CL31C103JAFNNNF Equivalent & Substitute Parts

Part Overview

The CL31C103JAFNNNF is a 10000 pF (0.01 µF) ceramic capacitor manufactured by Samsung Electro-Mechanics, rated for 25V with C0G/NP0 temperature coefficient and ±5% tolerance. This surface mount multilayer ceramic capacitor (MLCC) in 1206 package (3216 metric) is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is currently active in production with 1063 units in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand tighter tolerances, higher voltage ratings, or when alternative manufacturers' components are preferred for supply chain diversification.

Key Parameters

Parameter	Value	Specification Basis
Capacitance	10000 pF	Core electrical specification
Voltage Rating	25V	Minimum required voltage rating
Tolerance	±5%	Acceptable tolerance range
Temperature Coefficient	C0G / NP0	Temperature stability requirement
Operating Temperature	-55°C to 125°C	Environmental operating range
Package / Case	1206 (3216 Metric)	Physical footprint compatibility
Mounting Type	Surface Mount, MLCC	Assembly process requirement
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Handling and storage requirement

Substitute Part Grouping Explanation

Substitution logic for the CL31C103JAFNNNF is based on the following criteria:

Primary Substitution Criteria (Mandatory for Direct Equivalence):

Capacitance: 10000 pF (exact match required)
Voltage Rating: 25V minimum (equal or higher voltage ratings are acceptable)
Temperature Coefficient: C0G / NP0 (required for temperature stability)
Package: 1206 (3216 Metric) (physical footprint must match)
Mounting Type: Surface Mount, MLCC
Operating Temperature: -55°C to 125°C (minimum requirement)
RoHS3 Compliance and MSL 1 rating

Secondary Substitution Criteria (Tolerance and Voltage Flexibility):

Tolerance: ±5% or tighter (±2%, ±1%) are acceptable upgrades
Voltage Rating: Parts rated at 50V or 100V can substitute for 25V applications (derating provides additional safety margin)

Substitution Categories:

Direct Equivalents (Same Voltage, Same or Tighter Tolerance): Parts with identical 25V rating and ±5% or better tolerance from alternative manufacturers (KEMET, Murata, KYOCERA AVX, TDK)
Tolerance Upgrades (Same Voltage, Tighter Tolerance): Parts with 25V rating and ±2% or ±1% tolerance, providing improved capacitance accuracy
Voltage Upgrades (Higher Voltage Rating, Same Tolerance): Parts with 50V or 100V ratings and ±5% tolerance, suitable for applications where additional voltage margin is beneficial
Obsolete or Not For New Designs: Parts marked as obsolete or not recommended for new designs are listed for reference only; active alternatives are preferred

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Temp Coeff	Package	Product Status	Inventory
CL31C103JAFNNNF	Samsung Electro-Mechanics	10000 pF	25V	±5%	C0G/NP0	1206	Active	1063 Pcs
CL31C103GAFNNWE	Samsung Electro-Mechanics	10000 pF	25V	±2%	C0G/NP0	1206	Active	724 Pcs
C1206C103J3GAC7800	KEMET	10000 pF	25V	±5%	C0G/NP0	1206	Active	14052 Pcs
C1206C103F3GAC7800	KEMET	10000 pF	25V	±1%	C0G/NP0	1206	Active	9260 Pcs
GRM3195C1E103JA01D	Murata Electronics	10000 pF	25V	±5%	C0G/NP0	1206	Not For New Designs	5000 Pcs
KGM31ACG1E103JU	KYOCERA AVX	10000 pF	25V	±5%	C0G/NP0	1206	Active	19914 Pcs
C1206C103J1GAC7800	KEMET	10000 pF	100V	±5%	C0G/NP0	1206	Active	11753 Pcs
C1206C103J5GAC7800	KEMET	10000 pF	50V	±5%	C0G/NP0	1206	Active	6662 Pcs
C3216C0G1H103J060AA	TDK Corporation	10000 pF	50V	±5%	C0G/NP0	1206	Not For New Designs	36126 Pcs
C3216C0G2A103J115AA	TDK Corporation	10000 pF	100V	±5%	C0G/NP0	1206	Active	100811 Pcs
CGJ5C2C0G1H103J060AA	TDK Corporation	10000 pF	50V	±5%	C0G/NP0	1206	Obsolete	3418 Pcs

Engineering Selection Recommendations

Tier 1: Preferred Direct Equivalents (Active Status, 25V Rating)

For applications requiring exact voltage and tolerance specifications matching the CL31C103JAFNNNF, the following active parts are recommended:

C1206C103J3GAC7800 (KEMET): Direct equivalent with ±5% tolerance, 25V rating, active product status, and highest inventory availability (14052 units). KEMET SMD Comm C0G series features low ESL characteristics.
KGM31ACG1E103JU (KYOCERA AVX): Direct equivalent with ±5% tolerance, 25V rating, active product status, and substantial inventory (19914 units). KYOCERA AVX KGM series provides alternative sourcing.

Tier 2: Tolerance Upgrades (Active Status, 25V Rating)

For applications where improved capacitance accuracy is beneficial:

CL31C103GAFNNWE (Samsung Electro-Mechanics): Same manufacturer upgrade with ±2% tolerance, 25V rating, active status. Provides tighter tolerance specification while maintaining Samsung sourcing continuity.
C1206C103F3GAC7800 (KEMET): Premium tolerance upgrade with ±1% tolerance, 25V rating, active status, and high inventory (9260 units). Suitable for precision applications requiring superior capacitance stability.

Tier 3: Voltage Upgrades (Active Status, Higher Voltage Rating)

For applications where additional voltage margin enhances reliability:

C1206C103J5GAC7800 (KEMET): 50V rated equivalent with ±5% tolerance, active status. Provides 2× voltage derating margin for enhanced safety.
C1206C103J1GAC7800 (KEMET): 100V rated equivalent with ±5% tolerance, active status. Provides 4× voltage derating margin for maximum reliability in sensitive applications.
C3216C0G2A103J115AA (TDK Corporation): 100V rated equivalent with ±5% tolerance, active status, and highest inventory availability (100811 units). TDK C series provides alternative sourcing with substantial stock.

Not Recommended for New Designs:

GRM3195C1E103JA01D (Murata Electronics): Marked "Not For New Designs"; use only for legacy system maintenance or repair.
C3216C0G1H103J060AA (TDK Corporation): Marked "Not For New Designs"; use only for legacy system maintenance or repair.
CGJ5C2C0G1H103J060AA (TDK Corporation): Obsolete status; avoid for new applications.

Compliance Verification:

All recommended parts maintain ROHS3 compliance, MSL 1 rating (unlimited moisture sensitivity), and operating temperature range of -55°C to 125°C, ensuring compatibility with the original CL31C103JAFNNNF specification.

Frequently Asked Questions (FAQ)

Q1: Can I substitute a 50V or 100V rated capacitor for the 25V CL31C103JAFNNNF?

A: Yes. Higher voltage-rated capacitors with identical capacitance, tolerance, and temperature coefficient are acceptable substitutes. The 25V application operates within the derating margin of 50V and 100V parts, providing additional safety margin. Physical dimensions and electrical performance remain equivalent.

Q2: What is the difference between ±5%, ±2%, and ±1% tolerance parts?

A: Tolerance specifies the allowable deviation from the nominal 10000 pF capacitance value. ±5% allows 9500–10500 pF; ±2% allows 9800–10200 pF; ±1% allows 9900–10100 pF. Tighter tolerance parts (±2%, ±1%) are suitable for precision circuits requiring more stable capacitance values. The CL31C103JAFNNNF with ±5% tolerance is acceptable for general-purpose applications; upgrades to ±2% or ±1% provide improved accuracy without functional incompatibility.

Q3: Are KEMET, Murata, KYOCERA AVX, and TDK parts electrically interchangeable with Samsung CL31C103JAFNNNF?

A: Yes, provided all key parameters match: 10000 pF capacitance, 25V minimum voltage rating, C0G/NP0 temperature coefficient, 1206 package, and -55°C to 125°C operating temperature. All recommended substitutes meet these criteria and are ROHS3 compliant with MSL 1 rating. Physical dimensions are identical within the 1206 package specification.

Q4: Why are some parts listed as "Not For New Designs"?

A: Parts marked "Not For New Designs" are legacy components that manufacturers no longer recommend for new circuit designs. These parts may have limited future availability or have been superseded by improved alternatives. For new applications, select parts with "Active" product status. Legacy parts are listed for reference when servicing or repairing existing equipment.

Q5: What does "Low ESL" mean in the KEMET part descriptions?

A: ESL (Equivalent Series Inductance) is the parasitic inductance of the capacitor. Low ESL design reduces high-frequency impedance and improves performance in high-speed circuits. KEMET SMD Comm C0G series parts feature optimized construction for low ESL. For general-purpose applications, low ESL is beneficial but not mandatory; standard ESL parts remain fully compatible.

Q6: How do I verify physical compatibility before substitution?

A: All recommended parts use the 1206 (3216 metric) package with identical footprint dimensions: 0.126" L × 0.063" W (3.20 mm × 1.60 mm). Thickness varies slightly between manufacturers (0.030" to 0.071"), but all values remain within standard 1206 package tolerance and are compatible with standard PCB assembly equipment. Verify thickness specifications if clearance constraints exist in your design.

Q7: Which substitute offers the best inventory availability?

A: C3216C0G2A103J115AA (TDK Corporation, 100V rated) has the highest inventory at 100811 units. For 25V rated parts, KGM31ACG1E103JU (KYOCERA AVX) offers 19914 units, and C1206C103J3GAC7800 (KEMET) offers 14052 units. Inventory levels support rapid procurement for volume production.

Q8: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in the substitute table are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity) rating, matching the environmental compliance profile of the CL31C103JAFNNNF. No additional handling or storage procedures are required when substituting between these parts.

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