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onsemi MMSZ5223ET1
- Part No.:
- MMSZ5223ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5223ET1.pdf
- Description:
- DIODE ZENER 2.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,221
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Product details
Overview
MMSZ5223ET1 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 20 mA test current, 1300 Ω maximum dynamic impedance at IZT, and 0.25 µA leakage current at 75 V reverse bias - used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ5223ET1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode/anode terminal mapping, SOD-123 mechanical dimensions, and direct alternatives for voltage regulation in space-constrained PCBs.
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 2.7 V, designed for stable DC voltage clamping and reference generation in linear regulators, sensor biasing, and ADC reference circuits. Its 1300 Ω dynamic impedance at 20 mA ensures predictable regulation under moderate load variation.
Thermal performance is defined by 340 °C/W junction-to-ambient resistance and 150 °C/W junction-to-lead resistance, enabling reliable operation up to +150 °C junction temperature. The SOD-123 package supports automated placement and reflow soldering at 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.57–2.84 V at 20 mA - defines precise clamping threshold for 3.3 V rail monitoring or LDO feedback networks |
| Power Dissipation (PD) | 500 mW at TL = 75 °C - sets maximum continuous power handling on standard FR-5 PCB without heatsinking |
| Zener Impedance (ZZT) | ≤1300 Ω at IZT = 20 mA - indicates regulation stability under small-signal AC ripple conditions |
| Leakage Current (IR) | ≤0.25 µA at VR = 75 V - ensures minimal standby current draw in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - allows safe handling during manual assembly and board-level ESD events |
| Peak Surge Power | 225 W (8 × 20 µs pulse) - provides transient overvoltage suppression capability against short-duration spikes |
Pinout & Package
SOD-123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm body size, void-free thermosetting plastic case, UL 94 V-0 flammability rating, 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 reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW FR-5 Board Rating | Enables use in compact consumer and industrial PCBs without external heat sinking |
| ±5% Zener Voltage Tolerance | Supports cost-sensitive designs requiring moderate accuracy without trimming components |
| ESD Class 3 Compliance | Eliminates need for additional ESD protection in final assembly for handheld or field-deployed devices |
| Pb-Free SOD-123 Packaging | Meets RoHS and REACH requirements while maintaining compatibility with standard SnPb and lead-free reflow profiles |
Applications
| Low-Voltage Reference Source | Overvoltage Clamp for 3.3 V Logic |
|---|---|
Use Scenario: Providing stable 2.7 V reference for ADC input scaling or op-amp biasing in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference element establishing fixed potential relative to ground. Use Value: Delivers <2.5% total error across −55 °C to +125 °C ambient due to tight 2.7 V ±5% tolerance and low TC. | Use Scenario: Protecting microcontroller GPIO pins from accidental 5 V misconnection or ESD-induced transients on 3.3 V I/O lines. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 2.84 V to limit voltage excursion. Use Value: Limits peak voltage to ≤2.84 V with <1300 Ω dynamic impedance, preventing latch-up or oxide damage. |
| Linear Regulator Feedback Divider | Temperature-Stable Bias Network |
Use Scenario: Replacing top resistor in TL431-based adjustable LDO feedback network to reduce component count and improve accuracy. IC Role / Device Role / Timing Role: Precision Zener element setting reference voltage at error amplifier input. Use Value: Eliminates need for matched resistor divider; achieves ±5% output regulation without calibration. | Use Scenario: Biasing base-emitter junction of PNP transistor in temperature-compensated current source for analog front-ends. IC Role / Device Role / Timing Role: Stable voltage reference defining emitter-base voltage drop independent of supply variation. Use Value: Maintains <1% current drift over −40 °C to +85 °C due to low Zener voltage temperature coefficient near zero-crossing point. |
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 (1.7 × 1.25 × 0.95 mm) | Lower power handling; smaller footprint but higher thermal resistance (450 °C/W) | Select when board area is critical and continuous power <300 mW suffices |
| MMBZ5223BS | 2.7 V ±5%, 350 mW rating, SOT-23 package (2.9 × 1.3 × 1.0 mm), 3-terminal configuration | Includes anode/cathode/substrate terminals; requires different layout and offers better thermal dissipation than SOD-123 | Select when higher reliability under thermal cycling or need for substrate isolation is required |
Compared with BZX584C2V7 and MMBZ5223BS, the MMSZ5223ET1 offers superior power handling (500 mW vs. 300/350 mW) and lower thermal resistance (340 °C/W) in a widely adopted SOD-123 footprint, making it optimal for general-purpose voltage clamping where board space permits standard 2.7 V Zener performance.
Availability
MMSZ5223ET1 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and regulator feedback applications requiring stable component supply across automotive infotainment modules, industrial sensor nodes, and medical wearable electronics.
Supply support for MMSZ5223ET1 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 and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxET1G series is part of onsemi's general-purpose Zener diode portfolio, engineered for medium-current voltage regulation and clamping in cost-sensitive, high-volume surface-mount designs.
FAQ
What is the nominal Zener voltage and tolerance of MMSZ5223ET1?
The MMSZ5223ET1 has a nominal Zener voltage of 2.7 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 2.57 V and 2.84 V when tested at 20 mA reverse current and 25 °C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet for MMSZ5223ET1G.
What is the maximum power dissipation of MMSZ5223ET1 and how does it derate with temperature?
MMSZ5223ET1 is rated for 500 mW total power dissipation at a lead temperature (TL) of 75 °C on FR-5 board. Above 75 °C, it derates linearly at 6.7 mW/°C, reaching zero dissipation at approximately 149 °C. This derating curve is defined in the Maximum Ratings table and Figure 3 of the MMSZ5223ET1 datasheet.
Is MMSZ5223ET1 RoHS-compliant and what packaging format is available?
Yes, MMSZ5223ET1 is Pb-Free and RoHS-compliant, indicated by the "G" suffix in its full orderable part number MMSZ5223ET1G. It is supplied in tape-and-reel format with 3,000 units per reel, compatible with standard SMD pick-and-place equipment. The SOD-123 package meets UL 94 V-0 flammability standards.
What is the Zener impedance of MMSZ5223ET1 and why does it matter?
The MMSZ5223ET1 exhibits a maximum Zener impedance (ZZT) of 1300 Ω at 20 mA test current and 1 kHz AC signal. This value reflects how tightly the device maintains its breakdown voltage under varying load or ripple conditions - lower impedance means better regulation stability, especially in analog reference or feedback applications where voltage precision is critical.
How is polarity identified on the MMSZ5223ET1 SOD-123 package?
MMSZ5223ET1 uses a cathode band marking on the SOD-123 body to identify Pin 1 (cathode); the unmarked end is the anode (Pin 2). This polarity marking aligns with JEDEC standard SOD-123 mechanical drawings and is visible under standard optical inspection - correct orientation is essential to ensure proper reverse-bias operation during circuit design and assembly.
MMSZ5223ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 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
MMSZ5223ET1 FAQ
1.How can I place an order for MMSZ5223ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5223ET1 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 MMSZ5223ET1 reliable?
The price and inventory of MMSZ5223ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5223ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ5223ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5223ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5223ET1?
MMSZ5223ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5223ET1 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 MMSZ5223ET1?
For technical support, including MMSZ5223ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5223ET1 requirements.
6.How does Aetrix verify that MMSZ5223ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5223ET1 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 MMSZ5223ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ5223ET1?
All MMSZ5223ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5223ET1, 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 MMSZ5223ET1 part is unused and in its original packaging.
Return procedure for MMSZ5223ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5223ET1 Tags
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