04025C122MAT2A Ceramic Capacitor Equivalent & Substitute Parts

Part Overview

The 04025C122MAT2A is a 1200 pF ±20% 50V X7R ceramic capacitor manufactured by KYOCERA AVX in 0402 (1005 Metric) surface mount package. This part is classified as Active and suitable for general purpose applications including bypass and decoupling circuits. Substitute parts are necessary when the original part becomes unavailable, when tighter tolerance specifications are required, or when alternative manufacturers' inventory provides better lead times and stock availability.

Key Parameters

Parameter	Value
Capacitance	1200 pF
Tolerance	±20%
Voltage Rating	50V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	0402 (1005 Metric)
Mounting Type	Surface Mount, MLCC
Physical Dimensions	0.039" L x 0.020" W (1.00mm x 0.50mm)
Thickness (Max)	0.022" (0.56mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 04025C122MAT2A is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 1200 pF
Voltage Rating: 50V
Temperature Coefficient: X7R
Operating Temperature Range: -55°C to 125°C
Package / Case: 0402 (1005 Metric)
Physical Dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)
Mounting Type: Surface Mount, MLCC

Allowable Variation:

Tolerance: ±20%, ±10%, or ±5% (tighter tolerances are acceptable substitutes)
Thickness: 0.022" (0.56mm) or 0.022" (0.55mm) are interchangeable
Packaging Format: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level 1 (Unlimited)

Substitute parts from KYOCERA AVX, KEMET, YAGEO, Samsung Electro-Mechanics, and Murata Electronics meet these criteria with identical electrical performance and mechanical compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness	Product Status	RoHS
04025C122MAT2A	KYOCERA AVX	1200 pF	±20%	50V	X7R	0402	0.56mm	Active	ROHS3
04025C122JAT2A	KYOCERA AVX	1200 pF	±5%	50V	X7R	0402	0.56mm	Active	ROHS3
04025C122KAT2A	KYOCERA AVX	1200 pF	±10%	50V	X7R	0402	0.56mm	Active	ROHS3
C0402C122J5RAC7867	KEMET	1200 pF	±5%	50V	X7R	0402	0.55mm	Active	ROHS3
C0402C122K5RAC7867	KEMET	1200 pF	±10%	50V	X7R	0402	0.55mm	Active	ROHS3
CC0402JRX7R9BB122	YAGEO	1200 pF	±5%	50V	X7R	0402	0.55mm	Active	ROHS3
CC0402KRX7R9BB122	YAGEO	1200 pF	±10%	50V	X7R	0402	0.55mm	Active	ROHS3
CL05B122JB5NNNC	Samsung Electro-Mechanics	1200 pF	±5%	50V	X7R	0402	0.55mm	Active	ROHS3
GRM155R71H122KA01D	Murata Electronics	1200 pF	±10%	50V	X7R	0402	0.55mm	Not For New Designs	ROHS3
GRM155R71H122KA01J	Murata Electronics	1200 pF	±10%	50V	X7R	0402	0.55mm	Not For New Designs	ROHS3

Engineering Selection Recommendations

For Active Designs: Select from parts with Active product status: 04025C122JAT2A, 04025C122KAT2A, C0402C122J5RAC7867, C0402C122K5RAC7867, CC0402JRX7R9BB122, CC0402KRX7R9BB122, or CL05B122JB5NNNC. All are ROHS3 compliant with MSL 1 rating and identical electrical specifications.

Tolerance Considerations: The original 04025C122MAT2A specifies ±20% tolerance. Substitute parts with ±10% or ±5% tolerance provide tighter capacitance control and are electrically compatible. Selection between ±5% and ±10% tolerance depends on circuit requirements for capacitance accuracy.

Manufacturer Availability: KYOCERA AVX parts (04025C122JAT2A, 04025C122KAT2A) offer direct compatibility with the original manufacturer. KEMET, YAGEO, and Samsung Electro-Mechanics alternatives provide equivalent electrical and mechanical performance with different packaging options (Tape & Reel or Cut Tape & Digi-Reel).

Legacy Designs: Murata Electronics parts (GRM155R71H122KA01D, GRM155R71H122KA01J) are marked "Not For New Designs" and should be used only for legacy system maintenance or repair applications where original part sourcing is critical.

Frequently Asked Questions (FAQ)

Q: Can I substitute a ±5% tolerance part for the original ±20% part? A: Yes. The ±5% tolerance part (such as 04025C122JAT2A or CC0402JRX7R9BB122) is a direct electrical substitute. Tighter tolerance specifications are compatible with circuits designed for the original ±20% part.

Q: Are KEMET and YAGEO parts mechanically compatible with KYOCERA AVX? A: Yes. All substitute parts share identical package specifications (0402 / 1005 Metric), physical dimensions (0.039" L x 0.020" W), and mounting type (Surface Mount, MLCC). Thickness variation (0.56mm vs 0.55mm) is within acceptable PCB assembly tolerances.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging? A: Both packaging formats contain identical components. Tape & Reel (TR) is supplied in continuous reel format for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® is supplied in shorter tape segments for lower-volume or mixed-component orders. Selection depends on production volume and assembly equipment compatibility.

Q: Should I use Murata GRM parts for new designs? A: No. Murata GRM155R71H122KA01D and GRM155R71H122KA01J are marked "Not For New Designs." These parts are suitable only for maintenance, repair, or legacy system support where original component sourcing is necessary.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original 04025C122MAT2A specifications.

Q: Can I mix different manufacturers' parts in the same assembly? A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixed-manufacturer assemblies are acceptable from an engineering standpoint, though single-manufacturer sourcing may simplify supply chain management.

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