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Diodes Incorporated MMBZ5244BQ-7-F
- Part No.:
- MMBZ5244BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5244BQ-7-F.pdf
- Description:
- DIODE ZENER 14V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
MMBZ5244BQ-7-F from Diodes Incorporated is a 14 V, 9.0 mA nominal zener diode in SOT23 package, rated for 350 mW power dissipation on FR-4 PCB, with 15 Ω zener impedance at test current and 0.1 µA reverse leakage at 10 V, used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5244BQ-7-F datasheet, MMBZ5244BQ-7-F pinout, MMBZ5244BQ-7-F application, or MMBZ5244BQ-7-F equivalent, key selection criteria include zener voltage tolerance (±5% at 14 V), thermal resistance (357 °C/W), JEDEC-compliant reliability, and automotive-grade qualification readiness via Q-suffix variants.
Technical Context
This device operates as a silicon planar zener diode optimized for stable reverse-biased breakdown at 14 V with tight 13.3–14.7 V range. It uses alloy 42 leadframe with matte tin plating and meets J-STD-020 Level 1 moisture sensitivity.
Its 350 mW power rating is validated on FR-4 PCB with specified pad layout; derating begins linearly above +25°C ambient per Figure 1, reaching zero dissipation at +150°C. Zener impedance remains ≤600 Ω up to 0.25 mA knee current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V nominal, 13.3–14.7 V min/max - ensures ±5% regulation accuracy under 9.0 mA test current |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - defines maximum continuous steady-state power handling without forced cooling |
| Zener Impedance (ZZT) | 15 Ω @ IZT = 9.0 mA - indicates low dynamic resistance for stable regulation under load transients |
| Reverse Leakage (IR) | 0.1 µA @ VR = 10 V - confirms minimal standby current in clamping or reference configurations |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal design margin |
| Operating Temperature | −65 to +150 °C - supports extended industrial and automotive under-hood environments |
| Package | SOT23 - surface-mount, 3-terminal discrete package enabling high-density PCB layouts and automated assembly |
Pinout & Package
MMBZ5244BQ-7-F is housed in a standard SOT23 plastic package with matte tin-plated alloy 42 leadframe. Pin 1 is anode, Pin 2 is cathode, Pin 3 is not connected (NC) - confirmed by Diodes Incorporated SOT23 top-view schematic and terminal connection note in DS18011 Rev. 26-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward-biased terminal; connects to lower-potential node in reverse-regulation configuration |
| Pin 2 | Cathode | Zener breakdown terminal; connects to regulated voltage rail or clamp point |
| Pin 3 | No Connection | Internally unconnected; must remain floating - no PCB trace or solder mask violation required |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance and repeatable breakdown characteristics across production lots |
| 350 mW FR-4 power rating | Validated thermal performance without heatsinking - simplifies layout in space-constrained consumer and industrial PCBs |
| JEDEC-compliant reliability | Qualified to AEC-Q101 stress test standards - supports automotive-grade derivative part selection |
| Halogen- and antimony-free "Green" compound | Meets <900 ppm Br/Cl (<1500 ppm total), <1000 ppm Sb - satisfies global environmental compliance mandates |
| Lead-free and RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU - eliminates lead, cadmium, mercury, hexavalent chromium, PBB, PBDE |
Applications
| USB Port ESD Protection | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamping transient voltages on USB D+/D− lines during ESD events per IEC 61000-4-2. IC Role / Device Role: Bidirectional voltage clamp limiting line voltage to ±14 V while diverting >8 kV contact discharge energy. Use Value: Leverages 0.1 µA leakage and 15 Ω ZZT to minimize signal distortion and ensure fast response without loading data lines. |
Use Scenario: Generating a stable reset threshold for 3.3 V or 5 V microcontrollers during power-up and brownout conditions. IC Role / Device Role: Precision voltage reference feeding comparator input or integrated reset generator. Use Value: 13.3–14.7 V range allows clean separation from system rail voltages, avoiding false resets during marginal supply conditions. |
| Industrial Sensor Signal Conditioning | Low-Power IoT Node Power Rail Clamp |
|
Use Scenario: Protecting analog front-end inputs of 12-bit ADCs in 4–20 mA loop-powered sensors. IC Role / Device Role: Overvoltage limiter placed before instrumentation amplifier input stage. Use Value: 357 °C/W RθJA and −65 to +150 °C rating enable reliable operation in unventilated enclosures up to 85 °C ambient. |
Use Scenario: Safeguarding coin-cell–powered BLE/Wi-Fi modules against battery reversal or charger overvoltage. IC Role / Device Role: Reverse-polarity and overvoltage protection element in series with LDO input or directly across rail. Use Value: 350 mW rating and 0.008 g mass support ultra-low-power, size-sensitive wearable and sensor node designs. |
Availability
MMBZ5244BQ-7-F is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, industrial sensor conditioning, and low-power IoT node clamping requiring stable component supply with full traceability and lifecycle management.
Supply support for MMBZ5244BQ-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to the MMBZ52xxB family of 350 mW surface-mount zener diodes engineered for precision voltage reference and circuit protection in cost-sensitive, high-volume consumer, industrial, and automotive applications.
FAQ
What is the zener voltage tolerance for MMBZ5244BQ-7-F?
The MMBZ5244BQ-7-F has a nominal zener voltage of 14.0 V with a guaranteed range of 13.3 V to 14.7 V at 9.0 mA test current, representing ±5% tolerance. This specification is measured under standard JEDEC conditions at +25°C ambient and is documented in the Electrical Characteristics table of DS18011 Rev. 26-2.
Is MMBZ5244BQ-7-F qualified for automotive applications?
The base MMBZ5244BQ-7-F is not AEC-Q101 qualified; however, Diodes Incorporated offers automotive-grade equivalents with Q-suffix (e.g., MMBZ5244BQ-7-FQ) manufactured in IATF 16949 certified facilities and PPAP-capable. These variants undergo additional stress testing per AEC-Q101 requirements and are listed on Diodes' automotive products webpage.
What is the thermal resistance of MMBZ5244BQ-7-F, and how does it affect PCB layout?
MMBZ5244BQ-7-F has a junction-to-ambient thermal resistance (RθJA) of 357 °C/W when mounted on FR-4 PCB using Diodes' recommended pad layout. This value assumes no copper pour or thermal vias; adding thermal relief or ground-plane connections can reduce effective RθJA, but layout must follow the 2.0 mm × 2.9 mm pad dimensions specified in DS18011.
How does the "Q" in MMBZ5244BQ-7-F differ from MMBZ5244B-7-F?
The "Q" suffix denotes Diodes Incorporated's automotive-grade product marking convention, indicating the device is assembled/tested at qualified sites (Shanghai or Chengdu) and traceable to AEC-Q101-compliant processes. Electrically and physically identical to the standard version, the Q-marked variant enables PPAP submission and supports automotive BOMs requiring change control and lot-level traceability.
MMBZ5244BQ-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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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
MMBZ5244BQ-7-F FAQ
1.How can I place an order for MMBZ5244BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5244BQ-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 MMBZ5244BQ-7-F reliable?
The price and inventory of MMBZ5244BQ-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 MMBZ5244BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5244BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5244BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5244BQ-7-F?
MMBZ5244BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5244BQ-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 MMBZ5244BQ-7-F?
For technical support, including MMBZ5244BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5244BQ-7-F requirements.
6.How does Aetrix verify that MMBZ5244BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5244BQ-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 MMBZ5244BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5244BQ-7-F?
All MMBZ5244BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5244BQ-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 MMBZ5244BQ-7-F part is unused and in its original packaging.
Return procedure for MMBZ5244BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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