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Nexperia USA Inc. BZX84W-B3V0F
- Part No.:
- BZX84W-B3V0F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B3V0F.pdf
- Description:
- DIODE ZENER 3V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4
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Product details
Overview
BZX84W-B3V0F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 3.0 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, power supply feedback loops, and overvoltage protection circuits.
For engineers reviewing the BZX84W-B3V0F datasheet, BZX84W-B3V0F pinout, BZX84W-B3V0F application, or BZX84W-B3V0F equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (95 Ω at 5 mA), reverse leakage current (10 µA at 1 V), thermal resistance (455 K/W), and SOT323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load or input conditions. Its ±2 % tolerance and low 95 Ω differential resistance at 5 mA ensure tight regulation accuracy and minimal voltage drift with current changes.
The device exhibits a negative temperature coefficient of −2.1 mV/K at 5 mA, enabling predictable thermal behavior in ambient ranges from −55 °C to +150 °C. Its 275 mW power rating is defined for FR4 PCB mounting with single-sided copper and standard SOT323 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal at IZ = 5 mA; ensures precise 3.0 V reference within ±2 % (2.94–3.06 V) for feedback or clamping. |
| Tolerance | ±2 % (B-series); guarantees tighter voltage control than ±5 % C-series variants for critical regulation tasks. |
| Differential Resistance (rdif) | 95 Ω max at IZ = 5 mA; limits output voltage variation to ≤0.475 V per 5 mA current shift. |
| Reverse Leakage (IR) | 10 µA max at VR = 1 V; minimizes standby current draw in battery-powered or low-quiescent circuits. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; defines safe continuous operating envelope without derating. |
| Junction Temperature (Tj) | 150 °C max; supports operation in industrial environments with elevated ambient temperatures. |
| Thermal Resistance (Rth(j-a)) | 455 K/W; indicates ~125 °C rise above ambient at full 275 mW dissipation on standard PCB. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height; optimized for automated reflow assembly and space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration. |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required. |
| 3 | Cathode (K) | Reverse-biased terminal; connects to regulated voltage node and current-limiting resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 steps-covers most analog reference and clamp requirements without custom design. |
| Low differential resistance | 95 Ω max at 5 mA-enables stable regulation under dynamic load shifts in feedback networks. |
| High-frequency suitability | 6 pF capacitance at 1 MHz and 0 V-minimizes phase shift in fast-switching or RF-coupled protection paths. |
| Robust thermal performance | 150 °C max junction temperature-supports reliable operation in sealed enclosures or thermally dense assemblies. |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt reference connected to optocoupler input or error amplifier feedback node. Use Value: ±2 % VZ tolerance and 95 Ω rdif ensure <±1 % output voltage accuracy across line/load/temperature. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 3.3 V rail. IC Role / Device Role / Timing Role: Reverse-biased clamp between signal line and ground, activated above 3.0 V. Use Value: 10 µA leakage at 1 V prevents false triggering; 275 mW Ptot absorbs short-duration ESD events. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Providing stable 3.0 V bias for op-amp comparators or ADC reference dividers. IC Role / Device Role / Timing Role: Precision DC voltage source replacing larger three-terminal regulators in low-current paths. Use Value: −2.1 mV/K temperature coefficient enables predictable drift compensation in sensor front-ends. |
Use Scenario: Shifting 5 V logic signals down to 3.0 V compatible levels for mixed-voltage interfaces. IC Role / Device Role / Timing Role: Cathode tied to 3.0 V rail, anode to 5 V signal-clamps high state to VZ + VF. Use Value: 0.9 V forward voltage at 10 mA ensures clean 3.0 V logic high with <10 ns response to edge transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V0 | ±5 % tolerance (3.0 V ±0.15 V), higher 150 Ω rdif, same SOT323 package. | Acceptable where cost sensitivity outweighs regulation precision; less suitable for closed-loop feedback. | Select when budget constraints dominate and ±5 % VZ meets system margin requirements. |
| MMSZ4683T1G | ±5 % tolerance, 3.3 V nominal, 500 mW Ptot, SOD-123 package (larger footprint). | Higher power handling but incompatible pinout; requires PCB redesign and lacks 3.0 V option. | Choose only if 3.3 V reference suffices and board layout allows SOD-123 placement and thermal relief. |
Compared with BZX84W-B3V0F, BZX84-C3V0 trades regulation accuracy for cost, while MMSZ4683T1G offers higher power but sacrifices voltage match and package compatibility-making BZX84W-B3V0F optimal for space-constrained 3.0 V precision shunt needs.
Availability
BZX84W-B3V0F is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision reference voltage generation requiring stable component supply across industrial, consumer, and embedded designs.
Supply support for BZX84W-B3V0F 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, high-frequency-stable voltage regulation in space-constrained SMT applications.
FAQ
What is the maximum reverse current at 1 V for BZX84W-B3V0F?
The maximum reverse current (leakage) is 10 µA at VR = 1 V and Tj = 25 °C, as specified in Table 7 of the datasheet. This low leakage ensures minimal loading on upstream circuitry in reference or clamp configurations.
Can BZX84W-B3V0F be used in high-frequency circuits?
Yes-it exhibits only 6 pF junction capacitance at 1 MHz and 0 V bias (Table 8), enabling effective use in RF decoupling, fast transient clamping, and clock signal conditioning up to ~100 MHz without significant attenuation.
Is the n.c. pin on BZX84W-B3V0F electrically isolated?
Yes, Pin 2 is internally not connected and must remain unconnected on the PCB. No trace, pad, or solder mask should contact it, as confirmed by the "n.c." designation in Table 2 and the simplified outline graphic in the datasheet.
How does temperature affect the Zener voltage of BZX84W-B3V0F?
It has a temperature coefficient of −2.1 mV/K at 5 mA (Table 8), meaning VZ decreases by approximately 2.1 mV per degree Celsius rise in junction temperature-critical for predicting drift in non-temperature-compensated circuits.
BZX84W-B3V0F 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):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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-B3V0F FAQ
1.How can I place an order for BZX84W-B3V0F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B3V0F 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-B3V0F reliable?
The price and inventory of BZX84W-B3V0F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B3V0F is usually 5 days.
3.What payment methods are accepted for BZX84W-B3V0F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B3V0F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B3V0F?
BZX84W-B3V0F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B3V0F 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-B3V0F?
For technical support, including BZX84W-B3V0F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B3V0F requirements.
6.How does Aetrix verify that BZX84W-B3V0F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B3V0F 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-B3V0F meets industry standards.
7.What is the process for return or replacement of BZX84W-B3V0F?
All BZX84W-B3V0F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B3V0F, 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-B3V0F part is unused and in its original packaging.
Return procedure for BZX84W-B3V0F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B3V0F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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