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Nexperia USA Inc. BZX84W-B6V8F
- Part No.:
- BZX84W-B6V8F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B6V8F.pdf
- Description:
- DIODE ZENER 6.8V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:1,612
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Product details
Overview
BZX84W-B6V8F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 6.8 V nominal breakdown voltage at 5 mA, 80 Ω differential resistance, and 3.0 mV/K positive temperature coefficient. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection nodes with 275 mW total power dissipation on FR4 PCB.
For engineers reviewing the BZX84W-B6V8F datasheet, BZX84W-B6V8F pinout, BZX84W-B6V8F application, or BZX84W-B6V8F equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient sign/magnitude, junction-to-ambient thermal resistance (455 K/W), reverse leakage at VR = 4 V (2 µA), and SOT323 footprint compatibility with high-frequency layout constraints.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a precise DC reference voltage under varying load and temperature conditions. Its 6.8 V nominal Zener voltage is specified at IZ = 5 mA with ±2 % initial tolerance and exhibits a +3.0 mV/K temperature coefficient - indicating voltage increases linearly with junction temperature.
The device uses silicon planar epitaxial construction and is optimized for surface-mount reliability in space-constrained applications. With 200 mA maximum forward current and 40 W non-repetitive peak reverse power capability (tp = 100 µs), it supports transient clamping and regulated biasing without thermal runaway when mounted per standard FR4 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.66 V to 6.94 V at IZ = 5 mA - defines tight regulation window for precision reference use |
| Differential Resistance (rdif) | 80 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +3.0 mV/K at IZ = 5 mA - enables predictable voltage drift compensation in thermal-aware designs |
| Reverse Leakage (IR) | 2 µA max at VR = 4 V - ensures minimal quiescent current in standby or low-power modes |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets continuous operating limit for thermal design |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W - quantifies self-heating impact on voltage stability and lifetime under sustained load |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased clamp or logic interface roles |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm body size, and 0.65 mm pitch. Designed for reflow soldering with standardized footprint (2.65 mm × 2.35 mm solder land area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated terminal - must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode (K) | Reverse-bias terminal where regulated voltage appears; tied to higher-potential rail in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter closed-loop regulation without post-production trimming in feedback networks |
| +3.0 mV/K temperature coefficient | Supports predictable voltage scaling across −55 °C to +150 °C ambient range for industrial-grade stability |
| 80 Ω differential resistance | Minimizes output voltage shift under ±1 mA load variation - critical for ADC reference buffering |
| 275 mW power rating on FR4 | Permits direct integration into 3.3 V/5 V supply rails without external heat sinking in compact layouts |
| 2 µA reverse leakage at 4 V | Reduces error contribution in high-impedance sensing nodes and battery-powered voltage monitors |
Applications
| Power Supply Feedback Loop | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage of a buck converter by feeding sampled output into error amplifier via resistive divider. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 6.8 V threshold for comparator or op-amp input. Use Value: Maintains ±0.14 V regulation window across temperature, reducing output drift to < ±1.2 % over −40 °C to +85 °C. |
Use Scenario: Protecting microcontroller I/O pins from ESD or surge events exceeding 6.8 V. IC Role / Device Role / Timing Role: Fast-acting clamping element diverting excess energy to ground before damage occurs. Use Value: Limits transient voltage to ≤7.2 V within 10 ns response time, compatible with 200 mA peak surge rating. |
| ADC Reference Buffer | Low-Power Sensor Biasing |
Use Scenario: Providing stable excitation voltage to resistive temperature sensor (RTD) in portable instrumentation. IC Role / Device Role / Timing Role: Precision voltage source referenced to system ground, driving high-impedance sensor bridge. Use Value: Delivers 6.8 V ±0.14 V with <0.5 mV/K drift, enabling <0.1 °C measurement resolution over full operating range. |
Use Scenario: Biasing photodiode anode in optical smoke detector front-end circuit. IC Role / Device Role / Timing Role: Low-noise, low-leakage DC bias generator maintaining constant reverse bias across photodiode junction. Use Value: Contributes only 2 µA leakage at 4 V reverse bias, preserving picoamp-level photocurrent integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5235B | 6.8 V ±5 % tolerance, 100 Ω rdif, −2.5 mV/K tempco, 350 mW Ptot | Higher tolerance and negative tempco reduce accuracy in temperature-stable references but improve thermal margin in high-power clamps | Select when cost sensitivity outweighs precision needs and thermal derating headroom is required |
| Vishay BZX84-C6V8 | 6.8 V ±5 % tolerance, 150 Ω rdif, +4.0 mV/K tempco, same SOT323 package | Looser tolerance and higher tempco increase voltage drift but simplify sourcing due to broader industry adoption | Choose for legacy designs where ±5 % is acceptable and cross-manufacturer second-sourcing is prioritized |
Compared with BZX84W-B6V8F, MMBZ5235B trades precision for thermal robustness, while BZX84-C6V8 sacrifices regulation tightness for supply-chain flexibility - making the BZX84W-B6V8F optimal for new designs demanding ±2 % stability and predictable +3.0 mV/K drift behavior.
Availability
BZX84W-B6V8F is available at Aetrix Electronics and suitable for power supply feedback loops, overvoltage protection clamps, and low-power sensor biasing requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for BZX84W-B6V8F 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 stable voltage regulation in space-constrained SMT applications where precision, thermal predictability, and long-term reliability are essential.
FAQ
What is the maximum reverse voltage this Zener diode can withstand continuously?
The BZX84W-B6V8F has a nominal Zener voltage of 6.8 V and is rated for continuous operation up to its specified Zener voltage under defined test conditions. Its absolute maximum limiting value for non-repetitive peak reverse power is 40 W (tp = 100 µs), but sustained reverse voltage must remain within the 6.66 V–6.94 V regulation band at IZ = 5 mA to ensure stable performance and avoid thermal runaway.
Can this device be used in forward-bias applications?
Yes - the BZX84W-B6V8F has a forward voltage of ≤0.9 V at 10 mA, making it suitable for low-drop rectification or logic-level clamping in forward conduction. However, its primary design intent is reverse-bias Zener regulation, and forward-current capability is limited to 200 mA maximum, with no guaranteed parameters beyond basic VF specification.
How does the not-connected (n.c.) pin affect PCB layout?
Pin 2 is internally unconnected and must remain floating on the PCB - no trace, pad, or solder mask opening should contact it. Including it in copper pours or routing signals nearby may introduce parasitic capacitance (>0.5 pF) or leakage paths that degrade high-frequency regulation performance and increase noise susceptibility in sensitive analog nodes.
Is this part qualified for automotive applications?
No - the BZX84W-B6V8F is explicitly designated as non-automotive qualified per Nexperia's revision history. It lacks AEC-Q200 stress testing and automotive-grade process controls. For automotive use, Nexperia offers the -Q qualified variants (e.g., BZX84W-Q series), which undergo extended temperature cycling, humidity testing, and failure analysis per automotive standards.
BZX84W-B6V8F 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):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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-B6V8F FAQ
1.How can I place an order for BZX84W-B6V8F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B6V8F 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-B6V8F reliable?
The price and inventory of BZX84W-B6V8F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B6V8F is usually 5 days.
3.What payment methods are accepted for BZX84W-B6V8F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B6V8F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B6V8F?
BZX84W-B6V8F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B6V8F 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-B6V8F?
For technical support, including BZX84W-B6V8F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B6V8F requirements.
6.How does Aetrix verify that BZX84W-B6V8F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B6V8F 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-B6V8F meets industry standards.
7.What is the process for return or replacement of BZX84W-B6V8F?
All BZX84W-B6V8F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B6V8F, 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-B6V8F part is unused and in its original packaging.
Return procedure for BZX84W-B6V8F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B6V8F Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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