1812HC331KAT1A Equivalent & Substitute Parts

Part Overview

The 1812HC331KAT1A is a 330 pF high-voltage ceramic capacitor manufactured by KYOCERA AVX, rated for 3000V (3kV) operation with X7R temperature coefficient. This component is classified as Active and maintains full RoHS3 compliance with MSL 1 (Unlimited) moisture sensitivity rating. The part is available in Surface Mount MLCC configuration with 1812 (4532 Metric) package dimensions.

Substitute parts are identified when electrical parameters (capacitance, voltage rating, tolerance, temperature coefficient) and mechanical specifications (package type, physical dimensions) align within acceptable engineering tolerances for direct board-level replacement.

Substiute Parts

1812HC331KAT1A\SB

KYOCERA AVXIn Stock: 8181812HC331KAT1A\SB Datasheet

Current PartRFQ

1812HA331KAT1A

KYOCERA AVXIn Stock: 71791812HA331KAT1A Datasheet

UpgradeRFQ

C4532C0G3F331K250KA

TDK CorporationIn Stock: 17788C4532C0G3F331K250KA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812HC331KAT1A is determined by the following mandatory parameters:

• Capacitance value: 330 pF (exact match required)
• Voltage rating: 3000V minimum (equal or higher acceptable)
• Tolerance: ±10% (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Mounting type: Surface Mount, MLCC (exact match required)
• Operating temperature range: -55°C ~ 125°C minimum (equal or wider acceptable)
• RoHS3 compliance: Required
• MSL rating: 1 (Unlimited) (equal or lower MSL acceptable)

Temperature coefficient (X7R vs. C0G/NP0) represents a functional difference. X7R dielectric exhibits ±15% capacitance variation across the operating temperature range, while C0G/NP0 dielectric exhibits ±30 ppm/°C variation. Both are acceptable substitutes when circuit design permits the temperature coefficient change.

Physical dimensions (length, width, thickness) may vary within the 1812 package specification. Thickness variation is acceptable provided component height does not exceed board clearance constraints.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts meet the mandatory electrical and mechanical requirements for direct replacement of the 1812HC331KAT1A.

1812HA331KAT1A (KYOCERA AVX Upgrade): This part maintains identical manufacturer sourcing and package dimensions while upgrading the temperature coefficient from X7R to C0G/NP0. The C0G/NP0 dielectric provides superior temperature stability (±30 ppm/°C vs. ±15% for X7R). Thickness increases from 1.80mm to 2.20mm. This substitution is appropriate when improved temperature coefficient performance is required and board clearance permits the increased height.

C4532C0G3F331K250KA (TDK Corporation MFR Recommended): This part provides cross-manufacturer substitution with C0G/NP0 temperature coefficient. Physical dimensions vary slightly (length 4.50mm vs. 4.60mm; thickness 2.80mm vs. 1.80mm). All electrical parameters remain equivalent. This substitution is appropriate when TDK sourcing is preferred or when KYOCERA AVX parts are unavailable. Board clearance verification is required due to maximum thickness of 2.80mm.

All three parts maintain Active product status, ROHS3 compliance, and MSL 1 (Unlimited) rating. Selection between substitutes depends on temperature coefficient requirements, physical space constraints, and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can 1812HA331KAT1A replace 1812HC331KAT1A directly on the PCB?

A: Yes. Both parts share identical capacitance (330 pF), voltage rating (3000V), tolerance (±10%), and package (1812/4532 Metric). The primary difference is temperature coefficient (C0G/NP0 vs. X7R) and thickness (2.20mm vs. 1.80mm). Verify board clearance accommodates the increased thickness before substitution.

Q: What is the functional difference between X7R and C0G/NP0 temperature coefficients?

A: X7R dielectric exhibits ±15% capacitance change across the -55°C to 125°C operating range. C0G/NP0 dielectric exhibits ±30 ppm/°C change, resulting in significantly lower capacitance drift. For high-voltage filtering and coupling applications, C0G/NP0 provides superior stability. Circuit design must accommodate the temperature coefficient change.

Q: Can C4532C0G3F331K250KA (TDK) replace the KYOCERA AVX part?

A: Yes. Electrical parameters are identical (330 pF, 3000V, ±10%, C0G/NP0). Physical dimensions differ slightly: TDK length is 4.50mm (vs. 4.60mm) and thickness is 2.80mm (vs. 1.80mm main part). Verify PCB layout accommodates the TDK thickness before substitution. Cross-manufacturer substitution is acceptable when supply constraints require it.

Q: Are all three parts RoHS3 compliant?

A: Yes. All three parts carry ROHS3 Compliant certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.

Q: What inventory considerations apply to these substitutes?

A: The main part (1812HC331KAT1A) has 756 units in stock. The KYOCERA AVX upgrade (1812HA331KAT1A) has 7109 units available. The TDK alternative (C4532C0G3F331K250KA) has 17695 units in stock, providing the highest availability for immediate procurement.