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Nexperia USA Inc. BZX84J-C3V9,115
- Part No.:
- BZX84J-C3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-C3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
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Product details
Overview
BZX84J-C3V9,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323F (SC-90) package, rated for 3.9 V nominal Zener voltage at 5 mA, 550 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides stable reference voltage in low-power biasing, overvoltage clamping, and voltage sensing circuits.
For engineers reviewing the BZX84J-C3V9,115 datasheet, BZX84J-C3V9,115 pinout, BZX84J-C3V9,115 application, or BZX84J-C3V9,115 equivalent, key selection criteria include Zener voltage tolerance, differential resistance, thermal resistance, surge capability, and automotive qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 3.9 V reference across load variations and temperature shifts. Its low 90 Ω typical differential resistance ensures minimal voltage deviation under dynamic current changes.
Designed for surface-mount applications with strict space constraints, it features a 230 K/W junction-to-ambient thermal resistance on FR4 PCB and supports non-repetitive 40 W peak reverse power surges (tp = 100 μs, square wave) for transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7 V to 4.1 V at IZ = 5 mA - defines regulation band for precision biasing |
| Differential Resistance (rdiff) | 90 Ω max - limits output voltage variation under ±1 mA current change |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 board |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W (tp = 100 μs, square wave) - enables short-duration ESD/surge clamping |
| Reverse Current (IR) | 3 μA max at VR = 1 V - ensures low leakage in high-impedance reference nodes |
| Junction Temperature (Tj) | 150 °C max - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability per stress test qualification |
Pinout & Package
Package: SOD323F (SC-90), ultra-small flat-lead surface-mount plastic package with 2 terminals, 1.35 mm × 0.80 mm footprint and 0.25 mm profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective voltage reference without trimming in non-critical analog circuits |
| Low 90 Ω differential resistance | Maintains < ±90 mV output shift for ±1 mA load current variation at 3.9 V |
| AEC-Q101 qualification | Validated for automotive electronics including body control modules and sensor interfaces |
| 550 mW power rating on FR4 | Supports continuous regulation in space-constrained consumer and industrial PCBs |
| SC-90 (SOD323F) package | Enables 0.65 mm pitch assembly and reflow-compatible footprint per JEDEC MS-012 |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.9 V reference for Hall-effect position sensors in engine control units. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, maintaining sensor excitation voltage within ±2 % across -40 °C to +125 °C ambient. Use Value: Enables accurate position reporting despite battery voltage fluctuations and thermal drift, meeting ASIL-B functional safety requirements. |
Use Scenario: Clamping transient voltages on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Shunt protection device conducting surge current above 3.9 V to ground before IC damage occurs. Use Value: Limits peak VBUS to ≤ 4.1 V for <100 μs, protecting USB PHY transceivers rated for 5.5 V absolute max. |
| Industrial PLC Input Conditioning | Low-Power MCU Reset Circuit |
|
Use Scenario: Level-shifting and noise filtering for 24 V digital inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Zener-based voltage divider sets threshold for optocoupler input stage, rejecting common-mode noise. Use Value: Achieves > 2 kV ESD immunity and 1500 Vrms isolation margin while consuming < 100 μA quiescent current. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Reference element in RC-reset circuit, triggering reset when supply drops below 3.7 V. Use Value: Guarantees deterministic reset assertion with ±0.2 V hysteresis, eliminating brown-out lockup in sub-10 μA sleep modes. |
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 | Same Zener voltage and tolerance, but not AEC-Q101 qualified; PZSM = 100 W only for ≤6.8 V types (same rating) | Limited to commercial/industrial use; unsuitable for automotive production | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification assurance |
| MMSZ4685-7-F | 3.9 V ±5 %, SOD-123 package (larger), 500 mW Ptot, no AEC-Q101 claim in datasheet | Higher thermal resistance (300 K/W), less suitable for dense automotive layouts | Choose if legacy SOD-123 footprint compatibility is mandatory and space is not constrained |
Compared with BZX84J-C3V9,115, the BZX84-C3V9,115 lacks automotive qualification but matches electrical specs, while MMSZ4685-7-F trades smaller size for higher thermal resistance and unverified automotive suitability - making the J-series optimal for new AEC-Q101-compliant designs requiring minimal footprint.
Availability
BZX84J-C3V9,115 is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port protection, and industrial PLC input conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BZX84J-C3V9,115 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 in harsh automotive and industrial environments where stability, surge resilience, and miniaturization are critical.
FAQ
What is the maximum continuous forward current for BZX84J-C3V9,115?
The absolute maximum forward current is 250 mA per limiting values table. However, forward conduction is not its intended operating mode; the device is designed for reverse-bias Zener regulation. Continuous forward operation above 100 mA risks exceeding junction temperature limits due to 1.1 V forward drop and limited thermal dissipation.
How does the ±5 % tolerance affect regulation accuracy in a 3.3 V MCU reset circuit?
With a nominal 3.9 V Zener voltage and ±5 % tolerance, the actual regulation range is 3.7 V to 4.1 V. When used in a resistor-divider reset circuit, this translates to a reset threshold uncertainty of approximately ±2.5 % around the target 3.3 V level - acceptable for non-safety-critical applications but insufficient for precise brown-out detection requiring tighter than ±1 %.
Can BZX84J-C3V9,115 replace BZX84-C3V9 in an existing design?
Yes, pin-to-pin and electrically compatible, but BZX84J-C3V9,115 adds AEC-Q101 qualification and identical 40 W surge rating. No layout or schematic changes are needed. The J-series offers enhanced reliability validation for automotive use, while maintaining the same SOD323F footprint and electrical parameters.
What is the thermal resistance from junction to solder point, and why does it matter?
Rth(j-sp) is 55 K/W, measured at the cathode solder point. This value directly impacts transient thermal response: during a 40 W, 100 μs surge, junction temperature rise is ~2200 K without conduction - but with 55 K/W path to copper, effective rise is reduced by >80 %, preventing thermal runaway and enabling reliable surge handling in compact layouts.
BZX84J-C3V9,115 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:
- ±5%
- 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-C3V9,115 FAQ
1.How can I place an order for BZX84J-C3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-C3V9,115 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-C3V9,115 reliable?
The price and inventory of BZX84J-C3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-C3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-C3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-C3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-C3V9,115?
BZX84J-C3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-C3V9,115 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-C3V9,115?
For technical support, including BZX84J-C3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-C3V9,115 requirements.
6.How does Aetrix verify that BZX84J-C3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-C3V9,115 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-C3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-C3V9,115?
All BZX84J-C3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-C3V9,115, 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-C3V9,115 part is unused and in its original packaging.
Return procedure for BZX84J-C3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-C3V9,115 Tags
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