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Nexperia USA Inc. BZX84W-B22-QF
- Part No.:
- BZX84W-B22-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B22-QF.pdf
- Description:
- DIODE ZENER 22V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,028
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Product details
Overview
BZX84W-B22-QF 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 qualified to AEC-Q101 for automotive use. It provides stable voltage reference in low-power biasing, overvoltage clamping, and signal-level regulation circuits.
For engineers reviewing the BZX84W-B22-QF datasheet, BZX84W-B22-QF pinout, BZX84W-B22-QF application, or BZX84W-B22-QF equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, thermal resistance, and automotive qualification status - all critical for precision analog design and automotive-grade component selection.
Technical Context
This Zener diode operates in reverse breakdown with a nominal VZ of 21.6–22.4 V at IZ = 5 mA, exhibiting a positive temperature coefficient of +18.4 mV/K and differential resistance of 250 Ω at the same current. Its low 1.25 pF capacitance at 1 MHz supports high-frequency stabilization without signal distortion.
Designed for surface-mount reliability, it features a 455 K/W junction-to-ambient thermal resistance on FR4 PCB and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses. The anode–cathode–n.c. terminal configuration enables unidirectional clamping with minimal board footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.6 V to 22.4 V at IZ = 5 mA - defines precise regulation point for 22 V reference applications |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Differential Resistance (rdif) | 250 Ω at IZ = 5 mA - determines load regulation sensitivity and output impedance |
| Temperature Coefficient (SZ) | +18.4 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling under standard mounting |
| Reverse Current (IR) | 50 nA at VR = 15.4 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Diode Capacitance (Cd) | 1.25 pF at f = 1 MHz, VR = 0 V - enables use in RF coupling and fast transient suppression without capacitive loading |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint optimized for high-density PCB layouts and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during Zener operation |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and infotainment systems requiring extended temperature (-55 °C to +150 °C) and reliability compliance |
| Low 1.25 pF capacitance | Minimizes high-frequency signal attenuation in ESD protection and RF bias networks |
| 250 Ω differential resistance | Enables stable regulation under varying load currents up to 5 mA without external compensation |
| 455 K/W thermal resistance | Supports predictable junction temperature rise on standard FR4 boards, simplifying thermal margin analysis |
| Non-repetitive 40 W surge rating | Withstands transient overvoltage events such as ISO 7637-2 pulse 1/2a in automotive supply lines |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamp 24 V supply transients in engine control unit power distribution networks. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy above 22 V threshold. Use Value: Limits rail voltage to ≤22.4 V during load-dump events, protecting downstream 3.3 V/5 V regulators and microcontrollers. |
Use Scenario: Provide stable 22 V reference for precision op-amp biasing in industrial pressure sensor front-ends. IC Role / Device Role / Timing Role: Passive voltage reference element establishing fixed headroom for analog signal conditioning stages. Use Value: Delivers ±2 % voltage accuracy and <1.3 pF capacitance, preserving signal integrity and minimizing offset drift across temperature. |
| USB-C Port Overvoltage Protection | Telecom Line Interface Voltage Clamp |
|
Use Scenario: Protect USB-C CC logic pins from accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Fast-acting shunt clamp activated when CC line exceeds 22 V due to fault condition. Use Value: Responds within nanoseconds with 50 nA leakage at 15.4 V, ensuring no interference with normal 0–5 V CC signaling. |
Use Scenario: Suppress lightning-induced surges on telecom line interface circuits operating near 24 V nominal. IC Role / Device Role / Timing Role: Primary overvoltage limiter placed before TVS diode array to reduce stress on secondary protection. Use Value: Absorbs initial 40 W surge energy (100 µs) while maintaining <22.4 V clamping, extending overall system surge lifetime. |
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-Q | ±5 % tolerance (20.8–23.3 V), higher max leakage (50 nA at 15.4 V vs. 50 nA at same voltage), identical package and power rating | Acceptable where tighter voltage accuracy is not required, e.g., non-critical power monitoring | Select for cost-sensitive designs where 5 % tolerance meets functional safety thresholds |
| MMSZ5247B-TP | ±5 % tolerance (20.9–23.1 V), 500 mW Ptot, SOD-123 package (larger footprint), 300 Ω rdif | Higher power handling but incompatible with ultra-dense SOT323 layouts; requires different PCB land pattern | Choose only if >275 mW continuous dissipation is needed and board space permits larger package |
Compared with BZX84W-C22-Q, the BZX84W-B22-QF offers tighter voltage control essential for precision references; versus MMSZ5247B-TP, it trades power capacity for miniaturization and automotive qualification - making it optimal for space-constrained, AEC-compliant designs.
Availability
BZX84W-B22-QF is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, USB-C port safeguarding, and telecom line interface clamping requiring stable component supply across production lifecycles.
Supply support for BZX84W-B22-QF 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 components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation in automotive power management and industrial signal conditioning applications.
FAQ
What is the maximum continuous reverse current the BZX84W-B22-QF can sustain at 25 °C?
The device sustains up to 12.3 mA continuous reverse current at 22 V, calculated from its 275 mW power rating (Ptot/VZ = 275 mW / 22 V). This assumes ambient temperature remains at 25 °C on a standard FR4 PCB; derating applies above that temperature per its 455 K/W thermal resistance.
Does the n.c. pin require PCB routing or grounding?
No - Pin 2 is internally not connected and must remain un-routed and un-soldered on the PCB. Routing or grounding it introduces parasitic capacitance and potential contamination risk; the datasheet explicitly defines it as "not connected" with no internal bond wire or die attachment.
How does the +18.4 mV/K temperature coefficient affect long-term stability in a 105 °C underhood environment?
At ΔT = 80 K (from 25 °C to 105 °C), the Zener voltage increases by approximately 1.47 V (18.4 mV/K × 80 K), shifting VZ from 22.0 V to ~23.47 V. This is within the device's specified 21.6–22.4 V range at 25 °C but reflects actual operational drift - design margins must accommodate this full shift.
Can BZX84W-B22-QF replace BZX84C22 in existing designs?
Yes, electrically and physically - both share SOT323 package, 22 V nominal Zener voltage, and cathode/anode pinout. However, BZX84W-B22-QF adds AEC-Q101 qualification, tighter ±2 % tolerance, and lower 1.25 pF capacitance, making it suitable for upgraded automotive or high-frequency applications without layout changes.
BZX84W-B22-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±1.82%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B22-QF FAQ
1.How can I place an order for BZX84W-B22-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B22-QF 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-B22-QF reliable?
The price and inventory of BZX84W-B22-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B22-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B22-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B22-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B22-QF?
BZX84W-B22-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B22-QF 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-B22-QF?
For technical support, including BZX84W-B22-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B22-QF requirements.
6.How does Aetrix verify that BZX84W-B22-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B22-QF 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-B22-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B22-QF?
All BZX84W-B22-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B22-QF, 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-B22-QF part is unused and in its original packaging.
Return procedure for BZX84W-B22-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B22-QF 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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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
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BZT52C3V6LP-7
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SMAZ12-13-F
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