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onsemi MMBZ5228BLT3
- Part No.:
- MMBZ5228BLT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5228BLT3.pdf
- Description:
- DIODE ZENER SINGLE 3.9V 5% 300MW
- Quantity:
- Payment:
- Shipping:
Inventory:80,000
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Product details
Overview
MMBZ5228BLT3 from onsemi is a 3.9 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board and featuring 23 Ω maximum Zener impedance at 20 mA test current. It provides precise voltage regulation in space-constrained applications such as portable power rails and voltage reference circuits in handheld electronics.
For engineers reviewing the MMBZ5228BLT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.9 V nominal Zener voltage, 10 µA reverse leakage at 1 V, 23 Ω dynamic impedance, AEC-Q101 qualification, and ESD rating >16 kV per HBM - all critical for low-power, high-reliability signal conditioning and overvoltage protection designs.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, where terminal 2 is unconnected (NC). Its Zener breakdown mechanism delivers stable regulation across −65°C to +150°C junction temperature range, with thermal resistance of 556°C/W on FR-5 board.
The MMBZ5228BLT3 exhibits a typical temperature coefficient near 0 mV/°C for its 3.9 V rating, enabling minimal drift in bias networks. Its 0.95 V max forward voltage at 10 mA supports use in dual-direction clamping configurations when combined with external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70–4.10 V at 20 mA - defines regulated output voltage tolerance band for precision reference design |
| Power Dissipation (PD) | 225 mW on FR-5 board - sets maximum continuous power handling without derating at 25°C ambient |
| Zener Impedance (ZZT) | 23 Ω max at IZT = 20 mA - determines AC regulation stability under varying load conditions |
| Reverse Leakage (IR) | 10 µA max at VR = 1 V - ensures minimal quiescent current draw in standby or battery-powered modes |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling during automated PCB assembly without additional protection |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| Polarity | Cathode indicated by band on terminal 3 - critical for correct orientation in voltage clamp or regulator circuits |
Pinout & Package
SOT-23 (Case 318, Style 8) surface-mount package with 3 terminals: compact 2.9 mm × 1.3 mm footprint, 0.95 mm height, and Pb-free plating compatible with lead-free reflow profiles up to 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation; carries forward current if used bidirectionally |
| 2 | No Connection (NC) | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; marked by polarity band; carries Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing |
| 225 mW FR-5 rating | Enables direct integration into dense PCB layouts without heatsinking in low-power analog subsystems |
| ESD >16 kV (HBM) | Eliminates need for external ESD protection in consumer handheld and wearable device interfaces |
| Pb-free (RoHS compliant) | Meets global environmental compliance requirements without compromising solderability or thermal performance |
| Small outline SOT-23 | Reduces board area by >70% vs. DO-35, supporting miniaturization in battery management and sensor modules |
Applications
| Portable Power Rail Clamping | Low-Voltage Reference Generator |
|---|---|
|
Use Scenario: Protecting 3.3 V I/O lines in Bluetooth headsets against ESD transients and supply overvoltage. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast clamping response with <1 ns turn-on delay. Use Value: Maintains rail integrity below 4.1 V while drawing only 10 µA leakage at 1 V - extending battery life in always-on mode. |
Use Scenario: Generating stable 3.9 V reference for ADC biasing in medical pulse oximeter front-ends. IC Role / Device Role / Timing Role: Precision voltage reference with ±5% tolerance and low TC, replacing larger TL431-based solutions. Use Value: Delivers 23 Ω dynamic impedance at 20 mA, minimizing reference noise contribution to sub-12-bit measurement accuracy. |
| Automotive Sensor Biasing | USB-C Port Overvoltage Protection |
|
Use Scenario: Biasing NTC thermistors in cabin temperature sensors within automotive HVAC control modules. IC Role / Device Role / Timing Role: Stable Zener source operating across −40°C to +125°C ambient with AEC-Q101 validation. Use Value: Ensures <±0.5% voltage drift over full temperature range, directly improving sensor linearity calibration. |
Use Scenario: Secondary overvoltage clamp on VBUS line in USB-C power delivery adapters. IC Role / Device Role / Timing Role: Fast-reacting shunt element limiting transient spikes above 4.1 V before primary OVP IC responds. Use Value: Withstands >16 kV HBM ESD events and regulates within 3.7–4.1 V window - preventing false triggering of downstream protection. |
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-C3V9 | Same 3.9 V nominal, but 350 mW rating and 90 Ω ZZT; SOT-23 package with identical pinout (1-Anode, 2-NC, 3-Cathode) | Higher power handling suits higher-current bias networks; higher impedance limits AC regulation fidelity | Select when >225 mW dissipation is needed and 90 Ω ZZT is acceptable for DC-only reference use |
| MMBZ5228BS | Same electrical specs, but SOD-323 (SC-76) package - 1.7 mm × 1.25 mm vs. SOT-23's 2.9 mm × 1.3 mm; same pinout | Smaller footprint enables ultra-dense routing; reduced thermal mass lowers power handling to 200 mW | Choose for space-constrained RF modules where 200 mW rating suffices and layout density is critical |
Compared with BZX84-C3V9 and MMBZ5228BS, the MMBZ5228BLT3 offers optimal balance of low ZZT (23 Ω), AEC-Q101 qualification, and 225 mW FR-5 rating - making it preferred for automotive and portable electronics requiring both precision and reliability in standard SOT-23 assembly.
Availability
MMBZ5228BLT3 is available at Aetrix Electronics and suitable for portable power rail clamping, low-voltage reference generation, automotive sensor biasing, and USB-C port overvoltage protection requiring stable component supply across production lifecycles.
Supply support for MMBZ5228BLT3 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxBLT3 series belongs to onsemi's Zener voltage regulator product line, engineered for high-density surface-mount applications demanding tight voltage tolerance, low leakage, and robust ESD immunity in portable and automotive electronics.
FAQ
What is the exact Zener voltage tolerance of MMBZ5228BLT3 at 20 mA?
The MMBZ5228BLT3 has a guaranteed Zener voltage range of 3.70 V to 4.10 V at test current IZT = 20 mA, corresponding to a ±5% tolerance around the nominal 3.9 V rating. This specification is verified per onsemi's Rev. 10 datasheet and applies under TA = 25°C with pulse testing to minimize self-heating effects on MMBZ5228BLT3 measurement accuracy.
Is MMBZ5228BLT3 pin-compatible with other SOT-23 Zener diodes?
Yes, MMBZ5228BLT3 uses standard SOT-23 pinout: Pin 1 = Anode, Pin 2 = No Connection (NC), Pin 3 = Cathode. This matches industry-standard Zener diodes like BZX84-C3V9 and MMBZ5228BS, enabling direct PCB layout reuse where thermal and electrical margins permit. The NC pin must remain unconnected in all MMBZ5228BLT3 implementations.
Does MMBZ5228BLT3 meet automotive qualification standards?
Yes, MMBZ5228BLT3 is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and ESD - all validated for the exact MMBZ5228BLT3 device marking and SOT-23 packaging.
What is the maximum reverse leakage current for MMBZ5228BLT3 at 1 V?
The MMBZ5228BLT3 specifies a maximum reverse leakage current (IR) of 10 µA at VR = 1 V and TA = 25°C. This low leakage supports extended battery life in always-on portable devices and ensures minimal error contribution when used as a precision reference in high-impedance bias networks involving MMBZ5228BLT3.
Can MMBZ5228BLT3 be used in bidirectional ESD protection configurations?
While MMBZ5228BLT3 is optimized as a unidirectional Zener regulator, its 0.95 V max forward voltage at 10 mA allows limited bidirectional use when paired with a second MMBZ5228BLT3 in series opposition. However, dedicated TVS diodes like ESD9X3.3S are recommended for certified IEC 61000-4-2 protection - MMBZ5228BLT3 serves best as a cost-effective, low-leakage shunt regulator in DC-coupled circuits.
MMBZ5228BLT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
MMBZ5228BLT3 FAQ
1.How can I place an order for MMBZ5228BLT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5228BLT3 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 MMBZ5228BLT3 reliable?
The price and inventory of MMBZ5228BLT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5228BLT3 is usually 5 days.
3.What payment methods are accepted for MMBZ5228BLT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5228BLT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5228BLT3?
MMBZ5228BLT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5228BLT3 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 MMBZ5228BLT3?
For technical support, including MMBZ5228BLT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5228BLT3 requirements.
6.How does Aetrix verify that MMBZ5228BLT3 is sourced from the original manufacturer or authorized distributors?
All MMBZ5228BLT3 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 MMBZ5228BLT3 meets industry standards.
7.What is the process for return or replacement of MMBZ5228BLT3?
All MMBZ5228BLT3 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5228BLT3, 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 MMBZ5228BLT3 part is unused and in its original packaging.
Return procedure for MMBZ5228BLT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5228BLT3 Tags
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