My Inquiry
My Account
Nexperia USA Inc. BZX84W-B22-QX
- Part No.:
- BZX84W-B22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B22-QX.pdf
- Description:
- DIODE ZENER 22V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,371
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84W-B22-QX 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 regulation circuits, ESD protection clamping networks, and biasing stages of sensor interfaces and power management ICs.
For engineers reviewing the BZX84W-B22-QX datasheet, BZX84W-B22-QX pinout, BZX84W-B22-QX application, or BZX84W-B22-QX equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (250 Ω at 5 mA), junction temperature limit (150 °C), and automotive qualification status - all critical for precision reference and harsh-environment reliability.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 21.6 V to 22.4 V at IZ = 5 mA, exhibiting a positive temperature coefficient of +18.4 mV/K. Its differential resistance of 250 Ω (max) at 5 mA ensures predictable dynamic impedance under varying load conditions.
The device features a non-connected (n.c.) terminal (Pin 2), enabling simplified PCB layout and isolation of unused terminals in high-density designs. Thermal resistance from junction to ambient is 455 K/W on standard FR4, defining its derating behavior above 25 °C ambient.
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 feedback loops and reference generation |
| Tolerance | ±2 % - enables tighter system-level voltage accuracy without external trimming |
| Differential Resistance (rdiff) | 250 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 - sets maximum continuous DC or low-duty-cycle pulse handling capability |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Reverse Current (IR) | 50 nA max at VR = 15.4 V - ensures minimal leakage in high-impedance bias networks |
| Capacitance (Cd) | 1.25 pF at f = 1 MHz, VR = 0 V - preserves signal integrity in RF-coupled clamp or high-frequency reference paths |
Pinout & Package
SOT323 (SC-70) surface-mount plastic package with 3 leads, leadless construction, and standard footprint per Figure 9 (reflow) and Figure 10 (wave) in the datasheet. Dimensions: 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating or grounded per layout best practice to avoid parasitic coupling |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring stress-tested reliability |
| ±2 % Zener voltage tolerance | Reduces need for post-production calibration in precision voltage reference circuits |
| Low 1.25 pF capacitance | Minimizes signal distortion in high-frequency clamping and RF detector biasing |
| Non-repetitive peak reverse power: 40 W | Withstands transient surges up to 100 µs duration, supporting robust ESD and surge protection functions |
| Thermal resistance: 455 K/W | Enables accurate thermal derating on standard FR4 PCBs without heatsinking |
Applications
| Automotive Sensor Biasing | USB Port ESD Clamp |
|---|---|
Use Scenario: Providing stable bias voltage to analog output sensors (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Zener reference diode establishing fixed reference potential for sensor excitation and ADC input scaling. Use Value: ±2 % tolerance and 150 °C junction rating ensure consistent sensor accuracy across full automotive temperature range. |
Use Scenario: Low-capacitance clamping of USB D+/D− lines against IEC 61000-4-2 Level 4 ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between data line and ground, leveraging fast response and low Cd. Use Value: 1.25 pF capacitance avoids signal integrity degradation at 480 Mbps USB 2.0 data rates. |
| Industrial PLC Input Protection | Low-Power SMPS Feedback Reference |
Use Scenario: Overvoltage protection for 24 V digital input channels in programmable logic controllers. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to safe levels during field-wiring faults or induced transients. Use Value: 40 W non-repetitive peak power rating absorbs 1 kV/500 A surge pulses per IEC 61000-4-5. |
Use Scenario: Secondary-side voltage reference in isolated flyback converters delivering <10 W output. IC Role / Device Role / Timing Role: Precision Zener setting feedback threshold for optocoupler-driven regulation loop. Use Value: 250 Ω differential resistance ensures stable loop gain and minimal output voltage drift over load variation. |
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 V–23.3 V), higher max differential resistance (250 Ω vs. same), identical package and power rating | Acceptable where system-level tolerance budget allows looser reference accuracy | Select when cost sensitivity outweighs need for tight voltage stability |
| MMSZ5247B-TP | ±5 % tolerance (21.0 V–23.0 V), SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified | Larger footprint and no automotive qualification; suited for commercial-grade power supplies | Choose only for non-automotive designs requiring higher power dissipation |
Compared with BZX84W-B22-QX, the BZX84W-C22-Q trades voltage accuracy for broader tolerance compliance, while MMSZ5247B-TP offers higher power but lacks automotive qualification and uses a larger package - making BZX84W-B22-QX optimal for space-constrained, AEC-Q101–compliant 22 V reference needs.
Availability
BZX84W-B22-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port ESD protection, and industrial PLC input protection requiring stable component supply, AEC-Q101 traceability, and SOT323 footprint compatibility.
Supply support for BZX84W-B22-QX 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
BZX84W-Q series belongs to Nexperia's AEC-Q101–qualified Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in automotive electronics and high-reliability industrial systems.
FAQ
What is the Zener test current for BZX84W-B22-QX?
The Zener voltage is specified at IZ = 5 mA, as confirmed in Table 8 of the datasheet. This current establishes the nominal 22 V regulation point and is used for measuring differential resistance and temperature coefficient. Operating significantly below this current increases dynamic impedance and reduces regulation accuracy.
Is Pin 2 internally connected or truly isolated?
Pin 2 is explicitly designated "n.c." (not connected) in Table 2 and the simplified outline diagram. It is electrically isolated from the die and must not be bonded or soldered to any circuit node. Leaving it unconnected or grounding it via PCB copper (with no electrical tie) is acceptable per Nexperia's layout guidance.
Can BZX84W-B22-QX replace older BZX84-C22 in existing designs?
Yes, with caveats: BZX84W-B22-QX has tighter ±2 % tolerance versus ±5 % for BZX84-C22, identical SOT323 package, and AEC-Q101 qualification. However, its differential resistance (250 Ω max) is higher than legacy BZX84-C22 (typically ~150 Ω), which may affect loop stability in sensitive feedback circuits - verify under actual load conditions.
What is the maximum allowable surge current for transient suppression?
At tp = 100 µs, the non-repetitive peak reverse current IZSM is 1.82 A (calculated from PZSM = 40 W and VZ ≈ 22 V). This value is valid only for single, non-repetitive events; repeated surges require derating per Figure 1 in the datasheet to avoid junction overheating.
BZX84W-B22-QX 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-QX FAQ
1.How can I place an order for BZX84W-B22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B22-QX 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-QX reliable?
The price and inventory of BZX84W-B22-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B22-QX?
BZX84W-B22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B22-QX 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-QX?
For technical support, including BZX84W-B22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B22-QX requirements.
6.How does Aetrix verify that BZX84W-B22-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B22-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B22-QX?
All BZX84W-B22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B22-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZX84W-B22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B22-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
