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Diodes Incorporated MMBZ5226BQ-7-F
- Part No.:
- MMBZ5226BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5226BQ-7-F.pdf
- Description:
- DIODE ZENER 3.3V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
MMBZ5226BQ-7-F from Diodes Incorporated is a 3.3 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current, 28 Ω dynamic impedance at 1 kHz, and 25 µA reverse leakage at 1.0 V, used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5226BQ-7-F datasheet, MMBZ5226BQ-7-F pinout, MMBZ5226BQ-7-F application, or MMBZ5226BQ-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±3.6%), thermal resistance (357 °C/W), JEDEC-qualified reliability, RoHS/Green compliance, and SOT23 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent Zener characteristics and low parameter drift across production lots.
Designed for use as a shunt regulator or voltage clamp, it delivers specified performance at 20 mA test current with tight 3.14–3.47 V Zener voltage range and defined impedance behavior up to 1 kHz - critical for noise-sensitive biasing and feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.14–3.47 V min/max at IZT = 20 mA - defines regulated output voltage window under standard test conditions. |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - maximum continuous power handling with recommended pad layout; derates linearly above +25°C ambient. |
| Zener Impedance (ZZT) | 28 Ω at f = 1 kHz, IZT = 20 mA - indicates AC voltage regulation stability in feedback loops and reference circuits. |
| Reverse Leakage (IR) | 25 µA at VR = 1.0 V - quantifies off-state conduction loss in clamping applications below breakdown threshold. |
| Thermal Resistance (RθJA) | 357 °C/W - determines junction temperature rise per watt dissipated; requires thermal-aware PCB layout for sustained operation. |
| Operating Temperature | −65 °C to +150 °C - supports industrial and automotive-adjacent environments without derating penalties at extremes. |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to system ground or lower-potential node when used in shunt regulation; defines polarity for reverse-bias operation. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to voltage rail being stabilized; carries full Zener current during regulation; requires current-limiting series resistor. |
| No-Connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected to die; serves structural role in SOT23 mold; must remain unconnected in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term parametric stability across temperature and life cycles. |
| 350 mW power rating on FR-4 | Enables direct integration into cost-sensitive consumer and industrial PCBs without heatsinking or special substrates. |
| JEDEC-qualified high reliability | Meets AEC-Q200 stress test requirements for passive components - suitable for mission-critical power monitoring functions. |
| Lead-free, halogen-free, RoHS 3 compliant | Supports global environmental compliance mandates and eliminates post-soldering cleaning steps in high-volume manufacturing. |
Applications
| USB Port ESD Clamp | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamps transient voltages on USB D+/D− lines during ESD events to protect PHY transceivers. IC Role / Device Role: Shunt-type transient voltage suppressor operating in reverse breakdown during overvoltage spikes. Use Value: Limits line voltage to ≤3.47 V during 8 kV contact discharge, preventing latch-up or damage to 3.3 V tolerant I/O cells. |
Use Scenario: Generates clean, temperature-stable reset signal for ARM Cortex-M microcontrollers during power-up and brownout. IC Role / Device Role: Precision voltage reference feeding RC delay network to reset supervisor IC or GPIO input. Use Value: Maintains 3.3 V reference within ±3.6% over −40 °C to +85 °C, ensuring deterministic reset assertion timing across operating range. |
| ADC Reference Stabilizer | Low-Power Sensor Bias Supply |
|
Use Scenario: Stabilizes reference voltage for 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role: Low-noise shunt regulator providing fixed 3.3 V reference to ADC REF+ pin. Use Value: Delivers <28 Ω impedance at 1 kHz, minimizing reference ripple-induced INL error (<0.5 LSB) at sampling rates up to 1 MSPS. |
Use Scenario: Supplies stable bias voltage to MEMS pressure sensor bridge in HVAC control modules. IC Role / Device Role: Low-quiescent-current voltage clamp regulating excitation voltage for Wheatstone bridge. Use Value: Draws only 25 µA leakage at 1.0 V, enabling >10-year battery life in always-on sensor nodes powered by CR2032 cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3-7-F | Same 3.3 V nominal, but 300 mW PD, 60 Ω ZZT, and wider 3.1–3.5 V tolerance band. | Higher impedance limits use in precision references; better suited for general-purpose clamping where accuracy is secondary. | Select when cost sensitivity outweighs regulation accuracy and thermal margin is constrained. |
| MM3Z3V3T1G | 3.3 V nominal, 200 mW PD, 90 Ω ZZT, and ±5% voltage tolerance; SOD-323 package (smaller footprint). | Lower power rating restricts current-handling capability; smaller package reduces thermal mass and increases RθJA. | Choose for space-constrained designs where 20 mA regulation current is not required and board area is premium. |
Compared with BZX84-C3V3-7-F and MM3Z3V3T1G, MMBZ5226BQ-7-F offers superior voltage tightness (±3.6%), lower dynamic impedance (28 Ω), and higher power headroom (350 mW), making it optimal for precision analog biasing and thermally demanding industrial layouts.
Availability
MMBZ5226BQ-7-F is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, and ADC reference stabilization requiring stable component supply and full traceability.
Supply support for MMBZ5226BQ-7-F 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
This device belongs to the MMBZ52xxB family of 350 mW Zener diodes engineered for high-reliability voltage regulation in automotive-adjacent, industrial, and consumer electronics where JEDEC qualification and green compliance are mandatory.
FAQ
What is the maximum continuous Zener current for MMBZ5226BQ-7-F at 25°C ambient?
The absolute maximum DC Zener current is derived from PD/VZ = 350 mW / 3.3 V ≈ 106 mA, but the datasheet specifies 20 mA as the standardized test current (IZT) for parameter characterization. For reliable long-term operation, design current should stay ≤70 mA to maintain junction temperature below 150°C with typical PCB thermal relief.
Does MMBZ5226BQ-7-F meet AEC-Q200 requirements for passive components?
Yes - Diodes Incorporated qualifies this part to JEDEC standards referenced in AEC-Q200, including temperature cycling, humidity testing, and solder heat resistance. While the "Q" suffix denotes automotive-grade packaging and traceability, the base MMBZ5226BQ-7-F meets AEC-Q200 stress test profiles for passive Zener diodes.
Can MMBZ5226BQ-7-F be used in place of a 3.3 V LDO regulator?
No - it functions only as a shunt regulator requiring an external current-limiting resistor and cannot source load current like an LDO. It is appropriate for low-current biasing (<5 mA) or voltage clamping, but not for powering active loads. Use only where the regulated node draws negligible current relative to the series resistor's value.
How does the "Q" in MMBZ5226BQ-7-F differ from MMBZ5226B-7-F?
The "Q" suffix indicates qualification for automotive applications: enhanced traceability, PPAP documentation readiness, and manufacturing in IATF 16949-certified facilities. Electrically and physically identical to the non-Q version, it adds process controls and reporting required for Tier 1 automotive supply chains.
MMBZ5226BQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 350 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5226BQ-7-F FAQ
1.How can I place an order for MMBZ5226BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5226BQ-7-F 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 MMBZ5226BQ-7-F reliable?
The price and inventory of MMBZ5226BQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5226BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5226BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5226BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5226BQ-7-F?
MMBZ5226BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5226BQ-7-F 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 MMBZ5226BQ-7-F?
For technical support, including MMBZ5226BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5226BQ-7-F requirements.
6.How does Aetrix verify that MMBZ5226BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5226BQ-7-F 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 MMBZ5226BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5226BQ-7-F?
All MMBZ5226BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5226BQ-7-F, 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 MMBZ5226BQ-7-F part is unused and in its original packaging.
Return procedure for MMBZ5226BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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