1812HC331MAT1A Equivalent & Substitute Parts

Part Overview

The 1812HC331MAT1A 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 inventory availability with 695 pieces in stock. The part is designed for general-purpose applications requiring high-voltage performance in a compact 1812 (4532 Metric) surface-mount package.

Substitute parts are identified when equivalent electrical performance can be maintained across critical parameters: capacitance value, voltage rating, package form factor, and mounting technology. Alternative sources may be required due to supply chain considerations, lead time optimization, or design specification updates.

Substiute Parts

1812HC331MAT1A\SB

KYOCERA AVXIn Stock: 7821812HC331MAT1A\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 1812HC331MAT1A is determined by the following mandatory parameters:

• Capacitance value: 330 pF (exact match required)
• Voltage rating: 3000V minimum (equal or higher acceptable)
• Package form factor: 1812 (4532 Metric) surface-mount configuration
• Mounting technology: MLCC (Multilayer Ceramic Capacitor)
• Operating temperature range: -55°C to 125°C minimum
• Compliance certifications: ROHS3 and REACH status alignment

Temperature coefficient (X7R vs. C0G/NP0) represents a design parameter variation. C0G/NP0 dielectrics offer superior temperature stability and lower capacitance drift compared to X7R, making them suitable upgrades where tighter tolerance requirements exist. Both dielectric types maintain the same physical package dimensions and electrical ratings for this capacitance value.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and full compliance with ROHS3 and REACH regulations, confirming their suitability for current procurement and deployment.

The 1812HA331KAT1A (KYOCERA AVX upgrade) provides improved tolerance performance (±10% vs. ±20%) while maintaining identical voltage rating, package dimensions, and temperature range. The C0G/NP0 dielectric offers superior capacitance stability across the operating temperature range compared to X7R, reducing drift-related performance variation in temperature-sensitive applications.

The C4532C0G3F331K250KA (TDK Corporation) delivers equivalent electrical specifications with C0G/NP0 dielectric performance. Physical dimensions show minor variations: length reduced to 0.177" (4.50mm) and thickness increased to 0.110" (2.80mm). These dimensional differences require PCB layout verification to confirm mechanical compatibility with existing footprints designed for the original 1812 package.

Selection between substitute parts depends on design requirements for tolerance precision, dielectric stability, and available board space for component height accommodation.

Frequently Asked Questions (FAQ)

Q: Can the 1812HA331KAT1A directly replace the 1812HC331MAT1A?

A: Yes. Both parts share identical capacitance (330 pF), voltage rating (3000V), package form factor (1812/4532 Metric), and operating temperature range (-55°C to 125°C). The primary difference is improved tolerance (±10% vs. ±20%) and C0G/NP0 dielectric performance. No circuit modifications are required.

Q: What is the significance of the temperature coefficient change from X7R to C0G/NP0?

A: X7R dielectrics exhibit capacitance variation of ±15% across the -55°C to 125°C operating range. C0G/NP0 dielectrics maintain significantly tighter capacitance stability, typically ±0.3% to ±0.5% across the same temperature range. C0G/NP0 is preferred in precision timing circuits, filtering applications, and temperature-sensitive analog designs.

Q: Are there physical compatibility concerns with the C4532C0G3F331K250KA (TDK)?

A: The TDK part exhibits dimensional variations: length is 0.177" (4.50mm) versus 0.181" (4.60mm), and thickness is 0.110" (2.80mm) versus 0.071" (1.80mm) for the original part. PCB footprint and component height clearance must be verified before substitution. The reduced length may provide improved fit in space-constrained layouts, while increased thickness requires clearance validation in vertical stacking scenarios.

Q: Do all three parts meet current regulatory requirements?

A: Yes. All parts are ROHS3 Compliant and REACH Unaffected, confirming compliance with current environmental and hazardous substance regulations applicable to electronic component procurement and deployment.

Q: Which substitute part offers the best availability?

A: The C4532C0G3F331K250KA (TDK Corporation) maintains the highest inventory level at 17,695 pieces in stock, followed by the 1812HA331KAT1A at 7,109 pieces. The original 1812HC331MAT1A maintains 695 pieces in stock.