1812WC332MAT1A Equivalent & Substitute Parts

Part Overview

The 1812WC332MAT1A is a high-voltage ceramic capacitor manufactured by KYOCERA AVX with a capacitance of 3300 pF, rated voltage of 2500V (2.5kV), and X7R temperature coefficient. This surface-mount multilayer ceramic capacitor (MLCC) in 1812 (4532 Metric) package is designed for general-purpose applications requiring stable performance across the -55°C to 125°C operating temperature range. The part is currently active in production with ROHS3 compliance and MSL 1 rating. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support component selection based on specific tolerance and voltage requirements.

Substiute Parts

1812WC332MAT1A

KYOCERA AVXIn Stock: 10271812WC332MAT1A Datasheet

Current PartRFQ

1812HC332KAT1A

KYOCERA AVXIn Stock: 70741812HC332KAT1A Datasheet

UpgradeRFQ

1812WC332KAT1A

KYOCERA AVXIn Stock: 106151812WC332KAT1A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812WC332MAT1A is determined by the following critical parameters: identical capacitance value (3300 pF), identical package type (1812/4532 Metric), identical temperature coefficient (X7R), identical mounting type (Surface Mount MLCC), and compatible voltage rating (equal to or greater than 2500V). Tolerance variations are permitted within the scope of circuit design requirements. All substitute parts must maintain the same physical dimensions, operating temperature range, and compliance certifications (ROHS3, REACH Unaffected, EAR99).

The identified substitutes are grouped as follows:

Upgrade Substitute (Higher Voltage Rating): 1812HC332KAT1A provides increased voltage margin at 3000V (3kV) with improved tolerance (±10%) while maintaining all other critical parameters.

Manufacturer Recommended Substitute (Same Voltage, Improved Tolerance): 1812WC332KAT1A offers tighter tolerance (±10%) at the same 2500V rating, providing enhanced precision for applications requiring stricter capacitance control.

Parameter Comparison

Engineering Selection Recommendations

All three parts—1812WC332MAT1A, 1812HC332KAT1A, and 1812WC332KAT1A—are active production components from KYOCERA AVX with full ROHS3 compliance and REACH Unaffected status. Selection between these parts depends on circuit-specific requirements:

1812WC332MAT1A is the baseline specification with ±20% tolerance and 2500V rating. This part is suitable for general-purpose applications where tolerance and voltage margins are adequate.

1812HC332KAT1A provides an upgrade path with 500V additional voltage headroom (3000V rating) and tighter ±10% tolerance. This substitution is appropriate for designs requiring enhanced reliability margins or stricter capacitance control in high-voltage environments.

1812WC332KAT1A maintains the 2500V rating while offering ±10% tolerance improvement over the main part. This substitution is appropriate for applications where capacitance precision is critical at the original voltage specification.

All parts share identical physical dimensions, operating temperature range (-55°C to 125°C), MSL 1 rating, and export classification (EAR99), ensuring direct compatibility in PCB layouts and manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can 1812HC332KAT1A be used as a direct replacement for 1812WC332MAT1A?

A: Yes. The 1812HC332KAT1A is a direct substitute with identical capacitance (3300 pF), temperature coefficient (X7R), package (1812/4532 Metric), and physical dimensions. The higher voltage rating (3000V vs. 2500V) and improved tolerance (±10% vs. ±20%) represent enhancements that do not compromise compatibility.

Q: What is the difference between the tolerance ratings ±20% and ±10%?

A: Tolerance defines the allowable deviation of actual capacitance from the nominal 3300 pF value. ±20% permits a range of 2640 pF to 3960 pF, while ±10% restricts the range to 2970 pF to 3630 pF. Tighter tolerance (±10%) is required for applications with strict capacitance specifications.

Q: Are there any physical dimension differences between these parts?

A: No. All three parts share identical dimensions: 0.181" L x 0.126" W (4.60mm x 3.20mm) with maximum thickness of 0.110" (2.80mm). They are fully interchangeable in PCB layouts.

Q: Do all parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant, REACH Unaffected, classified as EAR99, and rated MSL 1 (Unlimited moisture sensitivity). They meet identical environmental and regulatory standards.

Q: Which substitute should be selected for a new design?

A: For new designs, 1812WC332KAT1A is recommended as the manufacturer-preferred option, offering the same voltage rating as the original specification with improved ±10% tolerance. If additional voltage margin is beneficial, 1812HC332KAT1A provides 500V additional headroom.

Q: Is the X7R temperature coefficient identical across all parts?

A: Yes. All three parts use X7R temperature coefficient, ensuring stable capacitance performance across the -55°C to 125°C operating temperature range.