CL31B224KACNFNC Equivalent & Substitute Parts

Part Overview

The CL31B224KACNFNC is a 0.22 µF ±10% 25V ceramic capacitor manufactured by Samsung Electro-Mechanics in the 1206 (3216 Metric) package with X7R temperature coefficient. This multilayer ceramic capacitor (MLCC) is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection.

The CL31B224KACNFNC is currently in active product status with 974 pieces in stock. Substitute parts are identified based on matching capacitance value, tolerance, voltage rating, temperature coefficient, package dimensions, and compliance certifications. Alternative components may be required due to supply chain availability, packaging format preferences, or application-specific requirements such as automotive qualification or enhanced voltage ratings.

Key Parameters

Parameter	Value	Specification Basis
Capacitance	0.22 µF	Core electrical specification
Tolerance	±10%	Capacitance accuracy class
Voltage Rating	25V	Maximum operating voltage
Temperature Coefficient	X7R	Capacitance stability across temperature range
Operating Temperature Range	-55°C to 125°C	Functional temperature limits
Package / Case	1206 (3216 Metric)	Physical footprint and mounting compatibility
Mounting Type	Surface Mount, MLCC	Assembly method
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Moisture protection classification

Substitute Part Grouping Explanation

Substitute parts for the CL31B224KACNFNC are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Same Electrical Specifications) Direct substitutes maintain identical capacitance (0.22 µF), tolerance (±10%), voltage rating (25V), temperature coefficient (X7R), and package dimensions (1206). These parts are interchangeable at the circuit level without design modification. Differences may exist in packaging format (Tape & Reel versus Cut Tape), manufacturer, or product status.

Upgraded Substitutes (Enhanced Voltage Rating or Tolerance) Upgraded substitutes provide higher voltage ratings (50V or 100V) or tighter tolerance (±5%) while maintaining the same capacitance value, temperature coefficient, and package footprint. These parts are electrically compatible and can replace the original part in applications where higher voltage margin or improved tolerance is acceptable. Upgraded parts may include automotive qualification (AEC-Q200) or specialized features such as ESD protection.

Substitution Criteria (Mandatory Parameters)

Capacitance: 0.22 µF (exact match required)
Temperature Coefficient: X7R (required for temperature stability)
Package: 1206 (3216 Metric) (required for PCB compatibility)
Mounting Type: Surface Mount, MLCC (required for assembly compatibility)
RoHS Status: ROHS3 Compliant (required for regulatory compliance)
MSL Rating: 1 (Unlimited) (required for moisture protection)

Allowable Variations

Voltage Rating: May be equal to or greater than 25V
Tolerance: May be ±10% or tighter (±5%)
Manufacturer: Different manufacturers acceptable if all parameters match
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) acceptable
Product Status: Active or Obsolete acceptable if specifications match

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Thickness (Max)	Product Status	Packaging Format
CL31B224KACNFNC	Samsung Electro-Mechanics	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Not specified
CL31B224KBFNNNE	Samsung Electro-Mechanics	0.22 µF	±10%	50V	X7R	1206 (3216 Metric)	0.055" (1.40mm)	Active	Tape & Reel (TR)
CL31B224KACWPNC	Samsung Electro-Mechanics	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Obsolete	Cut Tape (CT)
CC1206KRX7R8BB224	YAGEO	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.037" (0.95mm)	Active	Tape & Reel (TR)
KGM31MR71E224KU	KYOCERA AVX	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.049" (1.25mm)	Active	Tape & Reel (TR)
C1206C224J1RAC7800	KEMET	0.22 µF	±5%	100V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)
C1206C224J5RAC7800	KEMET	0.22 µF	±5%	50V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)
C1206C224K1RAC7800	KEMET	0.22 µF	±10%	100V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)
C1206C224K3RACAUTO	KEMET	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)
C1206C224K3RECAUTO	KEMET	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)
C1206C224K3RECAUTO7210	KEMET	0.22 µF	±10%	25V	X7R	1206 (3216 Metric)	0.039" (1.00mm)	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

Select CC1206KRX7R8BB224 (YAGEO) or KGM31MR71E224KU (KYOCERA AVX) when direct electrical equivalence is required. Both parts maintain 0.22 µF capacitance, ±10% tolerance, 25V voltage rating, and X7R temperature coefficient in the 1206 package. These parts are in active product status with high inventory availability (71,749 and 34,024 units respectively). YAGEO CC1206KRX7R8BB224 offers the lowest profile thickness at 0.037" (0.95mm), which may be advantageous for space-constrained applications.

For Automotive Applications

Select C1206C224K3RACAUTO, C1206C224K3RECAUTO, or C1206C224K3RECAUTO7210 (all KEMET) when AEC-Q200 automotive qualification is required. These parts maintain identical electrical specifications (0.22 µF, ±10%, 25V, X7R) and are certified for automotive use. The ESD-protected variants (C1206C224K3RECAUTO and C1206C224K3RECAUTO7210) provide additional protection for sensitive applications. All three are in active product status.

For Enhanced Voltage Margin

Select CL31B224KBFNNNE (Samsung Electro-Mechanics, 50V) or C1206C224J5RAC7800 (KEMET, 50V) when a 2× voltage safety margin is required. Both maintain 0.22 µF capacitance and X7R temperature coefficient while providing 50V rating. CL31B224KBFNNNE is available in Tape & Reel format with 6,400 units in stock. C1206C224J5RAC7800 offers ±5% tolerance (tighter than ±10%) with 26,249 units in stock.

For Maximum Voltage Headroom

Select C1206C224J1RAC7800 or C1206C224K1RAC7800 (both KEMET, 100V) when maximum voltage derating is required. Both maintain 0.22 µF capacitance and X7R temperature coefficient with 100V rating. C1206C224J1RAC7800 offers ±5% tolerance with 15,536 units in stock. C1206C224K1RAC7800 maintains ±10% tolerance with 4,289 units in stock.

Avoid

CL31B224KACWPNC (Samsung Electro-Mechanics) is marked as Obsolete and should not be selected for new designs, despite matching electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V or 100V rated capacitor in place of the 25V CL31B224KACNFNC?

A: Yes. Higher voltage-rated capacitors are electrically compatible substitutes. A 50V or 100V capacitor will function correctly in a circuit designed for 25V operation. The higher voltage rating provides additional safety margin and derating capability. Physical dimensions remain identical (1206 package), so PCB compatibility is maintained.

Q: What is the difference between ±10% and ±5% tolerance capacitors?

A: Tolerance specifies the allowable deviation from the nominal capacitance value. A ±10% capacitor may vary from 0.198 µF to 0.242 µF. A ±5% capacitor may vary from 0.209 µF to 0.231 µF. Tighter tolerance (±5%) is beneficial for precision circuits requiring strict capacitance values. For general-purpose applications, ±10% tolerance is typically sufficient.

Q: Are YAGEO and KYOCERA AVX capacitors compatible with Samsung Electro-Mechanics designs?

A: Yes. All substitute parts listed maintain identical electrical specifications (0.22 µF, ±10%, 25V, X7R) and physical package dimensions (1206). Interchangeability is determined by these parameters, not manufacturer. All listed manufacturers produce ROHS3-compliant, MSL 1 rated components suitable for the same applications.

Q: What does AEC-Q200 certification mean?

A: AEC-Q200 is an automotive qualification standard for passive components. Parts bearing this certification have undergone rigorous testing for automotive applications, including temperature cycling, vibration, and reliability assessments. Select AEC-Q200 certified parts (KEMET C1206C224K3RACAUTO series) when the application is automotive or requires automotive-grade reliability.

Q: Why does CL31B224KBFNNNE have a thicker profile (0.055" vs 0.039")?

A: The increased thickness (1.40mm vs 1.00mm) on the 50V rated CL31B224KBFNNNE reflects the internal construction required to achieve higher voltage rating. Despite the thickness difference, the part maintains the same 1206 footprint and is compatible with standard 1206 PCB pads. Verify PCB clearance if height is a constraint.

Q: Can I substitute an ESD-protected variant (C1206C224K3RECAUTO) for the standard CL31B224KACNFNC?

A: Yes. ESD-protected variants maintain identical electrical specifications and package dimensions. The ESD protection feature provides additional circuit protection without affecting normal capacitor operation. This substitution is beneficial for applications exposed to electrostatic discharge risk.

Q: What is the significance of X7R temperature coefficient?

A: X7R temperature coefficient indicates that capacitance variation across the -55°C to 125°C operating range is limited to ±15% of the nominal value. This stability is suitable for general-purpose and bypass/decoupling applications where predictable capacitance across temperature extremes is required. All listed substitute parts maintain X7R specification.

Q: Are there inventory considerations when selecting substitutes?

A: Yes. Inventory levels vary significantly: CC1206KRX7R8BB224 (YAGEO) has 71,749 units available, while C1206C224K1RAC7800 (KEMET) has only 4,289 units. For high-volume production, select parts with higher inventory to ensure supply continuity. CL31B224KACNFNC (Samsung) has 974 units in stock.

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