12103C274KAT2A Equivalent & Substitute Parts

Part Overview

The 12103C274KAT2A is a 0.27 µF ceramic capacitor manufactured by KYOCERA AVX, rated for 25V operation with X7R temperature coefficient characteristics. This surface mount multilayer ceramic capacitor (MLCC) in 1210 package format is designed for general purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when design requirements permit higher voltage ratings or improved tolerance specifications while maintaining identical capacitance, package geometry, and temperature performance.

Substiute Parts

12103C274KAT2A

KYOCERA AVXIn Stock: 81612103C274KAT2A Datasheet

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12105C274JAT2A

KYOCERA AVXIn Stock: 524712105C274JAT2A Datasheet

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12105C274KAT2A

KYOCERA AVXIn Stock: 520012105C274KAT2A Datasheet

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C1210C274K5RAC7800

KEMETIn Stock: 5139C1210C274K5RAC7800 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 12103C274KAT2A is determined by the following criteria:

Mandatory Matching Parameters:

• Capacitance: 0.27 µF (exact match required)
• Temperature Coefficient: X7R (required for temperature stability)
• Package / Case: 1210 (3225 Metric) (required for PCB footprint compatibility)
• Mounting Type: Surface Mount, MLCC (required for assembly process compatibility)
• Operating Temperature Range: -55°C to 125°C (required for thermal performance)

Allowable Variation Parameters:

• Voltage Rating: May be equal to or greater than 25V (higher voltage rating provides design margin)
• Tolerance: May be ±10% or tighter (±5% represents improved tolerance)
• Manufacturer: Different manufacturers permitted if all mandatory parameters match

Compliance Requirements:

• RoHS3 Compliant status required
• Moisture Sensitivity Level 1 required

Three substitute parts meet these criteria: 12105C274JAT2A and 12105C274KAT2A (both KYOCERA AVX, 50V rated), and C1210C274K5RAC7800 (KEMET, 50V rated).

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active production components with ROHS3 compliance and MSL 1 rating, meeting the regulatory and environmental requirements of the original part.

12105C274JAT2A (KYOCERA AVX): This substitute provides a 50V voltage rating with improved ±5% tolerance specification. The tighter tolerance reduces capacitance variation across the operating range compared to the ±10% main part. Same manufacturer ensures consistent material composition and manufacturing process.

12105C274KAT2A (KYOCERA AVX): This substitute provides a 50V voltage rating while maintaining the ±10% tolerance of the main part. Same manufacturer and tolerance specification with elevated voltage rating for increased design margin.

C1210C274K5RAC7800 (KEMET): This substitute provides a 50V voltage rating with ±10% tolerance. Maximum thickness is 1.00mm compared to 0.94mm for the main part, representing a 0.06mm increase. KEMET manufacturing process and SMD Comm X7R series designation apply.

Selection among substitutes depends on design requirements for voltage margin, tolerance precision, and manufacturer preference. All substitutes maintain identical capacitance, temperature coefficient, package footprint, and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can 12105C274JAT2A replace 12103C274KAT2A in any application?

A: Yes, provided the circuit design permits 50V operation. The 12105C274JAT2A maintains identical capacitance (0.27 µF), temperature coefficient (X7R), package geometry (1210), and operating temperature range (-55°C to 125°C). The improved ±5% tolerance provides tighter capacitance specification than the original ±10% part.

Q: What is the primary difference between 12105C274JAT2A and 12105C274KAT2A?

A: Both parts are 50V rated KYOCERA AVX capacitors in 1210 package with identical capacitance. The 12105C274JAT2A specifies ±5% tolerance, while 12105C274KAT2A specifies ±10% tolerance. Selection depends on tolerance requirements for the application.

Q: Is C1210C274K5RAC7800 (KEMET) mechanically compatible with the original part?

A: Yes. The KEMET part maintains the 1210 (3225 Metric) package footprint and identical length and width dimensions (3.20mm × 2.50mm). Maximum thickness is 1.00mm compared to 0.94mm for the original part, representing a 0.06mm increase that does not affect PCB assembly compatibility for standard surface mount processes.

Q: Can the main part 12103C274KAT2A be used in place of the 50V rated substitutes?

A: No. The main part is rated for 25V operation. Using a 25V rated component in a circuit designed for 50V operation violates the voltage rating specification and creates reliability risk.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (12105C274JAT2A, 12105C274KAT2A, and C1210C274K5RAC7800) carry ROHS3 Compliant status with MSL 1 (Unlimited) moisture sensitivity rating, matching the regulatory compliance of the original part.

Q: What determines whether a part can substitute for 12103C274KAT2A?

A: Substitution requires exact matching of capacitance (0.27 µF), temperature coefficient (X7R), package (1210), mounting type (Surface Mount MLCC), and operating temperature range (-55°C to 125°C). Voltage rating may be equal to or greater than 25V, and tolerance may be equal to or tighter than ±10%. All parts must maintain ROHS3 compliance and MSL 1 rating.