Equivalent & Substitute Parts for 1812J2K00331MXT

Part Overview

The 1812J2K00331MXT is a 330 pF ceramic capacitor manufactured by Knowles Syfer, rated for 2000V (2kV) operation with X7R temperature coefficient characteristics. This surface mount multilayer ceramic capacitor (MLCC) in 1812 (4532 Metric) package format is designed for general purpose applications requiring high voltage performance. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching capacitance value, package format, mounting type, and voltage rating compatibility within the specified operating temperature range.

Substiute Parts

1812J2K00331MXT

Knowles SyferIn Stock: 8031812J2K00331MXT Datasheet

Current PartRFQ

C1812C331JHGAC7800

KEMETIn Stock: 1332C1812C331JHGAC7800 Datasheet

MFR RecommendedRFQ

C1812C331JZGAC7800

KEMETIn Stock: 1407C1812C331JZGAC7800 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1812J2K00331MXT are qualified based on the following criteria:

Primary Matching Parameters:

• Capacitance value: 330 pF (exact match required)
• Package format: 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)
• Voltage rating: Equal to or greater than 2000V (2kV)

Secondary Compatibility Parameters:

• RoHS compliance status (ROHS3 Compliant)
• Moisture sensitivity level (MSL 1 or better)
• Physical footprint compatibility within specified dimensions

The identified substitute parts are manufactured by KEMET and maintain electrical and mechanical compatibility with the original 1812J2K00331MXT specification. Both substitutes exceed the minimum voltage requirement while maintaining identical capacitance, package, and thermal operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Both KEMET substitute parts maintain full compatibility with the 1812J2K00331MXT in terms of package footprint, mounting methodology, and thermal operating range. All three parts carry active product status and ROHS3 compliance certification.

C1812C331JHGAC7800 (KEMET): Rated for 3000V (3kV) operation, providing 50% voltage margin above the original specification. Features C0G/NP0 temperature coefficient with tighter ±5% capacitance tolerance compared to the ±20% tolerance of the original part. Thickness specification of 0.106" (2.70mm) represents a marginal increase from the original 0.098" (2.50mm).

C1812C331JZGAC7800 (KEMET): Rated for 2500V (2.5kV) operation, providing 25% voltage margin above the original specification. Also features C0G/NP0 temperature coefficient with ±5% capacitance tolerance. Thickness specification of 0.071" (1.80mm) is reduced compared to the original part, offering potential benefits for space-constrained applications.

Both substitutes are qualified for direct replacement based on provided electrical and mechanical parameters. Selection between the two KEMET options depends on specific application voltage requirements and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can C1812C331JHGAC7800 or C1812C331JZGAC7800 be used as direct replacements for 1812J2K00331MXT?

A: Yes. Both KEMET parts match the required capacitance (330 pF), package format (1812/4532 Metric), mounting type (Surface Mount MLCC), and operating temperature range (-55°C to 125°C). Both exceed the minimum voltage requirement of 2000V and maintain ROHS3 compliance with MSL 1 rating.

Q: What is the difference between the two KEMET substitute parts?

A: The primary differences are voltage rating and physical thickness. C1812C331JHGAC7800 is rated for 3000V with 0.106" thickness, while C1812C331JZGAC7800 is rated for 2500V with 0.071" thickness. Both share identical capacitance, tolerance, temperature coefficient, and package dimensions.

Q: Will the different temperature coefficient (C0G/NP0 vs. X7R) affect circuit performance?

A: Temperature coefficient differences are determined by the dielectric material used. C0G/NP0 dielectrics provide superior temperature stability compared to X7R. The substitute parts will operate within the same -55°C to 125°C temperature range as the original part.

Q: Are there physical footprint compatibility concerns with the thickness variations?

A: The 1812 (4532 Metric) package footprint remains identical across all three parts. Thickness variations (0.098", 0.106", and 0.071") may affect board clearance in space-constrained designs. Verify PCB layout clearance requirements before selection.

Q: Do all parts carry the same compliance certifications?

A: Yes. The original 1812J2K00331MXT and both KEMET substitutes are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. All parts are classified under ECCN EAR99 and HTSUS 8532.24.0020.