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

Nexperia USA Inc. BZX84W-C10X

Name: BZX84W-C10X
Brand: Nexperia USA Inc.
SKU: BZX84W-C10X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84W-C10X

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-70, SOT-323

Datasheet:: BZX84W-C10X.pdf

Description:: DIODE ZENER 10V 275MW SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:9,741

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Product details

Overview

BZX84W-C10X from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 10 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 200 nA reverse leakage at 7 V. It serves as a precision reference or low-power voltage clamp in signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZX84W-C10X datasheet, BZX84W-C10X pinout, BZX84W-C10X application, or BZX84W-C10X equivalent, key selection criteria include Zener voltage tolerance, differential resistance (150 Ω at 5 mA), thermal coefficient (+6.4 mV/K), junction temperature limit (150 °C), and SOT323 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its 10 V nominal Zener voltage is specified at I_Z = 5 mA with ±5% tolerance, and exhibits a positive temperature coefficient of +6.4 mV/K over 25–150 °C.

The device features low differential resistance (150 Ω max at 5 mA), 90 pF capacitance at 1 MHz and 0 V bias, and supports non-repetitive surge currents up to 1.0 A (100 µs pulse). It is mounted on FR4 PCB with single-sided copper and standard SOT323 footprint per JEDEC MO-203AA.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10 V nominal at I_Z = 5 mA; ±5% tolerance ensures predictable clamping within 9.4–10.6 V range.
Differential Resistance (r_dif)	150 Ω maximum at I_Z = 5 mA; determines regulation stiffness and output impedance in feedback paths.
Reverse Leakage (I_R)	200 nA at V_R = 7 V; enables low-quiescent-current biasing in precision analog circuits.
Power Dissipation (P_tot)	275 mW at T_amb = 25 °C on FR4 PCB; defines maximum continuous DC power handling before thermal derating.
Thermal Resistance (R_th(j-a))	455 K/W in free air; dictates junction-to-ambient temperature rise under load, critical for reliability at elevated ambient.
Temperature Coefficient (S_Z)	+6.4 mV/K at I_Z = 5 mA; quantifies voltage drift per degree Celsius, essential for temperature-stable references.
Forward Voltage (V_F)	0.9 V maximum at I_F = 10 mA; relevant for polarity-check circuits or dual-use forward conduction paths.

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package with 3 leads, 1.3 mm × 1.8 mm body size, 0.65 mm lead pitch, and tin-plated terminations compatible with standard reflow soldering profiles.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node in reverse-bias configuration; must be held at voltage ≤ cathode minus V_Z for regulation.
2	Not Connected (n.c.)	Internally unconnected terminal; must remain floating-no PCB trace or solder mask should bridge this pad.
3	Cathode (K)	Connected to higher-potential node; carries reverse current during Zener operation and defines regulated output reference point.

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables cost-effective voltage referencing where tight regulation is not required, such as overvoltage protection thresholds.
Low 90 pF junction capacitance	Minimizes signal distortion and phase shift in high-frequency applications like RF detector biasing or fast transient clamping.
150 °C maximum junction temperature	Supports reliable operation in thermally constrained environments including industrial control modules and automotive cabin electronics.
Non-repetitive peak reverse power of 40 W	Provides robust ESD and surge immunity up to 1.0 A (100 µs), suitable for I/O line protection without external TVS devices.
SOT323 footprint compatibility	Enables direct replacement of legacy SC-70 Zeners and integration into space-constrained designs without layout redesign.

Applications

Overvoltage Protection Circuit

Reference Voltage Source

Use Scenario: Clamping input signals to prevent damage to downstream ADC inputs or microcontroller GPIOs exposed to transient surges.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess voltage above 10 V to ground.

Use Value: Limits peak voltage to ≤10.6 V with 200 nA leakage at 7 V, preserving signal integrity while protecting sensitive CMOS inputs.

Use Scenario: Providing a stable 10 V reference for op-amp-based level-shifting or comparator hysteresis networks.

IC Role / Device Role / Timing Role: Passive voltage reference element delivering fixed potential independent of supply variation.

Use Value: Delivers ±5% accuracy and +6.4 mV/K drift, enabling sub-1% error budget allocation in 12-bit measurement systems.

Power Rail Stabilization

High-Frequency Bias Network

Use Scenario: Stabilizing low-current auxiliary rails (e.g., 10 V bias for photodiode transimpedance amplifiers).

IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across load despite input ripple or load current changes.

Use Value: Maintains regulation with 150 Ω dynamic resistance, reducing output ripple by >20 dB compared to resistive divider alone.

Use Scenario: Setting DC bias points in RF amplifier stages where minimal parasitic capacitance is critical.

IC Role / Device Role / Timing Role: DC voltage reference with negligible RF loading due to 90 pF junction capacitance at 1 MHz.

Use Value: Enables stable biasing up to 100 MHz without degrading amplifier gain flatness or noise figure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5240BLT1G	10 V nominal, ±5%, 350 mW P_tot, SOT-23 package, 170 Ω r_dif	Higher power rating but larger SOT-23 footprint; less suitable for ultra-dense layouts	Select when higher continuous power margin is needed and board area permits SOT-23.
Vishay BZX84-C10-TP	10 V nominal, ±5%, 250 mW P_tot, SOT-23 package, 160 Ω r_dif, AEC-Q200 qualified	Automotive-qualified variant; not recommended for non-automotive cost-sensitive designs	Choose only if AEC-Q200 compliance is mandatory; otherwise, BZX84W-C10X offers better value for industrial use.

Compared with MMBZ5240BLT1G and BZX84-C10-TP, the BZX84W-C10X provides optimal trade-off between miniaturized SOT323 footprint, 275 mW power capability, and 150 Ω regulation stiffness-making it preferred for space-constrained industrial and consumer electronics where automotive qualification is unnecessary.

Availability

BZX84W-C10X is available at Aetrix Electronics and suitable for overvoltage protection circuits, precision reference generation, power rail stabilization, and high-frequency bias networks requiring stable component supply and consistent parametric performance across production batches.

Supply support for BZX84W-C10X 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 advanced packaging and automotive-grade components.

The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, designed specifically for compact, cost-efficient voltage regulation and clamping in consumer, industrial, and computing applications where SOT323 footprint and ±2%/±5% tolerance options are critical.

FAQ

What is the Zener test current for BZX84W-C10X?

The nominal Zener voltage of 10 V is specified at a test current of 5 mA, as defined in Table 8 of the Nexperia datasheet. This current establishes the reference operating point for voltage regulation and is used to measure differential resistance, temperature coefficient, and tolerance.

Can BZX84W-C10X be used in place of a BZX84-C10?

Yes, but with mechanical and thermal considerations: both share identical electrical specs (10 V, ±5%, SOT-23-compatible pinout), but BZX84W-C10X uses SOT323 (smaller) versus SOT-23. PCB footprint must be updated, and thermal derating differs due to lower P_tot (275 mW vs. 350 mW) and higher R_th(j-a).

What is the maximum reverse surge current BZX84W-C10X can withstand?

It supports a non-repetitive peak reverse current of 1.0 A for 100 µs pulses at T_amb = 25 °C, corresponding to 40 W peak power dissipation. This is validated per IEC 60134 absolute maximum ratings and enables basic ESD and transient suppression without additional TVS devices.

Is BZX84W-C10X suitable for automotive applications?

No-this part is explicitly marked "non-automotive qualified" in the revision history. It lacks AEC-Q200 stress testing and qualification. For automotive use, Nexperia offers the -Q qualified BZX84W-Q series; BZX84W-C10X is intended for industrial, consumer, and computing applications only.

BZX84W-C10X 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):: 10 V

Tolerance:: ±5%

Power - Max:: 275 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 200 nA @ 7 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-C10X FAQ

1.How can I place an order for BZX84W-C10X through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84W-C10X 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-C10X reliable?

The price and inventory of BZX84W-C10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C10X is usually 5 days.

3.What payment methods are accepted for BZX84W-C10X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C10X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84W-C10X?

BZX84W-C10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84W-C10X 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-C10X?

For technical support, including BZX84W-C10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C10X requirements.

6.How does Aetrix verify that BZX84W-C10X is sourced from the original manufacturer or authorized distributors?

All BZX84W-C10X 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-C10X meets industry standards.

7.What is the process for return or replacement of BZX84W-C10X?

All BZX84W-C10X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C10X, 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-C10X part is unused and in its original packaging.

Return procedure for BZX84W-C10X:

1.Submit a request within 90 days.

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

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