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Diodes Incorporated BZX84B9V1-7-F
- Part No.:
- BZX84B9V1-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B9V1-7-F.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,864
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Product details
Overview
BZX84B9V1-7-F from Diodes Incorporated is a precision 9.1 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 15 Ω dynamic impedance at 5 mA test current and 0.5 µA maximum reverse leakage at 6.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the BZX84B9V1-7-F datasheet, BZX84B9V1-7-F pinout, BZX84B9V1-7-F application, or BZX84B9V1-7-F equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (357 °C/W), junction temperature range (−65 to +150 °C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown when cathode voltage exceeds anode by ≥9.1 V. Its ±2% VZ tolerance and low 15 Ω Zener impedance at IZT = 5 mA ensure tight regulation under moderate load variations.
Thermal derating follows a linear curve from 350 mW at 25°C to zero at 150°C ambient, with RθJA = 357 °C/W under specified mounting conditions. The −65°C to +150°C operating range supports industrial and automotive environments where thermal cycling and extended temperature operation are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.92–9.28 V range at 5 mA - enables precise 9 V rail clamping or reference generation |
| Power Dissipation | 350 mW at 25°C ambient - sets maximum continuous power handling before thermal shutdown |
| Zener Impedance (ZZT) | 15 Ω at 5 mA - determines output voltage stability under small-signal load transients |
| Reverse Leakage (IR) | 0.5 µA max at 6.0 V - ensures minimal quiescent current in high-impedance bias networks |
| Temperature Coefficient | +7.0 mV/°C - quantifies positive VZ drift with rising junction temperature |
| Junction Temp Range | −65°C to +150°C - supports operation in under-hood automotive and industrial control enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements including HTOL and TC |
Pinout & Package
Package: SOT23 - surface-mount plastic case with matte tin-plated terminals, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / Reference ground node | Connected to system ground or lower-potential rail during Zener operation |
| Cathode (Pin 2) | Reverse breakdown terminal / Regulated output node | Provides stable 9.1 V relative to anode when reverse biased above VZ |
| No-Connect (Pin 3) | Internal die attach pad / Thermal relief path | Not electrically connected; used for mechanical anchoring and heat conduction to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Reduces need for post-production trimming in voltage reference designs |
| AEC-Q101 qualification | Validates suitability for automotive body electronics and infotainment power rails |
| SOT23 footprint | Enables automated placement and reflow soldering on high-density PCBs |
| Lead-free & halogen-free construction | Meets RoHS 3 (2015/863/EU) and automotive ELV Directive compliance requirements |
| 357 °C/W thermal resistance | Allows 350 mW operation with ≤125°C junction rise above 25°C ambient |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 9 V reference for LIN bus transceiver biasing and microcontroller ADC reference in BCMs. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage protection clamp for 9 V supply rail. Use Value: ±2% VZ tolerance eliminates calibration steps; AEC-Q101 qualification ensures field reliability across temperature cycles. |
Use Scenario: Providing regulated 9.1 V bias to op-amp input stages in 4–20 mA loop-powered sensor transmitters. IC Role / Device Role / Timing Role: Low-drift Zener reference source for analog front-end gain-setting networks. Use Value: 7.0 mV/°C tempco allows predictable compensation; 0.5 µA leakage minimizes error in high-impedance feedback paths. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Power Monitoring |
Use Scenario: Secondary-side voltage sensing in isolated flyback adapters to regulate 9 V output via optocoupler feedback. IC Role / Device Role / Timing Role: Zener-based voltage comparator threshold for feedback loop error detection. Use Value: 15 Ω ZZT ensures fast response to output overvoltage events; SOT23 size fits compact secondary-side layouts. |
Use Scenario: Monitoring 9 V backup battery voltage in portable ultrasound units to trigger low-battery alerts. IC Role / Device Role / Timing Role: Low-leakage voltage threshold detector in battery health monitoring circuitry. Use Value: 0.5 µA IR at 6 V preserves battery life over multi-year deployments; −65°C to +150°C range covers sterilization and storage extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240B-7-F | 10 V nominal, ±5% tolerance, 350 mW, 17 Ω ZZT at 20 mA | Higher test current (20 mA vs. 5 mA); looser tolerance reduces precision in reference use | Select when cost-sensitive designs tolerate wider voltage variation and higher bias current |
| BZX84-C9V1-7-F | Same 9.1 V nominal but ±5% tolerance, non-AEC-Q101, identical SOT23 package | Lacks automotive qualification and tighter tolerance; suitable only for commercial-grade systems | Choose for non-automotive applications where AEC-Q101 is not mandated and cost is prioritized |
Compared with MMBZ5240B-7-F and BZX84-C9V1-7-F, BZX84B9V1-7-F delivers superior voltage accuracy (±2% vs. ±5%) and automotive qualification-critical for safety-critical voltage monitoring where regulation stability directly impacts system integrity.
Availability
BZX84B9V1-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, consumer power adapter feedback circuits, and medical diagnostic equipment power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84B9V1-7-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 devices, with design, manufacturing, and distribution operations across Asia, Europe, and the Americas.
This part belongs to the BZX84B series of precision Zener diodes, engineered specifically for high-reliability voltage reference and clamping in automotive and industrial applications demanding tight tolerance and AEC-Q101 validation.
FAQ
What is the maximum continuous power dissipation for BZX84B9V1-7-F at 70°C ambient?
At 70°C ambient, the device's power dissipation must be derated linearly from 350 mW at 25°C to zero at 150°C. Using the 357 °C/W thermal resistance, the allowable power is 350 mW × (1 − (70 − 25)/125) = 245 mW. This ensures junction temperature remains within −65°C to +150°C limits.
Does BZX84B9V1-7-F support reflow soldering per J-STD-020?
Yes. The device is qualified for lead-free reflow soldering per J-STD-020, with a moisture sensitivity level of 1 and matte tin-plated terminals compatible with standard Pb-free reflow profiles up to 260°C peak temperature. No pre-baking is required prior to assembly.
How does the +7.0 mV/°C temperature coefficient affect voltage reference accuracy?
The +7.0 mV/°C coefficient means VZ increases by 7 mV per degree Celsius rise in junction temperature. Over a 100°C rise (e.g., from 25°C to 125°C), this adds +0.7 V drift-requiring thermal design mitigation or system-level compensation in high-precision references.
Is BZX84B9V1-7-F suitable for use in life support devices?
No. Per Diodes Incorporated's Life Support Notice, this device is explicitly not authorized for use in life support systems without written CEO approval. Its qualification covers automotive and industrial applications-not implantable or critical patient-monitoring functions where failure could cause injury.
BZX84B9V1-7-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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84B9V1-7-F FAQ
1.How can I place an order for BZX84B9V1-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B9V1-7-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 BZX84B9V1-7-F reliable?
The price and inventory of BZX84B9V1-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B9V1-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B9V1-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B9V1-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B9V1-7-F?
BZX84B9V1-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B9V1-7-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 BZX84B9V1-7-F?
For technical support, including BZX84B9V1-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B9V1-7-F requirements.
6.How does Aetrix verify that BZX84B9V1-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B9V1-7-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 BZX84B9V1-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B9V1-7-F?
All BZX84B9V1-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B9V1-7-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 BZX84B9V1-7-F part is unused and in its original packaging.
Return procedure for BZX84B9V1-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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