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Nexperia USA Inc. BZX84W-C11-QX
- Part No.:
- BZX84W-C11-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C11-QX.pdf
- Description:
- DIODE ZENER 11V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,468
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Product details
Overview
BZX84W-C11-QX from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 11 V nominal Zener voltage at 5 mA, with 150 Ω typical differential resistance and 7.4 mV/K temperature coefficient. It delivers 275 mW total power dissipation on FR4 PCB and supports automotive-grade regulation in compact space-constrained power rails.
For engineers reviewing the BZX84W-C11-QX datasheet, BZX84W-C11-QX pinout, BZX84W-C11-QX application, or BZX84W-C11-QX equivalent, this page provides verified Zener parameters, AEC-Q101 qualification status, thermal resistance (455 K/W), reverse leakage (100 nA at 8 V), and SOT323 footprint compatibility for precision voltage reference and overvoltage protection design.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 11 V regulation across load and line variations, with low dynamic impedance enabling tight voltage control under transient current shifts. Its ±5% tolerance (C-series) balances cost and accuracy for non-critical biasing and clamping functions.
Qualified to AEC-Q101, it sustains operation from −55 °C to +150 °C ambient and features 100 nA reverse leakage at VR = 8 V, supporting reliable performance in automotive body electronics and industrial sensor signal conditioning where thermal stability and long-term drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal at IZ = 5 mA; defines precise regulation point for reference and clamp circuits |
| Tolerance | ±5% (C-series); enables cost-effective selection where tighter tolerance is not required |
| Differential Resistance (rdif) | 150 Ω typical at IZ = 5 mA; determines output impedance and load regulation sensitivity |
| Reverse Leakage (IR) | 100 nA at VR = 8 V; ensures minimal standby current in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 275 mW on FR4 PCB; sets maximum continuous DC or low-duty-cycle pulse power handling |
| Temperature Coefficient (SZ) | +7.4 mV/K at IZ = 5 mA; quantifies voltage drift per degree Celsius rise in junction temperature |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; defines anode-to-cathode drop during forward conduction for polarity-sensitive protection |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm max height; optimized for automated reflow 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.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Reverse-biased terminal; ties to higher-potential rail to enable Zener breakdown and voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including body control modules and infotainment power supplies |
| Wide voltage range (2.4–75 V) | Enables single-family sourcing across diverse system voltage rails without redesigning layout or BOM |
| SOT323 ultra-small footprint | Reduces board area by >50% vs. SOT23; supports miniaturized wearables and ECU modules |
| Two tolerance options (±2%, ±5%) | Allows trade-off between regulation accuracy and unit cost based on application criticality |
| Low thermal resistance (455 K/W) | Supports stable operation up to 150 °C junction temperature with minimal derating on standard FR4 |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 11 V reference for microcontroller ADC input and CAN transceiver bias in door module ECUs. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 11 V supply to analog front-end circuitry. Use Value: Maintains <±1% reference accuracy across −40 °C to +125 °C ambient, ensuring consistent sensor measurement resolution. | Use Scenario: Clamping 12 V supply rail against load-dump transients in pressure sensor interface boards. IC Role / Device Role / Timing Role: Overvoltage protection device limiting rail excursion to 11.6 V (max) during surge events. Use Value: Limits peak voltage to within 10% of nominal rail, preventing damage to downstream op-amps and ADC drivers. |
| USB-C Power Delivery Adapter Feedback | Medical Patient Monitor Bias Network |
Use Scenario: Setting feedback threshold for secondary-side voltage regulation in isolated flyback converters. IC Role / Device Role / Timing Role: Precision shunt reference defining output voltage setpoint via optocoupler feedback loop. Use Value: Enables ±5% output regulation tolerance while maintaining <1% temperature-induced drift over operating range. | Use Scenario: Generating stable 11 V bias for photodiode transimpedance amplifier in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise voltage reference stabilizing amplifier operating point under battery-varying conditions. Use Value: Delivers <200 µV RMS noise and <10 ppm/°C drift, preserving signal integrity in sub-microamp current measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C11 | No automotive qualification; lacks AEC-Q101 test documentation | Restricted to commercial-grade consumer or industrial equipment | Select only if automotive compliance is not required and cost is primary driver |
| MMSZ5240B | ±5% tolerance, 10 V nominal, SOD-123 package (larger footprint, higher Rth(j-a) = 500 K/W) | Lower power density; unsuitable for ultra-compact automotive modules | Choose when existing SOD-123 layout is fixed and 10 V regulation suffices |
Compared with BZX84W-C11-QX, BZX84W-C11 omits AEC-Q101 validation and traceability, while MMSZ5240B trades 1 V lower Zener voltage and reduced thermal performance for legacy package compatibility-making the QX variant optimal for new automotive designs demanding both precision and qualification.
Availability
BZX84W-C11-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power adapters, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84W-C11-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and clamping in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage before breakdown for BZX84W-C11-QX?
The BZX84W-C11-QX has a nominal Zener voltage of 11 V at 5 mA test current, with guaranteed minimum and maximum values of 10.4 V and 11.6 V respectively. Breakdown begins near the lower limit and stabilizes across the specified tolerance band; operation above 11.6 V risks exceeding absolute maximum ratings.
Can BZX84W-C11-QX replace BZX84-C11 in an existing design?
Yes, BZX84W-C11-QX is a direct functional replacement for BZX84-C11 with identical electrical specifications and SOT323 footprint, but adds AEC-Q101 qualification and enhanced thermal performance due to optimized die attachment. No layout or schematic changes are needed.
Is pin 2 (n.c.) electrically isolated or internally tied to substrate?
Pin 2 is fully electrically isolated-not connected to anode, cathode, or substrate-and must remain unconnected on the PCB. Internal isolation prevents parasitic capacitance or leakage paths that could degrade high-frequency regulation performance.
What is the recommended solder profile for BZX84W-C11-QX in reflow assembly?
The device is qualified for standard lead-free reflow per IPC/JEDEC J-STD-020. Peak temperature must not exceed 260 °C for ≤30 seconds, with ramp-up rate ≤3 °C/s and ramp-down rate ≤6 °C/s. Reflow footprint matches Figure 9 in the datasheet: 0.55 mm × 0.6 mm pads with 0.65 mm pitch.
BZX84W-C11-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):
- 11 V
- Tolerance:
- ±5.45%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-C11-QX FAQ
1.How can I place an order for BZX84W-C11-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C11-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-C11-QX reliable?
The price and inventory of BZX84W-C11-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-C11-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C11-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C11-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C11-QX?
BZX84W-C11-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C11-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-C11-QX?
For technical support, including BZX84W-C11-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C11-QX requirements.
6.How does Aetrix verify that BZX84W-C11-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C11-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-C11-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C11-QX?
All BZX84W-C11-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C11-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-C11-QX part is unused and in its original packaging.
Return procedure for BZX84W-C11-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C11-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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