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Nexperia USA Inc. BZX84W-B22X
- Part No.:
- BZX84W-B22X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B22X.pdf
- Description:
- DIODE ZENER 22V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,148
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Product details
Overview
BZX84W-B22X from Nexperia is a ±2 % 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 voltage reference and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the BZX84W-B22X datasheet, BZX84W-B22X pinout, BZX84W-B22X application, or BZX84W-B22X equivalent, this page delivers verified Zener parameters, thermal resistance (455 K/W), reverse leakage (≤50 nA at 0.7×VZnom), junction temperature limit (150 °C), and SC-70 footprint compatibility for PCB layout validation.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable DC voltage under varying load or supply conditions. Its ±2 % tolerance ensures tight regulation across production batches, and its 18.4 mV/K temperature coefficient at IZ = 5 mA defines predictable drift behavior in ambient temperature shifts from 25 °C to 150 °C.
The device supports non-repetitive surge handling up to 40 W for 100 µs pulses and exhibits 1.25 pF capacitance at 1 MHz and 0 V reverse bias - enabling use in high-frequency decoupling and noise-sensitive reference paths without introducing parasitic coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.6 V to 22.4 V at IZ = 5 mA - defines precise clamping threshold for 22 V rail stabilization |
| Tolerance | ±2 % - enables tighter voltage margin control vs. ±5 % variants in feedback loops |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Reverse Leakage (IR) | ≤50 nA at VR = 15.4 V (0.7×VZnom) - ensures minimal quiescent current in standby mode |
| Junction Temperature (Tj) | 150 °C max - constrains thermal design margin for reliability in enclosed environments |
| Thermal Resistance (Rth(j-a)) | 455 K/W - quantifies self-heating rise per watt on single-sided FR4 board |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint and 0.65 mm pitch; optimized for reflow soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or thermal pad connection |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 steps - supports standardized voltage references across analog subsystems |
| Low capacitance | 1.25 pF at 1 MHz - minimizes high-frequency signal distortion in RF bias networks |
| High surge capability | 40 W non-repetitive peak power (100 µs pulse) - withstands transient overvoltage events |
| Stable temperature coefficient | +18.4 mV/K at IZ = 5 mA - enables predictable drift compensation in temperature-critical references |
| Standardized marking | Mark code J9% - allows rapid visual identification and traceability on assembled PCBs |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 22 V reference for op-amp biasing and ADC reference buffers in industrial sensor signal chains. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to deliver fixed voltage node independent of input ripple. Use Value: ±2 % tolerance and 250 Ω rdif ensure <±0.5 V deviation across 1–10 mA load current variation. |
Use Scenario: Protecting microcontroller GPIO pins from ESD-induced transients in automotive body control modules. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage to 22 V during fast-rising surges (tr < 1 ns). Use Value: 40 W non-repetitive surge rating absorbs 100 µs pulses without degradation, preserving downstream IC integrity. |
| Low-Power Voltage Monitor | RF Bias Network Stabilizer |
|
Use Scenario: Enabling undervoltage lockout (UVLO) detection in battery-powered IoT nodes using comparator input threshold. IC Role / Device Role / Timing Role: Precision Zener generating 22 V threshold for comparator trip point with minimal hysteresis. Use Value: ≤50 nA reverse leakage at 15.4 V ensures <1 µA current draw - extending coin-cell lifetime beyond 5 years. |
Use Scenario: Stabilizing gate bias voltage for GaN FET drivers in 5G base station front-end amplifiers. IC Role / Device Role / Timing Role: Low-capacitance (1.25 pF) Zener maintaining DC bias while minimizing RF signal path loading. Use Value: Sub-2 pF capacitance prevents impedance mismatch and insertion loss above 2 GHz in RF matching networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C22 | ±5 % tolerance (20.8 V–23.3 V), higher rdif (250 Ω typ.), same package and Ptot | Acceptable where 22 V ±5 % meets system margin; less suitable for precision feedback | Select when cost sensitivity outweighs regulation accuracy requirements |
| MMSZ5247B | ±5 % tolerance, SOD-123 package, 500 mW Ptot, 30 Ω rdif, 30 V Zener option only | Higher power handling but larger footprint; not drop-in compatible due to different package and pinout | Choose only if board redesign accommodates SOD-123 and higher power is required |
Compared with BZX84W-B22X, BZX84W-C22 trades regulation accuracy for broader voltage tolerance, while MMSZ5247B offers lower impedance but requires mechanical redesign - making BZX84W-B22X optimal for space-constrained, precision 22 V reference designs.
Availability
BZX84W-B22X is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery management systems, and RF bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-B22X 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 advanced packaging and automotive-grade qualification.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for stable voltage regulation in consumer, industrial, and communication equipment where small size and consistent parametric performance are critical.
FAQ
What is the maximum continuous reverse current the BZX84W-B22X can handle at 25 °C?
The device has no specified maximum continuous reverse current; instead, it is limited by power dissipation. At 25 °C ambient, with 275 mW Ptot and 22 V Zener voltage, the maximum steady-state reverse current is approximately 12.5 mA (275 mW ÷ 22 V), assuming negligible forward drop and no derating.
Can BZX84W-B22X be used in place of a 22 V Zener with ±5 % tolerance?
Yes, but only where tighter regulation is beneficial. The BZX84W-B22X provides ±2 % tolerance (21.6–22.4 V) versus ±5 % (20.8–23.3 V) for C-series parts. This improves stability in feedback loops but may require verification of circuit margin against the narrower voltage window.
Is Pin 2 internally connected, and what happens if it's soldered to ground?
No - Pin 2 is explicitly marked "n.c." (not connected) in the datasheet and must remain electrically isolated. Soldering it to ground creates an unintended short path, potentially causing open-circuit failure or unpredictable Zener behavior due to internal die contamination or bond wire stress.
How does thermal resistance affect BZX84W-B22X performance in a 70 °C ambient environment?
With Rth(j-a) = 455 K/W, a 275 mW dissipation raises junction temperature by 125 °C above ambient. At 70 °C ambient, Tj reaches 195 °C - exceeding the 150 °C absolute maximum. Derating to ≤175 mW (or improving copper area/thermal vias) is mandatory for reliable operation.
BZX84W-B22X 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:
- ±2%
- 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-B22X FAQ
1.How can I place an order for BZX84W-B22X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B22X 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-B22X reliable?
The price and inventory of BZX84W-B22X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B22X is usually 5 days.
3.What payment methods are accepted for BZX84W-B22X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B22X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B22X?
BZX84W-B22X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B22X 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-B22X?
For technical support, including BZX84W-B22X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B22X requirements.
6.How does Aetrix verify that BZX84W-B22X is sourced from the original manufacturer or authorized distributors?
All BZX84W-B22X 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-B22X meets industry standards.
7.What is the process for return or replacement of BZX84W-B22X?
All BZX84W-B22X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B22X, 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-B22X part is unused and in its original packaging.
Return procedure for BZX84W-B22X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B22X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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