18126C104MAT2A Equivalent & Substitute Parts

Part Overview

The 18126C104MAT2A is a 0.1 µF ceramic capacitor manufactured by KYOCERA AVX, rated at 6.3V with X7R temperature coefficient in 1812 (4532 Metric) surface mount package. This part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent capacitance and temperature coefficient are maintained while voltage rating, tolerance, or manufacturer may differ based on application requirements and circuit design constraints.

Key Parameters

Parameter	Value
Manufacturer Part Number	18126C104MAT2A
Manufacturer	KYOCERA AVX
Capacitance	0.1 µF
Voltage - Rated	6.3V
Tolerance	±20%
Temperature Coefficient	X7R
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 18126C104MAT2A are qualified based on the following criteria:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 0.1 µF (exact match required)
Temperature Coefficient: X7R (exact match required)
Package / Case: 1812 (4532 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)

Allowable Variations:

Voltage Rating: May be equal to or greater than 6.3V (higher voltage ratings provide design margin)
Tolerance: May be ±5%, ±10%, or ±20% (tighter tolerances acceptable)
Manufacturer: KYOCERA AVX or KEMET (both manufacturers, both Active status)

Compliance Requirements:

RoHS3 Compliant (mandatory)
Moisture Sensitivity Level 1 (mandatory)
Active product status (mandatory)

Substitutes are organized by voltage rating upgrade path, with tolerance variations noted within each voltage tier.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Temperature Coefficient	Package	Thickness (Max)	RoHS Status	MSL
18126C104MAT2A	KYOCERA AVX	0.1 µF	6.3V	±20%	X7R	1812 (4532 Metric)	0.040" (1.02mm)	ROHS3	1
KGM43BR72A104KV	KYOCERA AVX	0.1 µF	100V	±10%	X7R	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3	1
KGM43BR72D104KV	KYOCERA AVX	0.1 µF	200V	±10%	X7R	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3	1
KGM43BR72D104MV	KYOCERA AVX	0.1 µF	200V	±20%	X7R	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3	1
C1812C104J1RAC7800	KEMET	0.1 µF	100V	±5%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104J5RAC7800	KEMET	0.1 µF	50V	±5%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104JARAC7800	KEMET	0.1 µF	250V	±5%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104K1RAC7800	KEMET	0.1 µF	100V	±10%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104K2RAC7800	KEMET	0.1 µF	200V	±10%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104K5RAC7800	KEMET	0.1 µF	50V	±10%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1
C1812C104KARAC7800	KEMET	0.1 µF	250V	±10%	X7R	1812 (4532 Metric)	0.043" (1.10mm)	ROHS3	1

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance with Moisture Sensitivity Level 1. Selection between substitutes is determined by circuit voltage requirements and tolerance specifications:

For 6.3V circuits: The original 18126C104MAT2A is the direct specification match.

For circuits requiring voltage margin above 6.3V: Substitute parts with higher voltage ratings (50V, 100V, 200V, 250V) are electrically compatible. KYOCERA AVX KGM series parts maintain the same manufacturer lineage. KEMET C1812C series parts provide equivalent electrical performance with tighter tolerance options (±5% available).

For tolerance-critical applications: KEMET parts offer ±5% tolerance. KYOCERA AVX KGM series and KEMET C1812C series with ±10% tolerance provide intermediate precision. The original 18126C104MAT2A with ±20% tolerance is suitable for general-purpose applications.

Physical considerations: KEMET parts exhibit reduced thickness (0.043" maximum) compared to KYOCERA AVX KGM series (0.057" maximum) and original part (0.040" maximum). Verify PCB layout clearance for height-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute? A: Yes. A capacitor rated at higher voltage (100V, 200V, or 250V) is electrically compatible in a 6.3V circuit. Higher voltage rating provides design margin and does not degrade performance in lower-voltage applications.

Q: What is the difference between ±5%, ±10%, and ±20% tolerance? A: Tolerance specifies the allowable deviation from the nominal 0.1 µF capacitance value. ±5% tolerance (0.095–0.105 µF) is tightest, ±10% (0.090–0.110 µF) is intermediate, and ±20% (0.080–0.120 µF) is broadest. Select based on circuit filtering or timing requirements.

Q: Are KYOCERA AVX and KEMET parts interchangeable? A: Yes, when electrical parameters (capacitance, voltage, temperature coefficient, package) and compliance certifications (RoHS3, MSL 1) are identical. Both manufacturers produce 1812 X7R ceramic capacitors meeting the same industry standards.

Q: Does package size 1812 (4532 Metric) differ between manufacturers? A: The 1812 designation is standardized. Physical dimensions are nominally identical (0.177" L × 0.126" W). Thickness varies slightly: KEMET parts are 0.043" maximum, KYOCERA AVX KGM series are 0.057" maximum. Verify PCB layout constraints for height-sensitive applications.

Q: What does X7R temperature coefficient mean? A: X7R specifies capacitance stability across the operating temperature range (-55°C to 125°C). X7R ceramic capacitors exhibit ±15% maximum capacitance change over this range, suitable for general-purpose and bypass applications.

Q: Is the original 18126C104MAT2A still available? A: Yes. 843 pieces are in stock as new original inventory. Substitute parts are available for design flexibility, voltage margin requirements, or tolerance specifications not met by the original part.

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