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onsemi MM3Z5V6ST1
- Part No.:
- MM3Z5V6ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z5V6ST1.pdf
- Description:
- DIODE ZENER 5.6V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,637
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Product details
Overview
MM3Z5V6ST1 from onsemi is a 5.6 V ±2.5% tolerance Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation, with 40 Ω maximum Zener impedance at 5 mA test current and 1.0 μA reverse leakage at 4.5 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 MM3Z5V6ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 5.49–5.73 V Zener voltage window, low 200 mW thermal limit, SOD−323 footprint compatibility, and Class 3 ESD rating (>16 kV HBM) for robust transient immunity in handheld designs.
Technical Context
This Zener regulator operates in reverse breakdown mode to clamp voltage across sensitive circuit nodes. Its 5.6 V nominal Zener voltage is specified at 5 mA test current (IZT), with temperature coefficient of −2.0 mV/°C and dynamic impedance tightly controlled to ≤40 Ω at IZT - enabling stable reference performance under varying load conditions.
The device uses a void-free transfer-molded plastic case (Case 477, Style 1), cathode-indicated by band, and supports Pb−Sn or Sn-only plating. Thermal resistance is 635 °C/W junction-to-ambient on FR−5 board, requiring derating above 25°C at 1.5 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.49–5.73 V at 5 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 200 mW at 25°C - limits continuous energy handling in compact PCB layouts |
| Zener Impedance (ZZT) | ≤40 Ω at IZT = 5 mA - ensures minimal voltage shift under dynamic load changes |
| Reverse Leakage (IR) | ≤1.0 μA at VR = 4.5 V - guarantees low standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides inherent electrostatic robustness without external protection |
| Capacitance (C) | ≤200 pF at 0 V, 1 MHz - minimizes signal distortion in high-frequency analog or RF bias networks |
| Package | SOD−323 (Case 477) - 1.7 × 1.25 × 0.9 mm footprint ideal for ultra-dense mobile PCBs |
Pinout & Package
SOD−323 surface-mount package with cathode marked by band; 2-terminal configuration: Pin 1 = Cathode, Pin 2 = Anode. Body dimensions: 1.70 mm × 1.25 mm × 0.90 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Connected to regulated output node | Accepts reverse-biased voltage; clamps when input exceeds VZ |
| 2 (Anode) | Ground or reference return path | Completes current path during Zener conduction; ties to system GND or bias rail |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±2.5% (5.49–5.73 V) enables accurate voltage thresholding without calibration |
| Low-profile SOD−323 | 0.9 mm height allows stacking under shields or beneath connectors in slim devices |
| High ESD immunity | Class 3 HBM (>16 kV) reduces need for supplemental TVS in front-end interfaces |
| Pb−Free option | MM3Z5V6ST1G variant available - meets RoHS and JEDEC J-STD-020 reflow standards |
Applications
| Smartphone Power Rail Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting 5 V USB VBUS-supplied subsystems from surge transients during hot-plug events. IC Role / Device Role / Timing Role: Zener voltage clamp placed between VBUS and GND to shunt excess energy before it reaches PMIC inputs. Use Value: 5.6 V breakdown precisely matches USB 2.0 specification margin, preventing false overvoltage shutdown while surviving >16 kV ESD. | Use Scenario: Limiting D+ and D− line voltages during ESD events in portable OTG accessories. IC Role / Device Role / Timing Role: Bidirectional clamping diode (anode tied to GND, cathode to signal line) suppressing fast transients. Use Value: 200 pF capacitance avoids signal integrity degradation at 480 Mbps, unlike higher-capacitance TVS devices. |
| Wearable Sensor Bias Reference | IoT Node Battery Monitoring |
Use Scenario: Providing stable 5.6 V reference for ADC biasing in compact health-monitoring patches. IC Role / Device Role / Timing Role: Precision Zener used as shunt reference in low-current divider network feeding SAR ADC reference input. Use Value: −2.0 mV/°C tempco and <1 μA leakage ensure <0.5% reference drift across −20°C to +70°C operating range. | Use Scenario: Detecting end-of-charge voltage thresholds in single-cell Li-ion battery fuel gauges. IC Role / Device Role / Timing Role: Zener-based comparator input clamp ensuring consistent trip point despite supply ripple. Use Value: Tight 5.49–5.73 V window eliminates need for trimming resistors, reducing BOM count in cost-sensitive modules. |
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-B5V6,115 | Same 5.6 V nominal, ±2% tolerance; SOD-323 package; 300 mW rating | Higher power rating allows greater surge energy absorption but requires larger layout margin | Select when higher transient energy handling is required and board space permits thermal margin |
| MMSZ5232BT1G | 5.6 V nominal, ±5% tolerance; SOD-123 package; 500 mW rating | Larger SOD-123 footprint and looser tolerance reduce precision in reference applications | Choose for cost-sensitive industrial controls where tighter VZ tolerance is not critical |
Compared with BZX384-B5V6,115 and MMSZ5232BT1G, the MM3Z5V6ST1 offers superior voltage accuracy (±2.5% vs. ±2% or ±5%) in the smallest SOD−323 footprint, making it optimal for high-density consumer electronics where both precision and miniaturization are mandatory.
Availability
MM3Z5V6ST1 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB data line clamping, and wearable sensor bias reference applications requiring stable component supply and consistent Zener voltage performance across production batches.
Supply support for MM3Z5V6ST1 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 targets space-constrained portable electronics, offering tight-tolerance Zener regulation in the industry's smallest standard surface-mount package for voltage reference, overvoltage protection, and bias stabilization.
FAQ
What is the Zener voltage tolerance of MM3Z5V6ST1?
The MM3Z5V6ST1 has a Zener voltage tolerance of ±2.5%, specifying a minimum of 5.49 V and maximum of 5.73 V at 5 mA test current. This tight tolerance ensures predictable clamping behavior in precision voltage reference and protection circuits without post-manufacturing calibration.
Does MM3Z5V6ST1 support Pb−Free assembly processes?
Yes, the MM3Z5V6ST1G variant is Pb−Free and qualified for lead-free reflow soldering per JEDEC J-STD-020. The standard MM3Z5V6ST1 uses Pb−Sn plating but is also compatible with standard reflow profiles up to 260°C for 10 seconds, as specified in the datasheet.
What is the maximum reverse leakage current for MM3Z5V6ST1 at 4.5 V?
The MM3Z5V6ST1 exhibits a maximum reverse leakage current of 1.0 μA at VR = 4.5 V and TA = 25°C. This low leakage supports extended battery life in always-on wearable and IoT sensor nodes where quiescent current must remain sub-microampere.
Can MM3Z5V6ST1 be used in bidirectional ESD protection configurations?
No - MM3Z5V6ST1 is a unidirectional Zener diode optimized for reverse-bias clamping only. For bidirectional ESD protection, two MM3Z5V6ST1 devices must be connected anode-to-anode (back-to-back), or a dedicated bidirectional TVS like ESD9B5.0ST5G should be selected instead.
What is the thermal resistance junction-to-ambient for MM3Z5V6ST1 on FR−5 board?
The MM3Z5V6ST1 has a thermal resistance of 635 °C/W junction-to-ambient when mounted on an FR−5 board. This value assumes minimum pad design per datasheet Note 1 and requires derating by 1.5 mW/°C above 25°C ambient to maintain safe junction temperature within −65°C to +150°C range.
MM3Z5V6ST1 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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 1 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
MM3Z5V6ST1 FAQ
1.How can I place an order for MM3Z5V6ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z5V6ST1 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 MM3Z5V6ST1 reliable?
The price and inventory of MM3Z5V6ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z5V6ST1 is usually 5 days.
3.What payment methods are accepted for MM3Z5V6ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z5V6ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z5V6ST1?
MM3Z5V6ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z5V6ST1 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 MM3Z5V6ST1?
For technical support, including MM3Z5V6ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z5V6ST1 requirements.
6.How does Aetrix verify that MM3Z5V6ST1 is sourced from the original manufacturer or authorized distributors?
All MM3Z5V6ST1 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 MM3Z5V6ST1 meets industry standards.
7.What is the process for return or replacement of MM3Z5V6ST1?
All MM3Z5V6ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z5V6ST1, 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 MM3Z5V6ST1 part is unused and in its original packaging.
Return procedure for MM3Z5V6ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z5V6ST1 Tags
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