Equivalent & Substitute Parts for 1808J2K00331MXT

Part Overview

The 1808J2K00331MXT is a 330 pF ceramic capacitor manufactured by Knowles Syfer, rated for 2000V (2kV) operation with X7R temperature coefficient characteristics. This component is designed for general-purpose applications requiring high-voltage ceramic capacitance in a compact surface-mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent capacitance, voltage rating, package form factor, and compliance certifications align with application requirements.

Substiute Parts

1808J2K00331MXT

Knowles SyferIn Stock: 9841808J2K00331MXT Datasheet

Current PartRFQ

C1808C331JZGAC7800

KEMETIn Stock: 1221C1808C331JZGAC7800 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1808J2K00331MXT is determined by the following critical parameters:

• Capacitance value must equal 330 pF
• Package / Case must be 1808 (4520 Metric) for mechanical and electrical compatibility
• Mounting type must be Surface Mount, MLCC
• Voltage rating must meet or exceed 2000V (2kV)
• Operating temperature range must encompass -55°C to 125°C
• RoHS3 compliance and MSL 1 rating must be maintained

The identified substitute part C1808C331JZGAC7800 satisfies all substitution criteria. While this part features C0G/NP0 temperature coefficient (superior stability compared to X7R) and higher voltage rating (2500V), these represent performance enhancements rather than deviations from the core substitution parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the 1808J2K00331MXT and C1808C331JZGAC7800 maintain Active product status with full RoHS3 compliance and REACH Unaffected certification. Selection between these parts should be based on application-specific requirements:

The main part (1808J2K00331MXT) is appropriate for applications where X7R temperature coefficient performance is specified and the 2000V rating is sufficient.

The substitute part (C1808C331JZGAC7800) provides enhanced performance through C0G/NP0 temperature coefficient stability, tighter tolerance (±5% versus ±20%), and higher voltage margin (2500V versus 2000V). Physical dimensions show minor variation: the substitute is 0.008" longer and 0.006" thicker, which must be evaluated against PCB layout constraints.

Both parts carry identical ECCN (EAR99) and HTSUS (8532.24.0020) classifications.

Frequently Asked Questions (FAQ)

Q: Can C1808C331JZGAC7800 be used as a direct replacement for 1808J2K00331MXT?

A: Yes, within the constraints of PCB layout. The substitute meets all critical electrical parameters (330 pF capacitance, 1808 package, surface-mount configuration, operating temperature range). Physical dimensions differ slightly: the substitute is 0.20mm longer and 0.15mm thicker. Verify these dimensional changes do not conflict with component placement or clearance requirements.

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

A: X7R provides ±15% capacitance variation across the -55°C to 125°C operating range. C0G/NP0 provides superior stability with minimal capacitance drift across temperature. C0G/NP0 is preferred for precision applications; X7R is suitable for general-purpose filtering and coupling.

Q: Does the higher voltage rating of the substitute affect circuit performance?

A: No. Higher voltage rating provides additional safety margin and does not alter electrical behavior at the specified 2000V operating point. The substitute's 2500V rating ensures reliable operation with increased design margin.

Q: Are both parts available in the same packaging format?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly. Moisture Sensitivity Level 1 (Unlimited) applies to both, eliminating special storage or handling requirements.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99 with HTSUS code 8532.24.0020.