1812WC102MAT1A Equivalent & Substitute Parts

Part Overview

The 1812WC102MAT1A is a 1000 pF ceramic capacitor rated at 2.5 kV with X7R temperature coefficient, manufactured by KYOCERA AVX in 1812 (4532 Metric) surface mount package. This high-voltage MLCC is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

1812WC102MAT1A\SB

KYOCERA AVXIn Stock: 11921812WC102MAT1A\SB Datasheet

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1812HC102KAT1A

KYOCERA AVXIn Stock: 25031812HC102KAT1A Datasheet

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1812WC102KAT1A

KYOCERA AVXIn Stock: 28691812WC102KAT1A Datasheet

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KGM43FR73U102KV

KYOCERA AVXIn Stock: 3187KGM43FR73U102KV Datasheet

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KGM43FR73U102MV

KYOCERA AVXIn Stock: 1494KGM43FR73U102MV Datasheet

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C1812C102KHRAC7800

KEMETIn Stock: 1416C1812C102KHRAC7800 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Parameters:

• Capacitance value: 1000 pF (exact match required)
• Temperature coefficient: X7R (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Mounting type: Surface Mount, MLCC (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Secondary Compatibility Parameters:

• Voltage rating: Equal to or greater than 2500V
• Tolerance: ±10% or ±20% (both acceptable for general-purpose applications)
• RoHS and MSL compliance: ROHS3 Compliant and MSL 1 required

Identified Substitute Groups:

Group 1 - Same Voltage Rating (2.5 kV):

• 1812WC102KAT1A: Tighter tolerance (±10%), same voltage, same thickness profile

Group 2 - Upgraded Voltage Rating (3.0 kV):

• 1812HC102KAT1A: Tighter tolerance (±10%), higher voltage rating, reduced thickness
• KGM43FR73U102KV: Tighter tolerance (±10%), higher voltage rating, KGM-HV series, reduced thickness
• KGM43FR73U102MV: Same tolerance (±20%), higher voltage rating, KGM-HV series, reduced thickness
• C1812C102KHRAC7800: KEMET manufacturer, tighter tolerance (±10%), higher voltage rating, lower ESL feature, reduced thickness

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating): 1812WC102KAT1A is the direct equivalent with improved tolerance specification (±10% vs ±20%), maintaining identical voltage rating and thickness profile. Both parts are KYOCERA AVX products with ROHS3 compliance and MSL 1 rating.

For Upgraded Performance (Higher Voltage Rating): When higher voltage margin is required, three options provide 3000V rating with ROHS3 compliance and MSL 1 protection:

• 1812HC102KAT1A and KGM43FR73U102KV both offer ±10% tolerance with reduced thickness (0.087" vs 0.110"), providing improved board-level density.
• KGM43FR73U102MV maintains ±20% tolerance matching the original part, with 3000V rating and reduced thickness.
• C1812C102KHRAC7800 (KEMET) provides 3000V rating with ±10% tolerance and lowest thickness profile (0.071"), featuring low ESL characteristics. Cross-manufacturer substitution requires verification of procurement and supply chain requirements.

All substitute parts maintain X7R temperature coefficient, -55°C to 125°C operating range, and 1812 (4532 Metric) package compatibility.

Frequently Asked Questions (FAQ)

Q: Can 1812WC102KAT1A replace 1812WC102MAT1A directly? A: Yes. Both parts share identical electrical specifications (1000 pF, 2500V, X7R) and mechanical dimensions. The substitute offers tighter tolerance (±10% vs ±20%), which is compatible with applications designed for the original part.

Q: What is the advantage of upgrading to 3000V rated parts? A: Higher voltage rating provides increased safety margin in high-voltage applications. Parts rated 3000V can operate safely in circuits designed for 2500V operation, reducing risk of dielectric breakdown.

Q: Are the 3000V substitutes physically compatible with the original PCB layout? A: Yes, all substitute parts maintain the 1812 (4532 Metric) package footprint. However, some 3000V options feature reduced thickness (0.087" or 0.071" vs 0.110"), which may affect board clearance in space-constrained designs. Verify PCB assembly height requirements before selection.

Q: Can KEMET part C1812C102KHRAC7800 be used as a substitute? A: Yes, C1812C102KHRAC7800 meets all electrical and mechanical compatibility requirements with ROHS3 compliance and MSL 1 rating. Cross-manufacturer substitution is valid from an engineering standpoint; however, procurement and supply chain policies must be verified.

Q: What tolerance should I select for my application? A: ±20% tolerance (original specification) is suitable for general-purpose filtering and coupling applications. ±10% tolerance provides tighter capacitance control for precision circuits. Selection depends on circuit design requirements, not substitution eligibility.

Q: Are all substitute parts in active production status? A: Yes, all listed substitute parts are marked as Active product status with current inventory availability.