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Nexperia USA Inc. BZX84W-C22F
- Part No.:
- BZX84W-C22F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C22F.pdf
- Description:
- DIODE ZENER 22V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
BZX84W-C22F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 22 V regulation, 250 Ω differential resistance at 5 mA, 18.4 mV/K temperature coefficient, and 275 mW total power dissipation in SOT323 (SC-70) package; used for precision voltage reference and overvoltage clamping in low-power analog signal conditioning circuits.
For engineers reviewing the BZX84W-C22F datasheet, BZX84W-C22F pinout, BZX84W-C22F application, or BZX84W-C22F equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient stability across operating current, junction-to-ambient thermal resistance, and SC-70 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode-anode terminals when reverse current exceeds knee threshold. It exhibits 20.8 V to 23.3 V regulation range at 5 mA test current and 100 nA maximum reverse leakage at 15.4 V (0.7 × VZnom).
Its SOT323 package delivers 455 K/W junction-to-ambient thermal resistance on FR4 PCB with single-sided copper, enabling reliable operation up to 150 °C junction temperature. The non-connected terminal (Pin 2) electrically isolates the internal die pad from external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal; 20.8 V to 23.3 V min/max at IZ = 5 mA - defines regulated output voltage window under standard bias |
| Tolerance | ±5 % - specifies worst-case deviation from nominal VZ, critical for reference accuracy in feedback networks |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | 18.4 mV/K typical - quantifies VZ drift per degree Celsius, essential for temperature-stable references |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous reverse power handling before thermal derating |
| Reverse Leakage Current (IR) | 100 nA max at VR = 15.4 V - ensures minimal quiescent current in high-impedance bias networks |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines forward conduction drop during polarity-reversal protection use cases |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads; leadless construction optimized for automated reflow assembly and space-constrained designs. Thermal performance validated on FR4 PCB with single-sided copper and standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal for forward conduction; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated pad; no electrical function - must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode (K) | Negative terminal for reverse-bias operation; tied to regulated output node in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 series - supports broad system-level voltage reference needs without custom part qualification |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) - enables cost-performance trade-off between precision and procurement flexibility |
| Low capacitance | 1.25 pF at 1 MHz, VR = 0 V - minimizes signal distortion in RF and high-frequency filtering applications |
| High surge capability | 40 W non-repetitive peak reverse power at tp = 100 µs - provides transient overvoltage immunity in noisy industrial environments |
| Standardized marking | "S4%" code per Table 4 - enables rapid visual identification of 22 V ±5 % variant on assembled PCBs |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 22 V reference for op-amp feedback networks in DC-DC converter error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise regulation setpoint for closed-loop control. Use Value: Maintains ±5 % output accuracy across temperature and line variations due to 18.4 mV/K coefficient and 250 Ω rdif. |
Use Scenario: Protecting microcontroller GPIO pins from 24 V field bus transients in industrial sensor interfaces. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor clamping positive surges to 22 V + VF and negative excursions to −0.9 V. Use Value: Limits clamp voltage to ≤22.9 V while absorbing 40 W pulses, preventing latch-up in 3.3 V logic inputs. |
| Signal Level Shifting | High-Frequency Bias Network |
|
Use Scenario: Generating 22 V bias for RF amplifier drain supply in narrowband IoT transceivers. IC Role / Device Role / Timing Role: Low-noise DC voltage source stabilizing active device operating point. Use Value: 1.25 pF capacitance avoids resonance with matching networks up to 2.4 GHz, preserving PA efficiency. |
Use Scenario: Setting bias point for JFET-based audio preamplifier stages requiring ultra-low leakage. IC Role / Device Role / Timing Role: High-impedance voltage divider element minimizing current draw from passive RC networks. Use Value: 100 nA max reverse leakage at 15.4 V preserves bias stability in >10 MΩ impedance nodes over temperature. |
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 MMBZ5247BS | 22 V ±5 %, 200 mW Ptot, 350 Ω rdif, SOT-323 package | Lower power rating reduces thermal margin in sustained 5 mA operation | Select when legacy ON Semi sourcing is required and 275 mW headroom is not needed |
| Vishay BZX84-C22 | 22 V ±5 %, 300 mW Ptot, 250 Ω rdif, same SOT-323 footprint but different marking | Higher power rating allows extended duty-cycle operation without derating | Prefer for thermally demanding environments where 25 °C ambient cannot be guaranteed |
Compared with BZX84W-C22F, MMBZ5247BS trades 75 mW power headroom for established second-source availability, while BZX84-C22 offers higher thermal robustness at identical electrical specs - both require validation of marking and solder paste volume compatibility with existing reflow profiles.
Availability
BZX84W-C22F is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, and high-frequency bias network implementation requiring stable component supply and consistent SOT323 packaging.
Supply support for BZX84W-C22F 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 manufacturing rooted in process optimization and automotive-grade quality systems.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained applications requiring stable voltage regulation across consumer, industrial, and communications equipment.
FAQ
What is the maximum reverse current the BZX84W-C22F can sustain continuously?
The device supports up to 200 mA forward current, but for Zener operation, continuous reverse current is limited by thermal constraints. At 25 °C ambient on FR4 PCB, 275 mW power dissipation permits ~12.5 mA average reverse current (22 V × 12.5 mA = 275 mW), derating linearly above 25 °C per 455 K/W thermal resistance.
Does Pin 2 (n.c.) require PCB trace routing or thermal relief?
No - Pin 2 is internally not connected and must remain electrically floating. PCB layout should omit solder mask opening and avoid copper pour or trace adjacency to prevent parasitic capacitance or unintended coupling; no thermal relief or thermal pad is required or recommended.
How does the ±5 % tolerance affect regulation accuracy in a 22 V reference circuit?
At 5 mA test current, the actual Zener voltage falls between 20.8 V and 23.3 V. In a feedback loop with 1 % resistor tolerance, overall reference uncertainty becomes ±5.6 % worst-case, making this variant suitable for non-critical biasing but not precision ADC references where <±1 % total error is required.
Can BZX84W-C22F replace BZX84-C22 in existing designs?
Yes - both share identical electrical specifications, SOT323 package, and pinout. BZX84W-C22F replaces legacy BZX84-C22 with improved thermal characterization (455 K/W verified on FR4) and updated non-automotive qualification status per Rev. 2 datasheet, requiring no layout or schematic changes.
BZX84W-C22F 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-C22F FAQ
1.How can I place an order for BZX84W-C22F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C22F 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-C22F reliable?
The price and inventory of BZX84W-C22F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C22F is usually 5 days.
3.What payment methods are accepted for BZX84W-C22F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C22F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C22F?
BZX84W-C22F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C22F 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-C22F?
For technical support, including BZX84W-C22F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C22F requirements.
6.How does Aetrix verify that BZX84W-C22F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C22F 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-C22F meets industry standards.
7.What is the process for return or replacement of BZX84W-C22F?
All BZX84W-C22F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C22F, 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-C22F part is unused and in its original packaging.
Return procedure for BZX84W-C22F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C22F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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