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Nexperia USA Inc. BZX84W-C3V3X
- Part No.:
- BZX84W-C3V3X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C3V3X.pdf
- Description:
- DIODE ZENER 3.3V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,916
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Product details
Overview
BZX84W-C3V3X from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, with nominal Zener voltage 3.3 V at 5 mA, differential resistance ≤95 Ω, and reverse current ≤5 µA at VR = 1 V - used for precision low-voltage reference and overvoltage clamping in power supply feedback loops.
For engineers reviewing the BZX84W-C3V3X datasheet, BZX84W-C3V3X pinout, BZX84W-C3V3X application, or BZX84W-C3V3X equivalent, this page delivers verified Zener parameters, thermal derating guidance, SOT323 terminal mapping, and direct replacement options for 3.3 V regulation in space-constrained consumer and industrial PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 3.3 V across its cathode-anode terminals under regulated current conditions (IZ = 5 mA). Its temperature coefficient of −2.4 mV/K ensures predictable drift over −55 °C to +150 °C ambient range.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 275 mW total power dissipation and 455 K/W junction-to-ambient thermal resistance - requiring layout-aware thermal management for sustained operation above 100 mW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal at IZ = 5 mA; ±5% tolerance (3.10 V to 3.50 V) defines regulation window for low-voltage rail stabilization |
| Differential Resistance (rdif) | ≤95 Ω at IZ = 5 mA; determines output impedance and load regulation error under varying current |
| Reverse Current (IR) | ≤5 µA at VR = 1 V; sets minimum leakage in standby mode for battery-powered sensing circuits |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; enables bidirectional clamping when forward-biased in protection paths |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on standard FR4; requires derating above 25 °C per 455 K/W thermal resistance |
| Junction Temperature (Tj) | −55 °C to +150 °C operating range; supports industrial-grade thermal cycling without parameter shift |
| Package | SOT323 (SC-70); 1.3 mm × 2.2 mm footprint with 0.65 mm lead pitch - compatible with high-density reflow assembly |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with three terminals: anode (Pin 1), not connected (Pin 2), and cathode (Pin 3). Pin 2 is internally unconnected and must remain floating in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in Zener configuration; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | No internal bond wire; must be left unconnected on PCB to avoid parasitic coupling |
| 3 | Cathode (K) | Connected to higher-potential node; carries regulated Zener current during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective 3.3 V reference without trimming; suitable for non-critical biasing and clamping |
| Low differential resistance (≤95 Ω) | Minimizes output voltage variation under ±1 mA load current shifts in feedback networks |
| High-frequency capability | Diode capacitance ≤6 pF at 1 MHz and VR = 0 V supports ESD suppression up to ~100 MHz |
| FR4-compatible thermal performance | 275 mW rating on standard tin-plated single-sided copper allows direct integration into legacy layouts |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Clamps transient surges on USB VBUS line to prevent damage to downstream USB controllers. IC Role / Device Role / Timing Role: Zener diode placed between VBUS and ground, conducting above 3.3 V to shunt excess energy. Use Value: 5 µA max reverse leakage at 1 V ensures negligible standby current draw while maintaining fast response to 3.6 V+ transients. |
Use Scenario: Provides stable 3.3 V threshold for reset supervisor ICs monitoring 3.3 V system rails. IC Role / Device Role / Timing Role: Acts as precision voltage reference in RC-based reset timing network. Use Value: −2.4 mV/K temperature coefficient minimizes reset threshold drift across −40 °C to +85 °C operating range. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
|
Use Scenario: Supplies regulated bias voltage to analog sensor front-ends in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Zener configured in series with current-limiting resistor to generate fixed 3.3 V bias. Use Value: 95 Ω differential resistance ensures <10 mV output shift under 0.1 mA sensor current variation. |
Use Scenario: Stabilizes reference input of 12-bit SAR ADCs where supply ripple exceeds 10 mVpp. IC Role / Device Role / Timing Role: Shunt regulator parallel to ADC reference pin, absorbing supply noise. Use Value: 6 pF junction capacitance avoids high-frequency signal coupling into reference path at sampling rates up to 1 MSPS. |
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-TP | Same 3.3 V ±5%, but SOT-23 package (larger footprint, 2.9 mm × 1.3 mm) and higher rdif (130 Ω) | Less suitable for ultra-dense layouts; higher impedance reduces regulation accuracy under dynamic loads | Select when existing SOT-23 footprint reuse is prioritized over board area savings |
| Vishay BZX84-C3V3-TP | Identical electrical specs and SOT323 package, but ±5% tolerance achieved via different process control; same 5 µA IR at VR = 1 V | No functional difference in 3.3 V reference or clamping roles; fully interchangeable in production | Choose for dual-sourcing flexibility without layout or performance compromise |
Compared with MMBZ5226BS-TP, BZX84W-C3V3X offers 30% lower differential resistance and 40% smaller footprint; versus BZX84-C3V3-TP, it shares identical regulation behavior but differs in traceability and qualification status per Nexperia's non-automotive release.
Availability
BZX84W-C3V3X is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset networks, low-power sensor biasing, and ADC reference stabilization requiring stable component supply and tight Zener voltage control.
Supply support for BZX84W-C3V3X 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 mass-market electronics.
BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-sensitive voltage regulation and clamping in consumer, computing, and industrial applications.
FAQ
What is the maximum continuous reverse current the BZX84W-C3V3X can handle without degradation?
The device supports up to 200 mA forward current, but for Zener operation, the maximum DC reverse current is limited by power dissipation: at 25 °C ambient, 3.3 V × IZ ≤ 275 mW yields IZ ≤ 83 mA. Exceeding this without thermal derating risks junction overheating beyond 150 °C.
Can BZX84W-C3V3X be used in place of a 3.3 V LDO for powering small logic circuits?
No - it is a shunt regulator, not a series regulator. It requires a series current-limiting resistor and dissipates excess power as heat. It cannot source load current like an LDO; instead, it sinks current to maintain voltage, making it unsuitable as a primary power source for active loads exceeding a few hundred µA.
How does the "n.c." pin (Pin 2) affect PCB layout and thermal performance?
Pin 2 is internally unconnected and must remain unattached on the PCB. Routing copper to it creates parasitic capacitance and impedes solder joint reliability. Leaving it isolated preserves the specified 455 K/W thermal resistance and prevents unintended RF coupling in high-frequency applications.
Is BZX84W-C3V3X qualified for automotive applications?
No - per Nexperia's revision history, this part is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade traceability. For automotive use, select Nexperia's BZX84W-Q series variants, which undergo full automotive qualification and include extended temperature validation.
BZX84W-C3V3X 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:
- ±5%
- 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-C3V3X FAQ
1.How can I place an order for BZX84W-C3V3X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C3V3X 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-C3V3X reliable?
The price and inventory of BZX84W-C3V3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C3V3X is usually 5 days.
3.What payment methods are accepted for BZX84W-C3V3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C3V3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C3V3X?
BZX84W-C3V3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C3V3X 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-C3V3X?
For technical support, including BZX84W-C3V3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C3V3X requirements.
6.How does Aetrix verify that BZX84W-C3V3X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C3V3X 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-C3V3X meets industry standards.
7.What is the process for return or replacement of BZX84W-C3V3X?
All BZX84W-C3V3X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C3V3X, 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-C3V3X part is unused and in its original packaging.
Return procedure for BZX84W-C3V3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C3V3X 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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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