1812AC392MAT1A Equivalent & Substitute Parts

Part Overview

The 1812AC392MAT1A is a high-voltage ceramic capacitor manufactured by KYOCERA AVX with a capacitance of 3900 pF, rated for 1000V (1kV), and featuring X7R temperature coefficient characteristics. This surface-mount multilayer ceramic capacitor (MLCC) in 1812 (4532 Metric) package 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 in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts may be required due to inventory constraints, design upgrades for enhanced voltage ratings, or tolerance improvements in critical applications.

Substiute Parts

1812AC392MAT1A

KYOCERA AVXIn Stock: 6681812AC392MAT1A Datasheet

Current PartRFQ

1812HC392KAT1A

KYOCERA AVXIn Stock: 46461812HC392KAT1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812AC392MAT1A is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 3900 pF (exact match required)
• Temperature coefficient: X7R (ensures stable performance across operating temperature range)
• Package / Case: 1812 (4532 Metric) (ensures mechanical and electrical compatibility with PCB layout)
• Mounting type: Surface Mount, MLCC (maintains assembly process compatibility)
• Operating temperature range: -55°C to 125°C (minimum requirement)

Allowable Variation Parameters:

• Voltage rating: May be equal to or greater than 1000V (higher voltage ratings provide design margin and reliability enhancement)
• Tolerance: May be equal to or tighter than ±20% (improved tolerance provides better circuit performance)
• Physical thickness: May vary within package constraints (1812 package allows thickness variation)

The substitute part 1812HC392KAT1A meets all mandatory matching criteria while providing enhanced voltage rating (3000V) and improved tolerance (±10%), making it a direct upgrade substitute.

Parameter Comparison

Engineering Selection Recommendations

The 1812HC392KAT1A serves as a direct substitute for the 1812AC392MAT1A based on the following engineering criteria:

Both parts are manufactured by KYOCERA AVX and maintain identical capacitance values, temperature coefficients, and operating temperature ranges. The substitute part provides enhanced electrical performance through a tripled voltage rating (3000V versus 1000V) and improved tolerance specification (±10% versus ±20%), while maintaining identical footprint dimensions and surface-mount compatibility.

Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part's increased thickness (2.80mm maximum versus 1.80mm maximum) remains within standard 1812 package specifications and does not compromise PCB assembly compatibility.

Selection between these parts should be based on circuit voltage requirements and tolerance specifications. The substitute part is suitable for applications requiring higher voltage margins or tighter capacitance tolerances without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 1812HC392KAT1A replace the 1812AC392MAT1A in existing designs?

A: Yes. Both parts share identical capacitance (3900 pF), temperature coefficient (X7R), operating temperature range (-55°C to 125°C), and 1812 package footprint. The substitute part's higher voltage rating and improved tolerance do not create compatibility issues in circuits designed for the original part.

Q: What is the impact of the thickness difference between these parts?

A: The substitute part has a maximum thickness of 2.80mm compared to 1.80mm for the main part. Both values fall within the 1812 (4532 Metric) package specification range. PCB assembly processes accommodate this variation without modification.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited). Regulatory and environmental compliance requirements are equivalent.

Q: Why would a design use the higher voltage-rated substitute part?

A: Higher voltage ratings provide increased design margin and reliability in high-voltage applications. The 3000V rating of the substitute part offers enhanced safety factor compared to the 1000V rating of the main part, with no penalty to circuit performance or cost in most applications.

Q: Are both parts currently available?

A: Yes. The main part 1812AC392MAT1A has 639 pieces in stock. The substitute part 1812HC392KAT1A has 4538 pieces in stock, providing greater availability for procurement.