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Nexperia USA Inc. BZX384-A10X
- Part No.:
- BZX384-A10X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A10X.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
BZX384-A10X 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 150 °C maximum junction temperature. It provides stable reference voltage in low-power analog circuits, power supply feedback paths, and overvoltage protection nodes.
For engineers reviewing the BZX384-A10X datasheet, BZX384-A10X pinout, BZX384-A10X application, or BZX384-A10X equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts for precision voltage regulation design.
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse-breakdown characteristics at 10 V (IZ = 5 mA), differential resistance ≤150 Ω, and temperature coefficient of +4.5 mV/K. Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses.
Designed for surface-mount operation on FR4 PCBs with single-sided copper, it exhibits Rth(j-a) = 415 K/W and Rth(j-sp) = 110 K/W, enabling reliable thermal performance in compact consumer and industrial electronics where space and power constraints are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 9.90 V to 10.10 V at IZ = 5 mA - ensures tight 10 V reference under standard test conditions |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 board |
| 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 - confirms low leakage below knee voltage for stable biasing |
| Temperature Coefficient (SZ) | +4.5 mV/K at IZ = 5 mA - quantifies drift rate per degree Celsius for thermal stability analysis |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - specifies conduction threshold when used in forward-biased clamp roles |
| Junction Temperature (Tj) | −65 °C to +150 °C - sets operational envelope for reliability in extended ambient environments |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; marking bar denotes cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % voltage tolerance | Enables high-accuracy reference generation without post-calibration in precision analog stages |
| 300 mW power rating | Supports robust regulation in low-current (<25 mA) feedback loops and sensing circuits |
| Non-repetitive 40 W surge capability | Provides transient overvoltage clamping for ESD and line-spike suppression up to 100 μs |
| SOD323 footprint compatibility | Allows direct integration into space-constrained PCB layouts with standardized reflow profiles |
| 150 °C max junction temperature | Ensures long-term reliability in thermally demanding applications such as enclosed power modules |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Zener diode provides precise 10 V reference to optocoupler input or TL431 control pin. Use Value: Tight ±1 % tolerance maintains output accuracy within ±0.5 % across line/load variations. |
Use Scenario: Clamping transient surges on 12 V automotive accessory rails or industrial I/O lines. IC Role / Device Role / Timing Role: Reverse-biased BZX384-A10X conducts only above 10.1 V, diverting excess energy to ground. Use Value: 40 W non-repetitive pulse rating absorbs 100 μs spikes without degradation. |
| Voltage Reference | Signal Level Shifting |
|
Use Scenario: Generating stable bias points for op-amp comparators or ADC reference dividers. IC Role / Device Role / Timing Role: Functions as a low-noise, low-drift 10 V source in sensor signal conditioning chains. Use Value: +4.5 mV/K temperature coefficient enables predictable drift compensation in calibration routines. |
Use Scenario: Translating logic-level signals between 3.3 V microcontrollers and 10 V analog front-ends. IC Role / Device Role / Timing Role: Forward-biased anode-cathode path drops ~0.9 V at 10 mA, enabling simple level translation. Use Value: Low VF consistency supports repeatable offset addition without external resistors. |
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 | ±2 % tolerance (9.80 V–10.20 V), otherwise identical package and ratings | Acceptable where 10 V accuracy < ±2 % suffices; lower cost tier | Select when tighter tolerance is unnecessary and BOM cost optimization is prioritized |
| MMSZ4686 | 10 V nominal, ±5 % tolerance, SOD-123 package, 500 mW Ptot | Higher power handling but looser tolerance and larger footprint | Choose for higher continuous power needs where board area permits SOD-123 layout |
Compared with BZX384-B10 and MMSZ4686, BZX384-A10X offers the narrowest voltage tolerance in the smallest footprint, making it optimal for space-constrained, high-accuracy regulation-whereas BZX384-B10 trades precision for cost, and MMSZ4686 trades size and tolerance for thermal margin.
Availability
BZX384-A10X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision voltage reference applications requiring stable component supply, consistent parametric performance, and long-term sourcing continuity.
Supply support for BZX384-A10X 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 small-signal diodes, MOSFETs, and ESD protection components.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for low-power, high-stability voltage reference and clamping in consumer, industrial, and computing electronics.
FAQ
What is the maximum continuous reverse current for BZX384-A10X at 25 °C?
The maximum continuous reverse current is not specified as a standalone parameter; instead, the device is rated for 300 mW total power dissipation at Tamb ≤ 25 °C. At 10 V breakdown, this corresponds to a maximum average Zener current of 30 mA under steady-state conditions with adequate PCB thermal relief.
Can BZX384-A10X be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current imbalance and thermal runaway when paralleled. For higher power, use a single higher-rated device like MMSZ4686 or implement active regulation with a transistor-based shunt.
Is BZX384-A10X suitable for automotive applications?
No-this part is non-automotive qualified per Nexperia's revision history (Rev. 4, Jan 2023). It lacks AEC-Q101 qualification and automotive-grade screening. For automotive use, select the -Q qualified variants such as BZX384-A10-Q or equivalent automotive Zeners.
How does the 100 μs 40 W surge rating translate to practical PCB layout?
This rating assumes a single 100 μs square-wave pulse at Tj = 25 °C prior to surge. Layout must minimize trace inductance and ensure solid cathode grounding; use short, wide traces and avoid vias in the surge path to prevent voltage overshoot exceeding the 10.1 V breakdown limit.
BZX384-A10X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- 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):
- 10 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A10X FAQ
1.How can I place an order for BZX384-A10X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A10X 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-A10X reliable?
The price and inventory of BZX384-A10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A10X is usually 5 days.
3.What payment methods are accepted for BZX384-A10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A10X?
BZX384-A10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A10X 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-A10X?
For technical support, including BZX384-A10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A10X requirements.
6.How does Aetrix verify that BZX384-A10X is sourced from the original manufacturer or authorized distributors?
All BZX384-A10X 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-A10X meets industry standards.
7.What is the process for return or replacement of BZX384-A10X?
All BZX384-A10X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A10X, 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-A10X part is unused and in its original packaging.
Return procedure for BZX384-A10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A10X Tags
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