CL21B104KACNFNC Equivalent & Substitute Parts

Part Overview

The CL21B104KACNFNC is a 0.1 µF ±10% 25V ceramic capacitor manufactured by Samsung Electro-Mechanics in the 0805 (2012 Metric) package with X7R temperature coefficient. This multilayer ceramic capacitor (MLCC) is designed for general-purpose applications including bypass and decoupling functions in electronic circuits. The part is currently active in production with 919 pieces available in new original stock. Equivalent and substitute parts are identified based on matching or exceeding electrical specifications while maintaining mechanical compatibility with the 0805 surface mount package format.

Key Parameters

Parameter	Value	Specification Basis
Capacitance	0.1 µF	Primary electrical specification
Tolerance	±10%	Capacitance accuracy
Voltage Rating	25V	Maximum operating voltage
Temperature Coefficient	X7R	Stability across temperature range
Operating Temperature	-55°C ~ 125°C	Functional temperature range
Package / Case	0805 (2012 Metric)	Physical form factor
Mounting Type	Surface Mount, MLCC	Assembly method
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level	1 (Unlimited)	Handling and storage requirements

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution logic:

Upgrade Parts (Higher Voltage Rating): Parts CL21B104KBCNFNC, CL21B104KBCNNNC, and CL21B104KBCNNWC maintain identical capacitance (0.1 µF), tolerance (±10%), temperature coefficient (X7R), and package (0805), but feature a 50V voltage rating instead of 25V. These parts are direct upgrades suitable for applications requiring higher voltage margin or operating in elevated voltage environments while maintaining all other electrical and mechanical specifications.

Parametric Equivalent (Same Voltage Rating, Different Packaging): Part CL21B104KACNNNC is manufactured by Samsung Electro-Mechanics with identical electrical specifications (0.1 µF, ±10%, 25V, X7R) and package format (0805) as the main part. The difference is in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and inventory availability.

Direct Manufacturer Equivalents (Alternative Manufacturers, Same Specifications): Parts from KEMET (C0805C104K3RAC7210, C0805C104K3RAC7800), YAGEO (CC0805KRX7R8BB104), and TDK Corporation (CGJ4J2X7R1E104K125AA) provide 0.1 µF ±10% 25V X7R capacitors in 0805 packages from different manufacturers. These maintain full electrical and mechanical compatibility.

Direct Manufacturer Equivalents (Higher Voltage Rating): Part C2012X7R2A104K125AA from TDK Corporation provides 0.1 µF ±10% at 100V rating in 0805 package. Part CGJ4J2X7R1H104K125AA from TDK Corporation provides 0.1 µF ±10% at 50V rating in 0805 package with AEC-Q200 automotive qualification.

Substitution is determined by three key parameters: capacitance value (0.1 µF), tolerance (±10%), and package format (0805). Voltage rating may be equal or higher. Temperature coefficient must remain X7R. All parts must maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Operating Temperature	RoHS Status	Product Status	Inventory (Pcs)
CL21B104KACNFNC	Samsung Electro-Mechanics	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	919
CL21B104KBCNFNC	Samsung Electro-Mechanics	0.1 µF	±10%	50V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	1828099
CL21B104KBCNNNC	Samsung Electro-Mechanics	0.1 µF	±10%	50V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	4204
CL21B104KBCNNWC	Samsung Electro-Mechanics	0.1 µF	±10%	50V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	59841
CL21B104KACNNNC	Samsung Electro-Mechanics	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	347199
C0805C104K3RAC7210	KEMET	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	20381
C0805C104K3RAC7800	KEMET	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	955952
C2012X7R2A104K125AA	TDK Corporation	0.1 µF	±10%	100V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	3300
CC0805KRX7R8BB104	YAGEO	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Active	208443
CGJ4J2X7R1E104K125AA	TDK Corporation	0.1 µF	±10%	25V	X7R	0805	-55°C ~ 125°C	ROHS3	Obsolete	1613
CGJ4J2X7R1H104K125AA	TDK Corporation	0.1 µF	±10%	50V	X7R	0805	-55°C ~ 125°C	ROHS3	Obsolete	606800

Engineering Selection Recommendations

For Direct Replacement (Same Specifications): Select CL21B104KACNNNC from Samsung Electro-Mechanics, C0805C104K3RAC7800 from KEMET, or CC0805KRX7R8BB104 from YAGEO. All three parts maintain identical electrical specifications (0.1 µF ±10% 25V X7R) and mechanical compatibility (0805 package). All are ROHS3 compliant with MSL 1 rating. CL21B104KACNNNC offers the highest inventory availability (347,199 pcs) among same-specification alternatives.

For Voltage Margin Upgrade: Select CL21B104KBCNNWC, CL21B104KBCNNNC, or CL21B104KBCNFNC from Samsung Electro-Mechanics for 50V rating, or C2012X7R2A104K125AA from TDK Corporation for 100V rating. These upgrades maintain 0.1 µF capacitance and X7R temperature coefficient while providing higher voltage headroom. CL21B104KBCNNWC provides the highest inventory (59,841 pcs) among 50V options.

For Automotive Applications: CGJ4J2X7R1E104K125AA (25V) and CGJ4J2X7R1H104K125AA (50V) from TDK Corporation carry AEC-Q200 automotive qualification. Both parts are currently obsolete but maintain substantial inventory (1,613 pcs and 606,800 pcs respectively). These parts are suitable for automotive-grade applications requiring formal qualification documentation.

Compliance Verification: All recommended parts maintain ROHS3 compliance and REACH unaffected status. All parts are classified under ECCN EAR99 and HTSUS 8532.24.0020. Moisture sensitivity level is MSL 1 (Unlimited) for all parts, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can CL21B104KBCNNWC (50V) be used as a direct replacement for CL21B104KACNFNC (25V)?

A: Yes. CL21B104KBCNNWC is a direct substitute with identical capacitance (0.1 µF), tolerance (±10%), temperature coefficient (X7R), and package format (0805). The 50V rating is higher than the original 25V specification, providing additional voltage margin. This is a valid upgrade substitution for applications where the circuit voltage does not exceed 50V.

Q: What is the difference between the Samsung parts CL21B104KACNFNC and CL21B104KACNNNC?

A: Both parts are manufactured by Samsung Electro-Mechanics with identical electrical specifications (0.1 µF ±10% 25V X7R) and package format (0805). The difference is in packaging format: CL21B104KACNFNC is supplied in Tape & Reel (TR), while CL21B104KACNNNC is supplied in Cut Tape (CT) & Digi-Reel®. CL21B104KACNNNC has significantly higher inventory availability (347,199 pcs versus 919 pcs).

Q: Are KEMET C0805C104K3RAC7210 and C0805C104K3RAC7800 interchangeable?

A: Yes. Both KEMET parts are identical in electrical specifications (0.1 µF ±10% 25V X7R) and mechanical format (0805 package). The difference is in the final digits of the part number, which typically indicate manufacturing location or date code. Both parts are active in production and fully compatible with CL21B104KACNFNC.

Q: Why are CGJ4J2X7R1E104K125AA and CGJ4J2X7R1H104K125AA marked as obsolete?

A: These TDK Corporation parts are listed with obsolete product status, indicating they are no longer in active production. However, substantial inventory remains available (1,613 pcs and 606,800 pcs respectively). Obsolete status does not affect electrical or mechanical compatibility; these parts remain suitable for applications where existing stock is available and AEC-Q200 automotive qualification is required.

Q: What is the significance of the X7R temperature coefficient?

A: X7R temperature coefficient indicates that capacitance variation across the operating temperature range (-55°C to 125°C) is limited to ±15% of the nominal value at 25°C. This specification ensures stable capacitor performance across the full operating temperature range, making X7R suitable for general-purpose and bypass/decoupling applications where temperature stability is required.

Q: Can C2012X7R2A104K125AA (100V) be used in place of CL21B104KACNFNC (25V)?

A: Yes. C2012X7R2A104K125AA is a valid substitute with identical capacitance (0.1 µF), tolerance (±10%), temperature coefficient (X7R), and package format (0805). The 100V rating significantly exceeds the original 25V specification, providing maximum voltage margin. This substitution is appropriate for any application where the circuit voltage does not exceed 100V.

Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. These parts do not require special moisture-controlled storage or handling procedures. They can be stored and handled under standard industrial conditions without desiccant packaging or moisture barrier requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference document maintain ROHS3 compliance and REACH unaffected status. All parts are suitable for applications requiring environmental compliance with European Union Restriction of Hazardous Substances directives.

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