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Diodes Incorporated BZX84B4V7Q-7-F
- Part No.:
- BZX84B4V7Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B4V7Q-7-F.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
BZX84B4V7Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance precision Zener diode in SOT23 package, with nominal zener voltage 4.7 V at 5 mA test current, 350 mW power dissipation, and 80 Ω dynamic impedance at IZT. It provides stable voltage reference and overvoltage protection in automotive power rail monitoring circuits.
For engineers reviewing the BZX84B4V7Q-7-F datasheet, BZX84B4V7Q-7-F pinout, BZX84B4V7Q-7-F application, or BZX84B4V7Q-7-F equivalent, key selection criteria include zener voltage tolerance (±2%), low dynamic impedance (80 Ω @ 5 mA), automotive qualification (AEC-Q101), thermal resistance (357 °C/W), and reverse leakage (3.0 µA @ 2.0 V).
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its 4.7 V nominal zener voltage is specified at 5 mA test current with ±2% tolerance, and exhibits a temperature coefficient of −3.5 mV/°C below 5 V and +0.2 mV/°C above - enabling predictable drift compensation in analog sensing paths.
The device delivers 350 mW maximum power dissipation when terminals are held at ambient temperature, with thermal resistance of 357 °C/W (junction-to-ambient). Its 80 Ω zener impedance at IZT and 500 Ω at knee current (IZK = 1.0 mA) ensures tight regulation in low-current biasing and feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.61–4.79 V range at 5 mA - enables precise 4.7 V rail clamping or reference generation |
| Power Dissipation (PD) | 350 mW - supports continuous operation in space-constrained automotive PCBs without forced cooling |
| Zener Impedance (ZZT) | 80 Ω at 5 mA - ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 3.0 µA at 2.0 V - guarantees low quiescent current in battery-backed voltage monitor circuits |
| Temperature Coefficient | −3.5 mV/°C (below 5 V), +0.2 mV/°C (above) - allows accurate thermal drift modeling in sensor signal conditioning |
| Package | SOT23 - surface-mount footprint compatible with high-speed automated placement and reflow |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SOT23 - three-terminal plastic-molded case with matte tin-plated alloy 42 leadframe; polarity indicated by cathode band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or low-impedance return path; defines reference node for voltage regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to supply rail or feedback point; maintains 4.7 V relative to anode during reverse bias |
| No-Connect (Pin 3) | Non-functional mechanical support terminal | Internally unconnected; serves only as structural reinforcement and thermal mass in SOT23 outline |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables single-supply 4.7 V reference without post-production trimming in automotive control modules |
| AEC-Q101 qualification | Validated for 1000+ hours HTOL, 1000-cycle temperature cycling, and ≥2 kV HBM ESD - suitable for engine control units |
| 350 mW power rating with 357 °C/W RθJA | Permits direct integration into 12 V automotive subsystems without heatsinking or derating below 85°C ambient |
| Low 3.0 µA reverse leakage at 2.0 V | Minimizes standby current draw in always-on vehicle network nodes (e.g., CAN transceiver bias networks) |
| Halogen- and antimony-free "Green" construction | Meets JESD201A Class 2 stress testing and EU RoHS 3 (2015/863/EU) - compliant for global Tier 1 automotive sourcing |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Sequencing |
|---|---|
Use Scenario: Regulating 4.7 V reference for microcontroller ADC input scaling in door module voltage monitors. IC Role / Device Role / Timing Role: Precision voltage reference diode providing stable bias for analog front-end circuitry. Use Value: ±2% VZ tolerance eliminates need for calibration in production, reducing test time and cost. |
Use Scenario: Clamping 5 V USB power rail during hot-swap events in head unit USB-C interface. IC Role / Device Role / Timing Role: Overvoltage protection element limiting transient excursions to safe levels. Use Value: 350 mW dissipation handles 100 ms surges up to 1.5 A without degradation per AEC-Q101 stress profiles. |
| ADAS Camera Power Supervision | Electric Power Steering (EPS) Sensor Biasing |
Use Scenario: Providing stable 4.7 V reference for image sensor analog gain control in surround-view camera ECUs. IC Role / Device Role / Timing Role: Low-drift voltage reference maintaining signal integrity across −40°C to +125°C operating range. Use Value: −3.5 mV/°C tempco enables <±15 mV total drift over full automotive temperature range. |
Use Scenario: Biasing Hall-effect position sensors in EPS motor control feedback loops. IC Role / Device Role / Timing Role: Low-leakage (3.0 µA @ 2 V) voltage clamp ensuring sensor offset stability during sleep mode. Use Value: Enables <1 µA total system sleep current compliance with ISO 16750-2 quiescent requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4704T1G | Same 4.7 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Larger footprint; higher power but looser tolerance - suited for non-critical industrial supplies | Select when board space permits larger package and ±5% VZ is acceptable for cost-sensitive designs |
| BZX84-C4V7 | Same SOT23 package, but ±5% tolerance and no AEC-Q101 qualification | Not qualified for automotive use; higher leakage (5 µA @ 2 V) | Acceptable for consumer-grade power management where automotive reliability is not required |
Compared with MMSZ4704T1G and BZX84-C4V7, BZX84B4V7Q-7-F uniquely combines automotive qualification, ±2% tolerance, and SOT23 footprint - making it the only option for space-constrained, safety-relevant 4.7 V references in AEC-Q101-compliant systems.
Availability
BZX84B4V7Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power sequencing, and ADAS camera power supervision requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84B4V7Q-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 centers across Asia and manufacturing in Taiwan and China.
This part belongs to the BZX84B series of AEC-Q101-qualified Zener diodes, engineered specifically for automotive voltage reference and protection applications demanding high reliability and tight parametric control.
FAQ
What is the maximum reverse voltage (VR) this Zener diode can withstand before breakdown?
The BZX84B4V7Q-7-F has a nominal zener voltage of 4.7 V at 5 mA test current, with guaranteed breakdown occurring between 4.61 V and 4.79 V. It is not rated for reverse blocking above its zener voltage - operation beyond this range induces controlled avalanche conduction, not destructive failure, provided power dissipation remains within 350 mW limits.
Is this part suitable for use in a 5 V logic rail clamp application?
Yes - with a 4.7 V nominal zener voltage and 3.0 µA reverse leakage at 2.0 V, it clamps transients above ~4.8 V while drawing negligible current during normal 5 V operation. Its 80 Ω dynamic impedance ensures fast response to short-duration spikes, and AEC-Q101 qualification confirms robustness against automotive load-dump and jump-start events.
How does the temperature coefficient affect performance in a wide-temperature automotive environment?
At 4.7 V, the device exhibits −3.5 mV/°C temperature coefficient below 5 V, resulting in approximately −35 mV drift from −40°C to +125°C ambient. This predictable linear drift allows system-level compensation in microcontroller firmware or analog circuit design, unlike uncharacterized diodes that may show nonlinear or undefined behavior across temperature.
Can this Zener diode replace a 5.1 V variant in an existing design?
No - the BZX84B4V7Q-7-F is specified at 4.7 V ±2%, not 5.1 V. Substituting it for a 5.1 V Zener would reduce clamping voltage by 400 mV, potentially causing premature triggering in overvoltage protection circuits or inaccurate biasing in reference networks. The correct replacement is BZX84B5V1Q-7-F, which shares identical qualification, package, and tolerance.
BZX84B4V7Q-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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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
BZX84B4V7Q-7-F FAQ
1.How can I place an order for BZX84B4V7Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B4V7Q-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 BZX84B4V7Q-7-F reliable?
The price and inventory of BZX84B4V7Q-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 BZX84B4V7Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B4V7Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B4V7Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B4V7Q-7-F?
BZX84B4V7Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B4V7Q-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 BZX84B4V7Q-7-F?
For technical support, including BZX84B4V7Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B4V7Q-7-F requirements.
6.How does Aetrix verify that BZX84B4V7Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B4V7Q-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 BZX84B4V7Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B4V7Q-7-F?
All BZX84B4V7Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B4V7Q-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 BZX84B4V7Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B4V7Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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