Equivalent & Substitute Parts for 12066D106MAT2X

Part Overview

The 12066D106MAT2X is a 10 µF ±20% 6.3V ceramic capacitor manufactured by KYOCERA AVX in 1206 (3216 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) with X5R temperature coefficient is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 85°C. The part is active, ROHS3 compliant, and maintains unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained while accommodating design flexibility in tolerance, voltage rating, or temperature coefficient specifications.

Key Parameters

Parameter	Value
Capacitance	10 µF
Tolerance	±20%
Voltage - Rated	6.3V
Temperature Coefficient	X5R
Operating Temperature Range	-55°C ~ 85°C
Package / Case	1206 (3216 Metric)
Mounting Type	Surface Mount, MLCC
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 12066D106MAT2X is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance value must remain 10 µF
Package must be 1206 (3216 Metric) surface mount
Mounting type must be Surface Mount, MLCC
Physical dimensions must be 0.126" L x 0.063" W (3.20mm x 1.60mm)
RoHS3 compliance and MSL 1 rating must be maintained
Operating temperature range must support -55°C minimum

Allowable Variations:

Tolerance may be ±10% or ±20%
Voltage rating may be 6.3V, 10V, or 16V (equal or higher ratings are acceptable)
Temperature coefficient may be X5R or X7R (X7R provides extended operating range to 125°C)
Thickness may vary within manufacturer specifications (1.78mm to 1.90mm)
Packaging format may be Tape & Reel (TR) instead of standard packaging

All substitute parts listed are manufactured by KYOCERA AVX and maintain active product status with current inventory availability.

Parameter Comparison

Part Number	Capacitance	Tolerance	Voltage	Temp Coeff	Operating Temp	Package	Thickness (Max)	Inventory
12066D106MAT2X	10 µF	±20%	6.3V	X5R	-55°C ~ 85°C	1206	0.070" (1.78mm)	1074 Pcs
KGM31HR50J106KU	10 µF	±10%	6.3V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	14572 Pcs
KGM31HR50J106MU	10 µF	±20%	6.3V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	7971 Pcs
KGM31HR51A106KU	10 µF	±10%	10V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	53708 Pcs
KGM31HR51A106MU	10 µF	±20%	10V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	7599 Pcs
KGM31HR51C106KU	10 µF	±10%	16V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	25165 Pcs
KGM31HR51C106MU	10 µF	±20%	16V	X5R	-55°C ~ 85°C	1206	0.075" (1.90mm)	8498 Pcs
KGM31HR70J106KU	10 µF	±10%	6.3V	X7R	-55°C ~ 125°C	1206	0.075" (1.90mm)	4580 Pcs
KGM31HR71A106KU	10 µF	±10%	10V	X7R	-55°C ~ 125°C	1206	0.075" (1.90mm)	93591 Pcs
KGM31HR71C106KU	10 µF	±10%	16V	X7R	-55°C ~ 125°C	1206	0.075" (1.90mm)	191303 Pcs
KGM31HR71C106MU	10 µF	±20%	16V	X7R	-55°C ~ 125°C	1206	0.075" (1.90mm)	12906 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating consistent with the original 12066D106MAT2X specification. Selection among substitutes depends on application requirements:

For direct replacement with identical specifications: KGM31HR50J106MU provides matching ±20% tolerance and 6.3V rating with X5R temperature coefficient and identical operating temperature range.

For improved tolerance performance: KGM31HR50J106KU offers ±10% tolerance while maintaining 6.3V rating and X5R characteristics, suitable for applications requiring tighter capacitance control.

For higher voltage margin: KGM31HR51A106KU, KGM31HR51A106MU, KGM31HR51C106KU, and KGM31HR51C106MU provide 10V or 16V ratings with X5R temperature coefficient, appropriate for circuits with voltage headroom requirements.

For extended temperature operation: KGM31HR70J106KU, KGM31HR71A106KU, KGM31HR71C106KU, and KGM31HR71C106MU employ X7R temperature coefficient, extending the upper operating limit to 125°C while maintaining all other electrical and mechanical compatibility.

All substitute parts are active products with confirmed inventory availability and identical HTSUS and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can KGM31HR50J106KU replace 12066D106MAT2X directly?

A: Yes. Both parts share identical capacitance (10 µF), voltage rating (6.3V), temperature coefficient (X5R), operating temperature range (-55°C ~ 85°C), and 1206 package. The substitute offers improved ±10% tolerance versus ±20%, with no functional incompatibility.

Q: What is the difference between X5R and X7R temperature coefficients?

A: X5R maintains capacitance within ±15% across -55°C to 85°C. X7R maintains capacitance within ±15% across -55°C to 125°C. X7R substitutes extend the upper temperature limit by 40°C while maintaining the same lower limit.

Q: Can I use a 10V or 16V rated capacitor in place of the 6.3V original?

A: Yes. Higher voltage ratings are electrically compatible in circuits designed for 6.3V operation. The capacitor will operate safely at lower stress levels. Physical dimensions remain identical at 1206 package size.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed KGM series substitutes are supplied in Tape & Reel (TR) format. The original 12066D106MAT2X uses standard packaging. Both formats are compatible for automated assembly.

Q: Do tolerance differences affect circuit performance?

A: Tolerance affects capacitance accuracy. ±10% tolerance provides tighter control suitable for precision circuits. ±20% tolerance is acceptable for general-purpose applications where capacitance variation within this range does not impact circuit function.

Q: Are all parts RoHS3 compliant?

A: Yes. The original part and all substitutes maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message