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Nexperia USA Inc. BZX384-C43,115
- Part No.:
- BZX384-C43,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C43,115.pdf
- Description:
- DIODE ZENER 43V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,550
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Product details
Overview
BZX384-C43,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 43 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog supply rails and sensor interface circuits.
For engineers reviewing the BZX384-C43,115 datasheet, BZX384-C43,115 pinout, BZX384-C43,115 application, or BZX384-C43,115 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (415 K/W junction-to-ambient), differential resistance (375 Ω max), reverse current (150 μA max at 34 V), and SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable DC voltage across its terminals under varying load or input conditions. Its Zener voltage is specified at IZ = 2 mA, with temperature coefficient of +0.05 mV/K and typical differential resistance of ≤375 Ω, enabling predictable regulation in low-current feedback paths.
The SOD323 package supports surface-mount reflow and wave soldering per defined footprints, with cathode marked by a bar on the body. Thermal performance is characterized with Rth(j-a) = 415 K/W on FR4 PCB (single-sided copper, tin-plated), limiting continuous power to 300 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40.0 V to 46.0 V at IZ = 2 mA - defines clamping threshold for overvoltage protection or reference stability |
| Tolerance | ±5 % - sets worst-case voltage deviation in production batches without trimming |
| Differential Resistance (rdif) | ≤375 Ω - determines output impedance and load regulation error under current variation |
| Reverse Current (IR) | ≤150 μA at VR = 34 V - quantifies leakage before breakdown, critical for low-power standby circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - constrains maximum continuous current to ~7 mA at 43 V in standard PCB layout |
| Non-repetitive Peak Reverse Power | 40 W for tp ≤ 100 μs - enables transient surge suppression in ESD or inductive kick scenarios |
| Junction Temperature (Tj) | −65 °C to +150 °C - defines operational envelope for industrial and extended-temperature applications |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by a bar on the body. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H), lead pitch 1.15 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connected to regulated output node or ground return in shunt configuration |
| 2 | Anode (A) | Positive terminal; tied to unregulated input or higher-potential rail for reverse-bias operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint (1.8 × 1.35 mm) enables high-density placement in space-constrained consumer and IoT PCBs |
| Controlled Zener tolerance | ±5 % (C-series) balances cost and accuracy for non-critical voltage references and clamping functions |
| Thermal robustness | Rth(j-sp) = 110 K/W to cathode solder point ensures reliable heat transfer in thermally constrained layouts |
| Pulse survivability | Withstands 40 W non-repetitive surges (100 μs) - suitable for transient suppression in signal line protection |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA loop transmitters operating from 24 V DC rails. IC Role / Device Role / Timing Role: Shunt Zener regulator providing fixed 43 V reference to set current source compliance limit. Use Value: Maintains <±5 % output accuracy across −40 °C to +85 °C ambient, with <150 μA leakage preserving microamp-level sensor quiescent current. |
Use Scenario: Protecting downstream USB data lines (D+/D−) from accidental 12 V or 24 V misconnection during field service. IC Role / Device Role / Timing Role: Passive overvoltage clamp diverting fault current away from ESD diodes and PHY ICs. Use Value: Activates at 40–46 V to absorb 40 W transient energy within 100 μs, preventing latch-up or permanent damage to USB controller. |
| Low-Power Microcontroller Reset Circuit | Automotive Body Control Module Reference |
|
Use Scenario: Generating clean reset threshold for 3.3 V MCUs powered from switched 5 V supplies with ripple and dropout risk. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding RC network to supervisor IC input. Use Value: Delivers stable 43 V reference with ≤375 Ω dynamic impedance, ensuring reset assertion remains monotonic despite supply sag. |
Use Scenario: Providing calibrated reference for LIN bus transceiver voltage monitoring in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Secondary clamp regulating auxiliary 43 V rail derived from boost converter for diagnostic circuitry. Use Value: Operates reliably from −40 °C to +125 °C ambient with <0.05 mV/K tempco, meeting AEC-Q200 Class 1 thermal drift requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ43VCLT1G | Same 43 V nominal, ±5 % tolerance, SOD-123 package (larger footprint: 2.7 × 1.4 mm) | Higher thermal resistance (500 K/W) limits continuous power to ~240 mW on identical PCB | Select when legacy SOD-123 layout exists and board rework is impractical |
| Vishay BZX384-B43,115 | Same SOD323 package but ±2 % tolerance (tighter), lower rdif (≤250 Ω), higher cost | Better regulation accuracy suits precision ADC reference buffers where 43 V stability is critical | Select when ±2 % tolerance and <250 Ω impedance justify cost premium for metrology-grade designs |
Compared with MMBZ43VCLT1G, BZX384-C43,115 offers 17 % smaller footprint and 17 % lower thermal resistance; compared with BZX384-B43,115, it trades 3 % voltage tolerance and 33 % higher dynamic impedance for 22 % lower unit cost in high-volume production.
Availability
BZX384-C43,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, and MCU reset generation requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX384-C43,115 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 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 cost-sensitive, space-constrained voltage regulation and clamping in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous Zener current for BZX384-C43,115 at 70 °C ambient?
At Tamb = 70 °C, derating applies: Ptot = 300 mW × (1 − (70 − 25)/125) = 165 mW. With VZ ≈ 43 V, maximum continuous IZ = 165 mW / 43 V ≈ 3.8 mA. This assumes standard FR4 PCB mounting per datasheet condition.
Can BZX384-C43,115 be used in series to achieve higher regulation voltage?
No - Zener diodes in series exhibit cumulative tolerance and mismatched temperature coefficients, causing unpredictable total voltage. For >43 V regulation, use a single higher-voltage Zener (e.g., BZX384-C51) or active regulation instead.
Is the cathode marking visible under standard optical inspection?
Yes - the cathode is indicated by a distinct white or black bar on the top surface of the SOD323 package, aligned with pin 1 per JEDEC outline MO-203AA, and is clearly identifiable using 10× magnification during AOI or manual inspection.
Does this part meet RoHS and REACH compliance?
Yes - BZX384-C43,115 is RoHS-compliant (lead-free terminations, compliant with Directive 2011/65/EU) and REACH-conformant (SVHC-free per latest Nexperia declaration), with full material declarations available upon request.
BZX384-C43,115 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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 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-C43,115 FAQ
1.How can I place an order for BZX384-C43,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C43,115 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-C43,115 reliable?
The price and inventory of BZX384-C43,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C43,115 is usually 5 days.
3.What payment methods are accepted for BZX384-C43,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C43,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C43,115?
BZX384-C43,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C43,115 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-C43,115?
For technical support, including BZX384-C43,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C43,115 requirements.
6.How does Aetrix verify that BZX384-C43,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-C43,115 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-C43,115 meets industry standards.
7.What is the process for return or replacement of BZX384-C43,115?
All BZX384-C43,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C43,115, 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-C43,115 part is unused and in its original packaging.
Return procedure for BZX384-C43,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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