08055C122MAT2A Equivalent & Substitute Parts

Part Overview

The 08055C122MAT2A is a 1200 pF ±20% 50V ceramic capacitor manufactured by KYOCERA AVX with X7R temperature coefficient in 0805 (2012 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant with MSL 1 rating. Substitute parts are identified when design requirements allow tolerance relaxation, voltage rating upgrades, or temperature coefficient changes while maintaining the same capacitance value and package footprint.

Key Parameters

Parameter	Value
Capacitance	1200 pF
Tolerance	±20%
Voltage Rating	50V
Temperature Coefficient	X7R
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 08055C122MAT2A is determined by the following criteria:

Allowed Parameter Variations:

Tolerance: May be tightened from ±20% to ±10%, ±5%, ±2%, or ±1%
Voltage Rating: May be increased from 50V to 100V or 250V
Temperature Coefficient: May be changed from X7R to C0G/NP0 (more stable)
Manufacturer: Alternative qualified manufacturers accepted
Inventory availability: Higher stock levels preferred

Fixed Parameters (No Substitution Allowed):

Capacitance: 1200 pF (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
RoHS/REACH Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Inventory
08055C122MAT2A	KYOCERA AVX	1200 pF	±20%	50V	X7R	0805	726 Pcs
08051C122KAT2A	KYOCERA AVX	1200 pF	±10%	100V	X7R	0805	10639 Pcs
08055C122KAT2A	KYOCERA AVX	1200 pF	±10%	50V	X7R	0805	46020 Pcs
KGM21BCG1H122FT	KYOCERA AVX	1200 pF	±1%	50V	C0G, NP0	0805	33333 Pcs
KGM21BCG1H122GT	KYOCERA AVX	1200 pF	±2%	50V	C0G, NP0	0805	12101 Pcs
KGM21BCG1H122JT	KYOCERA AVX	1200 pF	±5%	50V	C0G, NP0	0805	12718 Pcs
C0805C122F5GAC7800	KEMET	1200 pF	±1%	50V	C0G, NP0	0805	27771 Pcs
C0805C122J1GAC7800	KEMET	1200 pF	±5%	100V	C0G, NP0	0805	3200 Pcs
C0805C122J5GAC7800	KEMET	1200 pF	±5%	50V	C0G, NP0	0805	38902 Pcs
C0805C122J5RAC7800	KEMET	1200 pF	±5%	50V	X7R	0805	4860 Pcs
C0805C122JAGAC7800	KEMET	1200 pF	±5%	250V	C0G, NP0	0805	10391 Pcs

Engineering Selection Recommendations

Direct Replacement (Same Specifications): 08055C122KAT2A is the direct equivalent from KYOCERA AVX with improved tolerance (±10% vs ±20%) at the same 50V rating and X7R temperature coefficient. This part maintains full compatibility with the original design while offering tighter capacitance tolerance.

Voltage Upgrade Options: 08051C122KAT2A (100V, X7R) and C0805C122J1GAC7800 (100V, C0G/NP0) provide increased voltage margin for designs requiring higher reliability headroom. These are suitable when circuit voltage stress analysis permits voltage rating increase.

Temperature Coefficient Upgrade (X7R to C0G/NP0): KGM21BCG1H122FT, KGM21BCG1H122GT, KGM21BCG1H122JT (KYOCERA AVX) and C0805C122F5GAC7800, C0805C122J5GAC7800 (KEMET) offer C0G/NP0 temperature coefficient with improved stability across the -55°C ~ 125°C operating range. These are applicable when circuit performance requires lower capacitance drift over temperature.

High Voltage Application: C0805C122JAGAC7800 (250V, C0G/NP0) is suitable for designs requiring maximum voltage margin and temperature stability.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions (0805 / 2012 Metric).

Frequently Asked Questions (FAQ)

Q: Can 08055C122KAT2A replace 08055C122MAT2A directly? A: Yes. Both parts are 1200 pF, 50V, X7R, 0805 package. The substitute has ±10% tolerance versus ±20%, providing improved accuracy with no design impact.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients? A: X7R provides ±15% capacitance change across -55°C ~ 125°C. C0G/NP0 provides ±30 ppm/°C (approximately ±0.3% across the same range), offering superior stability for precision applications.

Q: Can I use a 100V rated capacitor in a 50V circuit? A: Yes. Higher voltage ratings provide additional safety margin. The 08051C122KAT2A (100V) and C0805C122J1GAC7800 (100V) are direct substitutes for 50V applications.

Q: Are KYOCERA AVX and KEMET parts interchangeable? A: Yes, when electrical and mechanical parameters match. All listed KEMET parts (C0805C series) are qualified substitutes with identical 0805 package, capacitance, and operating temperature range.

Q: Does package thickness affect PCB assembly? A: KYOCERA AVX parts specify 0.037" (0.94mm) maximum thickness. KEMET parts specify 0.035" (0.88mm) maximum thickness. Both are within standard 0805 package tolerance and compatible with standard pick-and-place equipment.

Q: What inventory considerations apply to substitution? A: 08055C122KAT2A (46020 Pcs) and KGM21BCG1H122FT (33333 Pcs) offer highest availability. Selection should prioritize stock levels when design parameters permit multiple qualified options.

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