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onsemi MMSZ2V7ET1G
- Part No.:
- MMSZ2V7ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMSZ2V7ET1G.pdf
- Description:
- DIODE ZENER 500MW 2.7V SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:69,000
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Product details
Overview
MMSZ2V7ET1G from onsemi is a 2.7 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 100 Ω dynamic impedance at 5 mA test current and 20 µA reverse leakage at 1.9 V, used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the MMSZ2V7ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, ESD robustness (Class 3 HBM >16 kV), and compatibility with automated SMT assembly on high-density PCBs.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction, with nominal Zener voltage specified at IZT = 5 mA and pulse width = 1 ms. Its temperature coefficient is negative below ~5 V, resulting in −2.5 mV/°C typical drift near 2.7 V.
The SOD-123 package enables surface-mount integration with cathode polarity band marking, 260 °C soldering tolerance for 10 s, and UL 94 V-0 flammability rating. Thermal resistance from junction-to-lead is 150 °C/W, supporting stable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.57–2.84 V at IZT = 5 mA; ensures stable 2.7 V reference within ±5% tolerance under nominal bias. |
| Power Dissipation (PD) | 500 mW at TL = 75 °C on FR-5 board; defines maximum continuous DC power before thermal derating begins. |
| Zener Impedance (ZZT) | 100 Ω max at IZT = 5 mA, 1 kHz AC; limits output voltage variation under dynamic load changes. |
| Reverse Leakage (IR) | 20 µA max at VR = 1.9 V; guarantees minimal quiescent current draw in standby voltage-clamp circuits. |
| ESD Rating | Class 3 (>16 kV) per HBM; protects against electrostatic discharge during handling and board assembly. |
| Junction Temp Range | −55 °C to +150 °C; supports operation in automotive under-hood and industrial control 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output 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 |
|---|---|
| Automated Assembly Optimized | SOD-123 footprint matches standard pick-and-place tooling and reflow profiles for high-yield SMT production. |
| Pb-Free Construction | RoHS-compliant lead-free terminations with compatible solder wetting and intermetallic formation. |
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and body electronics. |
| High Surge Withstand | 225 W nonrepetitive peak power (8 × 20 µs pulse) enables transient overvoltage suppression without failure. |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 3.3 V-powered pressure or temperature transducers. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise 2.7 V reference for ADC reference buffers and analog front-end gain setting. Use Value: Maintains <±10 mV output deviation across −40 °C to +85 °C ambient due to predictable negative TC and low ZZT. | Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Low-capacitance (<5 pF at 0 V bias) shunt protector diverting surge energy before it reaches downstream USB controller ICs. Use Value: Limits clamped voltage to ≤2.84 V during 1 kV HBM ESD event, preserving USB PHY integrity without signal distortion. |
| Low-Power IoT Node Voltage Reference | Microcontroller Reset Circuit Clamp |
Use Scenario: Generating stable reference for battery-monitoring ADC in coin-cell-powered BLE sensors. IC Role / Device Role / Timing Role: Zener-based reference source feeding internal ADC reference input, replacing higher-quiescent LDOs. Use Value: Draws only 20 µA leakage at 1.9 V, extending shelf life of CR2032-powered devices beyond 5 years. | Use Scenario: Preventing false resets caused by supply rail undershoot during brown-out conditions in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Shunt clamp holding reset pin above logic-high threshold (typically 0.7 × VDD) during VDD dip. Use Value: Activates at 2.57 V minimum, ensuring reliable reset assertion down to 2.7 V supply while avoiding premature release. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C2V7 | 2.7 V ±5%, 300 mW rating, SOD-323 package, 120 Ω ZZT at 5 mA | Lower power rating and smaller package reduce thermal margin in sustained clamp duty cycles | Select when board space is constrained and peak power <150 mW; verify layout thermal relief for SOD-323 |
| MMBZ5222BS | 2.7 V ±5%, 200 mW rating, SOT-23 package, 150 Ω ZZT at 20 mA | Higher ZZT and lower power limit performance in precision reference roles requiring low noise | Prefer for cost-sensitive consumer designs where 200 mW derating suffices and SOT-23 footprint is already standardized |
Compared with BZX584C2V7 and MMBZ5222BS, MMSZ2V7ET1G delivers superior thermal capability (500 mW vs. ≤300 mW), lower dynamic impedance (100 Ω vs. ≥120 Ω), and AEC-Q101 qualification-making it optimal for automotive and industrial applications demanding long-term reliability under thermal stress.
Availability
MMSZ2V7ET1G is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, and low-power IoT voltage reference applications requiring stable component supply across extended product lifecycles.
Supply support for MMSZ2V7ET1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZxxxET1G series was designed specifically for compact, high-reliability Zener regulation in space-constrained SMT designs-emphasizing AEC-Q101 compliance, Pb-free manufacturability, and consistent parametric performance across temperature.
FAQ
What is the Zener voltage tolerance of MMSZ2V7ET1G?
MMSZ2V7ET1G has a nominal Zener voltage of 2.7 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 2.57 V and 2.84 V when tested at IZT = 5 mA and pulse width = 1 ms. This tolerance is guaranteed across the full operating temperature range of −55 °C to +150 °C, and MMSZ2V7ET1G maintains this specification under standard JEDEC test conditions.
Is MMSZ2V7ET1G still in active production?
No, MMSZ2V7ET1G is marked as discontinued per the official onsemi datasheet revision dated February 2026. While Aetrix Electronics maintains legacy inventory and offers lifecycle support, new design-ins should consider qualified alternatives such as BZX584C2V7 or MMBZ5222BS-and MMSZ2V7ET1G remains available for existing production continuity programs.
What is the maximum reverse leakage current for MMSZ2V7ET1G?
The maximum reverse leakage current for MMSZ2V7ET1G is 20 µA at VR = 1.9 V and TA = 25 °C. This value is measured under standardized test conditions and reflects worst-case off-state conduction, critical for ultra-low-power applications like battery-backed sensors where MMSZ2V7ET1G serves as a precision clamp or reference element.
Can MMSZ2V7ET1G be used in automotive applications?
Yes, MMSZ2V7ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules, infotainment power rails, and sensor interface protection. Its SOD-123 package, −55 °C to +150 °C operating range, and Class 3 HBM ESD rating align with automotive reliability requirements-and MMSZ2V7ET1G is explicitly listed in onsemi's qualified automotive-grade Zener portfolio.
What is the thermal resistance from junction to ambient for MMSZ2V7ET1G?
The thermal resistance from junction to ambient (RJA) for MMSZ2V7ET1G is 340 °C/W when mounted on an FR-5 board per the onsemi recommended footprint. This value determines how much the junction temperature rises above ambient per milliwatt of dissipated power-and MMSZ2V7ET1G uses this parameter to define its 500 mW power rating at 75 °C lead temperature, with linear derating above that point.
MMSZ2V7ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMSZ2V7ET1G FAQ
1.How can I place an order for MMSZ2V7ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ2V7ET1G 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 MMSZ2V7ET1G reliable?
The price and inventory of MMSZ2V7ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ2V7ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ2V7ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ2V7ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ2V7ET1G?
MMSZ2V7ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ2V7ET1G 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 MMSZ2V7ET1G?
For technical support, including MMSZ2V7ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ2V7ET1G requirements.
6.How does Aetrix verify that MMSZ2V7ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ2V7ET1G 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 MMSZ2V7ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ2V7ET1G?
All MMSZ2V7ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ2V7ET1G, 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 MMSZ2V7ET1G part is unused and in its original packaging.
Return procedure for MMSZ2V7ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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