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Nexperia USA Inc. BZX84W-C22X
- Part No.:
- BZX84W-C22X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C22X.pdf
- Description:
- DIODE ZENER 22V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:839
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Product details
Overview
BZX84W-C22X from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 22 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 250 Ω differential resistance at IZ = 5 mA - used for precision low-power voltage reference and overvoltage clamping in compact DC power rails.
For engineers reviewing the BZX84W-C22X datasheet, BZX84W-C22X pinout, BZX84W-C22X application, or BZX84W-C22X equivalent, this part supports stable regulation in space-constrained consumer and industrial PCBs where thermal resistance (455 K/W) and low capacitance (1.25 pF at 1 MHz) are critical for noise-sensitive analog and mixed-signal circuits.
Technical Context
This Zener diode operates in reverse breakdown with a temperature coefficient of +18.4 mV/K at IZ = 5 mA, indicating positive drift with junction temperature - requiring thermal derating above 25 °C ambient. Its non-repetitive peak reverse power dissipation reaches 40 W for 100 µs pulses, enabling transient surge suppression in low-energy interfaces.
The device features a not-connected (n.c.) terminal (Pin 2), isolating the anode (Pin 1) and cathode (Pin 3) to minimize parasitic coupling. With 100 nA reverse current at VR = 8 V and 200 nA at VR = 7 V, it delivers tight leakage control for battery-backed or ultra-low-quiescent circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.8 V to 23.3 V at IZ = 5 mA - defines regulated output range under nominal bias |
| Tolerance | ±5 % - specifies maximum deviation from 22 V nominal for production yield planning |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines regulation stiffness against load current variation |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling |
| Junction Temperature (Tj) | −55 °C to +150 °C - defines operational thermal envelope for reliability validation |
| Reverse Current (IR) | 100 nA at VR = 8 V - ensures minimal standby leakage in high-impedance reference nodes |
| Capacitance (Cd) | 1.25 pF at f = 1 MHz, VR = 0 V - enables use in RF-coupled or high-frequency bypass applications |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side of regulated node |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire - must remain unconnected on PCB |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential side for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V across E24 series - supports standardized voltage reference selection without custom design |
| Low dynamic impedance | 250 Ω max at 5 mA - maintains <1 % output deviation under ±1 mA load step changes |
| Ultra-low capacitance | 1.25 pF - avoids signal integrity degradation in >100 MHz clock or RF detector circuits |
| High pulse power capability | 40 W non-repetitive peak at 100 µs - clamps ESD transients per IEC 61000-4-2 Level 4 without failure |
| Thermal stability | +18.4 mV/K tempco - predictable drift allows compensation in temperature-critical references |
Applications
| Power Supply Reference | ESD Protection Node |
|---|---|
|
Use Scenario: Providing stable 22 V reference for ADC voltage dividers and op-amp bias networks in portable instrumentation. IC Role / Device Role / Timing Role: Zener regulator establishing fixed reference potential independent of input rail fluctuations. Use Value: 250 Ω rdif limits reference error to ≤0.25 V under 1 mA load shift, ensuring <0.1 % measurement accuracy. |
Use Scenario: Clamping data line surges in USB 2.0 interface protection circuits before transceiver ICs. IC Role / Device Role / Timing Role: Low-capacitance shunt element diverting fast transients (<1 ns rise time) to ground. Use Value: 1.25 pF capacitance preserves signal edge integrity while 40 W pulse rating absorbs 8 kV contact ESD events. |
| Low-Power Sensor Bias | Overvoltage Crowbar |
|
Use Scenario: Biasing MEMS pressure sensor bridges in battery-powered IoT nodes with 3.3 V supply rails. IC Role / Device Role / Timing Role: Precision voltage clamp limiting excitation voltage to prevent sensor saturation. Use Value: 100 nA reverse leakage at 8 V ensures <100 nA quiescent current draw, extending 10-year battery life. |
Use Scenario: Triggering SCR-based crowbar in 24 V industrial PLC power modules during overvoltage faults. IC Role / Device Role / Timing Role: Zener sensing element initiating gate drive when input exceeds 22 V threshold. Use Value: ±5 % tolerance ensures reliable trip point between 20.8 V and 23.3 V, avoiding nuisance triggering. |
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 MMBZ5248BS-7-F | 22 V ±5 %, SOT-323, 200 mW Ptot, 300 Ω rdif | Lower power rating reduces thermal margin in sustained 5 mA operation | Select when legacy ON Semi BOM alignment required and derated power suffices |
| Vishay BZX84-C22-TP | 22 V ±5 %, SOT-23, 350 mW Ptot, 150 Ω rdif, 3-pin active layout | SOT-23 footprint increases board area but improves heat dissipation | Select when higher power handling or lower impedance is prioritized over miniaturization |
Compared with MMBZ5248BS-7-F, BZX84W-C22X offers +75 mW power headroom and −50 Ω lower impedance for tighter regulation; versus BZX84-C22-TP, it trades 75 mW extra dissipation for 0.4 mm² smaller footprint and eliminates Pin 2 ambiguity in layout routing.
Availability
BZX84W-C22X is available at Aetrix Electronics and suitable for power supply reference, ESD protection node, and low-power sensor bias applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX84W-C22X 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, headquartered in Nijmegen, Netherlands.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and clamping in consumer, industrial, and computing applications where SOT323 size and ±2 %/±5 % tolerance options are essential.
FAQ
What is the maximum continuous forward current for BZX84W-C22X?
The absolute maximum forward current is 200 mA per the limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 10 mA risks exceeding the 275 mW total power dissipation limit due to VF ≈ 0.9 V, potentially degrading long-term Zener voltage stability.
Can BZX84W-C22X replace a through-hole 1N4742A in a new design?
No - BZX84W-C22X is a surface-mount SOT323 device with different thermal characteristics (455 K/W vs. ~100 K/W for 1N4742A), lower power rating (275 mW vs. 1000 mW), and distinct pinout (3-pin with n.c.). Direct replacement requires PCB redesign, thermal analysis, and verification of regulation accuracy under actual load conditions.
How does the n.c. pin affect PCB layout and soldering?
Pin 2 is internally unconnected and must remain unattached on the PCB. The footprint must provide a pad for mechanical stability but no copper trace; solder mask should fully cover it to prevent accidental bridging. Reflow profiles must follow Nexperia's SOT323 guidelines to avoid tombstoning due to asymmetric thermal mass.
Is BZX84W-C22X suitable for automotive applications?
No - the datasheet explicitly states this part is non-automotive qualified (Rev. 2, Section 13). It lacks AEC-Q200 qualification, extended temperature validation beyond −55 °C to +150 °C, and automotive-grade process controls. For automotive use, Nexperia's -Q qualified variants (e.g., BZX84W-C22-Q) must be selected.
BZX84W-C22X 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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 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-C22X FAQ
1.How can I place an order for BZX84W-C22X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C22X 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-C22X reliable?
The price and inventory of BZX84W-C22X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C22X is usually 5 days.
3.What payment methods are accepted for BZX84W-C22X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C22X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C22X?
BZX84W-C22X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C22X 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-C22X?
For technical support, including BZX84W-C22X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C22X requirements.
6.How does Aetrix verify that BZX84W-C22X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C22X 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-C22X meets industry standards.
7.What is the process for return or replacement of BZX84W-C22X?
All BZX84W-C22X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C22X, 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-C22X part is unused and in its original packaging.
Return procedure for BZX84W-C22X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C22X Tags
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