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Nexperia USA Inc. BZX384-B12,115
- Part No.:
- BZX384-B12,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B12,115.pdf
- Description:
- DIODE ZENER 12V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:70,703
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Product details
Overview
BZX384-B12,115 from Nexperia is a ±2 % 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 and overvoltage protection circuits for consumer and industrial power management.
For engineers reviewing the BZX384-B12,115 datasheet, BZX384-B12,115 pinout, BZX384-B12,115 application, or BZX384-B12,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts with documented tolerance and temperature coefficient differences.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 12 V reference across load variations, with differential resistance of ≤150 Ω at IZ = 5 mA and temperature coefficient of +0.1 mV/K. Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it exhibits Rth(j-a) = 415 K/W in free air and Rth(j-sp) = 110 K/W to solder point, supporting reliable thermal performance in compact power rails and signal conditioning nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 11.80 V to 12.20 V at IZ = 5 mA - ensures precise 12 V regulation within ±2 % tolerance band under standard test conditions |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines 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) | ≤0.1 μA at VR = 9 V - guarantees minimal leakage before breakdown onset |
| Temperature Coefficient (SZ) | +0.1 mV/K at IZ = 5 mA - indicates slight positive drift with temperature, critical for precision references |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - defines conduction threshold when used in forward-biased clamp configurations |
| Junction Temperature (Tj) | −65 °C to +150 °C - sets operational and storage limits for harsh ambient environments |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads: compact 1.35 mm × 0.85 mm footprint, 0.45 mm lead pitch, and cathode-marked top-side bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C), reducing calibration overhead in feedback loops |
| 300 mW power rating | Supports sustained operation in low-current bias networks without derating below 25 °C ambient |
| 40 W non-repetitive surge capability | Withstands transient overvoltage events up to 100 μs duration without degradation |
| 110 K/W junction-to-solder-point thermal resistance | Facilitates effective heat transfer to PCB copper, improving long-term reliability in thermally constrained layouts |
| 150 °C max junction temperature | Permits operation in high-temperature industrial enclosures without thermal shutdown |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 12 V reference for TL431-based adjustable linear regulators in wall adapters. IC Role / Device Role / Timing Role: Zener diode establishes fixed voltage node for error amplifier feedback path. Use Value: ±2 % tolerance ensures output accuracy within ±1.2 % over line/load, eliminating need for post-production trimming. |
Use Scenario: Protecting microcontroller GPIO pins against ESD-induced voltage spikes exceeding 12 V. IC Role / Device Role / Timing Role: Reverse-biased clamping element shunting excess energy to ground. Use Value: 40 W non-repetitive surge rating absorbs 100 μs transients without parametric shift or failure. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Generating 12 V bias for op-amp input stages in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Passive voltage source defining common-mode operating point. Use Value: Low 150 Ω differential resistance minimizes voltage droop under 100 μA load variation. |
Use Scenario: Setting constant current through LED strings in indicator panels using resistor-Zener bias network. IC Role / Device Role / Timing Role: Voltage reference determining base-emitter drop in transistor current mirror. Use Value: +0.1 mV/K temperature coefficient yields <0.12 % drift over −40 °C to +85 °C ambient range. |
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-A12,115 | ±1 % tolerance, 115 Ω rdif, −0.1 mV/K SZ | Higher precision reference needed for metrology-grade analog front-ends | Select when tighter initial accuracy and negative tempco outweigh cost premium |
| BZX384-C12,115 | ±5 % tolerance, 200 Ω rdif, +0.05 mV/K SZ | Cost-sensitive consumer power rails where ±5 % regulation suffices | Choose for high-volume remote controls or battery chargers with relaxed spec margins |
Compared with BZX384-B12,115, the A-version offers superior initial accuracy and lower dynamic impedance but higher unit cost, while the C-version trades tolerance and impedance for lower procurement cost-making the B-series optimal for balanced performance in industrial control and embedded power supplies.
Availability
BZX384-B12,115 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and signal level shifting requiring stable component supply across automotive infotainment power domains, industrial PLC I/O modules, and medical diagnostic equipment power rails.
Supply support for BZX384-B12,115 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 expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage regulation in space-constrained, low-power applications including portable electronics and IoT edge nodes.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-B12,115 has a maximum continuous forward current of 250 mA, but its reverse operation is defined by Zener current: it is rated for 5 mA nominal test current and supports up to 20 mA continuous Zener current with appropriate thermal design. Exceeding 20 mA requires verification of junction temperature rise using Rth(j-a) = 415 K/W.
Can this Zener diode be used in parallel for higher power dissipation?
No-Zener diodes exhibit manufacturing spread in VZ, causing current imbalance when paralleled. Even BZX384-B12,115 units from the same reel show ±2 % tolerance, leading to one device conducting >90 % of total current. Use a single higher-power Zener or active regulation instead.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With +0.1 mV/K SZ, the BZX384-B12,115 shifts +12.5 mV over 125 K span-approximately +0.104 % of 12 V. Combined with ±2 % initial tolerance, total worst-case deviation is ±2.104 %, making it suitable for non-critical references but not precision instrumentation.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes-the SOD323 package is qualified for JEDEC J-STD-020D reflow profiles. Nexperia specifies peak temperature ≤260 °C for 30 seconds max, with ramp rates ≤3 °C/s pre-peak. The 0.45 mm lead pitch and 1.35 mm × 0.85 mm body meet IPC-7351B density Level A requirements.
BZX384-B12,115 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:
- ±2%
- 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-B12,115 FAQ
1.How can I place an order for BZX384-B12,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B12,115 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-B12,115 reliable?
The price and inventory of BZX384-B12,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B12,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B12,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B12,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B12,115?
BZX384-B12,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B12,115 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-B12,115?
For technical support, including BZX384-B12,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B12,115 requirements.
6.How does Aetrix verify that BZX384-B12,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B12,115 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-B12,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B12,115?
All BZX384-B12,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B12,115, 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-B12,115 part is unused and in its original packaging.
Return procedure for BZX384-B12,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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