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Nexperia USA Inc. BZX84W-B3V3F
- Part No.:
- BZX84W-B3V3F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B3V3F.pdf
- Description:
- DIODE ZENER 3.3V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,384
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Product details
Overview
BZX84W-B3V3F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 3.3 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 150 °C maximum junction temperature. It serves as a precision reference or low-power voltage clamp in signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX84W-B3V3F datasheet, BZX84W-B3V3F pinout, BZX84W-B3V3F application, or BZX84W-B3V3F equivalent, key selection factors include its 3.3 V Zener voltage with ±2 % tolerance, 95 Ω differential resistance at 5 mA, −2.4 mV/K temperature coefficient, and suitability for high-frequency regulation in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its cathode-anode terminals under controlled current conditions. Its −2.4 mV/K temperature coefficient indicates predictable, slightly negative drift over temperature, enabling compensation in reference designs.
The device exhibits 5 µA maximum reverse leakage at VR = 1 V and 95 Ω typical differential resistance at IZ = 5 mA - critical for low-noise regulation and minimal output impedance in feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.23 V to 3.37 V at IZ = 5 mA - defines tight regulation window for 3.3 V rail referencing |
| Tolerance | ±2 % - enables high-accuracy voltage setting without external trimming |
| Differential Resistance (rdif) | 95 Ω max at IZ = 5 mA - ensures low dynamic impedance for stable regulation under load variation |
| Reverse Leakage (IR) | 5 µA max at VR = 1 V - minimizes quiescent current in standby or low-power modes |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets practical DC current limit of ~83 mA at 3.3 V |
| Thermal Resistance (Rth(j-a)) | 455 K/W - determines junction-to-ambient temperature rise per watt, critical for thermal derating |
| Capacitance (Cd) | 6 pF at f = 1 MHz, VR = 0 V - supports high-frequency decoupling and noise suppression up to ~25 MHz |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.8 mm footprint, 0.95 mm height, 3-terminal configuration with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener operation (reverse bias) |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder mask relief required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node - carries regulated output voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct use in 3.3 V reference circuits without calibration or trimming components |
| 95 Ω differential resistance at 5 mA | Reduces output voltage deviation under ±1 mA load current change to < ±0.1 V |
| −2.4 mV/K temperature coefficient | Allows predictable drift compensation when paired with positive-TC components in bandgap references |
| 6 pF junction capacitance | Minimizes high-frequency signal loading in RF bias networks and fast-switching clamps |
| 275 mW power rating on standard FR4 | Supports continuous operation up to 83 mA at 3.3 V without heatsinking in compact layouts |
Applications
| Power Rail Clamping | Signal-Level Voltage Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage during ESD events or bus contention. IC Role / Device Role / Timing Role: Shunt clamping element placed between I/O line and ground, conducting only above 3.3 V threshold. Use Value: Limits voltage excursion to ≤3.6 V (3.3 V + 5 µA × 95 Ω), preserving input stage integrity without adding series resistance. |
Use Scenario: Providing stable 3.3 V reference for ADC biasing or comparator hysteresis in sensor interface circuits. IC Role / Device Role / Timing Role: Passive two-terminal reference source delivering fixed potential with low dynamic impedance. Use Value: Delivers < ±10 mV error over 0–70 °C due to tight tolerance and known TC, eliminating need for trimming resistors. |
| Low-Power LDO Pre-Regulation | High-Frequency Bias Network Stabilization |
Use Scenario: Pre-regulating input to ultra-low-quiescent LDOs in battery-powered IoT nodes where supply varies from 3.6–4.2 V. IC Role / Device Role / Timing Role: Coarse voltage setter upstream of LDO, absorbing excess headroom as heat. Use Value: Dissipates up to 275 mW continuously, enabling >100 mA LDO input current while maintaining 3.3 V pre-regulation. |
Use Scenario: Stabilizing gate bias voltage in RF amplifier MMICs operating at 2.4 GHz ISM band. IC Role / Device Role / Timing Role: DC bias point stabilizer with minimal parasitic capacitance affecting matching networks. Use Value: 6 pF capacitance avoids resonance shifts in π-networks; 95 Ω rdif prevents Q-factor degradation in tuned circuits. |
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 MMBZ5226BS | 3.3 V, ±5 % tolerance, 100 Ω rdif, SOT-23 package | Higher tolerance and larger footprint; less precise but more robust surge handling | Select when cost sensitivity outweighs voltage accuracy and board space is unconstrained |
| Vishay BZX84-C3V3 | 3.3 V, ±5 % tolerance, 95 Ω rdif, same SOT323 package | Looser tolerance reduces reference stability but improves interchangeability across batches | Select when production volume demands broader parametric acceptance and thermal margin is primary concern |
Compared with BZX84W-B3V3F, MMBZ5226BS trades ±2 % accuracy for wider surge capability in SOT-23, while BZX84-C3V3 retains identical package and rdif but sacrifices 2.5× tighter voltage control - making BZX84W-B3V3F optimal for precision analog sensing and low-drift biasing.
Availability
BZX84W-B3V3F is available at Aetrix Electronics and suitable for power rail clamping, signal-level voltage reference, and low-power LDO pre-regulation requiring stable component supply across industrial control, medical instrumentation, and portable electronics programs.
Supply support for BZX84W-B3V3F 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 precision voltage regulation in space-constrained, high-frequency, and thermally demanding applications - not automotive-qualified per Rev. 2 (2023).
FAQ
What is the maximum continuous reverse current for reliable operation at 25 °C?
The BZX84W-B3V3F supports up to 83 mA continuous reverse current at 25 °C ambient, calculated from its 275 mW power rating and 3.3 V Zener voltage (275 mW ÷ 3.3 V ≈ 83 mA). Derating is required above 25 °C per its 455 K/W thermal resistance - e.g., 50 mA at 70 °C ambient.
Does Pin 2 require PCB connection or grounding?
No - Pin 2 is internally not connected (n.c.) and must remain electrically floating. No PCB trace, solder mask opening, or thermal pad is required. Connecting it risks internal shorting or undefined behavior, as confirmed in Nexperia's pinning diagram and package outline.
How does the −2.4 mV/K temperature coefficient affect regulation accuracy over −40 to +125 °C?
Over −40 to +125 °C, the coefficient causes a theoretical drift of −2.4 mV/K × 165 K = −396 mV. However, actual drift is bounded by the ±2 % initial tolerance (±66 mV) and nonlinear TC behavior - measured data shows < ±100 mV total shift across this range, verified in Nexperia's Fig. 6.
Can this Zener be used in place of a 3.3 V LDO for powering digital ICs?
No - the BZX84W-B3V3F is a shunt regulator, not a series regulator. It requires a current-limiting resistor and cannot source load current; it sinks excess current to maintain voltage. It is unsuitable as a standalone power supply but effective for clamping, referencing, or pre-regulation upstream of an LDO.
BZX84W-B3V3F 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):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-B3V3F FAQ
1.How can I place an order for BZX84W-B3V3F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B3V3F 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-B3V3F reliable?
The price and inventory of BZX84W-B3V3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B3V3F is usually 5 days.
3.What payment methods are accepted for BZX84W-B3V3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B3V3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B3V3F?
BZX84W-B3V3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B3V3F 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-B3V3F?
For technical support, including BZX84W-B3V3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B3V3F requirements.
6.How does Aetrix verify that BZX84W-B3V3F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B3V3F 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-B3V3F meets industry standards.
7.What is the process for return or replacement of BZX84W-B3V3F?
All BZX84W-B3V3F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B3V3F, 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-B3V3F part is unused and in its original packaging.
Return procedure for BZX84W-B3V3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B3V3F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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