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Nexperia USA Inc. BZX84W-C24X
- Part No.:
- BZX84W-C24X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C24X.pdf
- Description:
- DIODE ZENER 24V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,307
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Product details
Overview
BZX84W-C24X from Nexperia is a ±5 % tolerance Zener voltage regulator diode with a nominal 24 V breakdown voltage, 250 Ω differential resistance at 5 mA, 20.4 mV/K temperature coefficient, 55 pF capacitance at 1 MHz, and 275 mW total power dissipation in SOT323 (SC-70) package. It provides stable reference voltage for low-power analog circuits and overvoltage protection in sensor signal conditioning paths.
For engineers reviewing the BZX84W-C24X datasheet, BZX84W-C24X pinout, BZX84W-C24X application, or BZX84W-C24X equivalent, this page delivers verified electrical parameters, thermal behavior, package dimensions, and real-world use cases for precision voltage regulation in space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 24 V reference across load variations, with a typical differential resistance of 250 Ω at 5 mA test current. Its positive temperature coefficient of +20.4 mV/K ensures predictable drift in ambient temperature shifts from 25 °C to 150 °C.
The device exhibits 55 pF junction capacitance at 0 V reverse bias and 1 MHz, enabling effective noise suppression in high-frequency feedback loops. It supports non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses, making it suitable for transient voltage clamping in low-energy surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V to 25.6 V at IZ = 5 mA - defines operating range for precision voltage reference |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines output impedance and regulation sensitivity |
| Temperature Coefficient (SZ) | +20.4 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Junction Capacitance (Cd) | 55 pF at f = 1 MHz, VR = 0 V - impacts high-frequency stability in filtering and clamping |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets continuous thermal limit under standard mounting |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss during forward-bias operation |
| Reverse Current (IR) | 50 nA max at VR = 16.8 V - indicates leakage level near rated Zener voltage |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, and 0.65 mm pitch; optimized for automated reflow assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower potential side in Zener regulation |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection |
| 3 | Cathode (K) | Reverse-bias voltage input; connected to higher potential side for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical reference applications without trimming |
| 275 mW power rating on FR4 PCB | Supports continuous regulation in compact consumer and industrial control boards |
| 55 pF junction capacitance | Minimizes phase shift in feedback networks for stable op-amp reference circuits |
| +20.4 mV/K temperature coefficient | Allows predictable compensation in temperature-sensitive analog front-ends |
| SOT323 package with n.c. pin | Reduces parasitic coupling and simplifies layout versus 2-pin alternatives |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter ICs in process automation transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing 24 V rail for DAC and current-sense amplifier biasing. Use Value: Maintains <±1 % output accuracy over −40 °C to +85 °C ambient due to known temperature coefficient and low leakage. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector limiting voltage to 25.6 V peak before downstream LDO damage. Use Value: 55 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 data lines. |
| Low-Power IoT Node Voltage Reference | Automotive Body Control Module (Non-Automotive Qualified) |
Use Scenario: Supplying stable bias to ultra-low-power ADCs in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Precision Zener element setting reference for 12-bit SAR ADC conversion threshold. Use Value: 50 nA reverse leakage at 16.8 V ensures <100 nA standby current draw, extending 10-year battery life. | Use Scenario: Providing regulated 24 V supply for microcontroller reset circuitry in aftermarket lighting controllers. IC Role / Device Role / Timing Role: Standby-mode voltage supervisor ensuring clean POR at system startup. Use Value: 275 mW rating accommodates brief 200 mA inrush without thermal derating on standard FR4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B24 | ±2 % tolerance (23.5–24.5 V), lower rdif (250 Ω typ), identical package and thermal specs | Higher precision needed for calibration-grade references; tighter voltage binning required | Select when absolute voltage accuracy outweighs cost sensitivity |
| MMBZ5245BS | ±5 % tolerance (23.75–26.25 V), 225 mW Ptot, SOT-23 package, 30 pF Cd | Lower capacitance but reduced power handling; incompatible pinout (anode/cathode swapped) | Choose only if board redesign allows SOT-23 footprint and lower capacitance is critical |
Compared with BZX84W-C24X, BZX84W-B24 offers tighter voltage control at same thermal performance, while MMBZ5245BS trades power margin and pin compatibility for reduced parasitic capacitance-making the C24X optimal for cost-sensitive, space-constrained 24 V reference designs requiring proven FR4 thermal reliability.
Availability
BZX84W-C24X is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and low-power IoT node voltage reference requiring stable component supply across production volumes and extended lifecycle planning.
Supply support for BZX84W-C24X 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 robustness for mass-market electronics.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for stable voltage regulation and overvoltage protection in cost-sensitive, high-volume consumer, industrial, and computing applications using ultra-small SMD packages.
FAQ
What is the maximum reverse current specification for BZX84W-C24X at its rated Zener voltage?
The maximum reverse current (IR) is 50 nA at VR = 16.8 V (0.7 × VZnom), measured at Tj = 25 °C with pulse conditions of tp ≤ 300 µs and duty cycle δ ≤ 0.02. This low leakage ensures minimal quiescent power loss in always-on reference circuits.
Can BZX84W-C24X be used in automotive applications?
No-BZX84W-C24X is explicitly designated as non-automotive qualified per Nexperia's revision history. It lacks AEC-Q200 qualification, automotive-grade screening, and guaranteed operation over −40 °C to +125 °C extended temperature range. Automotive designs require Nexperia's -Q qualified variants.
How does the n.c. pin (Pin 2) affect PCB layout and thermal performance?
Pin 2 is electrically unconnected and must remain unbonded on the PCB. It does not contribute to thermal conduction; junction-to-ambient thermal resistance (455 K/W) is defined solely by Pins 1 and 3 mounted on standard FR4. Layout must avoid solder bridging or copper pour contact to prevent unintended parasitic coupling.
What is the non-repetitive peak reverse power dissipation capability of this Zener diode?
BZX84W-C24X supports up to 40 W non-repetitive peak reverse power dissipation for 100 µs square-wave pulses at Tamb = 25 °C, per IEC 60134 limiting values. This enables transient clamping of ESD or inductive kick events without permanent degradation when properly heat-sinked via PCB copper.
BZX84W-C24X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C24X FAQ
1.How can I place an order for BZX84W-C24X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C24X 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-C24X reliable?
The price and inventory of BZX84W-C24X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C24X is usually 5 days.
3.What payment methods are accepted for BZX84W-C24X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C24X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C24X?
BZX84W-C24X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C24X 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-C24X?
For technical support, including BZX84W-C24X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C24X requirements.
6.How does Aetrix verify that BZX84W-C24X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C24X 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-C24X meets industry standards.
7.What is the process for return or replacement of BZX84W-C24X?
All BZX84W-C24X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C24X, 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-C24X part is unused and in its original packaging.
Return procedure for BZX84W-C24X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C24X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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