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Nexperia USA Inc. BZX84W-C9V1-QF
- Part No.:
- BZX84W-C9V1-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C9V1-QF.pdf
- Description:
- DIODE ZENER 9.05V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,999
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Product details
Overview
BZX84W-C9V1-QF from Nexperia is a ±5 % tolerance Zener diode in SOT323 (SC-70) package, rated for 9.1 V nominal regulation voltage at 5 mA, with 100 Ω differential resistance, 5.5 mV/K temperature coefficient, and 275 mW total power dissipation. It serves as a precision voltage reference or clamp in automotive power supply monitoring circuits.
For engineers reviewing the BZX84W-C9V1-QF datasheet, BZX84W-C9V1-QF pinout, BZX84W-C9V1-QF application, or BZX84W-C9V1-QF equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient stability over temperature, low leakage current (500 nA at 6 V), and AEC-Q101 qualification for under-hood environments.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 9.1 V nominal Zener voltage is specified at IZ = 5 mA with ±5 % tolerance, and exhibits a positive temperature coefficient of +5.5 mV/K - enabling predictable drift compensation in bias networks.
The device features a low 150 pF junction capacitance at 0 V and 1 MHz, supporting high-frequency decoupling and transient suppression. With 500 nA reverse leakage at VR = 6 V and 150 °C maximum junction temperature, it delivers reliable performance in thermally constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; defines precise clamping threshold in voltage regulation loops |
| Tolerance | ±5 % (C-grade); ensures predictable voltage margin for safety-critical automotive sensing |
| Differential Resistance (rdif) | 100 Ω max at IZ = 5 mA; determines output impedance and regulation stiffness |
| Temperature Coefficient (SZ) | +5.5 mV/K at IZ = 5 mA; enables accurate thermal drift modeling in wide-temperature designs |
| Reverse Leakage (IR) | 500 nA max at VR = 6 V; minimizes standby current loss in always-on subsystems |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets continuous DC power handling limit |
| Junction-to-Ambient Thermal Resistance | 455 K/W; defines thermal rise per watt in standard mounting configuration |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, 0.95 mm height, and tin-plated terminations compatible with reflow and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener operation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire or die connection; must remain unconnected |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Wide voltage range (2.4–75 V) | Enables single-family sourcing across multiple board-level regulation points |
| Low junction capacitance (150 pF) | Supports high-frequency noise suppression without signal integrity degradation |
| Two tolerance grades (±2 % / ±5 %) | Allows cost/performance trade-off between precision reference and general-purpose clamping |
| High surge capability (40 W non-repetitive) | Withstands transient overvoltage events such as load dump in 12 V systems |
Applications
| Automotive Power Monitoring | Industrial Sensor Biasing |
|---|---|
Use Scenario: Monitoring battery voltage in ADAS domain controllers during cold cranking (6–9 V range). IC Role / Device Role / Timing Role: Zener clamp protecting ADC input from overvoltage while providing stable reference for ratiometric scaling. Use Value: ±5 % tolerance and +5.5 mV/K coefficient allow calibrated offset correction across −40 °C to +125 °C ambient. |
Use Scenario: Providing stable bias voltage for MEMS pressure sensor front-end amplifiers in HVAC control modules. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed 9.1 V rail independent of supply ripple. Use Value: 100 Ω differential resistance ensures <10 mV droop under 1 mA load variation, maintaining sensor linearity. |
| USB-C Port Protection | Programmable Logic Supply Clamp |
Use Scenario: Clamping VBUS transients during hot-plug events in automotive infotainment USB hubs. IC Role / Device Role / Timing Role: Fast-response overvoltage protector limiting peak voltage to 9.1 V before TVS activation. Use Value: 40 W non-repetitive surge rating absorbs 100 µs pulses without degradation, extending system ESD robustness. |
Use Scenario: Stabilizing I/O bank voltage in FPGA-based telematics gateways operating near 9 V rails. IC Role / Device Role / Timing Role: Low-leakage (500 nA) shunt element preventing logic-level shift due to supply sag. Use Value: 150 pF capacitance avoids signal edge distortion on 10 MHz configuration clocks routed nearby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B9V1-Q | ±2 % tolerance, 80 Ω rdif, +5.5 mV/K SZ | Higher precision required for calibration references; tighter thermal drift control | Select when absolute voltage accuracy outweighs cost sensitivity in test equipment |
| MMSZ4687T1G | 9.1 V, ±5 %, SOD-123 package, 200 mW Ptot, 120 Ω rdif | Larger footprint; not AEC-Q101 qualified; lower surge rating (25 W) | Use only in non-automotive industrial controls where space and qualification are secondary |
Compared with BZX84W-C9V1-QF, the BZX84W-B9V1-Q offers tighter tolerance for metrology-grade references, while MMSZ4687T1G trades automotive qualification and thermal performance for legacy board compatibility - making the QF variant optimal for new AEC-compliant designs requiring compact, high-reliability clamping.
Availability
BZX84W-C9V1-QF is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, USB-C protection circuits, and programmable logic supply clamping requiring stable component supply across extended temperature ranges.
Supply support for BZX84W-C9V1-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 solutions with focus on efficiency and sustainability.
The BZX84W-Q series targets automotive-grade voltage regulation, combining AEC-Q101 qualification, tight parametric control, and miniature SOT323 packaging for space-constrained ECUs and ADAS modules.
FAQ
What is the maximum continuous reverse current this Zener can handle?
The BZX84W-C9V1-QF supports up to 200 mA forward current, but in Zener mode, its maximum continuous reverse current is limited by power dissipation: at 9.1 V, IZmax ≈ 275 mW / 9.1 V ≈ 30 mA at 25 °C ambient. Derating applies above 25 °C per the 455 K/W thermal resistance.
Is pin 2 truly unconnected, or does it serve a mechanical function?
Pin 2 is electrically not connected (n.c.) - no internal die connection exists. It serves only as a mechanical land for PCB alignment and solder joint reinforcement in the SOT323 package; routing traces to it introduces no electrical effect but may improve thermal mass distribution.
How does the +5.5 mV/K temperature coefficient impact circuit design?
The positive coefficient means VZ increases by ~5.5 mV per °C rise in junction temperature. For a 9.1 V Zener operating from −40 °C to +125 °C, total drift is ~907 mV - requiring either temperature compensation in feedback paths or system-level calibration if absolute voltage accuracy is critical.
Can this part replace older BZX84C9V1 devices in existing designs?
Yes - BZX84W-C9V1-QF maintains identical electrical specs and SOT323 footprint as legacy BZX84C9V1, but adds AEC-Q101 qualification, improved surge rating (40 W vs. 30 W), and tighter process control. No layout or schematic changes are needed for drop-in replacement in automotive upgrades.
BZX84W-C9V1-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):
- 9.05 V
- Tolerance:
- ±6.08%
- Power - Max:
- 275 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C9V1-QF FAQ
1.How can I place an order for BZX84W-C9V1-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C9V1-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-C9V1-QF reliable?
The price and inventory of BZX84W-C9V1-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-C9V1-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C9V1-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C9V1-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C9V1-QF?
BZX84W-C9V1-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C9V1-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-C9V1-QF?
For technical support, including BZX84W-C9V1-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C9V1-QF requirements.
6.How does Aetrix verify that BZX84W-C9V1-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C9V1-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-C9V1-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C9V1-QF?
All BZX84W-C9V1-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C9V1-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-C9V1-QF part is unused and in its original packaging.
Return procedure for BZX84W-C9V1-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C9V1-QF Tags
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