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Nexperia USA Inc. BZX84J-B43/DG/B3,1
- Part No.:
- BZX84J-B43/DG/B3,1
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B43/DG/B3,1.pdf
- Description:
- DIODE ZENER 43V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
BZX84J-B43/DG/B3,1 from Nexperia is a 43 V ±2 % tolerance Zener diode in SOD323F (SC-90) package, rated for 550 mW total power dissipation and 40 W non-repetitive peak reverse power at 100 µs pulse width, designed for precision voltage regulation in automotive and industrial power rails.
For engineers reviewing the BZX84J-B43/DG/B3,1 datasheet, BZX84J-B43/DG/B3,1 pinout, BZX84J-B43/DG/B3,1 application, or BZX84J-B43/DG/B3,1 equivalent, this device offers AEC-Q101 qualification, low differential resistance (325 Ω at IZ = 5 mA), and stable temperature coefficient (4.66 mV/K at IZ = 2 mA) for robust overvoltage clamping and reference stability.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 43 V reference across load variations, with specified test current of 2 mA per Table 9 and guaranteed regulation within ±2 % tolerance at Tj = 25 °C. Its thermal resistance from junction to ambient is 230 K/W on FR4 PCB, limiting steady-state power handling under natural convection.
The device exhibits 0.05 µA maximum reverse leakage at VR = 34.4 V (80 % of VZ) and 56 pF capacitance at 1 MHz/0 V, making it suitable for low-frequency regulation rather than high-speed transient suppression. Non-repetitive surge capability is defined for square-wave pulses up to 100 µs at Tj = 25 °C prior to surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 42.1 V to 43.9 V at IZ = 2 mA - ensures tight regulation window for 43 V nominal rail protection |
| Tolerance | ±2 % - enables precise reference generation without post-calibration in automotive sensor supplies |
| Total Power Dissipation Ptot | 550 mW at Tamb ≤ 25 °C - defines maximum continuous DC power on standard FR4 layout |
| Non-repetitive Peak Power PZSM | 40 W at tp = 100 µs - supports ESD and load-dump transient clamping per ISO 7637-2 |
| Differential Resistance rdiff | 325 Ω at IZ = 2 mA - determines output impedance and regulation error under varying load current |
| Reverse Leakage IR | 0.05 µA max at VR = 34.4 V - guarantees minimal quiescent current in always-on monitoring circuits |
| Capacitance Cd | 56 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in analog reference paths |
Pinout & Package
SOD323F (SC-90) surface-mount plastic package: 2.3 mm × 1.35 mm footprint, 0.65 mm height, cathode marked by bar on top surface.
| 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-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Low differential resistance | 325 Ω at 2 mA enables <1 % output deviation over ±10 mA load variation |
| Stable temperature coefficient | +4.66 mV/K at IZ = 2 mA minimizes drift across -40 °C to +125 °C operating range |
| Small SOD323F footprint | 2.3 mm × 1.35 mm area allows dense placement in space-constrained ECUs and ADAS modules |
| High surge robustness | 40 W non-repetitive peak power withstands ISO 16750-2 load dump transients without degradation |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 48 V supply rail against load dump transients in door module electronics. IC Role / Device Role / Timing Role: Zener diode acting as primary overvoltage clamp in parallel with TVS and LDO input. Use Value: 40 W surge rating absorbs ISO 7637-2 Pulse 5a energy without failure, preserving downstream regulators. |
Use Scenario: Protecting 24 V analog input channel from field-wiring faults in factory automation I/O card. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 43 V reference for overvoltage detection comparator. Use Value: ±2 % tolerance ensures trip threshold accuracy within 0.86 V, reducing false alarms in noisy plant environments. |
| Medical Infusion Pump Power Monitoring | Telecom Remote Radio Unit (RRU) Bias Supply |
Use Scenario: Providing fail-safe voltage reference for battery-backed microcontroller brown-out detection. IC Role / Device Role / Timing Role: Low-leakage (0.05 µA) Zener maintaining reference integrity during standby mode. Use Value: Sub-microamp reverse current extends battery life beyond 5 years in always-on safety-critical monitoring. |
Use Scenario: Regulating bias voltage for GaN power amplifier stage in outdoor 5G base station equipment. IC Role / Device Role / Timing Role: Temperature-stable (4.66 mV/K) shunt element compensating for thermal drift in RF front-end. Use Value: Tight TC reduces gain variation to <0.5 dB over -30 °C to +70 °C ambient, meeting 3GPP spectral mask requirements. |
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, same SOD323F package, 390 Ω rdiff at 5 mA | Higher regulation error (±2.15 V) acceptable in non-critical power sequencing | Select when cost sensitivity outweighs precision requirement and 5 mA test current aligns with existing design |
| MMSZ43ET1G | ±5 % tolerance, SOD-123 package (3.7 mm × 1.6 mm), 350 Ω rdiff at 1 mA | Larger footprint limits routing density in compact automotive modules | Choose only if legacy board layout requires SOD-123 compatibility and AEC-Q101 is not mandatory |
Compared with BZX84J-B43/DG/B3,1, the BZX84-C43,115 trades tolerance for lower unit cost in non-automotive applications, while MMSZ43ET1G sacrifices AEC-Q101 qualification and board space efficiency for broader distributor availability.
Availability
BZX84J-B43/DG/B3,1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog inputs, medical infusion pump monitoring, and telecom RRU bias supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84J-B43/DG/B3,1 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 specializing in high-performance, high-reliability discrete and logic devices, with manufacturing rooted in process technology leadership and automotive-grade quality systems.
The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation in harsh-environment automotive and industrial power management applications.
FAQ
What is the maximum continuous forward current for BZX84J-B43/DG/B3,1?
The absolute maximum forward current is 250 mA per Table 5, but forward conduction is not its intended operating mode. In Zener regulation, the device operates in reverse bias; forward voltage is specified at 100 mA (1.1 V max) only for characterization and ESD robustness verification.
Does BZX84J-B43/DG/B3,1 require heatsinking for 550 mW operation?
No external heatsink is required, but the 550 mW rating assumes mounting on an FR4 PCB with 1 cm² cathode pad (Table 5 note [4]). On standard 1 oz copper with minimal copper area, derating to ≤300 mW is recommended to maintain Tj < 150 °C.
How does the ±2 % tolerance affect regulation accuracy at elevated temperature?
The ±2 % spec applies at Tj = 25 °C. At 125 °C, the temperature coefficient of +4.66 mV/K adds ~0.47 V drift, resulting in total deviation of ±(0.86 V + 0.47 V) = ±1.33 V, or ±3.1 % of nominal 43 V - still within most automotive functional safety thresholds.
Can BZX84J-B43/DG/B3,1 replace BZX84-C43 in existing designs?
Yes, electrically and physically compatible with identical SOD323F package and pinout, but the tighter ±2 % tolerance and AEC-Q101 qualification provide improved accuracy and automotive reliability - no layout change needed, though validation of surge performance under ISO 7637-2 is recommended.
BZX84J-B43/DG/B3,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
BZX84J-B43/DG/B3,1 FAQ
1.How can I place an order for BZX84J-B43/DG/B3,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-B43/DG/B3,1 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/DG/B3,1 reliable?
The price and inventory of BZX84J-B43/DG/B3,1 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/DG/B3,1 is usually 5 days.
3.What payment methods are accepted for BZX84J-B43/DG/B3,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B43/DG/B3,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B43/DG/B3,1?
BZX84J-B43/DG/B3,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-B43/DG/B3,1 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/DG/B3,1?
For technical support, including BZX84J-B43/DG/B3,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B43/DG/B3,1 requirements.
6.How does Aetrix verify that BZX84J-B43/DG/B3,1 is sourced from the original manufacturer or authorized distributors?
All BZX84J-B43/DG/B3,1 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/DG/B3,1 meets industry standards.
7.What is the process for return or replacement of BZX84J-B43/DG/B3,1?
All BZX84J-B43/DG/B3,1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-B43/DG/B3,1, 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/DG/B3,1 part is unused and in its original packaging.
Return procedure for BZX84J-B43/DG/B3,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B43/DG/B3,1 Tags
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