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Nexperia USA Inc. BZX84W-C11X
- Part No.:
- BZX84W-C11X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C11X.pdf
- Description:
- DIODE ZENER 11V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,399
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Product details
Overview
BZX84W-C11X from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 11 V breakdown voltage, 150 Ω differential resistance at 5 mA, and 7.4 mV/K positive temperature coefficient, designed for precision voltage reference and clamping in low-power analog circuits and power supply feedback paths.
For engineers reviewing the BZX84W-C11X datasheet, BZX84W-C11X pinout, BZX84W-C11X application, or BZX84W-C11X equivalent, this device supports stable 11 V regulation under 5 mA test current, operates up to 150 °C junction temperature, and delivers <100 nA reverse leakage at 8 V, making it suitable for high-reliability biasing and overvoltage protection in compact SMT designs.
Technical Context
This Zener diode operates in reverse-biased avalanche mode with a tightly controlled 10.4 V to 11.6 V working voltage range (±5 %), exhibiting a positive temperature coefficient of +7.4 mV/K at 5 mA, enabling predictable thermal drift compensation in reference circuits. Its 150 Ω dynamic impedance ensures minimal output voltage variation under load changes.
Designed for surface-mount use in SOT323 (SC-70) packaging, it achieves 275 mW total power dissipation on FR4 PCB with single-sided copper, and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses - critical for transient suppression in DC rails and signal lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal; 10.4–11.6 V range ensures ±5 % regulation accuracy for stable reference generation |
| Differential Resistance (rdif) | 150 Ω max at IZ = 5 mA; maintains tight output voltage stability against current fluctuations |
| Reverse Leakage (IR) | 100 nA max at VR = 8 V; enables low-power standby operation without significant quiescent loss |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; supports bidirectional clamping and low-loss forward conduction |
| Power Dissipation (Ptot) | 275 mW max on FR4 PCB; defines continuous thermal limit for board-level reliability in space-constrained layouts |
| Junction Temperature (Tj) | −55 °C to +150 °C operating range; supports industrial and extended-temperature applications without derating |
| Thermal Resistance (Rth(j-a)) | 455 K/W in free air; informs thermal design margin for ambient temperature rise in unforced convection environments |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, footprint optimized for reflow soldering per Figure 9 in datasheet Rev. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward conduction terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire or semiconductor connection - must remain floating |
| 3 | Cathode (K) | Zener breakdown terminal; connects to higher-potential node for reverse-biased regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective precision regulation without trimming, meeting mid-tier reference accuracy requirements |
| 150 Ω dynamic impedance at 5 mA | Reduces output voltage deviation under varying load currents, improving line and load regulation |
| Positive temperature coefficient (+7.4 mV/K) | Compensates for negative TC components in mixed-signal ICs when used in series reference topologies |
| 275 mW power rating on standard FR4 | Supports direct integration into 3.3 V/5 V/12 V rail monitoring without external heat sinking |
| 100 nA reverse leakage at 8 V | Minimizes standby current in battery-powered voltage supervisors and low-power reset circuits |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback loops using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element providing stable 11 V threshold for error amplifier bias and secondary-side sensing. Use Value: Delivers ±5 % regulation accuracy and 150 Ω impedance to maintain <1 % output voltage drift across 10–100 mA load steps. |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in motor driver interfaces. IC Role / Device Role / Timing Role: Bidirectional transient suppressor clamping signals between −0.9 V and +11 V relative to ground. Use Value: Limits voltage excursions within safe IO rail margins using <100 nA leakage and 0.9 V forward drop to prevent latch-up. |
| Reference Voltage Source | High-Frequency Bias Network |
|
Use Scenario: Generating stable bias points for op-amp input stages or ADC reference dividers in sensor signal chains. IC Role / Device Role / Timing Role: Precision shunt reference establishing fixed 11 V node for ratiometric scaling and offset calibration. Use Value: Provides +7.4 mV/K TC matching to compensate for amplifier offset drift, reducing system-level temperature error by >30 %. |
Use Scenario: Setting DC bias for RF amplifier transistors or high-speed comparator inputs in communication modules. IC Role / Device Role / Timing Role: Low-capacitance (2.5 pF) Zener stabilizing quiescent current while minimizing signal path loading. Use Value: Maintains stable 11 V gate/base bias with <2.5 pF junction capacitance, preserving >500 MHz small-signal bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B11 | ±2 % tolerance (10.8–11.2 V), 150 Ω rdif, same SOT323 package | Higher accuracy required for metrology-grade references; tighter TC spread (±0.2 mV/K) | Select when absolute voltage accuracy outweighs cost sensitivity; requires tighter layout control for thermal stability |
| MMSZ5240B | ±5 % tolerance (10.4–11.6 V), 170 Ω rdif, SOD-123 package, 500 mW Ptot | Higher power handling but larger footprint; 10× higher leakage (1 µA at 8 V) | Choose for higher-current clamping where board area permits; avoid in ultra-low-power or high-density designs |
Compared with BZX84W-C11X, BZX84W-B11 offers superior voltage accuracy at the expense of tighter thermal management, while MMSZ5240B trades off leakage and size for greater power robustness - making the C11X optimal for space-constrained, low-leakage 11 V reference needs.
Availability
BZX84W-C11X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and reference voltage source applications requiring stable component supply, consistent parametric performance, and long-term obsolescence mitigation.
Supply support for BZX84W-C11X 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective, space-efficient voltage regulation and clamping in consumer, industrial, and computing applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX84W-C11X?
The BZX84W-C11X has a nominal Zener voltage of 11 V with a guaranteed range of 10.4 V to 11.6 V at 5 mA test current. Breakdown occurs within this band; operation above 11.6 V risks exceeding the specified differential resistance and thermal limits, especially beyond the 275 mW power rating.
Can BZX84W-C11X be used in forward-biased mode?
Yes - its forward voltage is rated at ≤0.9 V at 10 mA, enabling use as a low-drop rectifier or clamping diode in bidirectional protection circuits. However, forward conduction is not its primary function; sustained forward current above 200 mA exceeds the absolute maximum rating and may cause thermal failure.
How does the 2.5 pF junction capacitance affect high-frequency performance?
At 1 MHz and 0 V reverse bias, the 2.5 pF capacitance introduces minimal reactance (>60 kΩ), allowing the device to maintain effective clamping up to ~500 MHz in RF bias networks. This low capacitance avoids signal distortion in high-speed analog front-ends and clock distribution paths.
Is BZX84W-C11X automotive-qualified?
No - per Nexperia's revision history (Rev. 2, Jan 2023), the BZX84W series is explicitly designated as non-automotive qualified. It lacks AEC-Q200 stress testing and automotive-grade screening; for automotive applications, Nexperia recommends its -Q qualified variants such as the BZX84W-C11-Q series.
BZX84W-C11X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C11X FAQ
1.How can I place an order for BZX84W-C11X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C11X 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-C11X reliable?
The price and inventory of BZX84W-C11X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C11X is usually 5 days.
3.What payment methods are accepted for BZX84W-C11X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C11X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C11X?
BZX84W-C11X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C11X 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-C11X?
For technical support, including BZX84W-C11X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C11X requirements.
6.How does Aetrix verify that BZX84W-C11X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C11X 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-C11X meets industry standards.
7.What is the process for return or replacement of BZX84W-C11X?
All BZX84W-C11X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C11X, 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-C11X part is unused and in its original packaging.
Return procedure for BZX84W-C11X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C11X Tags
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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
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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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