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Diodes Incorporated BZX84B15Q-7-F
- Part No.:
- BZX84B15Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B15Q-7-F.pdf
- Description:
- DIODE ZENER 15V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,953
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Product details
Overview
BZX84B15Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance, 15 V precision Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature and featuring 30 Ω maximum Zener impedance at 5 mA test current. It operates across –65°C to +150°C and delivers stable voltage reference in automotive power rail monitoring and ECU voltage regulation circuits.
For engineers reviewing the BZX84B15Q-7-F datasheet, BZX84B15Q-7-F pinout, BZX84B15Q-7-F application, or BZX84B15Q-7-F equivalent, this page provides verified electrical parameters, automotive-grade qualification status, thermal derating behavior, SOT23 terminal mapping, and direct-fit alternatives for voltage reference design in harsh-environment electronics.
Technical Context
This Zener diode functions as a two-terminal voltage reference device with sharp reverse breakdown at nominal 15.0 V (14.7–15.3 V range) under 5 mA test current. Its 9.2 mV/°C temperature coefficient ensures predictable drift over temperature, and its 0.1 µA maximum reverse leakage at 10.5 V supports low-power standby operation.
The device uses alloy-42 leadframe with matte tin plating and green molding compound compliant with RoHS 3 and halogen-free standards. Thermal resistance is 357 °C/W when terminals are held at ambient, enabling reliable operation up to 150°C junction temperature with appropriate PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.0 V nominal, 14.7–15.3 V range at 5 mA - defines precise clamping/reference level for 12 V automotive systems |
| Power Dissipation (PD) | 350 mW at ambient - sets maximum continuous power handling without forced cooling |
| Zener Impedance (ZZT) | 30 Ω max at 5 mA - determines output voltage stability under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA max at 10.5 V - enables ultra-low quiescent current in battery-backed circuits |
| Temp. Coefficient (αVZ) | +13.0 mV/°C - quantifies positive drift rate for thermal error budgeting in wide-temp designs |
| Package | SOT23 - surface-mount footprint compatible with automated pick-and-place and reflow |
| AEC-Q101 Qualified | Yes - validated for automotive electronic control units per stress-test requirements |
Pinout & Package
Package: SOT23 - three-terminal plastic surface-mount case with 0.915 mm body width, 2.40 mm length, and 0.40 mm thickness; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during Zener operation; polarity must match schematic symbol orientation |
| Cathode (Pin 2) | Reverse-biased Zener terminal | Connected to higher-potential node; carries full Zener current during regulation/clamping |
| No-connect / Heat sink (Pin 3) | Leadframe extension | Internally tied to cathode in standard construction; serves as thermal path and mechanical anchor |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables single-supply 15 V reference without post-production trimming in production ECUs |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control and transmission modules |
| Green, halogen-free construction | Meets EU RoHS 3 (2015/863/EU) and automotive OEM environmental compliance mandates |
| 350 mW power rating at ambient | Supports sustained 15 V regulation at up to 23 mA without heatsinking on FR-4 PCB |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control unit to detect undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and comparator threshold setting. Use Value: ±2% VZ tolerance ensures fault detection thresholds remain within 0.3 V across production lots and temperature. |
Use Scenario: Providing stable bias voltage for op-amp-based bridge sensor amplifiers in factory automation. IC Role / Device Role / Timing Role: Low-drift reference source for ratiometric signal conditioning circuitry. Use Value: +13.0 mV/°C tempco allows accurate compensation modeling over –40°C to +85°C operating range. |
| USB-C PD Adapter Feedback | Smart Meter Voltage Reference |
Use Scenario: Setting feedback voltage for secondary-side regulation in isolated USB-C power delivery adapters. IC Role / Device Role / Timing Role: Zener clamp in optocoupler feedback loop to maintain 15 V output accuracy. Use Value: 30 Ω ZZT minimizes output voltage variation under transient load steps up to 100 mA. |
Use Scenario: Generating reference for metrology-grade ADC in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Primary voltage reference for energy measurement subsystem calibration. Use Value: 0.1 µA IR at 10.5 V ensures <1 nW standby power draw, critical for battery-backed meter retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4685-TP (Micro Commercial) | 15 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Higher power but looser tolerance; requires larger PCB area and lacks AEC-Q101 validation | Select when cost-sensitive industrial designs prioritize power margin over automotive qualification |
| BZX84-C15 (Nexperia) | 15 V nominal, ±5% tolerance, 300 mW rating, SOT23 package, no AEC-Q101 | Same footprint but wider VZ spread and lower power; not qualified for automotive use | Acceptable for consumer-grade voltage clamping where ±5% tolerance and non-automotive reliability suffice |
Compared with MMSZ4685-TP and BZX84-C15, BZX84B15Q-7-F uniquely combines tight ±2% tolerance, AEC-Q101 qualification, and SOT23 compatibility-making it the only choice for production automotive voltage reference nodes requiring both precision and reliability assurance.
Availability
BZX84B15Q-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and smart energy meter production requiring stable component supply and long-term lifecycle support.
Supply support for BZX84B15Q-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 and manufacturing operations across Asia and the Americas.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-reliability voltage reference and overvoltage protection in automotive, industrial, and computing applications.
FAQ
What is the maximum continuous Zener current for BZX84B15Q-7-F at 25°C ambient?
The device supports up to 23.3 mA continuous Zener current at 25°C ambient, calculated from 350 mW / 15 V. Derating begins above 25°C per Figure 1, reaching 0 mW at 150°C ambient. This limit assumes terminals held at ambient temperature per Note 6.
Does BZX84B15Q-7-F have a defined cathode marking on the SOT23 package?
Yes - the SOT23 package features a single bar marking adjacent to Pin 2 (cathode), consistent with Diodes Incorporated's standard top-view marking convention shown in the datasheet diagram. The marking code "KY4" also appears adjacent to the bar.
How does the +13.0 mV/°C temperature coefficient impact voltage reference accuracy over temperature?
Over a –40°C to +125°C range, the coefficient causes approximately ±2.15 V total drift (165°C × 13.0 mV/°C), meaning the 15 V reference shifts from ~12.85 V to ~17.15 V. System-level compensation or tighter thermal management is required for sub-1% accuracy across that range.
Is BZX84B15Q-7-F suitable for use in life support equipment?
No - Diodes Incorporated explicitly prohibits use of this device in life support systems without prior written approval from its CEO, as stated in the "LIFE SUPPORT" notice on page 5 of DS36159 Rev. 3-2. It is not certified for implantable or safety-critical medical applications.
BZX84B15Q-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10.5 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
BZX84B15Q-7-F FAQ
1.How can I place an order for BZX84B15Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B15Q-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 BZX84B15Q-7-F reliable?
The price and inventory of BZX84B15Q-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 BZX84B15Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B15Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B15Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B15Q-7-F?
BZX84B15Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B15Q-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 BZX84B15Q-7-F?
For technical support, including BZX84B15Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B15Q-7-F requirements.
6.How does Aetrix verify that BZX84B15Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B15Q-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 BZX84B15Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B15Q-7-F?
All BZX84B15Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B15Q-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 BZX84B15Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B15Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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