5.1 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package (larger footprint: 2.8 mm × 1.7 mm) | Lower cost and wider availability, but looser tolerance and larger PCB area requirement | Select for cost-sensitive industrial controls where ±5% regulation is acceptable and space is not constrained |
Compared with BZX384-B5V1,115 and MMSZ5231B-TP, the MM3Z5V1ST1 offers optimal balance of tight tolerance, ultra-compact size, and sufficient power for portable electronics-making it preferred where PCB real estate and reference accuracy are both critical.
Availability
MM3Z5V1ST1 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface clamping, and wearable sensor node reference applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for MM3Z5V1ST1 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 MM3ZxxxST1 series is designed specifically for precision voltage regulation in space-constrained portable electronics, emphasizing tight Zener tolerance, low capacitance, and high ESD robustness for modern handheld devices.
FAQ
What is the Zener voltage tolerance of MM3Z5V1ST1?
The MM3Z5V1ST1 has a Zener voltage tolerance of ±2.4%, specified as 4.98 V to 5.20 V at 5 mA test current (IZT). This tight tolerance enables reliable voltage reference generation in feedback circuits where accuracy directly impacts system performance. The MM3Z5V1ST1 achieves this via process-controlled doping and post-package screening, ensuring consistency across production lots without requiring external calibration.
Can MM3Z5V1ST1 be used in high-frequency signal line protection?
Yes, the MM3Z5V1ST1 is suitable for high-frequency signal line protection due to its 225 pF maximum capacitance at 0 V bias and 1 MHz test frequency. This low capacitance prevents significant signal attenuation or timing skew on interfaces such as USB 2.0 or I²C. The MM3Z5V1ST1's fast response to transients-enabled by its low dynamic impedance-makes it effective for clamping ESD events without disrupting signal integrity.
What is the maximum junction temperature for MM3Z5V1ST1?
The MM3Z5V1ST1 has a junction and storage temperature range of −65°C to +150°C. Its thermal resistance from junction-to-ambient is 635°C/W, meaning that at 200 mW power dissipation and 25°C ambient, the junction temperature rises approximately 127°C above ambient-well within safe operating limits. This allows the MM3Z5V1ST1 to function reliably in automotive cabin modules and industrial edge devices exposed to elevated ambient temperatures.
Is MM3Z5V1ST1 RoHS-compliant and lead-free?
Yes, the MM3Z5V1ST1 is RoHS-compliant and available in Pb−Free packaging with Sn-only plating. The "G" suffix in ordering codes (e.g., MM3Z5V1ST1G) explicitly denotes the Pb−Free version. Standard MM3Z5V1ST1 units may use Pb−Sn plating, but both variants meet JEDEC J-STD-020 moisture sensitivity level 1 requirements and support standard reflow profiles up to 260°C for 10 seconds.
How does the temperature coefficient affect MM3Z5V1ST1 performance?
The MM3Z5V1ST1 has a temperature coefficient of −2.7 mV/°C at 5 mA test current, meaning its Zener voltage decreases by 2.7 mV per degree Celsius rise in junction temperature. Over a −20°C to +70°C operating range, this results in a total drift of ±243 mV-within acceptable bounds for most portable electronics references. The MM3Z5V1ST1's predictable negative tempco allows designers to compensate in firmware or analog circuitry when ultra-stable references are required.
MM3Z5V1ST1 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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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
MM3Z5V1ST1 FAQ
1.How can I place an order for MM3Z5V1ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z5V1ST1 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 MM3Z5V1ST1 reliable?
The price and inventory of MM3Z5V1ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z5V1ST1 is usually 5 days.
3.What payment methods are accepted for MM3Z5V1ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z5V1ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z5V1ST1?
MM3Z5V1ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z5V1ST1 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 MM3Z5V1ST1?
For technical support, including MM3Z5V1ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z5V1ST1 requirements.
6.How does Aetrix verify that MM3Z5V1ST1 is sourced from the original manufacturer or authorized distributors?
All MM3Z5V1ST1 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 MM3Z5V1ST1 meets industry standards.
7.What is the process for return or replacement of MM3Z5V1ST1?
All MM3Z5V1ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z5V1ST1, 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 MM3Z5V1ST1 part is unused and in its original packaging.
Return procedure for MM3Z5V1ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z5V1ST1 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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