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Nexperia USA Inc. BZX384-A11X
- Part No.:
- BZX384-A11X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A11X.pdf
- Description:
- DIODE ZENER 11V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,957
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Product details
Overview
BZX384-A11X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, providing precise 11 V breakdown at 5 mA with 150 Ω typical differential resistance and ≤100 μA reverse current at 8.8 V. It delivers stable reference voltage for low-power analog circuits, power supply feedback loops, and overvoltage protection in consumer and industrial PCBs.
For engineers reviewing the BZX384-A11X datasheet, BZX384-A11X pinout, BZX384-A11X application, or BZX384-A11X equivalent, this page provides verified Zener voltage, tolerance, thermal resistance, peak surge capability, and real-world use context - all confirmed from Nexperia's Rev. 4 product data sheet (Jan 2023).
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining regulation by conducting reverse current above its specified Zener voltage (10.89–11.11 V at IZ = 5 mA). Its low 300 mW total power dissipation and 415 K/W junction-to-ambient thermal resistance require careful PCB thermal design on FR4 with standard footprint.
The diode exhibits a positive temperature coefficient of +5.4 to +9.0 mV/K across operating current, enabling predictable drift compensation in precision references. Non-repetitive peak reverse power handling is rated at 40 W for 100 μs pulses, supporting transient suppression in low-energy surge scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.89 V to 11.11 V at IZ = 5 mA - defines tight ±1 % regulation window for stable reference generation |
| Differential Resistance (rdif) | 150 Ω max - determines output impedance and load regulation sensitivity in shunt configuration |
| Reverse Current (IR) | ≤100 μA at VR = 8.8 V - ensures minimal leakage below knee voltage in standby operation |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power limit on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports single-event transient clamping without failure |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in extended industrial ambient environments |
| Package | SOD323 (SC-76) - 2-pin surface-mount outline with cathode bar marking, footprint compatible with automated reflow |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; cathode marked by a bar on the top surface. Mounting requires tin-plated FR4 PCB with single-sided copper and standard solder land pattern per Figure 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 path for regulation current |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables high-accuracy voltage references without trimming in production-grade analog designs |
| 300 mW total power rating | Supports continuous regulation in space-constrained low-power applications (e.g., sensor signal conditioning) |
| 40 W non-repetitive surge capability | Provides robustness against ESD and line transients without external TVS in cost-sensitive systems |
| 110 K/W junction-to-solder-point thermal resistance | Allows effective heat transfer to PCB copper, improving long-term reliability under sustained load |
| E24 voltage series coverage (2.4 V–75 V) | Ensures design flexibility with standardized values across the full BZX384-A/B/C family |
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: Shunt reference connected to optocoupler input or error amplifier feedback node. Use Value: Tight ±1 % VZ ensures <±1.5 % output accuracy without secondary-side controller trimming. |
Use Scenario: Clamping microcontroller I/O lines against 12 V rail surges in automotive body electronics. IC Role / Device Role / Timing Role: Low-leakage Zener placed between signal line and ground to divert transient energy. Use Value: 100 μA max IR at 8.8 V prevents false triggering while 40 W surge rating absorbs ISO 7637-2 pulse 1a events. |
| Voltage Reference | Signal Level Translation |
Use Scenario: Providing stable bias for op-amp comparators in battery monitoring circuits. IC Role / Device Role / Timing Role: Two-terminal reference generating fixed threshold independent of supply variation. Use Value: 150 Ω rdif limits output impedance drift, ensuring comparator hysteresis remains stable across temperature. |
Use Scenario: Shifting logic levels between 3.3 V MCU and 5 V peripheral interface. IC Role / Device Role / Timing Role: Cathode tied to 5 V rail, anode driving 3.3 V node to clamp high-side swing. Use Value: 0.9 V forward voltage at 10 mA enables clean low-VF clamping without distorting fast digital edges. |
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-B11 | ±2 % tolerance (10.80–11.20 V), higher max IR (20 μA at 8.8 V) | Suitable where ±2 % regulation accuracy is acceptable and lower-cost sourcing is prioritized | Select when tighter tolerance is unnecessary and BOM cost reduction is critical |
| MMSZ4689 | ±5 % tolerance (10.4–11.6 V), same SOD-123 package, 500 mW Ptot | Higher power handling but looser tolerance; used in less precision-critical power rails | Choose for legacy designs using SOD-123 footprint or where 500 mW margin is required |
Compared with BZX384-A11X, BZX384-B11 trades ±1 % accuracy for broader availability and lower unit cost, while MMSZ4689 offers higher power headroom at the expense of voltage precision and thermal performance in SOD323 layout.
Availability
BZX384-A11X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and voltage reference applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for BZX384-A11X 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, headquartered in Nijmegen, Netherlands.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage regulation in compact, cost-sensitive consumer and industrial electronics where ±1 % to ±5 % tolerance and SOD323 mountability are essential.
FAQ
What is the guaranteed Zener voltage range for BZX384-A11X at 5 mA?
The guaranteed Zener voltage is 10.89 V minimum and 11.11 V maximum at test current IZ = 5 mA, reflecting its ±1 % tolerance specification per Nexperia's Rev. 4 datasheet. This range is validated across production lots and applies at Tj = 25 °C.
Can BZX384-A11X be used in place of a 12 V Zener diode?
No - BZX384-A11X is strictly a nominal 11 V device (10.89–11.11 V range); substituting it for a 12 V Zener would cause under-regulation. For 12 V, use BZX384-A12 (11.88–12.12 V), which is the next E24 value in the same ±1 % series.
What is the maximum continuous forward current rating?
The absolute maximum forward current is 250 mA per Table 5 (Limiting Values), but forward conduction is not its intended operating mode. In normal Zener regulation, forward bias is avoided; the 0.9 V forward voltage at 10 mA is provided only for characterization.
Does BZX384-A11X meet automotive qualification standards?
No - per Revision History (Section 13), BZX384-A11X is explicitly designated non-automotive qualified. Nexperia offers separate −Q automotive variants; this part is intended for industrial, consumer, and commercial applications only.
BZX384-A11X 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):
- 11 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A11X FAQ
1.How can I place an order for BZX384-A11X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A11X 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-A11X reliable?
The price and inventory of BZX384-A11X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A11X is usually 5 days.
3.What payment methods are accepted for BZX384-A11X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A11X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A11X?
BZX384-A11X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A11X 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-A11X?
For technical support, including BZX384-A11X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A11X requirements.
6.How does Aetrix verify that BZX384-A11X is sourced from the original manufacturer or authorized distributors?
All BZX384-A11X 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-A11X meets industry standards.
7.What is the process for return or replacement of BZX384-A11X?
All BZX384-A11X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A11X, 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-A11X part is unused and in its original packaging.
Return procedure for BZX384-A11X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A11X Tags
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