HT55CW103JC Equivalent & Substitute Parts

Part Overview

The HT55CW103JC 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 the -55°C to 200°C operating range. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	10000 pF	Primary electrical specification; must match exactly
Voltage Rating	100V	Minimum voltage requirement; substitutes must meet or exceed
Temperature Coefficient	X7R	Defines capacitance stability across temperature range; must match
Tolerance	±5%	Acceptable variance; substitutes with equal or tighter tolerance are compatible
Mounting Type	Through Hole Radial	Determines PCB compatibility and mechanical fit
Lead Spacing	0.200" (5.08mm)	Critical for PCB hole pattern alignment
Operating Temperature Range	-55°C to 200°C	Application-specific requirement; substitutes must support minimum range

Substitute Part Grouping Explanation

Substitution eligibility for the HT55CW103JC is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Matching Parameters:

Capacitance value: 10000 pF (no deviation)
Voltage rating: 100V minimum
Temperature coefficient: X7R
Mounting configuration: Through Hole Radial
Lead spacing: 0.200" (5.08mm)

Acceptable Variance Parameters:

Tolerance: Substitutes with ±10% tolerance are acceptable as they encompass the ±5% specification
Operating temperature range: Substitutes supporting -55°C to 125°C meet the minimum requirement for general-purpose applications, though the original part's extended range to 200°C is not replicated

The identified substitute, 1C20X7R103K100B from Vishay Beyschlag/Draloric/BC Components, satisfies all mandatory electrical parameters and mechanical compatibility requirements.

Parameter Comparison

Parameter	HT55CW103JC (KEMET)	1C20X7R103K100B (Vishay)	Compatibility Status
Capacitance	10000 pF	10000 pF	Match
Tolerance	±5%	±10%	Compatible (wider tolerance acceptable)
Voltage Rating	100V	100V	Match
Temperature Coefficient	X7R	X7R	Match
Operating Temperature	-55°C to 200°C	-55°C to 125°C	Partial (substitute covers reduced range)
Mounting Type	Through Hole Radial	Through Hole Radial	Match
Lead Spacing	0.200" (5.08mm)	0.200" (5.08mm)	Match
Package / Case	Radial	Radial	Match
Product Status	Obsolete	Active	Substitute is currently manufactured

Engineering Selection Recommendations

The 1C20X7R103K100B is a direct electrical equivalent for the HT55CW103JC based on matching capacitance, voltage rating, temperature coefficient, and mechanical form factor. The substitute part is manufactured by Vishay Beyschlag/Draloric/BC Components and maintains active product status, ensuring ongoing availability and supply chain reliability.

The primary consideration for selection is the operating temperature range differential. The substitute part supports -55°C to 125°C operation, whereas the original part extends to 200°C. Applications requiring sustained operation above 125°C must retain the original KEMET specification or identify alternative high-temperature ceramic capacitors. For general-purpose applications within the -55°C to 125°C envelope, the substitute provides equivalent electrical performance with improved supply availability.

Both parts comply with RoHS and REACH regulations where applicable. The substitute carries explicit RoHS3 compliance and REACH Unaffected status certifications.

Frequently Asked Questions (FAQ)

Q: Can the 1C20X7R103K100B be used as a direct replacement for HT55CW103JC in all applications?

A: The substitute is electrically and mechanically compatible for applications operating within -55°C to 125°C. Applications requiring operation above 125°C must verify that the reduced temperature range does not compromise circuit performance or reliability.

Q: What is the significance of the tolerance difference (±5% vs. ±10%)?

A: The original part specifies ±5% tolerance, while the substitute specifies ±10%. The substitute's wider tolerance band encompasses the original specification, making it acceptable for circuits designed around the ±5% value. No circuit redesign is required.

Q: Are the physical dimensions compatible for PCB mounting?

A: Both parts feature identical lead spacing of 0.200" (5.08mm) and radial through-hole configuration. The substitute has slightly larger body dimensions (0.200" L x 0.125" W vs. 0.200" L x 0.100" W) and greater seated height (0.250" vs. 0.200"), but these differences do not affect PCB hole pattern compatibility. Verify clearance in the immediate component area.

Q: What is the supply status difference between these parts?

A: The HT55CW103JC is obsolete and no longer manufactured. The 1C20X7R103K100B is an active product with current manufacturing and distribution, providing long-term supply security.

Q: Are there compliance or certification differences?

A: The substitute carries explicit RoHS3 compliance and REACH Unaffected certifications. Both parts share the same ECCN classification (EAR99) and are subject to identical export control regulations.

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