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Nexperia USA Inc. BZX84W-C4V7X
- Part No.:
- BZX84W-C4V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C4V7X.pdf
- Description:
- DIODE ZENER 4.7V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,746
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Product details
Overview
BZX84W-C4V7X from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, providing precise 4.7 V reverse breakdown at IZ = 5 mA, with 80 Ω differential resistance and 3 µA reverse current at VR = 2 V, used for low-power voltage reference and overvoltage protection in compact DC power rails.
For engineers reviewing the BZX84W-C4V7X datasheet, BZX84W-C4V7X pinout, BZX84W-C4V7X application, or BZX84W-C4V7X equivalent, this page delivers verified Zener parameters, thermal derating guidance, SOT323 terminal mapping, and direct alternatives for 4.7 V regulation in space-constrained designs.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 4.7 V across its cathode-anode terminals under regulated current conditions (IZ = 5 mA). Its temperature coefficient of −1.4 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 withstands non-repetitive 40 W surge pulses (tp = 100 µs), supporting transient suppression in low-current bias networks and feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 4.40 V to 5.00 V at IZ = 5 mA - defines usable regulation window for 4.7 V nominal reference |
| Differential resistance rdif | 80 Ω max at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse current IR | 3 µA max at VR = 2 V - sets minimum leakage in standby or high-impedance sensing nodes |
| Total power dissipation Ptot | 275 mW at Tamb = 25 °C on standard FR4 - limits continuous current to ~58 mA at 4.7 V |
| Junction-to-ambient Rth(j-a) | 455 K/W - requires thermal derating above 25 °C ambient; full rating only below 75 °C case temp |
| Forward voltage VF | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased clamp configurations |
| Capacitance Cd | 6 pF at f = 1 MHz, VR = 0 V - enables stable operation in high-frequency feedback loops up to ~250 MHz |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads, 1.3 mm × 1.8 mm footprint, 0.65 mm lead pitch, and 0.9 mm maximum height. Optimized for reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; carries forward current or sink current during regulation |
| 2 | Not connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Connected to higher-potential node; source of regulated voltage output in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical 4.7 V references where tight initial accuracy is not required |
| Low 6 pF junction capacitance | Minimizes phase shift in high-frequency feedback networks, supporting stable operation in switching regulator error amplifiers |
| Non-repetitive 40 W surge rating | Provides transient immunity against ESD and line surges without external TVS, reducing BOM count in input protection stages |
| −1.4 mV/K temperature coefficient | Delivers predictable negative drift, allowing compensation in precision references using complementary positive-coefficient components |
| SOT323 package compatibility | Supports automated placement and reflow on standard 0603-class pick-and-place equipment with verified IPC-compliant footprints |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Shunt-connected across optocoupler LED in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise 4.7 V threshold for error amplifier input. Use Value: Maintains ±2 % output regulation over line/load/temperature with <1 % drift contribution from VZ tolerance and TC. |
Use Scenario: Cathode tied to 3.3 V GPIO pin, anode grounded, with series current-limiting resistor. IC Role / Device Role / Timing Role: Clamping diode limiting pin voltage to 4.7 V during ESD events or bus faults. Use Value: Prevents latch-up by clamping transients within 10 ns while drawing <100 µA leakage at 3.3 V. |
| Low-Power Sensor Bias Voltage | Reference for ADC Input Protection |
Use Scenario: Providing stable 4.7 V excitation to resistive bridge sensor in battery-powered IoT node. IC Role / Device Role / Timing Role: Passive voltage reference sourcing <200 µA to bridge, replacing active LDO for ultra-low quiescent current. Use Value: Enables 12-bit measurement stability with <0.5 LSB error from Zener drift over −40 °C to +85 °C. |
Use Scenario: Connected between ADC input and ground to limit overvoltage before internal ESD diodes activate. IC Role / Device Role / Timing Role: Pre-emptive clamp protecting SAR ADC front-end from >5 V transients. Use Value: Reduces risk of input stage damage by diverting >500 mA surge current away from sensitive analog input circuitry. |
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 MMBZ5225BS-TP | 4.6 V nominal, ±5 %, 500 mW Ptot, SOT-23 package | Higher power rating supports 100 mA continuous current but larger footprint and 2× thermal resistance | Select when higher surge energy handling or legacy SOT-23 board compatibility is required |
| Vishay BZX84-C4V7-TP | Identical 4.7 V ±5 % spec, same SOT323 package, but 350 mW Ptot and 100 Ω rdif | Higher power allows greater current margin but increased dynamic impedance degrades regulation accuracy | Choose for designs needing extended thermal headroom without changing layout or footprint |
Compared with BZX84W-C4V7X, MMBZ5225BS-TP offers higher surge robustness at the cost of board area and thermal performance, while BZX84-C4V7-TP trades tighter regulation for improved thermal margin-making the Nexperia part optimal for space-constrained, precision-limited applications.
Availability
BZX84W-C4V7X is available at Aetrix Electronics and suitable for power supply feedback reference, microcontroller I/O clamping, low-power sensor biasing, and ADC input protection requiring stable component supply and consistent Zener voltage performance.
Supply support for BZX84W-C4V7X 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, cost-sensitive voltage regulation and protection in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous Zener current for BZX84W-C4V7X at 85 °C ambient?
At 85 °C ambient, the device's 275 mW power rating must be derated using its 455 K/W thermal resistance. With a 150 °C max junction temperature, allowable power drops to 143 mW, supporting ~30 mA continuous Zener current at 4.7 V-well below the 200 mA absolute maximum forward current limit.
Can BZX84W-C4V7X replace a 5.1 V Zener in a 3.3 V logic interface?
No-its 4.4–5.0 V regulation range is insufficient to reliably clamp above 3.3 V logic levels without risking false triggering. A 3.9 V or 4.3 V Zener (e.g., BZX84W-C3V9X) would provide safer 0.6–0.8 V headroom while maintaining adequate noise margin and leakage control.
Is the n.c. pin (Pin 2) safe to connect to ground for thermal relief?
No-Pin 2 is internally unconnected and must remain electrically floating. Connecting it to ground or any net violates the SOT323 mechanical design, risks shorting adjacent traces, and may compromise solder joint integrity during reflow due to asymmetric thermal mass.
How does the −1.4 mV/K temperature coefficient affect long-term voltage stability?
Over a 100 °C temperature span (−25 °C to +75 °C), the coefficient causes ~140 mV total drift-approximately ±1.5 % of nominal 4.7 V. This is acceptable for non-precision references but requires compensation (e.g., series thermistor) in applications demanding <0.1 % stability across temperature.
BZX84W-C4V7X 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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-C4V7X FAQ
1.How can I place an order for BZX84W-C4V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C4V7X 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-C4V7X reliable?
The price and inventory of BZX84W-C4V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C4V7X is usually 5 days.
3.What payment methods are accepted for BZX84W-C4V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C4V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C4V7X?
BZX84W-C4V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C4V7X 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-C4V7X?
For technical support, including BZX84W-C4V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C4V7X requirements.
6.How does Aetrix verify that BZX84W-C4V7X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C4V7X 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-C4V7X meets industry standards.
7.What is the process for return or replacement of BZX84W-C4V7X?
All BZX84W-C4V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C4V7X, 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-C4V7X part is unused and in its original packaging.
Return procedure for BZX84W-C4V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C4V7X 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
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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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