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Nexperia USA Inc. BZX384-A10-QX
- Part No.:
- BZX384-A10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A10-QX.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:767
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Product details
Overview
BZX384-A10-QX from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 10 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-A10-QX datasheet, BZX384-A10-QX pinout, BZX384-A10-QX application, or BZX384-A10-QX equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight voltage tolerance and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 10 V reference across its terminals under regulated current conditions (IZ = 5 mA), with differential resistance of 150 Ω max and temperature coefficient of +0.2 mV/K at IZ = 5 mA. Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits thermal resistance from junction to ambient of 415 K/W and junction-to-solder-point of 110 K/W, enabling reliable operation up to 150 °C junction temperature in constrained automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 9.4 V to 10.6 V at IZ = 5 mA - defines usable regulation window for 10 V nominal reference |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance (rdif) | ≤150 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤20 μA at VR = 7.6 V - ensures low leakage below knee voltage in standby or sensing modes |
| Temperature Coefficient (SZ) | +0.2 mV/K at IZ = 5 mA - quantifies drift rate of VZ over operating temperature range |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - relevant for polarity-check or dual-function circuit integration |
| Non-repetitive Peak Power | 40 W at tp = 100 μs - supports transient surge suppression in automotive load-dump scenarios |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar on top surface; dimensions 1.8 mm × 1.35 mm × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias terminal where voltage is stabilized |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±1 % voltage tolerance | Enables high-accuracy voltage references without external trimming in safety-critical subsystems |
| Low thermal resistance (Rth(j-sp) = 110 K/W) | Improves power handling margin during pulsed operation by efficient heat transfer to solder joint |
| Non-repetitive 40 W surge rating | Withstands ISO 7637-2 pulse 1 and pulse 2 transients without degradation in vehicle systems |
| SOD323 footprint compatibility | Supports automated placement and reflow soldering in high-volume automotive PCB assembly |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamping | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizes 10 V reference for microcontroller ADC inputs and analog front-end comparators in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise, low-drift reference under varying battery voltage (9–16 V) and temperature (-40 °C to +125 °C). Use Value: Maintains <±0.5 % reference accuracy across temperature, ensuring consistent fuel injection timing and knock detection thresholds. |
Use Scenario: Biases resistive temperature detector (RTD) bridges and sets threshold voltages for overtemperature shutdown in motor drives. IC Role / Device Role / Timing Role: Precision Zener element establishing stable excitation voltage for Wheatstone bridge configurations. Use Value: Limits measurement error to <0.1 °C due to ±1 % VZ tolerance and +0.2 mV/K TC, improving thermal control resolution. |
| Automotive Infotainment System Voltage Monitoring | Medical Diagnostic Equipment Reference Stability |
Use Scenario: Monitors 12 V supply integrity in head unit power management, triggering brown-out reset when voltage drops below 10.5 V. IC Role / Device Role / Timing Role: Reverse-biased Zener used in comparator input network to detect undervoltage events. Use Value: Enables accurate trip point setting with 0.2 V hysteresis margin, preventing false resets during cranking transients. |
Use Scenario: Provides stable 10 V reference for analog-to-digital conversion of ECG signal amplifiers in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise shunt regulator isolating sensitive analog signal chain from noisy digital supply domains. Use Value: Reduces reference-induced noise floor by 12 dB compared to generic ±5 % Zeners, preserving 16-bit effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B10-Q | ±2 % tolerance (9.8 V–10.2 V), higher IR (≤50 μA at VR = 7.6 V) | Acceptable for non-critical biasing where cost is prioritized over precision | Select when ±2 % regulation suffices and AEC-Q101 compliance remains mandatory |
| MMSZ4689T1G | ±5 % tolerance (9.5 V–10.5 V), 500 mW Ptot, SOD-123 package | Higher power handling but looser tolerance and non-automotive-qualified | Choose only for industrial prototypes requiring higher continuous dissipation and no automotive certification |
Compared with BZX384-B10-Q and MMSZ4689T1G, the BZX384-A10-QX delivers tighter voltage control and guaranteed automotive qualification-critical for functional safety compliance in ASIL-B systems-while maintaining identical SOD323 footprint and thermal performance.
Availability
BZX384-A10-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical diagnostic equipment manufacturing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for BZX384-A10-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient protection in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the maximum continuous reverse current the BZX384-A10-QX can sustain at 25 °C ambient?
The device is rated for a maximum forward current of 250 mA, but as a Zener regulator, its continuous reverse (breakdown) current is limited by power dissipation. At 25 °C ambient and 10 V VZ, the absolute maximum continuous Zener current is 30 mA (300 mW ÷ 10 V), assuming ideal heatsinking. Derating applies above 25 °C per the Rth(j-a) = 415 K/W specification.
How does the +0.2 mV/K temperature coefficient affect regulation accuracy over -40 °C to +125 °C?
Over this 165 K range, the total VZ drift is +33 mV (0.2 mV/K × 165 K), resulting in a worst-case shift from 9.4 V to 9.433 V or 10.6 V to 10.633 V. This represents <±0.33 % additional error beyond initial ±1 % tolerance, well within typical automotive reference stability requirements.
Can BZX384-A10-QX be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients at low voltages and positive above ~5.6 V, but BZX384-A10-QX has a +0.2 mV/K coefficient and cannot be reliably paralleled due to mismatched VZ and thermal coupling issues. For higher power, use a single higher-rated device or active regulation instead.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes-the device is qualified for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C. The recommended footprint matches Nexperia's Fig. 12 layout: 0.5 mm pad width, 1.1 mm pad length, 1.65 mm center-to-center spacing, and 0.6 mm solder mask opening per pad.
BZX384-A10-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):
- 10 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 7 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-A10-QX FAQ
1.How can I place an order for BZX384-A10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A10-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-A10-QX reliable?
The price and inventory of BZX384-A10-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-A10-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A10-QX?
BZX384-A10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A10-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-A10-QX?
For technical support, including BZX384-A10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A10-QX requirements.
6.How does Aetrix verify that BZX384-A10-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A10-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-A10-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A10-QX?
All BZX384-A10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A10-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-A10-QX part is unused and in its original packaging.
Return procedure for BZX384-A10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A10-QX Tags
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