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Nexperia USA Inc. BZX84W-B8V2X
- Part No.:
- BZX84W-B8V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B8V2X.pdf
- Description:
- DIODE ZENER 8.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
BZX84W-B8V2X from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 8.2 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 150 °C maximum junction temperature. It serves as a precision voltage reference or shunt regulator in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX84W-B8V2X datasheet, BZX84W-B8V2X pinout, BZX84W-B8V2X application, or BZX84W-B8V2X equivalent, key selection criteria include Zener voltage tolerance (±2%), differential resistance (80 Ω at 5 mA), temperature coefficient (+4.6 mV/K), reverse leakage (700 nA at 5 V), and thermal resistance (455 K/W).
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 8.04 V to 8.36 V at IZ = 5 mA, exhibiting a positive temperature coefficient of +4.6 mV/K - enabling predictable drift compensation in temperature-sensitive references. Its low 80 Ω differential resistance ensures stable regulation under small load current variations.
The device is optimized for surface-mount use on FR4 PCBs with single-sided copper, delivering 275 mW power handling at 25 °C ambient and supporting non-repetitive surge capability up to 40 W (100 µs pulse). Its 150 °C max junction temperature and −55 °C to +150 °C operating range support industrial-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.04 V to 8.36 V at IZ = 5 mA - defines precise shunt regulation point for 8.2 V nominal rail |
| Tolerance | ±2% - enables tighter output voltage control vs. ±5% variants in feedback or reference paths |
| Differential Resistance (rdif) | 80 Ω at IZ = 5 mA - determines regulation stiffness and output impedance in shunt configuration |
| Temperature Coefficient (SZ) | +4.6 mV/K - quantifies voltage drift per degree Celsius rise, critical for thermal stability |
| Reverse Leakage (IR) | 700 nA at VR = 5 V - ensures minimal quiescent current draw in standby or low-power modes |
| Total Power Dissipation (Ptot) | 275 mW on FR4 PCB - sets maximum continuous DC power handling without heatsinking |
| Thermal Resistance (Rth(j-a)) | 455 K/W - defines junction-to-ambient temperature rise per watt, guiding thermal design margin |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint and 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side in Zener operation (reverse bias applied) |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder joint required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential side to enable Zener conduction and voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without post-calibration in 8.2 V applications |
| Low differential resistance (80 Ω) | Minimizes output voltage variation under ±1 mA load current shifts in shunt regulators |
| Positive temperature coefficient (+4.6 mV/K) | Allows predictable thermal drift modeling and compensation in precision analog circuits |
| 150 °C maximum junction temperature | Supports reliable operation in enclosed industrial enclosures or high-ambient environments |
| FR4-compatible 275 mW power rating | Eliminates need for thermal vias or copper pours in standard PCB layouts |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 8.2 V reference for linear regulator feedback or ADC reference buffer. IC Role / Device Role / Timing Role: Shunt voltage reference element establishing precise DC bias point. Use Value: ±2% tolerance and 80 Ω rdif ensure reference deviation remains under ±90 mV across load and temperature. |
Use Scenario: Protecting microcontroller GPIO or sensor input from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting input to ≤8.36 V during surges. Use Value: 40 W non-repetitive peak power rating absorbs 100 µs transients without degradation. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Biasing op-amp input stages or level-shifting analog sensor outputs to 8.2 V rails. IC Role / Device Role / Timing Role: DC voltage translation node defining common-mode offset. Use Value: Low 700 nA reverse leakage avoids loading high-impedance sensor sources. |
Use Scenario: Setting bias current in constant-current LED drivers or transistor amplifiers. IC Role / Device Role / Timing Role: Stable voltage source for resistor-based current generation. Use Value: +4.6 mV/K temperature coefficient enables predictable current drift tracking in thermal designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C8V2 | ±5% tolerance (7.7 V–8.7 V), same package and Ptot | Acceptable where 8.2 V ±0.5 V meets system margin; higher leakage (1.5×) | Select when cost sensitivity outweighs voltage accuracy requirements |
| MMSZ4687T1G | ±5% tolerance, 8.2 V nominal, SOD-123 package, 500 mW rating | Larger footprint, higher power, but no n.c. pin - requires different layout and thermal strategy | Choose for higher power headroom or legacy SOD-123 board compatibility |
Compared with BZX84W-B8V2X, BZX84W-C8V2 trades voltage precision for cost, while MMSZ4687T1G offers greater power handling at the expense of board space and pinout simplicity - making the BZX84W-B8V2X optimal for space-constrained, accuracy-critical 8.2 V shunt regulation.
Availability
BZX84W-B8V2X is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, and analog signal conditioning requiring stable component supply and consistent ±2% Zener tolerance.
Supply support for BZX84W-B8V2X 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 precision voltage regulation in compact SMT applications where tight tolerance, low leakage, and thermal robustness are critical.
FAQ
What is the Zener voltage range and test condition for BZX84W-B8V2X?
The BZX84W-B8V2X has a guaranteed Zener voltage range of 8.04 V to 8.36 V, measured at a test current of 5 mA and ambient temperature of 25 °C. This range reflects its ±2% tolerance specification and is validated per IEC 60134 absolute maximum rating methodology.
Is Pin 2 internally connected, and what happens if it is soldered?
No, Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia datasheet and simplified outline. It is electrically isolated inside the package. Soldering or routing to Pin 2 introduces no functional benefit and risks mechanical stress or solder bridging - it must remain unconnected per design.
How does the +4.6 mV/K temperature coefficient affect circuit performance?
The +4.6 mV/K coefficient means the Zener voltage increases by approximately 4.6 mV per degree Celsius rise in junction temperature. At 8.2 V nominal, this yields ~0.056% per °C drift - critical for applications requiring <0.5% total voltage error across −40 °C to +125 °C operating range.
Can BZX84W-B8V2X replace older BZX84-C8V2 in existing designs?
Yes, but only if the ±2% tolerance and lower differential resistance (80 Ω vs. ~100 Ω for C-grade) improve regulation performance without violating layout or thermal constraints. The SOT323 package and pinout are identical, and the n.c. Pin 2 matches both variants - no footprint change is needed.
BZX84W-B8V2X 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):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 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-B8V2X FAQ
1.How can I place an order for BZX84W-B8V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B8V2X 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-B8V2X reliable?
The price and inventory of BZX84W-B8V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B8V2X is usually 5 days.
3.What payment methods are accepted for BZX84W-B8V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B8V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B8V2X?
BZX84W-B8V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B8V2X 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-B8V2X?
For technical support, including BZX84W-B8V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B8V2X requirements.
6.How does Aetrix verify that BZX84W-B8V2X is sourced from the original manufacturer or authorized distributors?
All BZX84W-B8V2X 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-B8V2X meets industry standards.
7.What is the process for return or replacement of BZX84W-B8V2X?
All BZX84W-B8V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B8V2X, 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-B8V2X part is unused and in its original packaging.
Return procedure for BZX84W-B8V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B8V2X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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onsemi
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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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SMAZ12-13-F
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