12103C155KAT2A Ceramic Capacitor 1.5µF 25V X7R 1210 Equivalent & Substitute Parts

Part Overview

The 12103C155KAT2A is a 1.5 µF ±10% 25V ceramic capacitor manufactured by KYOCERA AVX in 1210 (3225 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) with X7R temperature coefficient 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 and ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Equivalent and substitute parts are identified based on matching or exceeding electrical specifications while maintaining mechanical compatibility with the 1210 package footprint.

Key Parameters

Parameter	Value
Capacitance	1.5 µF
Tolerance	±10%
Voltage Rating	25V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 12103C155KAT2A are categorized based on the following substitution criteria:

Direct Equivalents (Same Electrical Specifications): Parts with identical capacitance (1.5 µF), tolerance (±10%), voltage rating (25V), temperature coefficient (X7R), and package (1210). These parts are pin-compatible and functionally interchangeable without circuit modification.

Voltage Upgrades (Higher Voltage Rating): Parts with identical capacitance, tolerance, temperature coefficient, and package, but with voltage ratings of 50V or 100V. These parts provide enhanced voltage margin and are mechanically and electrically compatible, though they may have different physical thickness due to dielectric material requirements.

Manufacturer Variants: Different manufacturers (KYOCERA AVX, KEMET, TDK Corporation) producing parts meeting the same electrical and mechanical specifications. All variants maintain the same 1210 footprint and surface mount compatibility.

The key parameters determining substitutability are: capacitance value, tolerance, temperature coefficient, package size, and voltage rating (equal or higher). All substitute parts maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Thickness (Max)	Product Status
12103C155KAT2A	KYOCERA AVX	1.5 µF	±10%	25V	X7R	1210 (3225 Metric)	0.110" (2.79mm)	Active
C1210C155K3RAC7800	KEMET	1.5 µF	±10%	25V	X7R	1210 (3225 Metric)	0.067" (1.70mm)	Active
C3225X7R1E155K160AM	TDK Corporation	1.5 µF	±10%	25V	X7R	1210 (3225 Metric)	0.071" (1.80mm)	Not For New Designs
12101C155KAT2A	KYOCERA AVX	1.5 µF	±10%	100V	X7R	1210 (3225 Metric)	0.110" (2.79mm)	Active
C1210C155K1RAC7800	KEMET	1.5 µF	±10%	100V	X7R	1210 (3225 Metric)	0.075" (1.90mm)	Active
C1210C155K5RAC7800	KEMET	1.5 µF	±10%	50V	X7R	1210 (3225 Metric)	0.055" (1.40mm)	Active
C3225X7R1H155K200AA	TDK Corporation	1.5 µF	±10%	50V	X7R	1210 (3225 Metric)	0.087" (2.20mm)	Not For New Designs
C3225X7R2A155K200AB	TDK Corporation	1.5 µF	±10%	100V	X7R	1210 (3225 Metric)	0.087" (2.20mm)	Active

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating): The KEMET C1210C155K3RAC7800 is an active product suitable for direct substitution. It maintains identical electrical specifications and 1210 package compatibility. The reduced thickness (0.067" vs 0.110") provides design flexibility for space-constrained applications.

For New Designs: KEMET parts (C1210C155K3RAC7800, C1210C155K1RAC7800, C1210C155K5RAC7800) and KYOCERA AVX 12103C155KAT2A are all active products with ROHS3 compliance and MSL 1 rating. These are recommended for new circuit designs.

For Voltage Margin Enhancement: When circuit design permits, the 100V-rated alternatives (12101C155KAT2A, C1210C155K1RAC7800, C3225X7R2A155K200AB) provide increased voltage headroom while maintaining identical capacitance and tolerance specifications.

Obsolescence Consideration: TDK parts C3225X7R1E155K160AM and C3225X7R1H155K200AA are marked "Not For New Designs" and should be avoided in new circuit development, though they remain available for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V or 100V rated capacitor in place of the 25V 12103C155KAT2A?

A: Yes. Higher voltage-rated capacitors with identical capacitance, tolerance, and temperature coefficient are electrically and mechanically compatible. The circuit will function correctly, and the higher voltage rating provides additional safety margin. Physical thickness may vary due to dielectric material requirements, so PCB layout clearance should be verified.

Q: Are all substitute parts mechanically compatible with the 1210 footprint?

A: Yes. All listed substitute parts use the 1210 (3225 Metric) package with identical length (0.126") and width (0.098") dimensions. Thickness varies between 0.055" and 0.110", which may affect PCB assembly clearance in space-constrained designs. Verify PCB layout accommodates the specific thickness of the selected part.

Q: What is the difference between KYOCERA AVX, KEMET, and TDK Corporation parts?

A: All three manufacturers produce ROHS3-compliant, MSL 1-rated ceramic capacitors meeting the same electrical specifications. The primary differences are manufacturing process, physical dimensions (particularly thickness), and product lifecycle status. KEMET and KYOCERA AVX parts are active products; TDK parts are marked "Not For New Designs."

Q: Can I substitute the 12103C155KAT2A with C3225X7R1E155K160AM?

A: Electrical substitution is possible, as both parts have identical capacitance, tolerance, voltage, and temperature coefficient. However, C3225X7R1E155K160AM is marked "Not For New Designs" and should only be used for legacy system maintenance or repair where the original part is unavailable.

Q: Does thickness variation affect circuit performance?

A: Thickness variation does not affect electrical performance. All parts maintain identical capacitance, tolerance, and voltage specifications. Thickness differences impact only PCB assembly clearance and component stacking in multi-layer designs. Verify available vertical space in your PCB layout before selecting a specific part.

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

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.

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