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Nexperia USA Inc. BZX384-B22-QX
- Part No.:
- BZX384-B22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B22-QX.pdf
- Description:
- DIODE ZENER 22V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,915
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Product details
Overview
BZX384-B22-QX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 22 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B22-QX datasheet, BZX384-B22-QX pinout, BZX384-B22-QX application, or BZX384-B22-QX equivalent, key selection criteria include its 22 V Zener voltage tolerance, low 250 mA forward current limit, 150 °C junction temperature rating, and automotive-grade qualification per AEC-Q101.
Technical Context
This device operates as a reverse-biased Zener diode with sharp breakdown at 22 V (IZ = 5 mA), exhibiting 15.4 mV/K temperature coefficient and ≤250 Ω differential resistance. It delivers stable regulation under DC or low-frequency transient conditions.
Designed for precision voltage clamping and reference functions, it supports non-repetitive surge handling up to 40 W (tp = 100 μs) and maintains <1.1 V forward voltage at 100 mA, enabling use in both regulation and protection roles within compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal at IZ = 5 mA; ±2 % tolerance ensures tight regulation in feedback loops |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; limits continuous thermal load on FR4 PCBs |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 5 mA; determines output impedance and regulation sensitivity |
| Reverse Current (IR) | ≤0.05 μA at VR = 17.6 V; defines leakage-induced error in high-impedance bias networks |
| Junction Temperature (Tj) | −65 °C to +150 °C; enables operation in under-hood automotive environments |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs; provides transient overvoltage suppression capability |
| Thermal Resistance (Rth(j-a)) | 415 K/W in free air; informs derating requirements for ambient temperature rise |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 2.7 mm × 1.6 mm footprint, cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity must be observed for correct Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±2 % Zener voltage tolerance | Enables tighter feedback accuracy than ±5 % variants without premium cost of ±1 % grade |
| Low-profile SOD323 package | Reduces board area by >50 % vs. DO-35; compatible with standard reflow soldering profiles |
| 40 W non-repetitive peak power | Clamps ESD and load-dump transients without failure in 12 V vehicle systems |
| 150 °C maximum junction temperature | Supports placement near heat-generating components in space-constrained modules |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing reference voltage for microcontroller ADC inputs in door module ECUs. IC Role / Device Role / Timing Role: Zener shunt regulator providing 22 V reference for LDO input stage and analog front-end biasing. Use Value: Maintains <±0.44 V regulation window across −40 °C to +125 °C ambient, ensuring consistent ADC full-scale accuracy. |
Use Scenario: Clamping supply rail against induced transients in 4–20 mA loop-powered pressure sensors. IC Role / Device Role / Timing Role: Reverse-biased protection element limiting rail voltage to 22 V during field-wiring surges. Use Value: Absorbs 40 W transient energy without degradation, preserving sensor IC integrity during 100 μs line faults. |
| Consumer Power Adapter Feedback | Medical Equipment Voltage Reference |
Use Scenario: Setting secondary-side feedback threshold in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Precision Zener defining optocoupler LED turn-on point to regulate 20 V output. Use Value: ±2 % tolerance reduces output variation to ±0.44 V, meeting USB PD v3.1 ripple compliance. |
Use Scenario: Providing stable bias for op-amp comparators in portable infusion pump battery monitoring. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 μA) voltage reference establishing 22 V overvoltage trip threshold. Use Value: Enables <1 μA standby current in safety-critical monitoring circuit while maintaining trip accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B22-Q | Identical electrical specs and AEC-Q101 qualification; differs only in tape-and-reel packaging (QX = 10,000 pcs/reel, Q = 3,000 pcs/reel) | No functional difference; suitable for identical automotive and industrial designs | Select BZX384-B22-QX for high-volume automated assembly requiring larger reels |
| MMSZ5247B-TP | 22 V ±5 % tolerance, 500 mW Ptot, SOD-123 package; higher power but looser tolerance and no AEC-Q101 rating | Acceptable for non-automotive consumer power supplies where cost and power margin outweigh precision needs | Choose only if AEC-Q101 is not required and 500 mW headroom justifies larger footprint |
Compared with BZX384-B22-QX, the BZX384-B22-Q offers identical performance in smaller reels for prototyping, while MMSZ5247B-TP trades automotive qualification and tight tolerance for higher power and lower unit cost in non-safety-critical applications.
Availability
BZX384-B22-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power adapters, and medical battery monitors requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage reference and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous Zener current for BZX384-B22-QX at 25 °C ambient?
The device supports up to 13.6 mA continuous Zener current at 25 °C ambient, calculated from Ptot = 300 mW and VZ = 22 V (I = P/V). Derating is required above 25 °C per the 415 K/W junction-to-ambient thermal resistance.
Does BZX384-B22-QX support wave soldering?
Yes - Nexperia provides dedicated wave soldering footprints for SOD323 (Fig. 13), specifying 2.75 mm transport direction length and 1.2 mm solder land width. Thermal profile must stay within JEDEC J-STD-020 limits to avoid package cracking.
How does the 15.4 mV/K temperature coefficient affect regulation accuracy over temperature?
At 22 V nominal, a 15.4 mV/K coefficient causes ~1.54 V drift over a 100 K range (−40 °C to +60 °C), but actual variation is mitigated by operating current and thermal coupling. Data sheet Fig. 7 confirms <±0.3 V deviation from 25 °C value across −40 °C to +125 °C at IZ = 5 mA.
Can BZX384-B22-QX replace older BZX384-B22 variants without layout changes?
Yes - BZX384-B22-QX uses the same SOD323 package outline (Fig. 11), identical pinning (cathode bar on Pin 1), and matches mechanical dimensions (2.7 × 1.6 × 1.1 mm). No PCB redesign is needed for drop-in replacement of legacy BZX384-B22 parts.
BZX384-B22-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B22-QX FAQ
1.How can I place an order for BZX384-B22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-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 BZX384-B22-QX reliable?
The price and inventory of BZX384-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 BZX384-B22-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B22-QX?
BZX384-B22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-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 BZX384-B22-QX?
For technical support, including BZX384-B22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B22-QX requirements.
6.How does Aetrix verify that BZX384-B22-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-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 BZX384-B22-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B22-QX?
All BZX384-B22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-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 BZX384-B22-QX part is unused and in its original packaging.
Return procedure for BZX384-B22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B22-QX Tags
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