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onsemi MMBZ5226BLT1
- Part No.:
- MMBZ5226BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5226BLT1.pdf
- Description:
- DIODE ZENER 3.3V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,398
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Product details
Overview
MMBZ5226BLT1 from onsemi is a 3.3 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 28 Ω dynamic impedance at 20 mA test current and 25 µA reverse leakage at 1 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the MMBZ5226BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.3 V nominal Zener voltage, 225 mW surface-mount power rating, Class 3 ESD robustness (>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 clamp voltage at its specified Zener level. Its 3.3 V nominal voltage falls within the low-voltage regulation range optimized for 3.3 V logic supply stabilization and I/O rail protection.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), with polarity indicated by a band. Thermal resistance is 556 °C/W junction-to-ambient on FR-5 board, enabling stable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.13–3.47 V @ 20 mA - defines precise clamping threshold for 3.3 V system rails |
| Power Dissipation (PD) | 225 mW on FR-5 board - supports continuous low-power regulation without heatsinking |
| Zener Impedance (ZZT) | 28 Ω @ 20 mA - ensures minimal voltage deviation under load transients |
| Reverse Leakage (IR) | 25 µA @ 1 V - guarantees low standby current in battery-powered applications |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge in handheld assembly and end-use |
| Junction Temp Range | −65 °C to +150 °C - enables deployment in automotive cabin and industrial ambient environments |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction |
| 2 (NC) | No connection | Internally unconnected terminal; must remain floating-no PCB trace or pad required |
| 3 (Cathode) | Cathode connection | Connected to higher-potential node; polarity band on package identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction suitable for global electronics manufacturing and environmental compliance programs |
| 225 mW FR-5 Power Rating | Enables direct integration into compact 3.3 V regulator feedback paths without derating concerns at 25 °C |
| Class 3 ESD Robustness | Eliminates need for external ESD protection diodes in USB data line or button interface circuits |
| Small SOT-23 Footprint | Reduces PCB area by >60% vs. DO-35, supporting miniaturization in wearables and IoT sensor nodes |
Applications
| USB Interface Protection | 3.3 V Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient overvoltage on USB D+ and D− lines during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Zener voltage clamp protecting transceiver I/O pins from damage. Use Value: Leverages 3.3 V Zener threshold and 16 kV HBM rating to absorb surges without sacrificing signal integrity. |
Use Scenario: Generating a clean, temperature-stable reset voltage for ARM Cortex-M0+ microcontrollers. IC Role / Device Role / Timing Role: Precision voltage reference defining reset assertion threshold. Use Value: 3.3 V nominal voltage with ±5% tolerance ensures reliable reset release across −40 °C to +85 °C operating range. |
| Portable Audio Codec Biasing | Low-Power Sensor Signal Conditioning |
Use Scenario: Providing stable bias voltage for headphone amplifier input stages in Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-noise DC reference source for analog front-end circuitry. Use Value: 28 Ω dynamic impedance minimizes AC ripple coupling into sensitive audio paths. |
Use Scenario: Regulating excitation voltage for MEMS pressure sensors in medical inhalers. IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference for analog signal chain. Use Value: 25 µA leakage at 1 V enables multi-year battery life in coin-cell powered devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3 | 3.3 V ±5%, 300 mW rating, same SOT-23 package but higher power capability | Higher power handling allows use in 5 V rail clamping with series resistor; less optimal for ultra-low-leakage designs | Select when higher surge energy absorption is needed; verify thermal margin on FR-5 board |
| MMBZ5226BS | Identical electrical specs but in SOD-123 package (larger footprint, 400 mW rating) | Requires PCB layout change; suited for industrial boards where space is less constrained | Choose for legacy designs using SOD-123 or where higher reliability margin under sustained power is required |
Compared with BZX84-C3V3 and MMBZ5226BS, the MMBZ5226BLT1 offers the tightest balance of 225 mW power rating, ultra-small SOT-23 footprint, and 25 µA leakage-making it optimal for space- and power-sensitive portable applications where board real estate is premium.
Availability
MMBZ5226BLT1 is available at Aetrix Electronics and suitable for smartphone power management, USB interface protection, and wearable sensor biasing requiring stable component supply and consistent parametric performance across production lots.
Supply support for MMBZ5226BLT1 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 silicon solutions for automotive, industrial, cloud, and consumer electronics markets.
The MMBZ52xxBLT1G series was designed specifically for high-density, low-power voltage regulation in portable and battery-operated systems-emphasizing small form factor, ESD resilience, and RoHS compliance.
FAQ
What is the exact Zener voltage tolerance for MMBZ5226BLT1?
The MMBZ5226BLT1 has a Zener voltage range of 3.13 V to 3.47 V at 20 mA test current, corresponding to a ±5% tolerance around the nominal 3.3 V value. This tolerance is guaranteed per the Electrical Characteristics table on page 3 of the official onsemi datasheet, and applies under standard test conditions of TA = 25°C.
Does MMBZ5226BLT1 have a functional pin 2 connection?
No, MMBZ5226BLT1 has no internal connection to pin 2 - it is explicitly designated as "No Connection" in the mechanical outline (Style 8) and confirmed in the Electrical Characteristics table. PCB layout must leave pin 2 unconnected; routing or soldering to this terminal may compromise device reliability or cause misassembly.
Is MMBZ5226BLT1 suitable for automotive applications?
The standard MMBZ5226BLT1 is not AEC-Q101 qualified. For automotive use, the SZMMBZ5226BLT1G variant - which shares identical electrical specs but includes PPAP-capable manufacturing and site-specific controls - must be selected. The "SZ" prefix denotes automotive-grade qualification per onsemi's ordering nomenclature.
What is the maximum allowable soldering temperature for MMBZ5226BLT1?
The maximum case temperature for soldering MMBZ5226BLT1 is 260°C for 10 seconds, as specified in the Mechanical Characteristics section. This limit applies to both reflow and hand-soldering processes and ensures integrity of the void-free transfer-molded plastic case and internal wire bonds.
How does the 225 mW rating of MMBZ5226BLT1 translate to practical board-level design?
The 225 mW rating for MMBZ5226BLT1 is measured on FR-5 board (1.0 × 0.75 × 0.62 in); exceeding this power - even briefly - risks thermal runaway. Designers must calculate worst-case power (VZ × IZ) under all operating conditions and ensure average dissipation stays below 225 mW, with derating of 1.8 mW/°C above 25°C ambient.
MMBZ5226BLT1 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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 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)
MMBZ5226BLT1 FAQ
1.How can I place an order for MMBZ5226BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5226BLT1 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 MMBZ5226BLT1 reliable?
The price and inventory of MMBZ5226BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5226BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5226BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5226BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5226BLT1?
MMBZ5226BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5226BLT1 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 MMBZ5226BLT1?
For technical support, including MMBZ5226BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5226BLT1 requirements.
6.How does Aetrix verify that MMBZ5226BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5226BLT1 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 MMBZ5226BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5226BLT1?
All MMBZ5226BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5226BLT1, 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 MMBZ5226BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5226BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5226BLT1 Tags
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MM5Z5V1ST1G
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