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Nexperia USA Inc. BZX384-C24-QX
- Part No.:
- BZX384-C24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C24-QX.pdf
- Description:
- DIODE ZENER 24.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,608
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Product details
Overview
BZX384-C24-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode with 24 V nominal breakdown voltage, 250 mA maximum forward current, and 300 mW total power dissipation in SOD323 (SC-76) package. It operates across –65 °C to +150 °C ambient range and is AEC-Q101 qualified for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-C24-Q datasheet, BZX384-C24-Q pinout, BZX384-C24-Q application, or BZX384-C24-Q equivalent, key selection criteria include its 24 V ±5 % Zener voltage at 5 mA, 55 μA reverse current at 19.2 V, 16.8 mV/K temperature coefficient, and non-repetitive peak reverse current of 1.25 A under 100 μs surge conditions.
Technical Context
This Zener diode functions as a precision shunt voltage reference in reverse-biased mode, maintaining stable 24 V regulation across load and line variations. Its differential resistance of 250 Ω at 5 mA ensures low dynamic impedance for noise-sensitive analog rails.
Designed for automotive-grade reliability, it delivers 150 °C junction temperature capability and meets AEC-Q101 stress test requirements including high-temperature reverse bias, temperature cycling, and humidity testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V to 25.6 V at IZ = 5 mA - defines regulated output voltage window under standard test conditions |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines output voltage stability against current variation |
| Reverse Current (IR) | 55 μA max at VR = 19.2 V - sets leakage threshold before breakdown onset |
| Temperature Coefficient (SZ) | +16.8 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius rise |
| Non-repetitive Peak Reverse Current (IZSM) | 1.25 A at tp = 100 μs - supports transient overvoltage clamping without failure |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - limits continuous thermal loading in compact layouts |
| Junction Temperature (Tj) | 150 °C max - enables operation in under-hood automotive environments |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.35 mm × 1.80 mm body size, 0.45 mm lead pitch, and cathode-marked top-side bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, HTRB, and HTGB stress tests |
| ±5 % Zener voltage tolerance | Supports cost-sensitive applications where tighter tolerances are unnecessary, e.g., bulk supply rail clamping |
| Low thermal resistance (Rth(j-sp) = 110 K/W) | Enables efficient heat transfer from junction to solder point on standard FR4 PCB |
| Non-repetitive peak power handling (40 W) | Clamps ESD and load-dump transients up to 40 W for 100 μs without degradation |
| Small footprint (SOD323) | Reduces board area by >50 % vs. DO-35, enabling high-density automotive control module designs |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Regulating 24 V supply rail for microcontroller I/O protection circuitry in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 24 V reference for TVS-triggered overvoltage detection. Use Value: Maintains regulation within ±5 % across –40 °C to +125 °C ambient, ensuring consistent trigger thresholds despite thermal drift. |
Use Scenario: Biasing precision op-amp input stages in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Low-noise Zener reference establishing fixed common-mode voltage for differential signal amplification. Use Value: 250 Ω differential resistance minimizes gain error induced by source impedance mismatch in high-impedance sensor interfaces. |
| Consumer Power Adapter Feedback | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side voltage reference in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener clamp stabilizing optocoupler LED current to maintain tight output voltage regulation. Use Value: 300 mW power rating supports continuous operation at full-load while maintaining <1 % output deviation over line/load changes. |
Use Scenario: Overvoltage protection element in DSL line interface ICs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt device diverting transient energy before downstream PHY damage occurs. Use Value: 1.25 A non-repetitive peak current rating clamps 10/1000 μs surges up to 31.25 V without parametric shift. |
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-B24-Q | ±2 % tolerance (23.5 V–24.5 V), 200 Ω rdif, 0.05 mV/K lower tempco | Higher precision required in feedback loops with tight output tolerance (±1 %) | Select when improved regulation accuracy justifies higher unit cost and tighter inventory control |
| MMSZ5245B-TP | ±5 % tolerance (22.8 V–25.6 V), 250 Ω rdif, 350 mW Ptot, SOD-123 package | Larger footprint but higher power margin for intermittent surge duty cycles | Choose when board layout allows larger package and thermal margin exceeds 300 mW derating needs |
Compared with BZX384-B24-Q, this part trades regulation accuracy for cost and automotive qualification; compared with MMSZ5245B-TP, it offers smaller footprint and AEC-Q101 compliance at identical voltage tolerance, making it optimal for space-constrained automotive modules.
Availability
BZX384-C24-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapters, and telecom line protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-C24-Q 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, miniaturization, and automotive-grade robustness.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for voltage reference, overvoltage protection, and biasing in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage (VR) this diode can withstand before breakdown?
The BZX384-C24-Q exhibits a reverse current of 55 μA at 19.2 V, indicating onset of measurable conduction below nominal Zener voltage. Full breakdown occurs between 22.8 V and 25.6 V at 5 mA test current, per datasheet Table 8. Operation above 25.6 V risks exceeding absolute maximum ratings and must be avoided in steady-state design.
Can this Zener diode be used in parallel for higher power dissipation?
No - Zener diodes exhibit manufacturing spread in breakdown voltage, causing current hogging when paralleled. Even with matched units, thermal runaway occurs due to positive temperature coefficient above ~5 V. For higher power, use a single higher-rated device or external series resistor with forced-air cooling.
How does the 16.8 mV/K temperature coefficient affect regulation accuracy over temperature?
At 24 V nominal, a +16.8 mV/K coefficient causes ~1.0 V increase from –40 °C to +125 °C (165 K delta), resulting in ~4.2 % total drift. This is acceptable for non-precision clamping but requires compensation in feedback references; automotive designs typically accept this drift within system-level error budgets.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies a reflow footprint (Fig. 12) with 0.5 mm pad width, 1.65 mm pad length, and 0.6 mm solder mask opening. The device supports JEDEC J-STD-020D peak temperatures up to 260 °C for ≤30 seconds, matching standard lead-free reflow profiles used in automotive PCB assembly.
BZX384-C24-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):
- 24.2 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.94 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-C24-QX FAQ
1.How can I place an order for BZX384-C24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C24-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-C24-QX reliable?
The price and inventory of BZX384-C24-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-C24-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C24-QX?
BZX384-C24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C24-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-C24-QX?
For technical support, including BZX384-C24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C24-QX requirements.
6.How does Aetrix verify that BZX384-C24-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C24-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-C24-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C24-QX?
All BZX384-C24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C24-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-C24-QX part is unused and in its original packaging.
Return procedure for BZX384-C24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C24-QX Tags
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MM5Z5V1ST1G
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