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Nexperia USA Inc. BZX84W-C4V7-QF
- Part No.:
- BZX84W-C4V7-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C4V7-QF.pdf
- Description:
- DIODE ZENER 4.7V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
BZX84W-C4V7-QF from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 4.7 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable voltage reference in low-power biasing, overvoltage protection, and signal clamping circuits.
For engineers reviewing the BZX84W-C4V7-QF datasheet, BZX84W-C4V7-QF pinout, BZX84W-C4V7-QF application, or BZX84W-C4V7-QF equivalent, this page delivers verified Zener parameters, automotive-grade reliability data, thermal resistance (455 K/W), reverse current (3 µA at VR = 2 V), and differential resistance (80 Ω at IZ = 5 mA) - all critical for precision regulation design.
Technical Context
This Zener diode operates in reverse breakdown with a nominal 4.7 V regulation voltage at 5 mA test current and exhibits a temperature coefficient of −1.4 mV/K, indicating negative thermal drift optimized for mid-range voltage references. Its differential resistance of 80 Ω at 5 mA ensures stable regulation under moderate load variation.
The device features a non-repetitive peak reverse power dissipation of 40 W for 100 µs pulses and is mounted on FR4 PCB with single-sided copper, defining its thermal performance envelope. With junction temperature rated up to 150 °C and storage range from −65 °C to +150 °C, it supports extended automotive ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.40 V to 5.00 V at IZ = 5 mA - defines regulation window for precision 4.7 V reference applications |
| Tolerance | ±5 % - specifies maximum deviation from nominal 4.7 V under standard test conditions |
| Differential Resistance (rdif) | 80 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Current (IR) | 3 µA at VR = 2 V - quantifies leakage in sub-breakdown region, critical for low-power standby circuits |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets continuous DC power limit for thermal design |
| Thermal Resistance (Rth(j-a)) | 455 K/W - links junction-to-ambient temperature rise per watt, essential for derating above 25 °C |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines anode-cathode drop during forward conduction, relevant for bidirectional clamping |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint, 0.65 mm pitch, and 0.1 mm max A1 height for automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated internal pad; no circuit function - must remain unconnected in layout |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as regulation output reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring stress-tested reliability |
| Low differential resistance | 80 Ω enables tight voltage regulation under dynamic load shifts in feedback networks and reference supplies |
| Negative temperature coefficient | −1.4 mV/K minimizes drift across operating temperature range, improving stability in ambient-varying environments |
| High-frequency suitability | 6 pF capacitance at 1 MHz and 0 V reverse bias supports noise suppression and RF decoupling in switching circuits |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Providing stable 4.7 V reference to analog front-end of temperature/pressure sensors in engine bay modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, maintaining sensor excitation voltage despite battery fluctuations. Use Value: Ensures <1 % measurement error over −40 °C to +125 °C ambient due to AEC-Q101 qualification and −1.4 mV/K temperature coefficient. |
Use Scenario: Clamping transient surges on USB VBUS line to protect downstream USB controller ICs. IC Role / Device Role / Timing Role: Shunt protection device conducting excess energy to ground when VBUS exceeds 4.7 V. Use Value: Limits clamping voltage to ≤5.0 V with 3 µA leakage at 2 V, minimizing standby power loss while enabling fast response to ESD events. |
| Low-Power IoT Node Reference | Industrial PLC Input Conditioning |
|
Use Scenario: Generating precise 4.7 V rail for ADC reference and microcontroller brown-out detection in battery-powered edge nodes. IC Role / Device Role / Timing Role: Passive voltage reference establishing threshold for supply monitoring and analog conversion. Use Value: Delivers 4.4–5.0 V regulation window with 275 mW power budget, supporting multi-year operation on coin-cell batteries. |
Use Scenario: Level-shifting and protecting 24 V digital inputs against field-wiring transients in factory automation controllers. IC Role / Device Role / Timing Role: Front-end clamp limiting input voltage swing to safe levels before optocoupler or logic interface. Use Value: Withstands 40 W non-repetitive surge (100 µs) and maintains <5 µA leakage below 2 V, ensuring long-term input integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5225BS-TP | 4.6 V nominal Zener voltage, ±5 % tolerance, 225 mW Ptot, SOT-323 package | Lower power rating reduces thermal margin in sustained 5 mA operation; identical pinout | Select when lower cost is prioritized and continuous dissipation remains <200 mW |
| Vishay BZX84-C4V7-TP | 4.7 V nominal, ±5 %, 300 mW Ptot, but not AEC-Q101 qualified | Lacks automotive qualification; unsuitable for under-hood or safety-critical systems | Prefer for industrial or consumer designs where AEC-Q101 is not mandated |
Compared with MMBZ5225BS-TP and BZX84-C4V7-TP, BZX84W-C4V7-QF uniquely combines AEC-Q101 qualification, 275 mW power handling, and −1.4 mV/K temperature coefficient - making it the only choice for automotive-qualified 4.7 V shunt regulation where thermal stability and reliability are non-negotiable.
Availability
BZX84W-C4V7-QF is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage protection, and low-power IoT node reference requiring stable component supply across production lifecycles.
Supply support for BZX84W-C4V7-QF 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
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for stable voltage reference and protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous Zener current for BZX84W-C4V7-QF at 85 °C ambient?
At 85 °C ambient, derating applies: Ptot = 275 mW × (1 − (85 − 25)/455) = ~175 mW. With VZ ≈ 4.7 V, maximum continuous IZ = 175 mW / 4.7 V ≈ 37 mA. This assumes FR4 PCB mounting per datasheet thermal model.
Can BZX84W-C4V7-QF be used in series for higher voltage regulation?
No - the BZX84W-C4V7-QF is not characterized or guaranteed for series operation. Differential resistance mismatch and thermal coupling between devices cause uneven voltage sharing and potential thermal runaway. Use a single higher-voltage Zener or dedicated regulator IC instead.
Is the n.c. pin (Pin 2) required to be grounded or left floating in PCB layout?
Pin 2 is internally not connected and must remain unconnected in both schematic and layout. Grounding or routing it introduces risk of solder bridging or unintended parasitic coupling; the datasheet explicitly defines it as "not connected" with no electrical function.
How does the −1.4 mV/K temperature coefficient affect regulation accuracy from −40 °C to +125 °C?
Over 165 K temperature span, total drift = −1.4 mV/K × 165 K = −231 mV. At nominal 4.7 V, this yields ±2.5 % variation relative to 25 °C value. Combined with ±5 % tolerance, worst-case regulation range is 4.17 V to 5.23 V across full temperature range.
BZX84W-C4V7-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6.38%
- Power - Max:
- 275 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C4V7-QF FAQ
1.How can I place an order for BZX84W-C4V7-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C4V7-QF 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 BZX84W-C4V7-QF reliable?
The price and inventory of BZX84W-C4V7-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C4V7-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C4V7-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C4V7-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C4V7-QF?
BZX84W-C4V7-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C4V7-QF 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 BZX84W-C4V7-QF?
For technical support, including BZX84W-C4V7-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C4V7-QF requirements.
6.How does Aetrix verify that BZX84W-C4V7-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C4V7-QF 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 BZX84W-C4V7-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C4V7-QF?
All BZX84W-C4V7-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C4V7-QF, 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 BZX84W-C4V7-QF part is unused and in its original packaging.
Return procedure for BZX84W-C4V7-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C4V7-QF Tags
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