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Nexperia USA Inc. BZX84W-C3V0X
- Part No.:
- BZX84W-C3V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C3V0X.pdf
- Description:
- DIODE ZENER 3V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,136
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Product details
Overview
BZX84W-C3V0X from Nexperia is a ±5 % 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 10 µA reverse current at 1 V, used for precision low-voltage regulation in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX84W-C3V0X datasheet, BZX84W-C3V0X pinout, BZX84W-C3V0X application, or BZX84W-C3V0X equivalent, this page delivers verified electrical parameters, thermal behavior, SOT323 terminal mapping, and real-world use cases for stable 3.0 V reference generation and overvoltage clamping.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 3.0 V reference across load and line variations, with differential resistance of 95 Ω at 5 mA and temperature coefficient of −2.1 mV/K - enabling predictable drift compensation in ambient ranges from −55 °C to +150 °C.
Designed for surface-mount reliability on FR4 PCBs, it supports pulsed reverse power up to 40 W (100 µs), forward voltage ≤0.9 V at 10 mA, and junction-to-ambient thermal resistance of 455 K/W under standard single-sided copper mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal at IZ = 5 mA; tight ±5 % tolerance ensures accurate 2.8–3.2 V regulation window for low-voltage logic supply stabilization. |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; defines maximum continuous DC power handling without derating in standard layouts. |
| Differential Resistance (rdif) | 95 Ω at IZ = 5 mA; quantifies output impedance - lower values improve regulation against load current changes. |
| Reverse Current (IR) | 10 µA at VR = 1 V; confirms low leakage below breakdown, critical for battery-powered standby circuits. |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; enables use as low-drop rectifier or ESD clamp in bidirectional protection schemes. |
| Junction Temperature (Tj) | 150 °C maximum; sets upper thermal limit for operation and influences long-term reliability in enclosed environments. |
| Capacitance (Cd) | 6 pF at f = 1 MHz, VR = 0 V; supports high-frequency noise suppression and RF decoupling applications. |
Pinout & Package
SOT323 (SC-70) leadless plastic package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height, optimized for automated reflow assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential side in reverse-bias regulation; must be held at voltage ≤ (VZ − Vin) to enable conduction. |
| 2 | Not Connected (n.c.) | Internally unconnected; no PCB trace or solder joint required - avoids unintended parasitic coupling or thermal path errors. |
| 3 | Cathode (K) | Connected to higher-potential side; source of regulated 3.0 V output when reverse-biased - polarity-critical for correct Zener operation. |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Ensures consistent 3.0 V regulation across production lots without post-assembly trimming or calibration. |
| 275 mW power rating on FR4 | Enables direct replacement of through-hole Zeners in compact DC-DC feedback networks without heatsinking. |
| 95 Ω dynamic impedance at 5 mA | Delivers <1 % output variation over ±10 mA load shifts - suitable for analog sensor biasing and ADC reference stabilization. |
| −2.1 mV/K temperature coefficient | Provides predictable, linear drift for compensated reference designs operating from −40 °C to +85 °C ambient. |
| 6 pF junction capacitance | Minimizes signal distortion in high-speed clamping applications such as USB data line ESD protection. |
Applications
| Low-Voltage Microcontroller Reset Circuit | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Generating a clean 3.0 V reset threshold for ARM Cortex-M0+ MCUs powered from 3.3 V LDOs. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference in RC-based reset generator, defining exact trip point for POR and brown-out detection. Use Value: Tight ±5 % tolerance and low 10 µA leakage ensure deterministic reset assertion timing across temperature and unit-to-unit variation. |
Use Scenario: Protecting USB 2.0 D+ and D− lines from transient surges exceeding 3.6 V during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional clamp using two BZX84W-C3V0X diodes (anode-to-ground, cathode-to-rail) limits voltage swing to ±3.0 V. Use Value: 6 pF capacitance preserves signal integrity up to 480 Mbps; 40 W non-repetitive surge rating absorbs ESD pulses per IEC 61000-4-2 Level 4. |
| Industrial Sensor Signal Conditioning | Li-ion Battery Cell Voltage Monitor |
|
Use Scenario: Stabilizing excitation voltage for 3.0 V bridge sensors (e.g., pressure transducers) in 24 V field instruments. IC Role / Device Role / Timing Role: Shunt regulator maintains constant 3.0 V across Wheatstone bridge, rejecting supply ripple and enabling ratiometric ADC measurements. Use Value: 95 Ω dynamic impedance suppresses >90 % of 100 mVpp input ripple at 5 mA load, improving measurement SNR by ≥12 dB. |
Use Scenario: Providing a stable 3.0 V reference for comparator-based cell undervoltage lockout in 2S Li-ion battery packs. IC Role / Device Role / Timing Role: Zener establishes precise 3.0 V threshold to trigger cutoff before cell discharge reaches 2.5 V, preventing deep discharge damage. Use Value: −2.1 mV/K tempco aligns with Li-ion voltage slope, reducing false trips across −20 °C to +60 °C operating range. |
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 MMBZ5223BLT1G | 3.0 V, ±5 %, 350 mW, SOT-23 package, 17 Ω rdif at 20 mA | Higher power and lower impedance suit higher-current regulation but require larger footprint and different layout. | Select when >10 mA load current or tighter regulation under varying loads is required. |
| Vishay BZX84-C3V0-TP | 3.0 V, ±5 %, 300 mW, SOT-23, 100 Ω rdif at 5 mA, same marking code M5% | Identical electrical specs but slightly higher Ptot; not validated for FR4 thermal performance matching Nexperia's 275 mW rating. | Acceptable for cost-sensitive designs where 25 mW margin is acceptable and thermal validation is performed. |
Compared with MMBZ5223BLT1G, BZX84W-C3V0X offers superior board-area efficiency and lower thermal resistance on FR4, while Vishay's BZX84-C3V0-TP trades marginal power headroom for equivalent regulation accuracy - making the Nexperia part optimal for ultra-compact, thermally constrained designs.
Availability
BZX84W-C3V0X is available at Aetrix Electronics and suitable for low-voltage regulation, ESD clamping, and sensor reference applications requiring stable component supply, full traceability, and guaranteed long-term sourcing.
Supply support for BZX84W-C3V0X 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.
BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for high-volume, space-constrained applications demanding stable voltage references and robust transient suppression in SOT323 packaging.
FAQ
What is the maximum continuous reverse current the BZX84W-C3V0X can handle?
The device supports a maximum continuous forward current of 200 mA per Absolute Maximum Ratings, but Zener operation relies on controlled reverse current. At 3.0 V regulation, typical operating reverse current ranges from 1 mA to 20 mA; sustained currents above 25 mA require thermal derating due to its 275 mW power limit on FR4 PCBs.
Can BZX84W-C3V0X be used in place of a 3.3 V Zener diode?
No - BZX84W-C3V0X is specified for 3.0 V nominal Zener voltage with ±5 % tolerance (2.8–3.2 V range). Substituting it for a 3.3 V part would cause under-regulation, potentially leading to system instability or failure to meet voltage thresholds in 3.3 V logic interfaces.
Is pin 2 (n.c.) required to be left floating on the PCB?
Yes - Pin 2 is internally not connected and must remain un-soldered and un-traced. Connecting it risks introducing parasitic capacitance, unintended thermal paths, or mechanical stress that could compromise long-term reliability or parametric consistency.
How does the −2.1 mV/K temperature coefficient affect circuit performance?
This coefficient means the Zener voltage decreases by 2.1 mV per degree Celsius rise in junction temperature. Over a 100 °C range (−25 °C to +75 °C), VZ shifts by ~210 mV - a design consideration for precision references, but beneficial for compensating positive-tempco components like resistors or op-amps in mixed-technology circuits.
BZX84W-C3V0X 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:
- ±5%
- 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-C3V0X FAQ
1.How can I place an order for BZX84W-C3V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C3V0X 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-C3V0X reliable?
The price and inventory of BZX84W-C3V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C3V0X is usually 5 days.
3.What payment methods are accepted for BZX84W-C3V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C3V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C3V0X?
BZX84W-C3V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C3V0X 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-C3V0X?
For technical support, including BZX84W-C3V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C3V0X requirements.
6.How does Aetrix verify that BZX84W-C3V0X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C3V0X 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-C3V0X meets industry standards.
7.What is the process for return or replacement of BZX84W-C3V0X?
All BZX84W-C3V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C3V0X, 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-C3V0X part is unused and in its original packaging.
Return procedure for BZX84W-C3V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C3V0X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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SMAJ4744A-TP
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