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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX84W-C2V4-QX

Name: BZX84W-C2V4-QX
Brand: Nexperia USA Inc.
SKU: BZX84W-C2V4-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84W-C2V4-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-70, SOT-323

Datasheet:: BZX84W-C2V4-QX.pdf

Description:: DIODE ZENER 2.4V 275MW SOT323

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Product details

Overview

BZX84W-C2V4-Q from Nexperia is a ±5 % tolerance Zener diode in SOT323 (SC-70) package, rated for 2.4 V nominal regulation voltage at 5 mA, with 275 mW total power dissipation and qualified to AEC-Q101 for automotive use. It provides stable voltage reference in low-power biasing, overvoltage clamping, and signal-level regulation circuits.

For engineers reviewing the BZX84W-C2V4-Q datasheet, BZX84W-C2V4-Q pinout, BZX84W-C2V4-Q application, or BZX84W-C2V4-Q equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (600 Ω max at I_Z = 1 mA), reverse leakage (50 µA at V_R = 1 V), thermal resistance (455 K/W), and automotive qualification status.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 2.4 V at 5 mA test current, exhibiting a negative temperature coefficient of −1.6 mV/K. Its differential resistance remains ≤600 Ω at 1 mA and ≤100 Ω at 5 mA, supporting stable regulation under varying load conditions.

Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it delivers 275 mW steady-state power dissipation and withstands non-repetitive peak reverse power up to 40 W (100 µs pulse). The device features a not-connected (n.c.) terminal (Pin 2), enabling layout flexibility while maintaining anode–cathode isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.20 V to 2.60 V at I_Z = 5 mA - defines regulation band for precision low-voltage reference
Tolerance	±5 % - specifies maximum deviation from nominal 2.4 V, critical for margin-sensitive bias networks
Differential Resistance (r_diff)	≤600 Ω at I_Z = 1 mA - determines output impedance and load regulation error
Reverse Leakage (I_R)	50 µA at V_R = 1 V - limits standby current in high-impedance clamp or reference paths
Total Power Dissipation (P_tot)	275 mW on FR4 PCB - sets maximum continuous DC or low-duty-cycle pulsed power handling
Junction Temperature (T_j)	−55 °C to +150 °C - enables operation in under-hood automotive environments
Thermal Resistance (R_th(j-a))	455 K/W - quantifies self-heating rise per watt, essential for thermal derating calculations

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.7 mm × 1.25 mm footprint, 0.95 mm height, leadless construction with three terminals.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener configuration
2	Not Connected (n.c.)	Electrically isolated; no internal bond wire; allows routing clearance or mechanical anchoring
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node for Zener operation

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness
Low-profile SOT323 package	Enables high-density PCB layouts in space-constrained modules such as ADAS sensors and body control units
2.4 V Zener voltage with ±5 % tolerance	Supports cost-optimized designs where tighter tolerance is unnecessary, e.g., non-critical biasing
40 W non-repetitive surge capability	Provides transient overvoltage protection against ESD or load-dump events in 12 V systems

Applications

Automotive Sensor Biasing

USB Port Overvoltage Clamp

Use Scenario: Providing stable 2.4 V reference for analog front-end circuitry in tire pressure monitoring sensors (TPMS).

IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage reference, regulating bias current for op-amp input stages and ADC reference dividers.

Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient due to AEC-Q101 qualification and known −1.6 mV/K temperature coefficient.

Use Scenario: Clamping transient voltages on USB VBUS line during hot-plug or ESD events.

IC Role / Device Role / Timing Role: Acts as low-energy shunt protector, diverting surges above 2.4 V to ground before reaching downstream USB controller ICs.

Use Value: Limits clamping voltage to ≤2.6 V (max V_Z) with 50 µA leakage at 1 V, minimizing standby power loss and ensuring compatibility with 3.3 V logic thresholds.

Industrial PLC Input Protection

Low-Power MCU Reset Circuit

Use Scenario: Protecting digital input channels of programmable logic controllers against field-wiring transients.

IC Role / Device Role / Timing Role: Zener diode placed between input signal and ground to clamp induced spikes without loading the source.

Use Value: Withstands 40 W non-repetitive pulses (100 µs) and operates reliably from −55 °C to +150 °C, meeting industrial environmental requirements.

Use Scenario: Generating a clean reset threshold for 3.3 V microcontrollers using resistor-divider + Zener feedback.

IC Role / Device Role / Timing Role: Provides precise 2.4 V trigger point for external reset supervisor ICs or comparator-based reset generators.

Use Value: Differential resistance ≤600 Ω ensures minimal voltage droop under 100 µA load, preserving reset accuracy across supply variations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84W-B2V4-Q	±2 % tolerance (2.35 V–2.45 V), lower differential resistance (≤100 Ω at 5 mA)	Required where tighter regulation stability is needed, e.g., precision reference buffers	Select when V_Z accuracy > ±5 % is mandatory and cost premium is acceptable
MMSZ4678T1G	2.4 V ±5 %, SOD-123 package, 500 mW P_tot, higher thermal resistance (~300 K/W on FR4)	Suitable for higher-power, less space-constrained designs; not AEC-Q101 qualified	Choose for industrial non-automotive use where board area is less critical and higher power margin is required

Compared with BZX84W-C2V4-Q, the BZX84W-B2V4-Q offers tighter voltage control but identical package and automotive qualification, while MMSZ4678T1G trades AEC-Q101 compliance and compactness for higher power rating and larger footprint.

Availability

BZX84W-C2V4-Q is available at Aetrix Electronics and suitable for automotive sensor modules, USB interface protection circuits, and industrial PLC input conditioning requiring stable component supply and long-term lifecycle support.

Supply support for BZX84W-C2V4-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 focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units.

FAQ

What is the maximum continuous forward current for BZX84W-C2V4-Q?

The device is not rated for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but typical operation occurs in reverse breakdown. Forward voltage is specified at 10 mA (≤0.9 V), and sustained forward bias risks thermal overstress due to low power rating.

Does BZX84W-C2V4-Q have a built-in capacitor or ESD protection structure?

No-this is a standard junction Zener diode without integrated capacitance or ESD-specific structures. Its measured diode capacitance is 6 pF at 1 MHz and 0 V bias, and ESD robustness stems from AEC-Q101 qualification (HBM ≥2 kV), not dedicated on-chip protection elements.

Can BZX84W-C2V4-Q be used in parallel for higher power handling?

No-Zener diodes exhibit manufacturing spread in V_Z and dynamic resistance; paralleling causes current hogging and thermal runaway. For higher power, use a single higher-rated Zener (e.g., BZX84W-C2V4-Q's 275 mW limit must not be exceeded by derating per ambient temperature).

How does the n.c. pin (Pin 2) affect PCB layout or thermal performance?

Pin 2 is electrically isolated with no internal connection; it may be left unconnected or used as a mechanical anchor. It does not contribute to thermal conduction-heat flows primarily through Pins 1 and 3 to the PCB copper, so thermal design should follow SOT323 reflow footprint guidelines (Fig. 9) without relying on Pin 2 for heatsinking.

BZX84W-C2V4-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):: 2.4 V

Tolerance:: ±8.33%

Power - Max:: 275 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 µA @ 1 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-C2V4-QX FAQ

1.How can I place an order for BZX84W-C2V4-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84W-C2V4-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-C2V4-QX reliable?

The price and inventory of BZX84W-C2V4-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-C2V4-QX is usually 5 days.

3.What payment methods are accepted for BZX84W-C2V4-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C2V4-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84W-C2V4-QX?

BZX84W-C2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84W-C2V4-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-C2V4-QX?

For technical support, including BZX84W-C2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C2V4-QX requirements.

6.How does Aetrix verify that BZX84W-C2V4-QX is sourced from the original manufacturer or authorized distributors?

All BZX84W-C2V4-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-C2V4-QX meets industry standards.

7.What is the process for return or replacement of BZX84W-C2V4-QX?

All BZX84W-C2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C2V4-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-C2V4-QX part is unused and in its original packaging.

Return procedure for BZX84W-C2V4-QX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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