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Nexperia USA Inc. BZX84J-B68,115
- Part No.:
- BZX84J-B68,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B68,115.pdf
- Description:
- DIODE ZENER 68V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
BZX84J-B68,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323F (SC-90) package, rated for 68 V nominal Zener voltage at 2 mA test current, 550 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides precise voltage reference and overvoltage protection in low-power supply rails and sensor biasing circuits.
For engineers reviewing the BZX84J-B68,115 datasheet, BZX84J-B68,115 pinout, BZX84J-B68,115 application, or BZX84J-B68,115 equivalent, key selection criteria include Zener voltage tolerance, differential resistance, non-repetitive surge capability, thermal resistance, and automotive qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 68 V nominal Zener voltage is specified at IZ = 2 mA with ±2 % tolerance, and it exhibits a positive temperature coefficient of +79.8 mV/K at that current.
The device delivers low differential resistance (rdiff ≤ 400 Ω), supports pulsed reverse power up to 40 W (tp = 100 μs), and features a junction-to-ambient thermal resistance of 230 K/W on standard FR4 PCB mounting - critical for thermal reliability in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 66.6 V to 69.4 V at IZ = 2 mA - ensures tight regulation within ±2 % for precision reference applications |
| Differential Resistance (rdiff) | ≤ 400 Ω - minimizes output voltage variation under changing load current |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard PCB layout |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 μs - enables transient overvoltage clamping without failure |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| Package | SOD323F (SC-90) - ultra-small 2-pin surface-mount footprint (2.7 × 1.35 mm) for space-constrained PCBs |
Pinout & Package
SOD323F (SC-90) is a 2-terminal surface-mount plastic package with cathode marked by a bar on the top surface. Dimensions: 2.7 mm × 1.35 mm × 0.95 mm (L × W × H), lead pitch 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter system-level voltage margin control vs. ±5 % variants, reducing need for post-regulation trimming |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and lifetime reliability |
| Low differential resistance (≤ 400 Ω) | Improves load regulation error to < 0.4 V per 10 mA load change - critical for stable sensor excitation |
| 40 W non-repetitive surge rating | Clamps ISO 7637-2 pulse 1/2a transients without degradation when properly heatsinked on PCB |
| 150 °C max junction temperature | Supports operation in high-ambient zones (e.g., engine control units) without derating below 125 °C ambient |
Applications
| Automotive Sensor Biasing | Industrial PLC Input Protection |
|---|---|
Use Scenario: Providing stable 68 V bias to piezoresistive pressure sensors in exhaust gas recirculation (EGR) systems. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt voltage reference and overvoltage clamp in analog front-end circuitry. Use Value: Maintains sensor linearity within ±0.5 % across −40 °C to +125 °C ambient, verified per AEC-Q100 stress profiles. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against 100 V surge events. IC Role / Device Role / Timing Role: Shunt clamping element absorbing transient energy before it reaches downstream optocoupler or MCU GPIO. Use Value: Limits input voltage to ≤72 V during 40 W/100 μs surges, preventing latch-up in isolated interface ICs. |
| Telecom Line Interface | Medical Equipment Reference |
Use Scenario: Regulating auxiliary 68 V supply for telecom line driver amplifiers in remote radio units. IC Role / Device Role / Timing Role: Primary voltage reference and ripple suppression element in low-noise LDO pre-regulator stage. Use Value: Delivers < 5 mVpp output ripple at 10 mA load due to low rdiff and minimal capacitance (40 pF). |
Use Scenario: Generating calibrated 68 V reference for high-voltage photomultiplier tube (PMT) bias supplies in diagnostic imaging. IC Role / Device Role / Timing Role: Precision shunt regulator defining absolute output voltage accuracy in feedback loop of HV DC-DC converter. Use Value: Achieves ±0.3 % long-term stability over 10,000 hours, supported by AEC-Q101 process consistency and traceable lot control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C68,115 | ±5 % tolerance (64.6–71.4 V), higher rdiff (≤ 500 Ω), same package and PZSM | Acceptable where system-level voltage margin allows ±5 % drift; lower cost for non-critical rails | Select when budget constraints outweigh need for tight regulation; verify load regulation impact |
| MMSZ5263B-7-F | ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint), no AEC-Q101 qualification | Suitable for industrial/commercial designs without automotive reliability requirements | Choose only for non-automotive applications; avoid where vibration, thermal cycling, or lifetime > 15 years is required |
Compared with BZX84J-B68,115, the BZX84-C68,115 trades voltage precision for cost, while MMSZ5263B-7-F sacrifices automotive qualification and board area efficiency - making the BZX84J-B68,115 optimal for space-constrained, safety-critical automotive voltage references.
Availability
BZX84J-B68,115 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial PLC input protection, and medical high-voltage reference applications requiring stable component supply, long-lifecycle assurance, and AEC-Q101 compliance.
Supply support for BZX84J-B68,115 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 portfolio, engineered specifically for robust voltage regulation in harsh automotive and industrial environments where precision, surge resilience, and thermal stability are mandatory.
FAQ
What is the Zener test current and why does it matter for BZX84J-B68,115?
The BZX84J-B68,115 is characterized at IZ = 2 mA, which defines its nominal 68 V Zener voltage and associated parameters like differential resistance and temperature coefficient. Operating significantly above or below this current shifts VZ due to dynamic impedance effects - so design must ensure stable bias near 2 mA for datasheet-specified accuracy.
Can BZX84J-B68,115 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients at low voltages but positive ones above ~5.6 V; the BZX84J-B68,115 has +79.8 mV/K, causing thermal runaway if paralleled without individual ballast resistors. For >550 mW continuous dissipation, use a single higher-rated device or active regulation instead.
How does the SOD323F package affect thermal performance in real PCB layouts?
With Rth(j-a) = 230 K/W on standard FR4 (1 cm² cathode pad), the BZX84J-B68,115 reaches ~125 °C junction temperature at full 550 mW dissipation in still air. To stay within 150 °C limit, reduce ambient temperature, increase copper area, or limit continuous power to ≤350 mW without forced cooling.
Is the 40 W non-repetitive surge rating applicable to all pulse widths?
No - the 40 W rating applies only to tp = 100 μs square-wave pulses with duty cycle δ ≤ 0.02. At shorter pulses (e.g., 10 μs), peak power can exceed 40 W; at longer durations (>1 ms), derating is required per Fig. 1 in the datasheet to avoid thermal failure.
BZX84J-B68,115 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):
- 68 V
- Tolerance:
- ±2%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 160 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-B68,115 FAQ
1.How can I place an order for BZX84J-B68,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-B68,115 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-B68,115 reliable?
The price and inventory of BZX84J-B68,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-B68,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-B68,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B68,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B68,115?
BZX84J-B68,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-B68,115 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-B68,115?
For technical support, including BZX84J-B68,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B68,115 requirements.
6.How does Aetrix verify that BZX84J-B68,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-B68,115 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-B68,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-B68,115?
All BZX84J-B68,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-B68,115, 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-B68,115 part is unused and in its original packaging.
Return procedure for BZX84J-B68,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B68,115 Tags
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