1812AC332MAT3A Ceramic Capacitor - Equivalent & Substitute Parts

Part Overview

The 1812AC332MAT3A is a high-voltage ceramic capacitor manufactured by KYOCERA AVX with a capacitance of 3300 pF, rated for 1000V operation, and featuring X7R temperature stability. This surface-mount multilayer ceramic capacitor (MLCC) is designed for general-purpose applications requiring stable capacitance across a wide temperature range (-55°C to 125°C). The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance is required or when design specifications allow for upgraded voltage ratings while maintaining identical capacitance and package dimensions.

Substiute Parts

1812AC332MAT3A

KYOCERA AVXIn Stock: 7971812AC332MAT3A Datasheet

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1812HC332KAT1A

KYOCERA AVXIn Stock: 70741812HC332KAT1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1812AC332MAT3A is determined by the following critical parameters:

• Capacitance Value: Must remain 3300 pF (no tolerance variation acceptable for functional equivalence)
• Package / Case: Must be 1812 (4532 Metric) to ensure mechanical and electrical compatibility with existing PCB layouts
• Mounting Type: Must be Surface Mount, MLCC for assembly process compatibility
• Temperature Coefficient: X7R specification ensures stable capacitance performance across the operating temperature range
• Voltage Rating: May be equal to or greater than 1000V; higher voltage ratings provide design margin and are electrically compatible
• Tolerance: May be tighter (lower tolerance value) than ±20%; tighter tolerances represent improved performance
• Compliance: RoHS3 and MSL 1 ratings must be maintained

The identified substitute part 1812HC332KAT1A meets all substitution criteria with an upgraded voltage rating of 3000V and improved tolerance of ±10%.

Parameter Comparison

Engineering Selection Recommendations

Both the 1812AC332MAT3A and 1812HC332KAT1A are active production parts with ROHS3 compliance and MSL 1 ratings, ensuring regulatory compliance and handling compatibility. The 1812HC332KAT1A substitute offers three times the voltage rating (3000V versus 1000V) while maintaining identical capacitance and package footprint. The substitute part features improved tolerance (±10% versus ±20%), providing tighter capacitance control. The increased thickness of the substitute part (2.80mm versus 1.80mm) must be verified against PCB assembly clearance requirements. Selection between these parts depends on circuit voltage requirements and available board space for component height.

Frequently Asked Questions (FAQ)

Q: Can the 1812HC332KAT1A be used as a direct replacement for the 1812AC332MAT3A?

A: Yes, the 1812HC332KAT1A is electrically and mechanically compatible as a substitute. Both parts share identical capacitance (3300 pF), temperature coefficient (X7R), operating temperature range, and package footprint (1812 / 4532 Metric). The substitute provides higher voltage rating and tighter tolerance. Verify that the increased thickness (2.80mm versus 1.80mm) does not conflict with PCB assembly clearances.

Q: What is the primary difference between these two parts?

A: The main differences are voltage rating (1000V versus 3000V), tolerance (±20% versus ±10%), and thickness (1.80mm versus 2.80mm). The substitute part provides enhanced voltage margin and improved capacitance accuracy while maintaining all other electrical and mechanical specifications.

Q: Are both parts RoHS compliant?

A: Yes, both the 1812AC332MAT3A and 1812HC332KAT1A are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity) ratings, meeting current environmental and handling standards.

Q: Does the package footprint remain the same for both parts?

A: The lateral dimensions (length and width) are identical at 0.181" x 0.126" (4.60mm x 3.20mm), ensuring PCB layout compatibility. However, the thickness differs: 1.80mm for the main part and 2.80mm for the substitute. Confirm available board space before substitution.

Q: Can I use the 1812AC332MAT3A in place of the 1812HC332KAT1A?

A: No. The 1812AC332MAT3A has a lower voltage rating (1000V versus 3000V) and wider tolerance (±20% versus ±10%). Using a lower-rated part in a circuit designed for the higher-rated substitute would compromise voltage margin and may result in component failure.