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Nexperia USA Inc. BZX84W-C9V1-QX
- Part No.:
- BZX84W-C9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C9V1-QX.pdf
- Description:
- DIODE ZENER 9.05V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,852
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Product details
Overview
BZX84W-C9V1-QX from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 9.1 V nominal Zener voltage at 5 mA, 150 °C maximum junction temperature, and 275 mW total power dissipation on FR4 PCB. It serves as a precision reference or overvoltage clamp in automotive power rails and low-power analog signal conditioning circuits.
For engineers reviewing the BZX84W-C9V1-QX datasheet, BZX84W-C9V1-QX pinout, BZX84W-C9V1-QX application, or BZX84W-C9V1-QX equivalent, key selection criteria include Zener voltage tolerance (±5 %), low reverse leakage (500 nA at VR = 6 V), differential resistance (100 Ω at IZ = 5 mA), and AEC-Q101 qualification for automotive use.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 9.1 V nominal Zener voltage is specified at 5 mA test current with ±5 % tolerance, and exhibits a positive temperature coefficient of +5.5 mV/K at that current, enabling predictable drift compensation in bias networks.
The device features a low 150 pF capacitance at 1 MHz and 0 V reverse bias, supporting high-frequency regulation up to several MHz. Its 455 K/W junction-to-ambient thermal resistance reflects standard FR4 mounting, and non-repetitive peak reverse power capability reaches 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; ±5 % tolerance ensures stable reference within 8.5–9.6 V range |
| Reverse Leakage (IR) | 500 nA at VR = 6 V; enables low-power standby regulation without excessive quiescent drain |
| Differential Resistance (rdiff) | 100 Ω max at IZ = 5 mA; defines voltage regulation stiffness against load current variation |
| Temperature Coefficient (SZ) | +5.5 mV/K at IZ = 5 mA; supports predictable thermal drift modeling in precision references |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4; sets maximum continuous DC power handling in standard layout |
| Junction Temperature (Tj) | 150 °C max; allows operation in under-hood automotive environments with adequate PCB copper |
| Package | SOT323 (SC-70); 3-terminal leadless surface-mount package with 0.65 mm pitch and 1.3 × 1.8 mm footprint |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads, 0.65 mm lead pitch, and 1.3 mm × 1.8 mm body dimensions. Designed for reflow soldering per JEDEC J-STD-020.
| 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.) | Internally unconnected; must remain floating-no PCB trace or thermal pad connection |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and carries regulated output current |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Low capacitance (150 pF) | Enables stable regulation in high-frequency feedback loops and RF bias networks |
| Wide Zener voltage range (2.4–75 V) | Supports standardized E24 series selection across diverse supply rail and reference needs |
| Low reverse leakage (500 nA @ 6 V) | Minimizes error current in precision voltage dividers and low-current sensor biasing |
| 150 °C junction rating | Permits operation in high-temperature automotive zones without derating below 125 °C ambient |
Applications
| Automotive Power Rail Clamping | Low-Power Sensor Reference |
|---|---|
|
Use Scenario: Clamp transient spikes on 12 V battery-supplied microcontroller I/O lines in vehicle infotainment modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt overvoltage energy into ground before IC damage occurs. Use Value: 9.1 V clamping threshold protects 5 V logic interfaces while surviving ISO 7637-2 pulse 5a surges due to AEC-Q101 stress qualification. |
Use Scenario: Provide stable 9.1 V reference for thermistor-based cabin temperature sensing circuit in HVAC control unit. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling and ratiometric measurement calibration. Use Value: ±5 % tolerance and +5.5 mV/K temperature coefficient allow accurate drift compensation in firmware, reducing calibration frequency. |
| Industrial PLC Input Protection | High-Frequency Bias Network |
|
Use Scenario: Protect 24 V digital input channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Overvoltage clamp placed between input terminal and internal protection diode network. Use Value: 275 mW power rating and 40 W non-repetitive surge capability absorb repetitive 1 kV/µs transients without degradation. |
Use Scenario: Bias gate voltage of RF MOSFET amplifier stages in 2.4 GHz wireless access point front-end modules. IC Role / Device Role / Timing Role: DC bias voltage generator with minimal AC coupling effect on RF path. Use Value: 150 pF capacitance at 1 MHz ensures negligible impedance (<100 Ω) above 10 MHz, preserving amplifier stability and gain flatness. |
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 % Zener voltage tolerance (8.92–9.28 V) vs. ±5 % (8.5–9.6 V); otherwise identical package, thermal, and electrical specs | Preferred where tighter regulation is required in precision analog feedback or metrology-grade references | Select when absolute voltage accuracy outweighs cost sensitivity; same footprint and layout compatibility |
| MMSZ5240B-TP | Same 9.1 V nominal, ±5 % tolerance, but SOD-123 package (larger, 2.7 × 1.6 mm); 500 mW Ptot; 350 Ω rdiff | Better thermal performance in high-derating industrial designs; unsuitable for ultra-dense automotive PCBs | Choose when higher power margin or legacy SOD-123 footprint compatibility is prioritized over board space |
Compared with BZX84W-C9V1-QX, the BZX84W-B9V1-Q offers tighter voltage control at identical size and cost premium, while MMSZ5240B-TP trades miniaturization for higher power and relaxed regulation-making each optimal for distinct trade-offs in accuracy, density, and thermal headroom.
Availability
BZX84W-C9V1-QX is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC input protection, and low-power sensor reference circuits requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.
Supply support for BZX84W-C9V1-QX 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum continuous forward current for BZX84W-C9V1-QX?
The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener regulation. Absolute maximum forward current is 200 mA per limiting values table, but sustained forward operation exceeds design intent and risks parametric shift or failure. Use only in reverse breakdown mode.
Does BZX84W-C9V1-QX require a series resistor in Zener regulation circuits?
Yes-a current-limiting resistor is mandatory to set the Zener test current (typically 5 mA) and prevent thermal runaway. For 12 V supply and 9.1 V output, a 560 Ω ±1 % resistor delivers ~5.2 mA, keeping power dissipation within the 275 mW limit and ensuring stable regulation.
How does the "QX" suffix differ from standard "Q" in BZX84W-C9V1-QX?
The "QX" suffix denotes Nexperia's enhanced automotive qualification grade, including extended reliability testing beyond AEC-Q101 baseline-such as additional temperature cycling, humidity bias, and mechanical shock validation-while maintaining identical electrical specs and SOT323 packaging as the standard "Q" version.
Can BZX84W-C9V1-QX be used in parallel for higher power handling?
No-Zener diodes exhibit manufacturing spread in VZ, causing current hogging and thermal imbalance. Parallel operation without individual ballast resistors risks premature failure of one device. For >275 mW, select a single higher-power Zener (e.g., BZX85C9V1) or active regulation solution.
BZX84W-C9V1-QX 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-QX FAQ
1.How can I place an order for BZX84W-C9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C9V1-QX 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-QX reliable?
The price and inventory of BZX84W-C9V1-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C9V1-QX?
BZX84W-C9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C9V1-QX 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-QX?
For technical support, including BZX84W-C9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C9V1-QX requirements.
6.How does Aetrix verify that BZX84W-C9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C9V1-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C9V1-QX?
All BZX84W-C9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C9V1-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZX84W-C9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C9V1-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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