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Nexperia USA Inc. BZX84J-C39,115
- Part No.:
- BZX84J-C39,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-C39,115.pdf
- Description:
- DIODE ZENER 39V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:550
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Product details
Overview
BZX84J-C39,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 39 V breakdown voltage, 550 mW total power dissipation, and SOD323F (SC-90) surface-mount package. It delivers stable reference voltage in low-power supply rails and overvoltage protection circuits for automotive body electronics and industrial sensor interfaces.
For engineers reviewing the BZX84J-C39,115 datasheet, BZX84J-C39,115 pinout, BZX84J-C39,115 application, or BZX84J-C39,115 equivalent, key selection criteria include Zener voltage tolerance, non-repetitive surge capability (700 mA peak reverse current), differential resistance (≤ 75 Ω at IZ = 2 mA), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 39 V reference across its terminals under regulated current conditions. Its temperature coefficient of +33.4 mV/K at IZ = 2 mA ensures predictable voltage drift over temperature, while low differential resistance (75 Ω typ.) supports tight regulation in feedback loops.
Designed for transient suppression and precision biasing, it withstands non-repetitive 40 W reverse surges (100 µs square wave, Tj = 25 °C) and exhibits ≤ 0.05 µA reverse leakage at 31.2 V (80 % of VZ). The SC-90 package enables high-density PCB layouts with thermal resistance of 230 K/W (junction-to-ambient, FR4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.0 V to 41.0 V at IZ = 2 mA - defines operating regulation point with ±5 % tolerance |
| Differential Resistance (rdiff) | 75 Ω max at IZ = 2 mA - determines regulation stiffness and output impedance in shunt configuration |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 31.2 V - ensures minimal standby power loss in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Current (IZSM) | 700 mA at tp = 100 µs - enables transient overvoltage clamping without device failure |
| Temperature Coefficient (SZ) | +33.4 mV/K at IZ = 2 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - defines conduction loss when used in forward-biased ESD paths |
Pinout & Package
The BZX84J-C39,115 is housed in a SOD323F (SC-90) plastic surface-mount package measuring 2.7 mm × 1.6 mm × 0.95 mm, with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-bias voltage applied here to initiate Zener conduction |
| 2 (A) | Anode | Typically tied to ground or lower-potential rail; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including body control modules and lighting systems |
| ±5 % Zener voltage tolerance | Enables precise voltage reference generation without post-production trimming |
| Low differential resistance (75 Ω) | Minimizes output voltage variation under load current changes in shunt regulator designs |
| Non-repetitive 40 W surge rating | Supports IEC 61000-4-5 level 3 surge immunity in industrial input protection stages |
| SOD323F ultra-small footprint | Reduces PCB area by >40 % vs. SOD123, enabling compact power management in space-constrained modules |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller reset circuitry. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable 39 V rail for analog front-end protection and level-shifting. Use Value: Maintains reset threshold accuracy within ±2 % over -40 °C to +125 °C ambient, meeting ISO 16750-2 requirements. |
Use Scenario: Overvoltage clamp on 24 V industrial analog input channels (e.g., 4–20 mA receivers). IC Role / Device Role / Timing Role: Transient voltage suppressor limiting fault energy before downstream op-amps or ADCs. Use Value: Clamps 1 kV/500 A surge to <45 V peak with <100 ns response, preventing damage to precision signal chain components. |
| Consumer Power Adapter Feedback | Medical Equipment Auxiliary Supply |
Use Scenario: Secondary-side voltage reference in flyback converter feedback loop for USB-C PD adapters. IC Role / Device Role / Timing Role: Precision Zener setting optocoupler LED current to regulate isolated output voltage. Use Value: Delivers <0.5 % output voltage drift over line/load/temperature, supporting ±5 % output tolerance compliance. |
Use Scenario: Isolated auxiliary 39 V rail generation for LED backlight drivers in diagnostic imaging displays. IC Role / Device Role / Timing Role: Low-noise voltage reference stabilizing constant-current source for medical-grade illumination. Use Value: Achieves <10 µVpp noise floor and <5 ppm/°C TC, satisfying IEC 60601-1 creepage and stability 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-C39,115 | Same Zener voltage and package but ±5 % tolerance only; lacks AEC-Q101 qualification | Restricted to commercial-grade consumer power supplies, not automotive or industrial environments | Select when cost sensitivity outweighs automotive qualification requirements |
| MMSZ5257ET1G | 39 V nominal, ±5 %, SOD-123 package; higher Ptot = 500 mW; rdiff = 90 Ω max | Compatible in board-level replacement but requires larger PCB footprint and has higher regulation impedance | Choose for legacy designs using SOD-123 footprints or where thermal derating above 70 °C is critical |
Compared with BZX84J-C39,115, the BZX84-C39,115 omits automotive qualification and offers no surge performance guarantee, while MMSZ5257ET1G trades smaller size for reduced regulation precision and larger board area-making the J-series optimal for new AEC-Q101-compliant designs needing compact, robust clamping.
Availability
BZX84J-C39,115 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback, and medical auxiliary supply designs requiring stable component supply with guaranteed long-term availability.
Supply support for BZX84J-C39,115 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, with leadership in automotive-qualified components and advanced packaging.
The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum continuous reverse current this diode can sustain at 39 V?
The BZX84J-C39,115 is rated for 550 mW total power dissipation at 25 °C ambient. At 39 V, this corresponds to a maximum continuous reverse current of approximately 14.1 mA (550 mW ÷ 39 V). Derating applies above 25 °C per the 230 K/W junction-to-ambient thermal resistance.
Does the marking 'U8' on the device body confirm it is the BZX84J-C39 variant?
Yes. Per Table 4 of the datasheet, the marking code 'U8' uniquely identifies the BZX84J-C39 type within the BZX84J series. This two-character code is laser-marked on the cathode side of the SOD323F package and is verified during incoming inspection at Aetrix Electronics.
Can this Zener diode be used in parallel for higher power handling?
No. Parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages and thermal runaway risk. Each BZX84J-C39,115 must operate independently within its 550 mW limit. For higher power, use a single higher-rated device or active regulation instead.
Is the 40 W non-repetitive surge rating applicable at elevated junction temperatures?
No. The 40 W non-repetitive peak reverse power dissipation (PZSM) is specified only at Tj = 25 °C prior to surge. At higher initial junction temperatures, the allowable surge energy decreases significantly-refer to Figure 1 in the datasheet for pulse duration derating curves up to 150 °C.
BZX84J-C39,115 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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 75 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39,115 FAQ
1.How can I place an order for BZX84J-C39,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-C39,115 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-C39,115 reliable?
The price and inventory of BZX84J-C39,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-C39,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-C39,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-C39,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-C39,115?
BZX84J-C39,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-C39,115 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-C39,115?
For technical support, including BZX84J-C39,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-C39,115 requirements.
6.How does Aetrix verify that BZX84J-C39,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-C39,115 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-C39,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-C39,115?
All BZX84J-C39,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-C39,115, 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-C39,115 part is unused and in its original packaging.
Return procedure for BZX84J-C39,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-C39,115 Tags
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