1808J1K50331MXT Equivalent & Substitute Parts

Part Overview

The 1808J1K50331MXT is a 330 pF ceramic capacitor manufactured by Knowles Syfer, rated for 1500V (1.5kV) 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 values, compatible package dimensions, and acceptable voltage ratings are available from alternative manufacturers, enabling supply chain flexibility and inventory optimization.

Substiute Parts

1808J1K50331MXT

Knowles SyferIn Stock: 6791808J1K50331MXT Datasheet

Current PartRFQ

C1808C331JZGAC7800

KEMETIn Stock: 1221C1808C331JZGAC7800 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1808J1K50331MXT is determined by the following critical parameters:

• Capacitance Value: Must be 330 pF to maintain circuit functionality
• Package Compatibility: Must use 1808 (4520 Metric) form factor for mechanical fit
• Voltage Rating: Must meet or exceed 1500V minimum operating voltage
• Temperature Coefficient: X7R or C0G/NP0 acceptable for general-purpose applications
• Operating Temperature: Must support -55°C ~ 125°C range
• Compliance: RoHS3 compliance and MSL 1 rating required

The identified substitute C1808C331JZGAC7800 meets all substitution criteria with enhanced voltage rating (2500V) and improved tolerance (±5%), providing superior performance margins while maintaining package compatibility and compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the 1808J1K50331MXT and C1808C331JZGAC7800 maintain Active product status with full RoHS3 compliance and REACH unaffected certification. The KEMET substitute provides enhanced electrical performance through higher voltage rating (2500V versus 1500V) and tighter capacitance tolerance (±5% versus ±20%), delivering improved design margins. Physical dimensions show minor variation within the 1808 package specification, with the KEMET part measuring slightly larger in length and thickness. Selection between these parts should be based on supply availability, cost considerations, and specific circuit voltage requirements. Both components satisfy the operating temperature range and moisture sensitivity requirements for general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can the C1808C331JZGAC7800 directly replace the 1808J1K50331MXT in all applications?

A: Yes, for applications operating at or below 1500V. The KEMET substitute exceeds the voltage rating requirement and provides superior tolerance characteristics. Minor dimensional differences (0.008" length, 0.006" thickness) remain within 1808 package specifications and do not affect PCB layout compatibility.

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

A: X7R provides ±15% capacitance variation across the -55°C ~ 125°C operating range. C0G/NP0 provides superior stability with minimal capacitance drift across temperature. Both coefficients are acceptable for general-purpose applications; C0G/NP0 is preferred for precision circuits requiring stable capacitance values.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain identical compliance status: RoHS3 compliant, REACH unaffected, MSL 1 (unlimited moisture sensitivity), and EAR99 export classification. No compliance barriers exist for substitution.

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

A: No. Higher voltage rating provides additional design margin and does not degrade performance in circuits designed for 1500V operation. The substitute operates safely at all voltages up to its 2500V maximum rating.

Q: What packaging format is available for the substitute part?

A: The C1808C331JZGAC7800 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Confirm packaging requirements with procurement specifications before ordering.