1812J1K00331MXT Ceramic Capacitor 330pF 1kV X7R Equivalent & Substitute Parts

Part Overview

The 1812J1K00331MXT is a surface mount multilayer ceramic capacitor (MLCC) manufactured by Knowles Syfer with a capacitance of 330 pF, rated voltage of 1000V (1kV), and X7R temperature coefficient. This component is classified as Active and ROHS3 Compliant, suitable for general purpose applications requiring high voltage ceramic capacitance in a compact 1812 (4532 Metric) package form factor. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

1812J1K00331MXT

Knowles SyferIn Stock: 11631812J1K00331MXT Datasheet

Current PartRFQ

C1812C331JDGAC7800

KEMETIn Stock: 2580C1812C331JDGAC7800 Datasheet

MFR RecommendedRFQ

C1812C331JHGAC7800

KEMETIn Stock: 1332C1812C331JHGAC7800 Datasheet

MFR RecommendedRFQ

C1812C331JZGAC7800

KEMETIn Stock: 1407C1812C331JZGAC7800 Datasheet

MFR RecommendedRFQ

CC1812JKNPOCBN331

YAGEOIn Stock: 2123CC1812JKNPOCBN331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1812J1K00331MXT are qualified based on the following criteria:

Mandatory Matching Parameters:

• Capacitance: 330 pF (exact match required)
• Package / Case: 1812 (4532 Metric) (mechanical compatibility)
• Mounting Type: Surface Mount, MLCC (assembly compatibility)
• Operating Temperature Range: -55°C ~ 125°C (functional range)
• Moisture Sensitivity Level: 1 (Unlimited) (handling and storage)
• RoHS Status: ROHS3 Compliant (regulatory compliance)
• REACH Status: REACH Unaffected (regulatory compliance)

Allowable Variation Parameters:

• Tolerance: ±5% (tighter than original ±20%, acceptable for substitution)
• Voltage Rating: Equal to or greater than 1000V (1kV) (higher voltage ratings provide equivalent or superior performance)
• Temperature Coefficient: C0G/NP0 (alternative to X7R, maintains operating temperature range)

The substitute parts listed below meet all mandatory matching criteria and allowable variation parameters.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 Compliant certification, ensuring continued availability and regulatory compliance. The substitute parts from KEMET and YAGEO are qualified alternatives based on matching capacitance, package form factor, operating temperature range, and moisture sensitivity classification.

C1812C331JDGAC7800 (KEMET): Direct voltage equivalent at 1000V (1kV) with improved tolerance specification (±5% versus ±20%). Temperature coefficient differs from original (C0G/NP0 versus X7R) but maintains the specified operating temperature range. Thickness is reduced to 0.061" (1.55mm), which may provide assembly advantages in space-constrained applications.

C1812C331JHGAC7800 (KEMET): Rated at 3000V (3kV), providing voltage margin above the 1000V (1kV) requirement. Temperature coefficient is C0G/NP0 with operating range maintained. Thickness is 0.106" (2.70mm), slightly greater than the original part.

C1812C331JZGAC7800 (KEMET): Rated at 2500V (2.5kV), providing intermediate voltage margin. Temperature coefficient is C0G/NP0. Thickness is 0.071" (1.80mm), positioned between the other KEMET options.

CC1812JKNPOCBN331 (YAGEO): Direct voltage equivalent at 1000V (1kV) with ±5% tolerance. Temperature coefficient is C0G/NP0. Thickness is 0.057" (1.45mm), the thinnest option among all substitutes.

Frequently Asked Questions (FAQ)

Q: Can C0G/NP0 temperature coefficient parts substitute for X7R parts? A: Yes, when the operating temperature range requirement (-55°C ~ 125°C) is maintained. C0G/NP0 provides superior temperature stability compared to X7R across the specified operating range.

Q: Are higher voltage rated parts (2.5kV, 3kV) acceptable substitutes for a 1kV application? A: Yes. Higher voltage ratings provide equivalent or superior electrical performance in applications rated for 1kV. The component will operate within its design margins.

Q: Does the thickness variation among substitute parts affect PCB assembly? A: Thickness variations (0.057" to 0.106") are within standard MLCC manufacturing tolerances for the 1812 package. Verify compatibility with specific assembly equipment and PCB design constraints if thickness-critical applications are involved.

Q: Are all substitute parts available in Tape & Reel (TR) packaging? A: Yes. All listed substitute parts are supplied in Tape & Reel packaging, maintaining compatibility with automated assembly processes.

Q: What is the significance of ±5% tolerance versus ±20% tolerance? A: The substitute parts feature ±5% tolerance, which is tighter than the original ±20%. This provides improved capacitance accuracy and consistency across production batches, beneficial for applications requiring precise capacitance values.

Q: Are all substitute parts ROHS3 Compliant and REACH Unaffected? A: Yes. All substitute parts listed maintain ROHS3 Compliant status and REACH Unaffected classification, ensuring regulatory compliance equivalent to the original part.