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Nexperia USA Inc. BZX384-A22-QX
- Part No.:
- BZX384-A22-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A22-QX.pdf
- Description:
- DIODE ZENER 22V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,783
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Product details
Overview
BZX384-A22-QX from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, with nominal breakdown voltage 22 V at 5 mA, 250 mA maximum forward current, and 300 mW total power dissipation. It delivers stable reference voltage for low-power biasing and overvoltage protection in automotive control modules.
For engineers reviewing the BZX384-A22-QX datasheet, BZX384-A22-QX pinout, BZX384-A22-QX application, or BZX384-A22-QX equivalent, key selection criteria include Zener voltage tolerance (±1 %), thermal resistance (110 K/W junction-to-solder point), non-repetitive peak reverse power (40 W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates in reverse-biased Zener breakdown mode to maintain precise DC voltage regulation under varying load and temperature conditions. Its differential resistance of 250 Ω at IZ = 5 mA ensures minimal output voltage drift across operating current range.
Designed for surface-mount use on FR4 PCBs with standard tin-plated copper, it achieves 150 °C maximum junction temperature and supports surge handling up to 100 μs pulses at 40 W, meeting automotive transient immunity requirements per ISO 7637-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.78 V to 22.22 V at IZ = 5 mA - tight ±1 % tolerance enables accurate voltage reference without trimming |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - low impedance stabilizes output against load variations |
| Reverse Current (IR) | ≤0.05 μA at VR = 17.6 V - negligible leakage preserves battery-backed circuit integrity |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - handles automotive load-dump transients without failure |
| Junction-to-Solder Point Rth | 110 K/W - enables reliable thermal coupling to PCB copper for sustained 300 mW operation |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units and body electronics |
| Package | SOD323 (SC-76) - 2.3 mm × 1.35 mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with cathode-marked end and 2-terminal configuration. Marking bar indicates cathode; standard footprint per Figure 12 in datasheet Rev. 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marking aligns with PCB silkscreen for automated assembly |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables single-step calibration in precision reference circuits without external trimming components |
| 40 W non-repetitive peak power rating | Withstands ISO 7637-2 Pulse 5a load-dump surges in 12 V automotive systems |
| AEC-Q101 qualification | Validated for extended temperature cycling (-65 °C to +150 °C) and humidity exposure per automotive standards |
| 110 K/W junction-to-solder-point thermal resistance | Allows full 300 mW power dissipation on standard FR4 PCB without heatsinking |
| Low 0.05 μA reverse leakage at 80 % VZ | Minimizes standby current in always-on vehicle subsystems such as CAN wake-up receivers |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 22 V reference for analog front-end comparators monitoring throttle position sensor output. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precision bias point for op-amp input stages. Use Value: ±1 % tolerance ensures <±0.22 V reference error across temperature, eliminating need for post-calibration trimming. |
Use Scenario: Regulates supply to 24 V industrial pressure transducer interface circuitry in PLC I/O modules. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining constant excitation voltage for bridge sensors. Use Value: 250 Ω differential resistance limits output deviation to <±2.5 mV under ±10 mA load variation. |
| Consumer Audio Power Supply Clamp | Medical Infusion Pump Overvoltage Protection |
Use Scenario: Clamps 24 V DC-DC converter output during transient overvoltage events in portable speaker amplifiers. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing short-duration energy spikes before downstream regulators. Use Value: 40 W peak power rating handles 100 μs surges exceeding 10× normal operating voltage without degradation. |
Use Scenario: Protects microcontroller ADC input from accidental 36 V connection in battery-powered infusion pump motor driver stage. IC Role / Device Role / Timing Role: Precision crowbar element triggering shutdown when supply exceeds 22.22 V threshold. Use Value: 0.05 μA leakage at 17.6 V prevents false triggering while ensuring fast response to overvoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B22-Q | ±2 % tolerance (21.6 V–22.4 V), higher 300 μA IR at VR = 17.6 V | Acceptable where tighter regulation not required; higher leakage may affect ultra-low-power sleep modes | Select for cost-sensitive non-automotive applications with relaxed accuracy needs |
| MMSZ5247B-TP | ±5 % tolerance (20.9 V–23.1 V), 500 mW Ptot, no AEC-Q101 qualification | Higher power but unqualified for automotive; larger SOD-123 package increases board area | Choose only for industrial prototypes requiring higher continuous dissipation without automotive compliance |
Compared with BZX384-B22-Q and MMSZ5247B-TP, the BZX384-A22-QX uniquely combines ±1 % tolerance, AEC-Q101 qualification, and SOD323 footprint-making it the sole option for production automotive designs demanding both precision and regulatory compliance in space-constrained layouts.
Availability
BZX384-A22-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, consumer audio power clamping, and medical infusion pump overvoltage protection requiring stable component supply across long production lifecycles.
Supply support for BZX384-A22-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX384-Q series targets automotive and industrial voltage regulation, engineered for AEC-Q101 compliance, low-profile SMD integration, and stable Zener performance across extended temperature ranges.
FAQ
What is the maximum continuous power dissipation for BZX384-A22-QX at 70 °C ambient?
At Tamb = 70 °C, derated power dissipation is 210 mW, calculated using Rth(j-a) = 415 K/W and Tj(max) = 150 °C. This ensures safe operation without thermal runaway on standard FR4 PCBs with single-sided copper.
Does BZX384-A22-QX support reflow soldering per JEDEC J-STD-020?
Yes - the SOD323 package is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for ≤30 seconds. Recommended footprint matches Figure 12 in the datasheet (0.6 mm pad width, 1.65 mm pad length).
How does the temperature coefficient affect regulation accuracy over -40 °C to +125 °C?
At 22 V nominal, the temperature coefficient is +15.4 mV/K (typical). Over -40 °C to +125 °C, this introduces ±2.55 V drift, mitigated by using the diode in constant-current bias mode and selecting adjacent types (e.g., BZX384-A20-Q or BZX384-A24-Q) for tighter system-level drift budgets.
Can BZX384-A22-QX replace older BZX384-A22 variants without layout changes?
Yes - BZX384-A22-QX maintains identical SOD323 mechanical dimensions, pinning, and soldering footprint as legacy BZX384-A22 parts. The "-QX" suffix denotes enhanced AEC-Q101 qualification and updated traceability, with no electrical or physical redesign.
BZX384-A22-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:
- ±1%
- 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-A22-QX FAQ
1.How can I place an order for BZX384-A22-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A22-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-A22-QX reliable?
The price and inventory of BZX384-A22-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-A22-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A22-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A22-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A22-QX?
BZX384-A22-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A22-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-A22-QX?
For technical support, including BZX384-A22-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A22-QX requirements.
6.How does Aetrix verify that BZX384-A22-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A22-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-A22-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A22-QX?
All BZX384-A22-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A22-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-A22-QX part is unused and in its original packaging.
Return procedure for BZX384-A22-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A22-QX Tags
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MM5Z5V1ST1G
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