My Inquiry
My Account
Nexperia USA Inc. BZX84W-C24-QX
- Part No.:
- BZX84W-C24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C24-QX.pdf
- Description:
- DIODE ZENER 24.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,548
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84W-C24-QX from Nexperia is a ±5 % tolerance Zener voltage regulator diode with 24 V nominal breakdown voltage, 250 Ω typical differential resistance at 5 mA, 20.4 mV/K temperature coefficient, and 275 mW total power dissipation in SOT323 (SC-70) package; used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZX84W-C24-QX datasheet, BZX84W-C24-QX pinout, BZX84W-C24-QX application, or BZX84W-C24-QX equivalent, this page delivers verified Zener parameters, AEC-Q101 qualification status, thermal resistance (455 K/W), reverse leakage (≤55 nA at 16.8 V), and automotive-grade reliability data without generic timing or interface assumptions.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 24 V regulation across load and line variations. Its ±5 % tolerance (C-series) and 20.4 mV/K temperature coefficient enable predictable drift behavior in ambient ranges from −55 °C to +150 °C.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 275 mW continuous dissipation and withstands non-repetitive 40 W surge pulses (tp = 100 µs). The SOT323 package supports high-frequency decoupling due to low 1.25 pF junction capacitance at 1 MHz and 0 V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 24 V (min 22.8 V, max 25.6 V at IZ = 5 mA) |
| Tolerance | ±5 % (C-series designation; tighter than standard 10 % Zeners) |
| Differential Resistance | 250 Ω max at IZ = 5 mA (low impedance ensures stable regulation under varying current) |
| Temperature Coefficient | +20.4 mV/K (positive drift enables predictable compensation in thermal designs) |
| Total Power Dissipation | 275 mW at Tamb = 25 °C (FR4 PCB, single-sided copper, standard footprint) |
| Junction-to-Ambient Thermal Resistance | 455 K/W (defines derating slope: ~0.6 mW/°C above 25 °C ambient) |
| Reverse Leakage Current | ≤55 nA at VR = 16.8 V (0.7 × VZnom; critical for low-power standby circuits) |
| Junction Capacitance | 1.25 pF at f = 1 MHz, VR = 0 V (enables effective high-frequency noise suppression) |
Pinout & Package
SOT323 (SC-70) leadless plastic surface-mount package with 3 terminals; compact 2.2 mm × 1.35 mm footprint, 0.65 mm pitch, and 0.1 mm maximum A1 height for automated assembly.
| 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 terminal; connected to higher-potential node; carries regulated output current during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Low junction capacitance | 1.25 pF enables effective RF filtering and EMI suppression in switching power supplies |
| High surge capability | Withstands 40 W non-repetitive reverse power pulses (tp = 100 µs) for transient protection |
| Stable temperature coefficient | +20.4 mV/K allows predictable voltage drift modeling across −55 °C to +150 °C operating range |
| Ultra-low leakage | ≤55 nA at 70 % of VZnom ensures minimal quiescent current draw in battery-powered systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping transients on 24 V CAN bus power lines in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector, clamping spikes above 26.5 V to prevent downstream IC damage. Use Value: AEC-Q101 qualification and 40 W surge rating ensure robustness against load-dump events per ISO 7637-2. | Use Scenario: Providing stable 24 V reference for 4–20 mA current-loop transmitter front-end circuitry. IC Role / Device Role / Timing Role: Precision voltage reference source with low tempco and low leakage for analog signal conditioning. Use Value: ±5 % tolerance and +20.4 mV/K coefficient allow accurate calibration across industrial temperature ranges (−40 °C to +85 °C). |
| Low-Power IoT Voltage Regulation | Switching PSU Feedback Network |
Use Scenario: Regulating auxiliary 24 V rail in battery-backed smart meter modules. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage for real-time clock and memory backup circuits. Use Value: 55 nA leakage at 16.8 V minimizes battery drain during extended sleep modes. | Use Scenario: Setting feedback threshold in secondary-side synchronous rectifier controllers. IC Role / Device Role / Timing Role: Zener element defining precise 24 V trigger point for optocoupler-based isolation feedback loops. Use Value: 250 Ω differential resistance ensures stable regulation despite current variation from controller bias currents. |
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 % tolerance (tighter), 23.5–24.5 V range vs. 22.8–25.6 V; identical package and thermal specs | Preferred where tighter initial accuracy required, e.g., calibration references | Select BZX84W-B24-Q when absolute voltage accuracy outweighs cost sensitivity |
| MMSZ5249B-TP | 24 V ±5 %, SOD-123 package, 500 mW Ptot, 300 Ω rdif, higher thermal resistance (~625 K/W) | Better power handling but larger footprint; less suitable for space-constrained automotive modules | Choose MMSZ5249B-TP only if board area permits and >275 mW dissipation is needed |
Compared with BZX84W-C24-QX, the BZX84W-B24-Q offers tighter tolerance at same form factor, while MMSZ5249B-TP trades miniaturization for higher power capacity-making the C24-QX optimal for AEC-Q101-compliant, space-limited 24 V regulation.
Availability
BZX84W-C24-QX is available at Aetrix Electronics and suitable for automotive power protection, industrial sensor reference, and low-power IoT voltage regulation requiring stable component supply, AEC-Q101 compliance, and SOT323 footprint compatibility.
Supply support for BZX84W-C24-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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for stable voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage before breakdown for BZX84W-C24-QX?
The BZX84W-C24-QX has a nominal Zener voltage of 24 V with a guaranteed range of 22.8 V to 25.6 V at 5 mA test current. Breakdown begins within this band; operation above 25.6 V risks exceeding absolute maximum ratings. The device is not rated for continuous reverse voltage beyond its specified VZ range.
Is BZX84W-C24-QX suitable for high-frequency noise suppression?
Yes-its 1.25 pF junction capacitance at 1 MHz and 0 V bias enables effective high-frequency bypassing. Combined with low differential resistance (250 Ω), it suppresses RF noise on 24 V rails in automotive and industrial switching power supplies without resonance issues common in higher-capacitance Zeners.
How does the "QX" suffix differ from standard "Q" in BZX84W-C24-QX?
The "QX" suffix denotes an enhanced quality grade per Nexperia's internal qualification protocol, adding extended reliability testing beyond standard AEC-Q101 requirements-including additional temperature cycling and humidity exposure. It retains identical electrical specs and packaging as the base BZX84W-C24-Q part.
Can BZX84W-C24-QX replace older BZX84-C24 variants in existing designs?
Yes-BZX84W-C24-QX maintains pin-compatible SOT323 packaging, identical electrical characteristics, and improved AEC-Q101 qualification versus legacy BZX84-C24 in SOT23. Layout adaptation is unnecessary, but verify thermal performance: the W-series uses optimized die attach for 275 mW rating versus 350 mW in some SOT23 versions, requiring minor derating in high-ambient environments.
BZX84W-C24-QX 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-QX FAQ
1.How can I place an order for BZX84W-C24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-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 BZX84W-C24-QX reliable?
The price and inventory of BZX84W-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 BZX84W-C24-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C24-QX?
BZX84W-C24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-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 BZX84W-C24-QX?
For technical support, including BZX84W-C24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C24-QX requirements.
6.How does Aetrix verify that BZX84W-C24-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-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 BZX84W-C24-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C24-QX?
All BZX84W-C24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-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 BZX84W-C24-QX part is unused and in its original packaging.
Return procedure for BZX84W-C24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C24-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
