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Nexperia USA Inc. BZX84W-C24-QF
- Part No.:
- BZX84W-C24-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C24-QF.pdf
- Description:
- DIODE ZENER 24.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,801
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Product details
Overview
BZX84W-C24-QF from Nexperia is a ±5% tolerance Zener voltage regulator diode with 24 V nominal breakdown voltage, 250 Ω typical differential resistance at 5 mA, and 20.4 mV/K temperature coefficient, housed in an AEC-Q101-qualified SOT323 (SC-70) package for automotive power rail stabilization.
For engineers reviewing the BZX84W-C24-QF datasheet, BZX84W-C24-QF pinout, BZX84W-C24-QF application, or BZX84W-C24-QF equivalent, this part supports precision voltage reference, overvoltage clamping, and low-power regulation in space-constrained automotive ECUs and industrial sensor interfaces where thermal stability and automotive qualification are required.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 24 V nominal Zener voltage is specified at IZ = 5 mA with ±5% tolerance, and it exhibits a positive temperature coefficient of +20.4 mV/K, indicating increasing breakdown voltage with junction temperature rise.
The device delivers 275 mW total power dissipation on FR4 PCB with single-sided copper, and supports non-repetitive surge capability up to 40 W for 100 µs pulses. Its 1.25 pF capacitance at 1 MHz and 0 V bias enables use in high-frequency noise suppression without signal distortion.
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 range for reference or clamp circuits |
| Differential Resistance (rdif) | 250 Ω max at IZ = 5 mA - determines voltage regulation stiffness under load variation |
| Temperature Coefficient (SZ) | +20.4 mV/K - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W - defines thermal bottleneck limiting sustained power in still air |
| Reverse Current (IR) | 50 nA max at VR = 0.7 × VZnom - ensures minimal leakage below regulation threshold |
| Diode Capacitance (Cd) | 1.25 pF at f = 1 MHz, VR = 0 V - enables RF filtering without loading high-speed signal paths |
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 reflow soldering with defined land pattern per Figure 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection; must remain unconnected in layout |
| 3 | Cathode (K) | Reverse-bias voltage input and regulated output node; connected to higher-potential rail in shunt regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| ±5% Zener voltage tolerance | Enables cost-effective regulation where tighter tolerance is not required, balancing accuracy and BOM cost |
| Low 1.25 pF junction capacitance | Minimizes signal coupling and phase shift in high-frequency feedback loops and RF bypass applications |
| 275 mW power rating on standard FR4 | Supports robust operation in compact PCB layouts without thermal vias or heatsinking |
| Three-terminal SOT323 package with n.c. pin | Provides mechanical stability and alignment during automated placement while isolating unused terminal |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 24 V supply rails feeding microcontroller I/O buffers and CAN transceiver bias networks in door module ECUs. IC Role / Device Role / Timing Role: Shunt Zener regulator maintaining reference voltage for analog comparators and level-shifters under load transients. Use Value: Prevents brown-out resets during load dump events by clamping rail excursions above 25.6 V with <50 nA leakage below regulation threshold. | Use Scenario: Providing stable 24 V reference for 4–20 mA loop-powered pressure transmitters operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision voltage reference source for DAC output scaling and ADC reference buffer circuits. Use Value: Delivers ±5% regulation accuracy and +20.4 mV/K TC tracking across −40 °C to +125 °C ambient, enabling <0.5% full-scale error over temperature. |
| Automotive Infotainment Power Sequencing | High-Frequency EMI Filtering |
Use Scenario: Enabling controlled power-up sequencing of display backlight drivers and audio amplifiers via voltage-dependent enable thresholds. IC Role / Device Role / Timing Role: Zener-clamped voltage detector generating reset or enable signals when main 24 V rail reaches regulation threshold. Use Value: Achieves deterministic turn-on at 22.8 V minimum with 250 Ω dynamic impedance, ensuring repeatable timing across production lots. | Use Scenario: Suppressing high-frequency switching noise on 24 V DC-DC converter outputs feeding sensitive RF receivers. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp absorbing GHz-range transients without resonant peaking. Use Value: 1.25 pF capacitance minimizes impedance discontinuity at 1 GHz, reducing conducted EMI by >15 dB compared to higher-C alternatives. |
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-Q | ±2% Zener tolerance (23.5–24.5 V), lower rdif (250 Ω max vs. same), identical package and thermal specs | Higher precision needed for reference-grade circuits; tighter TC spread (±20.4 mV/K vs. ±20.4 mV/K typical) | Select when absolute voltage accuracy outweighs cost sensitivity; requires tighter BOM control |
| MMSZ5249B-TP | 24 V nominal, ±5%, SOD-123 package, 500 mW Ptot, 100 Ω rdif, but not AEC-Q101 qualified | Higher power handling and lower impedance, but unsuitable for automotive due to missing qualification | Use only in industrial or consumer systems where AEC-Q101 is not mandated |
Compared with BZX84W-C24-QF, BZX84W-B24-Q offers tighter voltage control at equal thermal performance, while MMSZ5249B-TP trades automotive qualification for higher power and lower impedance-making the C24-QF optimal for cost-sensitive, space-constrained automotive regulation where ±5% tolerance is acceptable.
Availability
BZX84W-C24-QF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, infotainment power sequencing, and high-frequency EMI filtering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84W-C24-QF 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and clamping in automotive power domains where reliability, thermal stability, and small-footprint integration are critical.
FAQ
What is the maximum continuous reverse current the BZX84W-C24-QF can sustain at 25 °C?
The BZX84W-C24-QF is rated for 275 mW total power dissipation at 25 °C ambient on a standard FR4 PCB. At its 24 V nominal Zener voltage, this corresponds to a maximum continuous reverse current of 11.5 mA (275 mW ÷ 24 V). Exceeding this current risks thermal runaway unless board-level cooling is enhanced.
Is the n.c. pin on the SOT323 package electrically isolated or internally tied to another terminal?
Pin 2 is explicitly designated "not connected" in Nexperia's official pinning documentation and has no internal bond wire or die connection. It is fully electrically isolated and must remain unconnected in PCB layout-soldering or routing to this pin may cause mechanical stress or unintended parasitic coupling.
How does the +20.4 mV/K temperature coefficient affect regulation accuracy over automotive temperature range?
Over the −40 °C to +125 °C junction range (ΔT = 165 K), the +20.4 mV/K coefficient causes a total Zener voltage shift of +3.37 V (20.4 mV/K × 165 K). Combined with ±5% initial tolerance (±1.2 V), worst-case regulation spans 22.8 V to 28.97 V-requiring system-level margining in precision reference designs.
Can BZX84W-C24-QF be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, slight VZ mismatches cause current hogging. Parallel operation is not recommended; instead, use a single higher-rated device like PZM24NB or implement active regulation for >275 mW needs.
BZX84W-C24-QF 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):
- 24.2 V
- Tolerance:
- ±5.79%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.94 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-C24-QF FAQ
1.How can I place an order for BZX84W-C24-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C24-QF 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-C24-QF reliable?
The price and inventory of BZX84W-C24-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C24-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C24-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C24-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C24-QF?
BZX84W-C24-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C24-QF 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-C24-QF?
For technical support, including BZX84W-C24-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C24-QF requirements.
6.How does Aetrix verify that BZX84W-C24-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C24-QF 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-C24-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C24-QF?
All BZX84W-C24-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C24-QF, 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-C24-QF part is unused and in its original packaging.
Return procedure for BZX84W-C24-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C24-QF Tags
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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
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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