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Nexperia USA Inc. BZX84J-B3V9,115
- Part No.:
- BZX84J-B3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
BZX84J-B3V9,115 from Nexperia is a 3.9 V ±2 % tolerance Zener diode in SOD323F (SC-90) package, rated for 550 mW total power dissipation and AEC-Q101 qualified for automotive use. It delivers stable voltage regulation with 3 Ω differential resistance at 5 mA, low 370 pF capacitance, and supports reverse surge up to 40 W (100 µs pulse). It serves as a precision reference or overvoltage clamp in low-power sensor biasing and microcontroller reset circuits.
For engineers reviewing the BZX84J-B3V9,115 datasheet, BZX84J-B3V9,115 pinout, BZX84J-B3V9,115 application, or BZX84J-B3V9,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (230 K/W), non-repetitive surge capability (40 W), cathode-anode polarity marking, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 3.9 V reference across load variations and temperature shifts. Its ±2 % tolerance and −3.5 to 0 mV/K temperature coefficient ensure tight regulation stability under 5 mA test current and ambient temperatures from −55 °C to +150 °C.
The device uses planar epitaxial construction for low leakage and repeatable breakdown characteristics. With 3 Ω differential resistance and 370 pF junction capacitance at 0 V, it supports fast transient response in low-noise analog references and ESD-robust I/O protection networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, ±2 % tolerance - ensures precise 3.82–3.98 V regulation at 5 mA test current |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB |
| Differential Resistance (rdiff) | 3 Ω at IZ = 5 mA - determines regulation stiffness against load current changes |
| Junction Capacitance (Cd) | 370 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering and signal integrity in bias networks |
| Non-repetitive Peak Power (PZSM) | 40 W for ≥7.5 V types - confirms surge robustness for transient clamping in automotive environments |
| Reverse Current (IR) | 3 µA max at VR = 3.7 V - defines leakage-induced error in high-impedance reference dividers |
| Thermal Resistance (Rth(j-a)) | 230 K/W - quantifies junction-to-ambient heat rise per watt on standard single-sided FR4 layout |
Pinout & Package
The BZX84J-B3V9,115 is housed in a SOD323F (SC-90) surface-mount plastic package measuring 2.7 × 1.35 × 0.95 mm, with flat leads optimized for reflow soldering. The cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connects to regulated output node or ground return path in shunt regulator configuration |
| 2 | Anode (A) | Positive terminal; ties to unregulated input rail or voltage source requiring stabilization |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor modules |
| Low differential resistance | 3 Ω enables <10 mV output shift per 30 mA load variation - critical for precision analog references |
| Small SOD323F footprint | 2.7 × 1.35 mm area saves board space in compact wearables and IoT edge nodes |
| Wide operating temperature | −55 °C to +150 °C junction range supports under-hood automotive and industrial motor drive environments |
| Tight voltage tolerance | ±2 % ensures consistent reset threshold across production batches without calibration |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 3.9 V reference to analog front-end of pressure or temperature sensors in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise bias point for sensor excitation and ADC reference scaling. Use Value: ±2 % tolerance and −3.5 to 0 mV/K TC minimize measurement drift across −40 °C to +125 °C ambient range. |
Use Scenario: Generating clean, glitch-free reset signal for ARM Cortex-M microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Zener-clamped RC network defining reset pulse width and voltage threshold. Use Value: 370 pF capacitance and 3 Ω rdiff ensure fast settling and immunity to supply ripple-induced false resets. |
| USB Port Overvoltage Protection | Industrial Signal Conditioning |
Use Scenario: Clamping transient surges on USB VBUS line to protect downstream USB PHY and power management ICs. IC Role / Device Role / Timing Role: Low-capacitance shunt protector absorbing 40 W non-repetitive pulses without failure. Use Value: AEC-Q101 qualification and 40 W surge rating meet ISO 7637-2 pulse 5a requirements for automotive USB ports. |
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter loop-powered sensors in factory automation. IC Role / Device Role / Timing Role: Precision Zener element in two-terminal current source feedback path. Use Value: 550 mW Ptot and 230 K/W Rth(j-a) allow continuous operation within 85 °C enclosure ambient limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9,115 | ±5 % tolerance (3.7–4.1 V), higher 5 µA max IR at 3.7 V | Acceptable where cost sensitivity outweighs precision; not AEC-Q101 qualified | Select for non-automotive consumer electronics with relaxed accuracy needs |
| MMSZ4684T1G | 3.9 V ±5 %, 500 mW Ptot, SOD-123 package (larger footprint) | Higher thermal resistance (300 K/W); lacks AEC-Q101 certification | Choose when legacy SOD-123 layout compatibility is required and automotive qualification is unnecessary |
Compared with BZX84J-B3V9,115, the BZX84-C3V9,115 trades tighter tolerance and automotive qualification for lower unit cost, while MMSZ4684T1G offers similar voltage but inferior thermal performance and no AEC-Q101 validation-making the original part uniquely suited for space-constrained, high-reliability automotive voltage references.
Availability
BZX84J-B3V9,115 is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset circuits, USB overvoltage protection, and industrial signal conditioning requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84J-B3V9,115 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 specializing in high-performance logic, analog, and discrete components, with leadership in automotive-qualified devices and energy-efficient solutions.
The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation in harsh automotive and industrial environments where reliability and parametric consistency are critical.
FAQ
What is the maximum continuous forward current for BZX84J-B3V9,115?
The absolute maximum forward current is 250 mA per limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 100 mA risks thermal overstress due to 1.1 V forward drop and 230 K/W thermal resistance, potentially degrading long-term Zener voltage stability.
Does BZX84J-B3V9,115 support reflow soldering only?
Yes - the datasheet explicitly states "Reflow soldering is the only recommended soldering method" for the SOD323F package. Wave or hand soldering is not qualified and may cause internal delamination or solder joint voiding due to thermal stress on the small leadframe and mold compound interface.
How does the −3.5 to 0 mV/K temperature coefficient affect circuit design?
This negative coefficient means output voltage decreases slightly as temperature rises. For a 3.9 V Zener, a 100 °C rise causes up to 350 mV drop - requiring compensation in high-accuracy references or acceptance of this drift in less sensitive applications like reset thresholds where monotonic behavior suffices.
Is the 40 W non-repetitive peak power rating applicable at all temperatures?
No - the 40 W rating applies only at Tj = 25 °C prior to surge, with tp = 100 µs square wave. Derating is required above 25 °C; Figure 1 shows PZSM drops to ~10 W at Tj = 150 °C, meaning effective surge handling diminishes significantly in hot environments unless thermal mass or active cooling is used.
BZX84J-B3V9,115 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):
- 3.9 V
- Tolerance:
- ±2%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 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-B3V9,115 FAQ
1.How can I place an order for BZX84J-B3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-B3V9,115 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-B3V9,115 reliable?
The price and inventory of BZX84J-B3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-B3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-B3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B3V9,115?
BZX84J-B3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-B3V9,115 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-B3V9,115?
For technical support, including BZX84J-B3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B3V9,115 requirements.
6.How does Aetrix verify that BZX84J-B3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-B3V9,115 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-B3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-B3V9,115?
All BZX84J-B3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-B3V9,115, 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-B3V9,115 part is unused and in its original packaging.
Return procedure for BZX84J-B3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B3V9,115 Tags
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