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Nexperia USA Inc. BZX84J-B43,115
- Part No.:
- BZX84J-B43,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B43,115.pdf
- Description:
- DIODE ZENER 43V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:2,770
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Product details
Overview
BZX84J-B43,115 from Nexperia is a ±2 % tolerance Zener diode with nominal 43 V regulation voltage, 550 mW total power dissipation, and SOD323F (SC-90) surface-mount package, designed for precision voltage reference and overvoltage protection in automotive and industrial power rails.
For engineers reviewing the BZX84J-B43,115 datasheet, BZX84J-B43,115 pinout, BZX84J-B43,115 application, or BZX84J-B43,115 equivalent, this device supports stable 43 V clamping under transient surges up to 40 W (100 µs), operates across –55 °C to +150 °C ambient, and meets AEC-Q101 qualification for automotive electronics.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 43 V reference at 5 mA test current, with low differential resistance of 80 Ω ensuring minimal voltage deviation under load variation. Its temperature coefficient of +30.1 mV/K at IZ = 2 mA enables predictable drift compensation in thermal-stable designs.
The device features non-repetitive peak reverse power dissipation of 40 W (tp = 100 µs, square wave), junction-to-ambient thermal resistance of 230 K/W on FR4 PCB, and reverse leakage current ≤ 0.05 µA at VR = 40 V - confirming suitability for low-power standby regulation and ESD-tolerant clamp circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.1 V to 43.9 V at IZ = 2 mA - defines precise clamping threshold for 43 V rail protection |
| Tolerance | ±2 % - ensures tight voltage matching without post-production trimming |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - supports continuous regulation in compact SMT layouts |
| Non-repetitive Peak Power (PZSM) | 40 W (tp = 100 µs) - handles automotive load-dump transients per ISO 7637-2 |
| Differential Resistance (rdiff) | 80 Ω at IZ = 2 mA - limits output voltage shift to < 0.16 V per 2 mA load change |
| Junction Temperature (Tj) | 150 °C maximum - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, TC, and ESD testing |
Pinout & Package
SOD323F (SC-90) plastic surface-mount package: 2-terminal, ultra-compact footprint (2.3 mm × 1.35 mm × 0.95 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential reference; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 80 Ω at 2 mA - minimizes regulation error across operating current range |
| AEC-Q101 qualification | Validated for automotive applications including high-temp life testing and thermal cycling |
| Wide operating temperature | –55 °C to +150 °C ambient - supports engine control units and ADAS modules |
| Precision voltage tolerance | ±2 % - eliminates need for binning or external calibration in 43 V reference designs |
| Small SMD footprint | SOD323F package - enables high-density PCB layout in space-constrained modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 43 V sensor supply rail against load-dump transients in 36 V battery systems. IC Role / Device Role / Timing Role: Zener-based overvoltage protector placed directly at LDO input. Use Value: Absorbs 40 W surge energy (100 µs) without failure, maintaining downstream IC integrity per ISO 7637-2 Pulse 5a. |
Use Scenario: Protecting 4–20 mA loop receiver inputs from field-wiring induced surges. IC Role / Device Role / Timing Role: Primary shunt clamp limiting input voltage to 43 V before signal conditioning stage. Use Value: Limits leakage to ≤ 0.05 µA at 40 V, preserving measurement accuracy while surviving 1 kV EFT bursts. |
| Telecom Power Management Board | Medical Diagnostic Equipment Reference |
Use Scenario: Stabilizing auxiliary 43 V bias rail for RF front-end amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference providing stable bias point for GaN driver stages. Use Value: ±2 % tolerance and +30.1 mV/K tempco allow predictable drift compensation in closed-loop feedback paths. |
Use Scenario: Generating calibrated 43 V reference for high-resolution ADC reference dividers. IC Role / Device Role / Timing Role: Low-noise Zener source feeding precision resistor network. Use Value: 80 Ω rdiff ensures < 0.05 % line regulation error across 1–5 mA operating range, critical for ±16-bit accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43,115 | ±5 % tolerance, higher IR (≤ 0.05 µA vs. ≤ 0.05 µA same), identical package and PZSM | Acceptable where 40.9–45.1 V range suffices; not suitable for tight-tolerance analog references | Select when cost sensitivity outweighs voltage precision requirements |
| MMSZ43ET1G | ±5 % tolerance, SOD-123 package (larger), 500 mW Ptot, 30 W PZSM (tp = 100 µs) | Lower surge rating and larger footprint limit use in automotive miniaturized modules | Prefer only if legacy SOD-123 footprint compatibility is mandatory |
Compared with BZX84-C43,115 and MMSZ43ET1G, the BZX84J-B43,115 delivers tighter voltage control (±2 %), superior surge handling (40 W), and smaller SOD323F packaging - making it optimal for next-generation automotive and high-density industrial regulators requiring traceable AEC-Q101 compliance.
Availability
BZX84J-B43,115 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC protection, telecom power management, and medical diagnostic equipment requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZX84J-B43,115 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum reverse voltage this Zener can regulate continuously?
The BZX84J-B43,115 regulates continuously at its nominal Zener voltage of 43 V, with absolute maximum reverse voltage limited to 43.9 V (max VZ) at 2 mA test current. Continuous operation beyond this value risks thermal runaway due to exceeding the 550 mW total power dissipation limit on standard FR4 PCB.
Does this part support reflow soldering only, or can it be hand-soldered?
Reflow soldering is the only recommended method per Nexperia's documentation; hand-soldering is not advised due to thermal stress risks. The SOD323F package has strict thermal profile requirements (peak 260 °C, 30 s max), and localized iron contact may exceed junction temperature limits or damage the plastic body.
How does the ±2 % tolerance affect circuit accuracy in a 43 V reference design?
At ±2 %, the actual regulation voltage falls between 42.1 V and 43.9 V at 2 mA. For a 43 V reference, this introduces ±0.86 V absolute error - acceptable for overvoltage clamping but requires additional trimming or calibration if used in precision analog feedback loops demanding sub-0.1 % stability.
Is the cathode marking consistent across all BZX84J-Bxx variants?
Yes - all BZX84J-Bxx devices use identical SOD323F packaging with a single marking bar adjacent to pin 1 (cathode), confirmed in Nexperia's package outline (Fig. 11) and pinning table. No variant uses dot, notch, or alternate marking schemes within this series.
BZX84J-B43,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 80 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
BZX84J-B43,115 FAQ
1.How can I place an order for BZX84J-B43,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-B43,115 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 BZX84J-B43,115 reliable?
The price and inventory of BZX84J-B43,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-B43,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-B43,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B43,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B43,115?
BZX84J-B43,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-B43,115 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 BZX84J-B43,115?
For technical support, including BZX84J-B43,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B43,115 requirements.
6.How does Aetrix verify that BZX84J-B43,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-B43,115 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 BZX84J-B43,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-B43,115?
All BZX84J-B43,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-B43,115, 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 BZX84J-B43,115 part is unused and in its original packaging.
Return procedure for BZX84J-B43,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B43,115 Tags
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