1812WC681MATME Equivalent & Substitute Parts

Part Overview

The 1812WC681MATME is a high-voltage ceramic capacitor manufactured by KYOCERA AVX, rated at 680 pF with 2500V (2.5kV) operating voltage and X7R temperature coefficient. This surface-mount multilayer ceramic capacitor (MLCC) in 1812 (4532 Metric) package is designed for general-purpose applications requiring high-voltage performance. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Alternative models may be required when design specifications call for higher voltage ratings, improved tolerance characteristics, or specific inventory availability.

Substiute Parts

1812WC681MATME

KYOCERA AVXIn Stock: 10771812WC681MATME Datasheet

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1812HC681KAT1A

KYOCERA AVXIn Stock: 28971812HC681KAT1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812WC681MATME is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 680 pF (exact match required)
• Temperature coefficient: X7R (ensures stable performance across operating temperature range)
• Package / Case: 1812 (4532 Metric) (maintains PCB layout compatibility)
• Mounting type: Surface Mount, MLCC (preserves assembly process compatibility)
• Physical dimensions: 4.60mm L x 3.20mm W (ensures mechanical fit)

Allowable Variation Parameters:

• Voltage rating: May be equal to or higher than 2500V
• Tolerance: May be equal to or tighter than ±20%
• Packaging format: May differ (Tape & Reel acceptable as alternative to standard packaging)

The 1812HC681KAT1A qualifies as a direct substitute because it maintains identical capacitance, temperature coefficient, package designation, and physical dimensions while offering improved voltage rating (3000V vs 2500V) and tighter tolerance (±10% vs ±20%).

Parameter Comparison

Engineering Selection Recommendations

Both the 1812WC681MATME and 1812HC681KAT1A maintain Active product status with full ROHS3 compliance and REACH unaffected designation. The 1812HC681KAT1A provides enhanced performance characteristics through higher voltage rating (3000V vs 2500V) and improved tolerance specification (±10% vs ±20%), making it suitable for applications requiring greater design margin or tighter capacitance control. Both parts are manufactured by KYOCERA AVX and share identical physical footprints and thermal operating ranges. Selection between these parts should be based on circuit voltage requirements and tolerance specifications rather than availability or compliance considerations, as both meet equivalent regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the 1812HC681KAT1A replace the 1812WC681MATME in existing designs?

A: Yes. The 1812HC681KAT1A is a direct substitute with identical capacitance, package dimensions, and temperature coefficient. The higher voltage rating (3000V vs 2500V) and tighter tolerance (±10% vs ±20%) represent performance improvements compatible with circuits designed for the original part.

Q: What are the key differences between these two parts?

A: The primary differences are voltage rating and tolerance. The 1812HC681KAT1A operates at 3000V with ±10% tolerance, while the 1812WC681MATME is rated for 2500V with ±20% tolerance. Both parts share identical capacitance values, package designations, and physical dimensions.

Q: Are there packaging format differences between these parts?

A: The 1812WC681MATME uses standard packaging, while the 1812HC681KAT1A is supplied in Tape & Reel (TR) format. Both formats are compatible with standard surface-mount assembly processes.

Q: Do these parts have different moisture sensitivity requirements?

A: No. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity precautions are required during storage or handling.

Q: Which part should be selected for new designs?

A: Selection depends on circuit voltage requirements. If the circuit operates at or below 2500V, either part is acceptable. For circuits requiring higher voltage margin or tighter capacitance tolerance, the 1812HC681KAT1A is the preferred choice.