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Nexperia USA Inc. BZX84W-C68X
- Part No.:
- BZX84W-C68X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C68X.pdf
- Description:
- DIODE ZENER 68V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,452
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Product details
Overview
BZX84W-C68X from Nexperia is a ±5 % tolerance Zener diode with 68 V nominal regulation voltage, 275 mW power dissipation, and SOT323 (SC-70) surface-mount package; it provides stable voltage reference in low-power supply rails and signal-level clamping circuits for industrial sensor interfaces and portable power management.
For engineers reviewing the BZX84W-C68X datasheet, BZX84W-C68X pinout, BZX84W-C68X application, or BZX84W-C68X equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse leakage, and thermal resistance data critical for precision biasing, overvoltage protection, and analog reference design.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 68 V reference across its cathode–anode terminals under regulated current conditions. Its ±5 % tolerance (C-series), 240 Ω typical differential resistance at IZ = 2 mA, and +71.7 mV/K temperature coefficient define its stability envelope in ambient temperatures from −55 °C to +150 °C.
Designed for high-frequency applications, it exhibits 0.25 pF junction capacitance at 1 MHz and 0 V reverse bias, enabling fast transient response in ESD clamp networks and RF bias circuits. The SOT323 package supports reflow soldering with defined footprint dimensions and thermal resistance of 455 K/W (junction-to-ambient, FR4 PCB).
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 precision reference use |
| 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 Leakage IR | 50 nA max at VR = 47.6 V (0.7 × VZnom) - sets minimum bias current for reliable conduction |
| Total Power Dissipation Ptot | 275 mW at Tamb = 25 °C on FR4 PCB - limits continuous DC power handling in standard layout |
| Junction-to-Ambient Rth(j-a) | 455 K/W - governs thermal rise under load; requires derating above 25 °C ambient |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines anode–cathode drop during forward conduction |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint, 0.65 mm pitch, and 0.1 mm maximum A1 height for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener operation |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected in PCB layout |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node for Zener regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical regulation where tight tolerance is not required |
| 275 mW power rating on FR4 PCB | Supports stable operation in space-constrained consumer and industrial PCBs without heatsinking |
| 0.25 pF junction capacitance | Minimizes signal distortion in RF bias and high-speed clamping applications up to ~1 GHz |
| −55 °C to +150 °C operating range | Validates use in extended-temperature environments including automotive under-hood auxiliary circuits |
| SC-70 package compatibility | Ensures drop-in replacement capability with industry-standard pick-and-place equipment and reflow profiles |
Applications
| Industrial Sensor Signal Conditioning | Portable Device Power Rail Clamp |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter front-end op-amps in factory automation systems. IC Role / Device Role / Timing Role: Zener diode providing fixed 68 V reverse-bias reference to set op-amp common-mode input range. Use Value: Maintains <±1.5 % reference accuracy over −40 °C to +85 °C ambient due to known +71.7 mV/K TC and low leakage. |
Use Scenario: Clamping surge transients on 48 V DC input rail of handheld test equipment powered by Li-ion battery packs. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing short-duration overvoltage spikes before LDO input stage. Use Value: Limits peak rail voltage to ≤72 V with 40 W non-repetitive surge capability (100 µs pulse), preventing downstream IC damage. |
| Low-Power Analog Reference Source | High-Frequency Bias Network |
|
Use Scenario: Generating stable bias point for JFET amplifier stages in audio preamplifier modules. IC Role / Device Role / Timing Role: Zener diode establishing fixed gate-source voltage in discrete amplifier topology. Use Value: Delivers <100 ppm/°C effective stability via 475 Ω rdif and low thermal resistance, reducing gain drift. |
Use Scenario: Providing DC bias to GaAs FET gate in 2.4 GHz ISM-band RF front-end matching network. IC Role / Device Role / Timing Role: Low-capacitance Zener maintaining constant gate voltage while minimizing RF loading. Use Value: 0.25 pF capacitance ensures <0.02 dB insertion loss at 2.4 GHz, preserving PAE and noise figure. |
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 (tighter), same 68 V nominal, 150 Ω rdif max | Higher precision reference needed in feedback loops of switching regulators | Select when voltage stability <±1.5 % is mandatory and cost premium is acceptable |
| MMBZ5263B | 68 V nominal, ±5 %, 225 mW Ptot, SOT23 package, 500 Ω rdif | Larger footprint and higher thermal resistance limit use in dense layouts | Choose only if SOT23 board compatibility is required and 275 mW derating is acceptable |
Compared with BZX84W-C68X, BZX84W-B68 offers tighter regulation but higher cost, while MMBZ5263B trades package compatibility for reduced power handling and degraded thermal performance-making BZX84W-C68X optimal for space-constrained, medium-precision Zener applications.
Availability
BZX84W-C68X is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable power clamping, low-power analog references, and high-frequency bias networks requiring stable component supply with full traceability and lifecycle support.
Supply support for BZX84W-C68X 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and clamping in commercial and industrial applications-not qualified for automotive safety-critical use.
FAQ
What is the maximum reverse current specification for BZX84W-C68X at its rated Zener voltage?
The maximum reverse leakage current IR is 50 nA at VR = 47.6 V (0.7 × 68 V), measured at Tj = 25 °C. This value ensures minimal standby power draw in bias networks and validates stable turn-on behavior below the nominal Zener voltage threshold.
Can BZX84W-C68X be used in automotive applications?
No-BZX84W-C68X is explicitly non-automotive qualified per Nexperia's revision history. It lacks AEC-Q200 stress testing and qualification for automotive temperature, vibration, and lifetime requirements. Automotive alternatives require explicit -Q suffix parts such as BZX84W-C68-Q.
What is the recommended PCB footprint for reflow soldering of BZX84W-C68X?
The official reflow footprint specifies 0.55 mm × 0.55 mm solder pads (3×), 1.325 mm center-to-center spacing, and 2.35 mm × 2.65 mm overall occupied area. This matches JEDEC MO-203-5 and ensures coplanarity, void control, and thermal reliability during lead-free reflow.
How does the temperature coefficient affect regulation accuracy over temperature range?
With SZ = +71.7 mV/K, BZX84W-C68X exhibits +1.06 % voltage shift per 10 °C rise from 25 °C. Over −40 °C to +125 °C, total drift is approximately ±7.7 V, requiring system-level compensation or derating if absolute regulation stability beyond ±5 % is required.
BZX84W-C68X 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-C68X FAQ
1.How can I place an order for BZX84W-C68X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C68X 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-C68X reliable?
The price and inventory of BZX84W-C68X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C68X is usually 5 days.
3.What payment methods are accepted for BZX84W-C68X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C68X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C68X?
BZX84W-C68X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C68X 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-C68X?
For technical support, including BZX84W-C68X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C68X requirements.
6.How does Aetrix verify that BZX84W-C68X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C68X 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-C68X meets industry standards.
7.What is the process for return or replacement of BZX84W-C68X?
All BZX84W-C68X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C68X, 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-C68X part is unused and in its original packaging.
Return procedure for BZX84W-C68X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C68X Tags
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onsemi
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MMSZ5245BS-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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