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Nexperia USA Inc. BZX384-B11-QX
- Part No.:
- BZX384-B11-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B11-QX.pdf
- Description:
- DIODE ZENER 11V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,225
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Product details
Overview
BZX384-B11-QX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 11 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B11-QX datasheet, BZX384-B11-QX pinout, BZX384-B11-QX application, or BZX384-B11-QX equivalent, this page delivers verified electrical parameters, thermal resistance data, reverse current behavior at 10 V, differential resistance under regulation, and automotive-grade reliability context - all confirmed from Nexperia's official 2021 product data sheet.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable output by conducting reverse current above its 11 V Zener threshold. Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments where thermal cycling and long-term stability are critical.
It exhibits 150 Ω typical differential resistance at IZ = 5 mA and 0.1 mV/K temperature coefficient near 11 V, enabling predictable regulation drift across -65 °C to +150 °C ambient. Non-repetitive peak reverse power handling is 40 W for 100 μs pulses, supporting transient suppression in low-energy surge scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 10.80 V to 11.20 V at IZ = 5 mA - defines precise regulation point with ±2 % tolerance for stable reference generation |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous DC power limit for thermal design and board layout |
| Differential Resistance rdif | 150 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current IR | 20 μA max at VR = 8.8 V - quantifies leakage below knee voltage, critical for low-power standby circuits |
| Thermal Resistance Rth(j-a) | 415 K/W in free air - governs junction-to-ambient temperature rise under steady-state bias |
| Non-repetitive Peak Power | 40 W for tp = 100 μs - enables short-duration transient clamping without device failure |
| Junction Temperature Range | -65 °C to +150 °C - supports operation in extreme automotive under-hood conditions |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads; cathode marked by bar on top surface; footprint compatible with standard reflow soldering per Nexperia Fig. 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical stress testing |
| ±2 % voltage tolerance | Enables tighter system-level voltage margin control than ±5 % variants in precision biasing |
| 300 mW power rating | Supports continuous regulation in space-constrained SMD designs without forced cooling |
| 415 K/W junction-to-ambient Rth | Allows thermal modeling of self-heating on standard FR4 PCBs with single-sided copper |
| 150 °C max junction temperature | Permits reliable operation in high-temperature engine control units and body electronics |
Applications
| Automotive ECU Reference | Industrial Sensor Biasing |
|---|---|
Use Scenario: Providing stable 11 V reference for analog front-end comparators in engine control modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing accurate threshold for knock sensor signal conditioning. Use Value: ±2 % tolerance ensures consistent trip-point accuracy across temperature, reducing calibration drift in production ECUs. |
Use Scenario: Biasing bridge transducers in factory-floor pressure monitoring systems. IC Role / Device Role / Timing Role: Low-noise DC reference source for Wheatstone bridge excitation. Use Value: 150 Ω differential resistance minimizes load-induced voltage shift when sourcing <1 mA to bridge arms. |
| Power Supply Overvoltage Clamp | Low-Power Microcontroller Reset Circuit |
Use Scenario: Clamping 12 V rail surges in infotainment head units during load-dump events. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursion to safe levels for downstream ICs. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs spikes without degradation, preserving long-term reliability. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontrollers during brown-out recovery. IC Role / Device Role / Timing Role: Precision voltage detector element in discrete reset generator circuit. Use Value: 20 μA max reverse leakage at 8.8 V prevents false resets in battery-backed sleep modes consuming <1 μA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B10-Q | 10 V nominal breakdown (9.80–10.20 V), identical package and tolerance | Suitable where 10 V reference aligns with ADC input scaling or comparator thresholds | Select when system architecture requires exact 10 V regulation instead of 11 V |
| BZX384-B12-Q | 12 V nominal breakdown (11.80–12.20 V), same power and thermal specs | Preferred for 12 V rail monitoring or higher-threshold protection schemes | Choose for compatibility with legacy 12 V logic interfaces or higher-voltage clamp targets |
Compared with BZX384-B11-QX, the BZX384-B10-Q offers lower regulation voltage for tighter 10 V system margins, while BZX384-B12-Q provides higher threshold headroom for 12 V domain supervision - both retain identical thermal performance, AEC-Q101 qualification, and SOD323 footprint.
Availability
BZX384-B11-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, power supply overvoltage protection, and low-power microcontroller reset circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX384-B11-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 energy-efficient solutions.
The BZX384-Q series belongs to Nexperia's automotive-grade Zener diode portfolio, engineered specifically for robust voltage reference and transient suppression in harsh-environment electronic control units and sensor interfaces.
FAQ
What is the maximum reverse voltage before breakdown for BZX384-B11-QX?
The guaranteed breakdown occurs between 10.80 V and 11.20 V at 5 mA test current. Below 8.8 V, reverse current remains ≤20 μA - this is the practical upper limit for non-conducting operation. The device is not rated for sustained reverse bias above its specified VZ range.
Can BZX384-B11-QX be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device like the PZM11NB or implement active regulation instead.
Is the SOD323 package lead-free and RoHS compliant?
Yes - Nexperia confirms the BZX384-Q series uses lead-free terminations and complies with RoHS Directive 2011/65/EU and REACH SVHC regulations, as documented in their official compliance statements and material declarations.
How does temperature affect the 11 V regulation point?
At 11 V, the temperature coefficient is approximately +0.1 mV/K (positive slope), meaning VZ increases ~1.1 mV per °C rise in junction temperature. This is confirmed in Table 8 for the BZX384-B11-Q variant and impacts long-term reference stability in unregulated thermal environments.
BZX384-B11-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B11-QX FAQ
1.How can I place an order for BZX384-B11-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B11-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 BZX384-B11-QX reliable?
The price and inventory of BZX384-B11-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B11-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B11-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B11-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B11-QX?
BZX384-B11-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B11-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 BZX384-B11-QX?
For technical support, including BZX384-B11-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B11-QX requirements.
6.How does Aetrix verify that BZX384-B11-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B11-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 BZX384-B11-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B11-QX?
All BZX384-B11-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B11-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 BZX384-B11-QX part is unused and in its original packaging.
Return procedure for BZX384-B11-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B11-QX Tags
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