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Nexperia USA Inc. BZX84W-C68F
- Part No.:
- BZX84W-C68F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C68F.pdf
- Description:
- DIODE ZENER 68V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,719
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Product details
Overview
BZX84W-C68F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with a nominal 68 V breakdown voltage, 475 Ω typical differential resistance at 2 mA, and 71.7 mV/K temperature coefficient, housed in an SOT323 (SC-70) package for space-constrained power rail stabilization in industrial sensor interfaces and analog front-end biasing.
For engineers reviewing the BZX84W-C68F datasheet, BZX84W-C68F pinout, BZX84W-C68F application, or BZX84W-C68F equivalent, this page delivers verified Zener parameters, thermal derating guidance, SOT323 terminal mapping, and direct substitution options for precision voltage reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 68 V regulation across load and line variations, with a non-repetitive peak reverse power dissipation of 40 W for 100 µs pulses and junction temperature rated up to 150 °C.
Its 0.25 pF capacitance at 1 MHz and VR = 0 V enables use in high-frequency noise suppression, while the 455 K/W junction-to-ambient thermal resistance requires PCB copper area management for sustained 275 mW power dissipation at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 64.0 V to 72.0 V at IZ = 2 mA - defines regulation window for 68 V nominal rail |
| Differential Resistance (rdif) | 475 Ω max at IZ = 2 mA - determines output impedance and load regulation error |
| Temperature Coefficient (SZ) | 71.7 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Current (IR) | 50 nA max at VR = 0.7 × VZnom - specifies leakage below knee voltage |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - sets forward conduction loss in series protection configurations |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - limits continuous DC power handling without heatsinking |
| Junction Temperature (Tj) | −55 °C to +150 °C - defines operational envelope for industrial and extended-temperature designs |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads, 1.3 mm × 1.8 mm footprint, and 0.65 mm lead pitch; designed for reflow soldering using standard 2.65 mm × 2.35 mm land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential side in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated internal pad; no PCB trace or solder connection required |
| 3 | Cathode (K) | Reverse-bias terminal; tied to regulated output node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-optimized selection where tight regulation is not critical, e.g., overvoltage clamping |
| 275 mW power rating on FR4 | Supports standalone regulation in low-power analog circuits without external heat sinking |
| 0.25 pF diode capacitance | Minimizes signal distortion in RF-coupled bias networks and high-speed transient suppression |
| 150 °C maximum junction temperature | Permits operation in sealed enclosures or near heat-generating components without derating |
| SOT323 ultra-small outline | Reduces board area by >50 % vs. DO-35, enabling dense mixed-signal PCB layouts |
Applications
| Industrial Sensor Biasing | Power Rail Clamping |
|---|---|
|
Use Scenario: Providing stable 68 V reference for piezoelectric transducer bias in vibration monitoring systems. IC Role / Device Role / Timing Role: Zener diode functions as passive voltage reference, absorbing excess supply energy during transducer discharge events. Use Value: Maintains sensor linearity within ±0.5 % across −40 °C to +85 °C ambient via 71.7 mV/K coefficient compensation. |
Use Scenario: Protecting 60 V DC input stage of motor drive control logic against surge-induced overvoltage. IC Role / Device Role / Timing Role: Acts as shunt clamp, conducting when input exceeds 72 V to limit downstream IC stress. Use Value: Limits transient energy with 40 W non-repetitive peak power handling and 100 µs pulse response. |
| Programmable Logic Supply Stabilization | High-Frequency Signal Conditioning |
|
Use Scenario: Stabilizing auxiliary 68 V supply for FPGA configuration memory retention circuitry. IC Role / Device Role / Timing Role: Functions as low-noise voltage reference, reducing ripple-induced bit errors in SRAM cells. Use Value: Delivers <50 nA leakage at 47.6 V (0.7 × 68 V), minimizing standby current drain. |
Use Scenario: Filtering broadband noise on RF amplifier bias lines operating above 100 MHz. IC Role / Device Role / Timing Role: Provides low-capacitance (0.25 pF) AC path to ground while maintaining DC bias integrity. Use Value: Attenuates harmonics without loading sensitive RF nodes due to sub-0.3 pF junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B68 | ±2 % tolerance (66.6 V–69.4 V), 450 Ω rdif, 64.4 mV/K SZ | Tighter regulation needed for precision ADC reference buffers | Select when voltage stability over temperature is prioritized over cost |
| MMBZ5263B | 68 V nominal, ±5 %, 225 mW Ptot, SOT23 package, 500 Ω rdif | Higher thermal resistance (500 K/W) limits power handling on same PCB | Choose only if SOT23 footprint compatibility is mandatory and 275 mW rating is not required |
Compared with BZX84W-C68F, BZX84W-B68 offers tighter voltage control at higher cost and slightly lower temperature drift, while MMBZ5263B sacrifices 275 mW power capability and thermal performance for legacy SOT23 compatibility.
Availability
BZX84W-C68F is available at Aetrix Electronics and suitable for industrial sensor biasing, power rail clamping, and programmable logic supply stabilization requiring stable component supply under extended temperature and high-frequency conditions.
Supply support for BZX84W-C68F 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 and industrial-grade components.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, thermally efficient voltage regulation in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current the BZX84W-C68F can sustain at 25 °C ambient?
The device supports up to 200 mA forward current but is rated for reverse operation at IZ = 2 mA for specification compliance. At 275 mW total dissipation and 68 V Zener voltage, the practical continuous reverse current is limited to approximately 4 mA to avoid exceeding Ptot and maintain thermal stability on FR4 PCB.
How does the "n.c." pin (Pin 2) affect PCB layout and soldering?
Pin 2 is internally unconnected and must remain electrically isolated on the PCB. No copper trace, solder mask opening, or stencil aperture should be placed over it. The SOT323 footprint uses only Pins 1 and 3 for electrical connection; Pin 2 serves solely as mechanical alignment aid during placement.
Can BZX84W-C68F replace BZX84W-C62 in a 62 V regulation circuit?
No - BZX84W-C62 has a 58.0 V to 66.0 V Zener range, while BZX84W-C68F regulates between 64.0 V and 72.0 V. Substituting introduces a minimum 2 V upward shift in clamping threshold, risking overvoltage exposure to downstream 62 V-rated components unless circuit margins accommodate the change.
Is BZX84W-C68F qualified for automotive applications?
No - per Nexperia's revision history, the BZX84W series was explicitly changed to non-automotive qualification in Rev. 2 (January 2023). Automotive use requires the -Q qualified variant (e.g., BZX84W-C68F-Q), which undergoes AEC-Q101 stress testing and has distinct part numbering and packaging.
BZX84W-C68F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C68F FAQ
1.How can I place an order for BZX84W-C68F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C68F 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 BZX84W-C68F reliable?
The price and inventory of BZX84W-C68F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C68F is usually 5 days.
3.What payment methods are accepted for BZX84W-C68F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C68F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C68F?
BZX84W-C68F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C68F 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 BZX84W-C68F?
For technical support, including BZX84W-C68F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C68F requirements.
6.How does Aetrix verify that BZX84W-C68F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C68F 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 BZX84W-C68F meets industry standards.
7.What is the process for return or replacement of BZX84W-C68F?
All BZX84W-C68F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C68F, 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 BZX84W-C68F part is unused and in its original packaging.
Return procedure for BZX84W-C68F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C68F Tags
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