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onsemi MMSZ5223BT3
- Part No.:
- MMSZ5223BT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5223BT3.pdf
- Description:
- DIODE ZENER 2.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,014
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Product details
Overview
MMSZ5223BT3 from onsemi is a 2.7 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 1300 Ω maximum dynamic impedance at 20 mA test current and 0.25 µA reverse leakage at 75 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ5223BT3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal mapping, and direct alternatives for voltage regulation design-in.
Technical Context
This device operates as a two-terminal silicon Zener diode, maintaining stable reverse breakdown voltage across its cathode–anode terminals under controlled current conditions. Its nominal 2.7 V Zener voltage is specified with junction in thermal equilibrium at TL = 30°C ±1°C, and exhibits a temperature coefficient of +2.5 mV/°C (typical) in the 2.4–3.6 V range.
It supports general-purpose medium-current regulation with 1000 V ESD rating per Human Body Model (Class 3), Pb-free construction compliant with RoHS, and AEC-Q101 qualification for automotive applications when ordered with SZ prefix. Thermal resistance is 340°C/W (junction-to-ambient) on FR-5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.7 V nominal, 2.57–2.84 V min/max at IZT = 20 mA - defines regulated output voltage tolerance band |
| Power Dissipation (PD) | 500 mW at TL = 75°C - sets maximum steady-state thermal load on PCB |
| Zener Impedance (ZZT) | 1300 Ω max at IZT = 20 mA - determines voltage regulation stability under load variation |
| Reverse Leakage (IR) | 0.25 µA max at VR = 75 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RJA) | 340°C/W on FR-5 board - governs junction temperature rise per watt dissipated |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in automated assembly without special ESD controls |
| Operating Temperature | −55°C to +150°C - supports industrial and under-hood automotive environments |
Pinout & Package
The MMSZ5223BT3 is housed in a Pb-free SOD−123 surface-mount plastic package (Case 425, Style 1), measuring 2.84 mm × 1.35 mm × 0.94 mm (L × W × H), with cathode indicated by a polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during operation |
| 2 (Anode) | Reference ground terminal | Tied to circuit common or lower potential; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating | Enables stable voltage reference in space-constrained, low-power designs without heatsinking |
| ±5% Zener voltage tolerance | Provides cost-effective regulation where tight voltage accuracy is not critical |
| ESD Class 3 compliance | Eliminates need for external ESD protection in board-level handling and assembly |
| SOD−123 footprint | Supports high-density PCB layouts and compatibility with standard pick-and-place equipment |
| AEC−Q101 qualified (SZ variant) | Validates reliability for automotive electronics requiring PPAP documentation |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA transmitter circuits operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Zener diode providing fixed 2.7 V reference for precision current loop scaling. Use Value: Maintains <±1% output error over temperature due to low TC and stable Zener impedance at 20 mA. |
Use Scenario: Supplying regulated reference to microcontroller ADC inputs in door module ECUs exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Voltage clamp and reference source protecting ADC inputs from transients and ensuring consistent sampling thresholds. Use Value: Survives 150°C junction temperature and >16 kV ESD events without degradation, meeting AEC-Q100 stress requirements. |
| Consumer IoT Power Management | Medical Wearable Battery Monitoring |
Use Scenario: Generating stable 2.7 V rail for low-noise LDO enable logic in Bluetooth LE sensor nodes powered by coin cells. IC Role / Device Role / Timing Role: Low-quiescent current voltage reference enabling ultra-low standby power (<1 µA total system sleep current). Use Value: 0.25 µA leakage at 75 V ensures no measurable drain on primary battery during multi-year shelf life. |
Use Scenario: Providing accurate voltage threshold for lithium-polymer battery undervoltage detection in patch-style ECG monitors. IC Role / Device Role / Timing Role: Precision Zener comparator reference ensuring ±2% battery SOC estimation across −20°C to +45°C patient use range. Use Value: Tight 2.57–2.84 V tolerance and +2.5 mV/°C TC minimize calibration drift between factory and field conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C2V7LT1G | 2.7 V ±5%, 300 mW rating, SOD-323 package, 100 Ω ZZT @ 5 mA | Lower power rating and smaller footprint; higher dynamic impedance at low current | Select for space-constrained designs where 300 mW suffices and tighter ZZT at 5 mA is acceptable |
| MMSZ4678ET1G | 2.7 V ±5%, 500 mW rating, SOD-123 package, 1000 Ω ZZT @ 20 mA, 0.1 µA IR @ 1 V | Near-identical package and power rating but lower leakage at low reverse bias | Prefer when minimizing sub-1 V leakage in high-impedance divider networks is critical |
Compared with MMSZ5223BT3, BZX584C2V7LT1G offers smaller size but reduced power handling, while MMSZ4678ET1G matches power and package but improves low-voltage leakage-both require validation of thermal margin and Zener impedance behavior at target operating current.
Availability
MMSZ5223BT3 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, and consumer IoT power management requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5223BT3 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The MMSZ52xxxT1G series is designed for general-purpose, medium-current voltage regulation in compact surface-mount applications-emphasizing thermal stability, ESD robustness, and AEC-Q101 readiness for harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of the MMSZ5223BT3?
The MMSZ5223BT3 has a ±5% Zener voltage tolerance, meaning its reverse breakdown voltage is guaranteed between 2.57 V and 2.84 V when tested at IZT = 20 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official datasheet.
Does the MMSZ5223BT3 meet automotive qualification standards?
The MMSZ5223BT3 itself is not automotive-qualified, but its SZ-prefix variant (SZMMSZ5223BT3) is AEC-Q101 qualified and PPAP capable. The base MMSZ5223BT3 shares identical electrical and thermal specifications, packaging, and construction-only differing in site control and change management for automotive production traceability.
What is the maximum reverse leakage current for the MMSZ5223BT3?
The MMSZ5223BT3 specifies a maximum reverse leakage current (IR) of 0.25 µA at VR = 75 V and TA = 25°C. This value is explicitly listed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the datasheet and reflects worst-case leakage under high reverse bias.
How does thermal derating affect the MMSZ5223BT3's power dissipation?
The MMSZ5223BT3 is rated for 500 mW at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. At 100°C lead temperature, its usable power drops to 332.5 mW. This derating curve is defined in the "MAXIMUM RATINGS" table and must be applied to ensure junction temperature stays within −55°C to +150°C limits.
Is the MMSZ5223BT3 compatible with lead-free reflow soldering processes?
Yes-the MMSZ5223BT3 is Pb-free and rated for peak reflow temperatures up to 260°C for 10 seconds, fully compliant with J-STD-020 moisture sensitivity level 1 and RoHS requirements. Its thermosetting plastic case and corrosion-resistant finish ensure reliable solder joint formation without delamination or voiding.
MMSZ5223BT3 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
MMSZ5223BT3 FAQ
1.How can I place an order for MMSZ5223BT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5223BT3 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 MMSZ5223BT3 reliable?
The price and inventory of MMSZ5223BT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5223BT3 is usually 5 days.
3.What payment methods are accepted for MMSZ5223BT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5223BT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5223BT3?
MMSZ5223BT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5223BT3 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 MMSZ5223BT3?
For technical support, including MMSZ5223BT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5223BT3 requirements.
6.How does Aetrix verify that MMSZ5223BT3 is sourced from the original manufacturer or authorized distributors?
All MMSZ5223BT3 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 MMSZ5223BT3 meets industry standards.
7.What is the process for return or replacement of MMSZ5223BT3?
All MMSZ5223BT3 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5223BT3, 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 MMSZ5223BT3 part is unused and in its original packaging.
Return procedure for MMSZ5223BT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5223BT3 Tags
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