HT55CW103MN Equivalent & Substitute Parts

Part Overview

The HT55CW103MN is a 10000 pF ceramic capacitor rated for 100V operation with X7R temperature coefficient characteristics, manufactured by KEMET. This component is designed for general-purpose applications requiring high-temperature performance across an operating range of -55°C to 200°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines to ensure design continuity and procurement availability.

Substiute Parts

HT55CW103MN

KEMETIn Stock: 1139HT55CW103MN Datasheet

Current PartRFQ

1C20X7R103K100B

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 82991C20X7R103K100B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HT55CW103MN is based on the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Capacitance value of 10000 pF (no deviation permitted)
• Voltage rating of 100V (minimum requirement)
• X7R temperature coefficient (ensures equivalent capacitance stability across temperature)
• Tolerance of ±10% or tighter (substitute 1C20X7R103K100B meets this with ±10%)

Mechanical Compatibility Criteria:

• Through-hole radial mounting configuration
• Lead spacing of 0.200" (5.08mm) for PCB footprint alignment
• Straight lead style for standard insertion

Operational Considerations: The substitute part 1C20X7R103K100B operates across -55°C to 125°C, which covers the lower portion of the original part's temperature range. Applications requiring operation above 125°C cannot use this substitute without thermal analysis.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 1C20X7R103K100B

The 1C20X7R103K100B from Vishay Beyschlag/Draloric/BC Components is the qualified substitute for the obsolete HT55CW103MN. This selection is based on:

• Electrical Equivalence: Identical capacitance (10000 pF), voltage rating (100V), and temperature coefficient (X7R)
• Mechanical Compatibility: Matching through-hole radial configuration with 0.200" lead spacing enables direct PCB footprint replacement
• Tolerance Improvement: The substitute provides ±10% tolerance, which is tighter than the original ±20%, offering improved circuit performance
• Product Status: Active manufacturing status ensures long-term availability and supply chain reliability
• Compliance: RoHS3 compliant and REACH unaffected, meeting current regulatory requirements

Temperature Range Consideration:

The substitute operates to 125°C maximum, compared to the original 200°C maximum. Applications requiring sustained operation above 125°C must conduct thermal analysis to confirm suitability or identify alternative high-temperature qualified parts.

Frequently Asked Questions (FAQ)

Q: Can the 1C20X7R103K100B be used as a direct replacement on existing PCBs designed for HT55CW103MN?

A: Yes, for applications operating within -55°C to 125°C. The identical lead spacing (0.200"), straight lead style, and radial through-hole configuration enable direct PCB insertion without layout modification. Physical dimensions differ slightly (height 0.250" vs. 0.200"), but this does not affect electrical function or standard PCB clearances.

Q: What is the significance of the tolerance difference (±20% vs. ±10%)?

A: The substitute's tighter ±10% tolerance provides superior capacitance accuracy. In applications where the original ±20% tolerance was acceptable, the substitute will perform equivalently or better. Applications with tight capacitance requirements benefit from the improved tolerance.

Q: Are there applications where the 1C20X7R103K100B cannot substitute for HT55CW103MN?

A: Yes. Applications requiring continuous operation above 125°C cannot use this substitute. The original HT55CW103MN supports -55°C to 200°C operation. For high-temperature applications, alternative X7R ceramic capacitors rated to 200°C must be evaluated.

Q: What does X7R temperature coefficient mean for substitution purposes?

A: X7R indicates capacitance variation of ±15% across the full operating temperature range. Both parts share this specification, ensuring equivalent capacitance stability characteristics across temperature. This is a critical matching criterion for circuit performance.

Q: Are there packaging or inventory considerations for this substitute?

A: The substitute (1C20X7R103K100B) is available in bulk packaging with 8274 pieces in stock, compared to 1113 pieces for the obsolete original. The active product status ensures continued availability for future procurement needs.