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

onsemi BZX84C10

Name: BZX84C10
Brand: onsemi
SKU: BZX84C10
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C10

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84C10.pdf

Description:: DIODE ZENER 10V 350MW SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:7,294

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Product details

Overview

BZX84C10 from ON Semiconductor (formerly Fairchild) is a 10 V, 5% tolerance Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with typical zener impedance of 10 Ω at 20 mA and reverse leakage current ≤0.2 µA at 7.0 V, used for voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84C10 datasheet, pinout, applications, or equivalent options, key selection considerations include its 10 V nominal zener voltage, ±5% tolerance, low dynamic impedance, temperature coefficient of +4.5 mV/°C, and SOT-23 footprint compatibility with space-constrained PCB layouts.

Technical Context

The BZX84C10 operates as a silicon planar epitaxial Zener diode optimized for stable voltage reference and overvoltage protection in DC bias networks. It exhibits a positive temperature coefficient (+4.5 mV/°C at 5 mA), low capacitance (130 pF at 0 V), and forward voltage ≤0.9 V at 10 mA.

Its thermal design relies on junction-to-ambient resistance of 465°C/W (FR-4 board) and junction-to-lead resistance of 220°C/W, enabling reliable operation within -55°C to +150°C junction temperature range under pulsed or continuous DC conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.4–10.7 V at I_Z = 20 mA; ensures precise 10 V reference with ±5% tolerance across production lots
Zener Impedance (Z_Z)	10 Ω max at I_Z = 20 mA; enables tight regulation under varying load currents
Reverse Leakage (I_R)	≤0.2 µA at V_R = 7.0 V; minimizes standby power loss in high-impedance bias networks
Power Dissipation (P_D)	250 mW at T_A = 25°C; defines maximum continuous DC power in standard FR-4 layout
Temp. Coefficient (dV_Z/dT)	+4.5 mV/°C at I_Z = 5 mA; supports predictable drift compensation in temperature-sensitive references
Capacitance (C_J)	130 pF at V_R = 0 V, f = 1 MHz; limits high-frequency noise coupling in filtering applications

Pinout & Package

Package: SOT-23 (3-pin surface-mount plastic package); cathode marked by band; standard JEDEC MO-215 footprint.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward conduction terminal	Connected to lower potential node in reverse-biased Zener configuration
Cathode (Pin 2)	Zener breakdown terminal	Connected to higher potential node; marked side of package; carries regulated output voltage
NC / Dummy (Pin 3)	Non-connected lead	Internally unconnected; no electrical function; maintains mechanical stability in SOT-23 mold

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables direct replacement in 10 V reference designs without recalibration or resistor trimming
Low dynamic impedance (10 Ω)	Maintains <±10 mV output variation across 5–20 mA load current changes
Positive tempco (+4.5 mV/°C)	Allows predictable offset correction when paired with negative-tempco components (e.g., transistors)
SOT-23 footprint compatibility	Supports automated pick-and-place assembly and fits 2.0 × 1.25 mm PCB area constraints

Applications

Power Supply Reference	Overvoltage Clamp
Use Scenario: Providing stable 10 V reference for ADC voltage dividers and op-amp biasing in battery-powered sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage. Use Value: Delivers <±1% regulation error over -40°C to +85°C ambient due to known tempco and low Z_Z.	Use Scenario: Protecting microcontroller GPIO pins from transient surges exceeding 12 V in industrial I/O modules. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current above 10.7 V threshold. Use Value: Limits clamped voltage to ≤10.7 V with <100 ns response, preventing latch-up in 3.3 V logic interfaces.
Current Source Bias	Temperature-Compensated Reference
Use Scenario: Setting constant collector current in discrete transistor amplifiers via emitter degeneration. IC Role / Device Role / Timing Role: Voltage reference establishing fixed V_BE + V_Z across emitter resistor. Use Value: Achieves <±2% current stability over supply variations from 12 V to 15 V due to stiff 10 V node.	Use Scenario: Building a 0 ppm/°C reference by combining BZX84C10 with a forward-biased diode in series. IC Role / Device Role / Timing Role: Positive-tempco element counterbalancing negative-tempco forward diode drop. Use Value: Enables net tempco <±5 ppm/°C when matched with 1N4148 at 5 mA bias current.

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 10 V reference for ADC voltage dividers and op-amp biasing in battery-powered sensors.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage.

Use Value: Delivers <±1% regulation error over -40°C to +85°C ambient due to known tempco and low Z_Z.

Use Scenario: Protecting microcontroller GPIO pins from transient surges exceeding 12 V in industrial I/O modules.

IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current above 10.7 V threshold.

Use Value: Limits clamped voltage to ≤10.7 V with <100 ns response, preventing latch-up in 3.3 V logic interfaces.

Current Source Bias

Temperature-Compensated Reference

Use Scenario: Setting constant collector current in discrete transistor amplifiers via emitter degeneration.

IC Role / Device Role / Timing Role: Voltage reference establishing fixed V_BE + V_Z across emitter resistor.

Use Value: Achieves <±2% current stability over supply variations from 12 V to 15 V due to stiff 10 V node.

Use Scenario: Building a 0 ppm/°C reference by combining BZX84C10 with a forward-biased diode in series.

IC Role / Device Role / Timing Role: Positive-tempco element counterbalancing negative-tempco forward diode drop.

Use Value: Enables net tempco <±5 ppm/°C when matched with 1N4148 at 5 mA bias current.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5240BLT1G	10 V, ±5%, 225 mW, Z_Z = 17 Ω @ 20 mA, SOT-23	Higher Z_Z and lower P_D; less stable under dynamic loads	Acceptable where cost sensitivity outweighs regulation precision
1SMA5917BT3G	10 V, ±5%, 1.5 W, Z_Z = 7 Ω @ 20 mA, SMA package	Higher power rating and lower impedance but requires 4.5× larger PCB area	Preferred for high-current clamp or surge protection requiring >250 mW dissipation

Compared with MMBZ5240BLT1G and 1SMA5917BT3G, the BZX84C10 offers optimal balance of regulation accuracy, thermal performance in compact layouts, and cost for low-power reference and clamping-without sacrificing SOT-23 manufacturability or JEDEC compatibility.

Availability

BZX84C10 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and bias network stabilization requiring stable component supply in consumer electronics, industrial sensor modules, and automotive body-control units.

Supply support for BZX84C10 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud computing, medical, and IoT applications.

The BZX84C10 belongs to ON Semiconductor's legacy Zener diode portfolio, designed specifically for precision DC voltage regulation and transient suppression in space- and cost-constrained PCB designs.

FAQ

What is the nominal zener voltage and tolerance of the BZX84C10?

The BZX84C10 has a nominal zener voltage of 10 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 9.4 V and 10.7 V when tested at 20 mA. This tolerance is confirmed in the Electrical Characteristics table of the official ON Semiconductor datasheet Rev. 1.10, and applies across the full operating temperature range of -55°C to +150°C.

What is the maximum power dissipation rating for the BZX84C10?

The BZX84C10 is rated for 250 mW power dissipation at an ambient temperature of 25°C when mounted on a standard FR-4 PCB (76.2 mm × 114.3 mm). Derating is required above 25°C at 0.54 mW/°C based on its 465°C/W junction-to-ambient thermal resistance, as specified in the Absolute Maximum Ratings table.

Does the BZX84C10 have a positive or negative temperature coefficient?

The BZX84C10 has a positive temperature coefficient of +4.5 mV/°C at 5 mA zener current, meaning its breakdown voltage increases linearly with rising junction temperature. This value is explicitly listed in the Electrical Characteristics table and enables predictable thermal drift compensation in reference circuits.

What is the reverse leakage current specification for the BZX84C10?

The BZX84C10 specifies a maximum reverse leakage current of 0.2 µA at a reverse voltage of 7.0 V, measured at 25°C. This parameter is critical for low-power bias networks and is verified per the datasheet's Electrical Characteristics table under the "IR (µA)" column for the BZX84C10 row.

Is the BZX84C10 compatible with automated SMT assembly processes?

Yes, the BZX84C10 uses the industry-standard SOT-23 package with JEDEC MO-215 dimensions (2.0 mm × 1.25 mm × 1.1 mm), fully compatible with pick-and-place equipment and reflow soldering profiles. Its cathode marking and pin 1 orientation align with IPC-7351B land pattern recommendations for reliable automated assembly.

BZX84C10 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 10 V

Tolerance:: ±6%

Power - Max:: 350 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:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BZX84C10 FAQ

1.How can I place an order for BZX84C10 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C10 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 BZX84C10 reliable?

The price and inventory of BZX84C10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C10 is usually 5 days.

3.What payment methods are accepted for BZX84C10?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C10 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C10?

BZX84C10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C10 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 BZX84C10?

For technical support, including BZX84C10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C10 requirements.

6.How does Aetrix verify that BZX84C10 is sourced from the original manufacturer or authorized distributors?

All BZX84C10 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 BZX84C10 meets industry standards.

7.What is the process for return or replacement of BZX84C10?

All BZX84C10 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C10, 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 BZX84C10 part is unused and in its original packaging.

Return procedure for BZX84C10:

1.Submit a request within 90 days.

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

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