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Nexperia USA Inc. BZX384-C12,115
- Part No.:
- BZX384-C12,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C12,115.pdf
- Description:
- DIODE ZENER 12V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,666
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Product details
Overview
BZX384-C12,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 12 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 linear regulators, overvoltage protection circuits, and biasing networks for analog signal conditioning.
For engineers reviewing the BZX384-C12,115 datasheet, BZX384-C12,115 pinout, BZX384-C12,115 application, or BZX384-C12,115 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (≤150 Ω at IZ = 5 mA), reverse current (≤0.1 μA at VR = 9.4 V), thermal resistance (415 K/W junction-to-ambient), and non-repetitive peak reverse power (40 W).
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse breakdown characteristics, designed for precision voltage regulation in low-current (<250 mA forward, <2.5 A surge) applications. Its E24-standardized 12 V nominal Zener voltage is specified at 5 mA test current with a temperature coefficient of +6.0 mV/K and differential resistance ≤150 Ω.
The SOD323 package enables high-density PCB layout while maintaining thermal performance via 110 K/W junction-to-solder-point resistance. The cathode-marked anode-cathode configuration supports unidirectional clamping and shunt regulation without external biasing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V to 12.7 V at IZ = 5 mA - defines regulated output range under standard test conditions |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on FR4 PCB |
| Differential Resistance (rdif) | ≤150 Ω at IZ = 5 mA - determines regulation stiffness and output impedance in shunt mode |
| Reverse Current (IR) | ≤0.1 μA at VR = 9.4 V - ensures minimal leakage below knee voltage in standby operation |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient overvoltage suppression without failure |
| Junction Temperature (Tj) | −65 °C to +150 °C - specifies operational and storage thermal limits for industrial environments |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 1.35 mm × 0.85 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse breakdown current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt path for excess current |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not required |
| 300 mW total power rating | Supports continuous regulation in low-power sensor interfaces and microcontroller I/O protection |
| 40 W non-repetitive peak power | Provides robust transient immunity against ESD and inductive switching spikes |
| 150 °C maximum junction temperature | Ensures reliable operation in enclosed industrial enclosures without forced cooling |
| SOD323 package footprint | Allows placement in space-constrained designs with standard reflow soldering compatibility |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 12 V reference for op-amp comparators in AC-DC adapter feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise trip threshold independent of load current. Use Value: Maintains ±5 % regulation accuracy across −40 °C to +85 °C ambient with <0.1 μA leakage below 9.4 V. |
Use Scenario: Clamping 12 V rail against surges from relay coil flyback in PLC I/O modules. IC Role / Device Role / Timing Role: Passive overvoltage protector diverting transient energy to ground before IC damage occurs. Use Value: Absorbs 40 W for 100 μs without degradation, limiting rail excursion to ≤12.7 V during surge events. |
| Microcontroller I/O Protection | Signal Level Translation |
|
Use Scenario: Protecting 3.3 V GPIO pins from accidental 12 V misconnection in field-serviceable equipment. IC Role / Device Role / Timing Role: Bidirectional clamp limiting pin voltage to safe range using forward and reverse conduction. Use Value: Conducts <0.9 V forward drop at 10 mA and breaks down at 11.4–12.7 V, preventing latch-up or oxide rupture. |
Use Scenario: Shifting logic levels between 12 V automotive sensors and 5 V microcontroller inputs. IC Role / Device Role / Timing Role: Passive level translator using Zener knee voltage to define high-state threshold. Use Value: Delivers predictable 12 V reference point with ≤150 Ω dynamic impedance, minimizing signal distortion in slow analog sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C12 | Same 12 V nominal, ±5 % tolerance, SOD-123 package; higher rdif (≤200 Ω) and lower PZSM (25 W) | Less effective for high-energy transients; suitable only for low-surge environments | Select when board space allows larger SOD-123 footprint and surge risk is minimal |
| Vishay BZX384-B12 | Same package and VZ, but tighter ±2 % tolerance and lower rdif (≤80 Ω); identical Ptot/PZSM | Higher precision regulation at cost of increased unit price and reduced voltage margin | Choose when circuit requires tighter voltage stability and can tolerate narrower tolerance band |
Compared with BZX384-C12,115, the BZT52-C12 offers lower surge resilience due to reduced peak power rating, while the BZX384-B12 improves regulation accuracy at the expense of design margin for voltage drift and temperature variation.
Availability
BZX384-C12,115 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and microcontroller I/O protection requiring stable component supply across industrial, instrumentation, and consumer electronics programs.
Supply support for BZX384-C12,115 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 manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume production of discrete, logic, and MOSFET devices with emphasis on reliability and efficiency.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and protection functions in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current this diode can handle at 12 V?
The BZX384-C12,115 is not rated for continuous reverse conduction at its Zener voltage. At VR = 12 V, it operates in breakdown with IZ = 5 mA nominal; sustained current must be limited by external series resistance to maintain Ptot ≤ 300 mW. Exceeding this causes thermal runaway.
Can this diode replace a 1N4742A in existing designs?
No-1N4742A is a 12 V, 1 W through-hole Zener with TO-204AA package and ±5 % tolerance, whereas BZX384-C12,115 is SOD323-packaged with 300 mW rating. Direct replacement requires verifying power derating, PCB layout, and thermal management for the lower-power SMD variant.
How does temperature affect its Zener voltage stability?
At IZ = 5 mA, the BZX384-C12,115 exhibits a +6.0 mV/K temperature coefficient, meaning VZ increases ~0.6 V over a 100 °C rise. This positive drift is typical for 12 V Zeners and must be accounted for in high-precision references or wide-temperature applications.
Is this part qualified for automotive use?
No-BZX384-C12,115 is not automotive-qualified. Nexperia explicitly states in the datasheet that non-Q parts lack AEC-Q200 qualification and are unsuitable for safety-critical vehicle systems. Automotive alternatives require explicit "-Q" suffix and separate qualification documentation.
BZX384-C12,115 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C12,115 FAQ
1.How can I place an order for BZX384-C12,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C12,115 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-C12,115 reliable?
The price and inventory of BZX384-C12,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C12,115 is usually 5 days.
3.What payment methods are accepted for BZX384-C12,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C12,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C12,115?
BZX384-C12,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C12,115 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-C12,115?
For technical support, including BZX384-C12,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C12,115 requirements.
6.How does Aetrix verify that BZX384-C12,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-C12,115 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-C12,115 meets industry standards.
7.What is the process for return or replacement of BZX384-C12,115?
All BZX384-C12,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C12,115, 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-C12,115 part is unused and in its original packaging.
Return procedure for BZX384-C12,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C12,115 Tags
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