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onsemi MMSZ5V1ET1
- Part No.:
- MMSZ5V1ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5V1ET1.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
MMSZ5V1ET1 from onsemi is a 500 mW surface-mount Zener diode in SOD-123 package, providing precise 5.1 V ±5% reverse breakdown regulation at 5 mA test current, with dynamic impedance of 60 Ω and leakage current ≤2 µA at 4.2 V, used for voltage reference and overvoltage protection in power supply rails and sensor interface circuits.
For engineers reviewing the MMSZ5V1ET1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (RJA = 340 °C/W), peak surge capability (225 W), AEC-Q101 qualification, and SOD-123 footprint compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference by maintaining stable reverse conduction above its specified Zener voltage (VZ = 4.85–5.36 V). It exhibits low dynamic impedance (ZZT = 60 Ω @ IZT = 5 mA) and tight voltage tolerance (±5%), enabling accurate clamping in low-power biasing and feedback networks.
Designed for FR-5 board mounting, it delivers 500 mW continuous dissipation at TL = 75 °C, derating linearly above that temperature (6.7 mW/°C), with junction-to-ambient thermal resistance of 340 °C/W and ESD robustness exceeding 16 kV per Human Body Model.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85–5.36 V @ IZT = 5 mA - defines regulated output range under nominal test conditions |
| Power Dissipation (PD) | 500 mW on FR-5 board @ TL = 75 °C - sets maximum steady-state thermal load in standard PCB layout |
| Dynamic Impedance (ZZT) | 60 Ω @ IZT = 5 mA - determines regulation accuracy under varying load current |
| Reverse Leakage (IR) | ≤2 µA @ VR = 4.2 V - ensures minimal quiescent current in standby or high-impedance sensing nodes |
| Peak Surge Power (PPk) | 225 W @ 8 × 20 µs pulse - supports transient overvoltage suppression without failure |
| Thermal Resistance (RJA) | 340 °C/W - quantifies temperature rise per watt dissipated in still air, critical for thermal design margin |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling and operation in unshielded industrial environments |
Pinout & Package
SOD-123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band, rated for 260 °C soldering (10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress testing |
| Low Dynamic Impedance | 60 Ω enables <10 mV output variation across 1–10 mA load current changes in reference applications |
| Pb-Free Construction | RoHS-compliant SOD-123 package with lead-free terminations compatible with modern reflow profiles |
| High ESD Robustness | Class 3 HBM (>16 kV) eliminates need for external ESD protection in low-voltage sensor interfaces |
| Optimized for Automated Assembly | Standardized SOD-123 footprint and marking support high-yield pick-and-place and AOI inspection |
Applications
| Industrial Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog front-end amplifiers in temperature and pressure transducers. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precision bias point for op-amp input stages. Use Value: ±5% VZ tolerance and 60 Ω ZZT ensure <±15 mV drift across operating current range, improving ADC measurement linearity. |
Use Scenario: Clamping transient surges on USB VBUS line to protect downstream USB controller ICs. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting ESD or load-dump energy before reaching sensitive logic. Use Value: 225 W peak surge rating and 16 kV HBM withstand capability suppress 8/20 µs transients without degradation. |
| Automotive Cabin Control Panel | IoT Node Power Rail Stabilization |
Use Scenario: Regulating 5.1 V supply for microcontroller reset circuitry and LED backlight drivers in HVAC control modules. IC Role / Device Role / Timing Role: Low-power voltage clamp ensuring clean reset signal generation during battery voltage fluctuations. Use Value: AEC-Q101 qualification guarantees operation from −55 °C to +150 °C and survival through automotive thermal cycling. |
Use Scenario: Stabilizing 5 V rail for BLE SoC and environmental sensors in battery-powered smart meters. IC Role / Device Role / Timing Role: Standby-mode voltage reference minimizing quiescent current while maintaining regulation readiness. Use Value: ≤2 µA leakage at 4.2 V preserves battery life over multi-year deployments without compromising turn-on response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1 | Same 5.1 V nominal Zener voltage but higher ZZT (90 Ω), lower surge rating (100 W), and no AEC-Q101 qualification | Targeted at commercial-grade portable electronics, not automotive or harsh-environment use | Select when cost sensitivity outweighs automotive qualification and surge performance requirements |
| MMSZ5221BT1G | Identical SOD-123 package and 5.1 V rating but tighter ±2% tolerance and lower ZZT (30 Ω), with same 500 mW rating | Preferred for high-precision references where regulation stability under variable load is critical | Choose when improved voltage accuracy and lower dynamic impedance justify potential cost premium |
Compared with MMSZ5V1ET1, BZX84-C5V1 offers lower cost but reduced ruggedness and qualification scope, while MMSZ5221BT1G provides superior regulation precision at the expense of wider availability and higher unit price.
Availability
MMSZ5V1ET1 is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port protection, and automotive cabin control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5V1ET1 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 is a global semiconductor supplier delivering energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZxxxET1G series was developed to provide AEC-Q101-qualified, high-reliability Zener diodes in compact SOD-123 packages for voltage regulation and transient protection in space-constrained automotive and industrial electronics.
FAQ
What is the Zener voltage tolerance for MMSZ5V1ET1?
The MMSZ5V1ET1 has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, resulting in a guaranteed reverse breakdown range of 4.85 V to 5.36 V when tested at IZT = 5 mA and TA = 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet.
Is MMSZ5V1ET1 qualified for automotive applications?
Yes, MMSZ5V1ET1 is AEC-Q101 qualified and PPAP capable, meaning it has undergone rigorous stress testing-including temperature cycling, humidity, and mechanical shock-to meet automotive reliability standards. Its operating junction temperature range of −55 °C to +150 °C further supports under-hood and cabin module deployment.
What is the maximum continuous power dissipation for MMSZ5V1ET1 on a standard PCB?
MMSZ5V1ET1 delivers 500 mW continuous power dissipation on an FR-5 board at lead temperature (TL) = 75 °C, derating linearly at 6.7 mW/°C above that temperature. This rating assumes the ON Semiconductor-recommended minimum footprint and is validated per JEDEC JESD51-3 thermal test conditions.
Does MMSZ5V1ET1 have ESD protection built-in?
Yes, MMSZ5V1ET1 features an ESD rating of Class 3 (>16 kV) per the Human Body Model, verified per ANSI/ESDA/JEDEC JS-001. This level of robustness eliminates the need for additional discrete ESD protection in many low-voltage interface applications such as sensor signal conditioning and microcontroller I/O clamping.
What package type and dimensions does MMSZ5V1ET1 use?
MMSZ5V1ET1 uses the SOD-123 surface-mount package (Case 425, Style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. The cathode is marked by a band on terminal 1, and the device is Pb-free with RoHS-compliant terminations, supporting standard reflow soldering up to 260 °C for 10 seconds.
MMSZ5V1ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5V1ET1 FAQ
1.How can I place an order for MMSZ5V1ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5V1ET1 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 MMSZ5V1ET1 reliable?
The price and inventory of MMSZ5V1ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5V1ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ5V1ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5V1ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5V1ET1?
MMSZ5V1ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5V1ET1 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 MMSZ5V1ET1?
For technical support, including MMSZ5V1ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5V1ET1 requirements.
6.How does Aetrix verify that MMSZ5V1ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5V1ET1 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 MMSZ5V1ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ5V1ET1?
All MMSZ5V1ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5V1ET1, 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 MMSZ5V1ET1 part is unused and in its original packaging.
Return procedure for MMSZ5V1ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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