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onsemi MMBZ5223BLT1
- Part No.:
- MMBZ5223BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5223BLT1.pdf
- Description:
- DIODE ZENER 2.7V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,983
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Product details
Overview
MMBZ5223BLT1 from onsemi is a 2.7 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 2.56–2.84 V nominal Zener voltage at 20 mA test current, with 1300 Ω dynamic impedance and ≤0.25 μA leakage at 1 V reverse bias, commonly used in portable power rail clamping and reference stabilization.
For engineers reviewing the MMBZ5223BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across varying load currents. Its Zener mechanism provides predictable regulation with temperature coefficient near zero at ~2.7 V, and it exhibits low forward voltage (≤0.95 V @ 10 mA) for bidirectional clamping capability.
The SOT-23 package supports automated placement and reflow soldering up to 260°C for 10 seconds, with cathode polarity marked by a band. Pin 2 is internally unconnected - confirmed by mechanical outline Style 8 and electrical characterization tables - ensuring no parasitic conduction path affects regulation accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.56–2.84 V @ IZT = 20 mA - defines regulated output range under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling before thermal derating |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 20 mA - indicates voltage stability under small-signal AC variations |
| Reverse Leakage Current | ≤0.25 μA @ VR = 1 V - ensures minimal standby current in low-power shutdown modes |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and assembly |
| Junction Temperature Range | −65°C to +150°C - supports operation in automotive under-hood and industrial environments |
| Forward Voltage | ≤0.95 V @ IF = 10 mA - enables use as bidirectional transient suppressor in signal lines |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body with 1.90 mm lead pitch; void-free thermosetting plastic case, corrosion-resistant finish, UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation; carries forward current when used as clamp |
| 2 | No Connection | Internally unconnected terminal - must remain floating; no routing or soldering required |
| 3 | Cathode | Connected to higher-potential node; polarity band identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction suitable for consumer and industrial end-equipment without hazardous substance restrictions |
| Small-Signal Zener Regulation | Stable 2.7 V reference with ±5% tolerance and low tempco - ideal for biasing, feedback, and sensing circuits |
| High-Density Mounting | SOT-23 footprint minimizes PCB area vs. DO-35 or SOD-123 - enables >1000 components/in² layout density |
| Automated Assembly Optimized | Transfer-molded case geometry and solderable finish ensure reliable pick-and-place and reflow yield |
| Robust ESD Protection | Class 3 HBM rating eliminates need for external ESD diodes in many I/O protection schemes |
Applications
| Portable Power Rail Clamping | Low-Voltage Reference Generation |
|---|---|
Use Scenario: Protecting 3.3 V or 2.8 V microcontroller I/O pins from ESD and transient overvoltage in handheld devices. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting input swing to ±0.95 V forward / 2.7 V reverse. Use Value: Eliminates need for separate TVS and reference diodes - reduces BOM count and board space. |
Use Scenario: Providing stable bias voltage for op-amp comparators or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Precision Zener reference source with <±5% initial tolerance and low tempco. Use Value: Enables accurate analog measurements down to 12-bit resolution without trimming or calibration. |
| USB Data Line Protection | High-Density PC Board Voltage Monitoring |
Use Scenario: Safeguarding USB 2.0 D+/D− lines against contact discharge and cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (<10 pF typical) clamping diode placed directly at connector. Use Value: Preserves signal integrity up to 480 Mbps while meeting IEC 61000-4-2 Level 4 requirements. |
Use Scenario: Monitoring 2.5 V supply rails on compact FPGA carrier boards with limited real estate. IC Role / Device Role / Timing Role: Compact voltage supervisor element integrated into power-good detection circuitry. Use Value: Supports dual-rail monitoring with single SOT-23 footprint - avoids larger SOIC alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V7LT1G | 2.7 V ±5%, 300 mW rating, same SOT-23 package but higher power dissipation | Preferred where higher surge energy absorption is needed (e.g., industrial sensor interfaces) | Select when thermal margin >225 mW is required; verify layout clearance for increased power density |
| MMBZ5223BS | Same Zener voltage spec but in SOD-123 package - 3.7 mm × 1.6 mm vs. SOT-23's 2.9 mm × 1.3 mm | Better suited for manual repair or prototyping due to larger pad spacing and visibility | Choose for hand-soldered prototypes or legacy designs requiring SOD-123 footprint compatibility |
Compared with MMBZ5223BLT1, BZX84-C2V7LT1G offers higher power headroom but requires thermal validation in tight layouts, while MMBZ5223BS trades miniaturization for easier assembly - both retain identical regulation performance but differ in physical integration constraints.
Availability
MMBZ5223BLT1 is available at Aetrix Electronics and suitable for portable electronics, battery management systems, and high-density PC boards requiring stable component supply with RoHS compliance and automotive-grade reliability.
Supply support for MMBZ5223BLT1 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener regulator portfolio, engineered for compact, high-reliability voltage reference and protection in space- and power-constrained applications.
FAQ
What is the exact Zener voltage tolerance of MMBZ5223BLT1 at 20 mA test current?
The MMBZ5223BLT1 has a guaranteed Zener voltage range of 2.56 V to 2.84 V at IZT = 20 mA, representing ±5% tolerance around the nominal 2.7 V value. This specification is verified per onsemi's Electrical Characteristics table on page 3 of the official datasheet, with measurement performed at TA = 25°C using pulse testing to avoid self-heating effects. The MMBZ5223BLT1 maintains this tolerance across its qualified operating temperature range.
Does MMBZ5223BLT1 have a functional connection on pin 2?
No, pin 2 of the MMBZ5223BLT1 is a no-connect (NC) terminal - it is not bonded internally and must remain electrically floating in the PCB layout. This is explicitly defined in the Mechanical Characteristics section (Style 8) and confirmed by the pinout diagram on page 2 of the datasheet. Routing or soldering to pin 2 may cause assembly defects or unintended parasitic paths, so it should be left unconnected in all designs using MMBZ5223BLT1.
Can MMBZ5223BLT1 be used for bidirectional ESD protection?
Yes, the MMBZ5223BLT1 supports bidirectional clamping: its forward voltage is ≤0.95 V at 10 mA, and reverse Zener voltage is 2.7 V nominal, enabling symmetric voltage limiting between signal lines and ground. Its Class 3 ESD rating (>16 kV HBM) and low capacitance (~10 pF at 0 V bias) make it suitable for protecting low-speed digital I/O such as UART or I²C lines - a capability validated in onsemi's Typical Characteristics (Figures 4 and 5) for MMBZ5223BLT1.
What is the thermal resistance of MMBZ5223BLT1 on standard FR-5 PCB?
The junction-to-ambient thermal resistance (RJA) of MMBZ5223BLT1 is 556 °C/W when mounted on an FR-5 board measuring 1.0 × 0.75 × 0.62 inches, as specified in the Maximum Ratings table on page 1 of the datasheet. This value assumes natural convection cooling and defines the temperature rise per milliwatt of power dissipated - critical for calculating safe operating limits in thermally constrained designs using MMBZ5223BLT1.
Is MMBZ5223BLT1 compliant with automotive qualification standards?
No, the base MMBZ5223BLT1 is not AEC-Q101 qualified; only the SZ-prefix variants (e.g., SZMMBZ5223BLT1G) carry automotive qualification and PPAP capability. The datasheet explicitly states "SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q101 Qualified and PPAP Capable" - meaning MMBZ5223BLT1 is intended for commercial/industrial use, while automotive applications require the SZMMBZ5223BLT1G variant to meet those standards.
MMBZ5223BLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 225 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:
- SOT-23-3 (TO-236)
MMBZ5223BLT1 FAQ
1.How can I place an order for MMBZ5223BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5223BLT1 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 MMBZ5223BLT1 reliable?
The price and inventory of MMBZ5223BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5223BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5223BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5223BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5223BLT1?
MMBZ5223BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5223BLT1 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 MMBZ5223BLT1?
For technical support, including MMBZ5223BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5223BLT1 requirements.
6.How does Aetrix verify that MMBZ5223BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5223BLT1 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 MMBZ5223BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5223BLT1?
All MMBZ5223BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5223BLT1, 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 MMBZ5223BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5223BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5223BLT1 Tags
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