HT55CW392JC Equivalent & Substitute Parts

Part Overview

The HT55CW392JC is a 3900 pF ceramic capacitor manufactured by KEMET, rated for 100V operation with X7R temperature coefficient characteristics. This radial through-hole component is designed for high-temperature applications, supporting operating temperatures from -55°C to 200°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component procurement.

Substiute Parts

HT55CW392JC

KEMETIn Stock: 1165HT55CW392JC Datasheet

Current PartRFQ

C330C392JAG5TA

KEMETIn Stock: 957C330C392JAG5TA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HT55CW392JC is determined by the following critical parameters:

Electrical Compatibility:

• Capacitance value must be 3900 pF
• Tolerance must be ±5% or tighter
• Voltage rating must be equal to or greater than 100V
• Temperature coefficient must support the required operating temperature range

Mechanical Compatibility:

• Mounting type must be through-hole radial configuration
• Lead spacing must be 0.200" (5.08mm) to ensure PCB footprint compatibility
• Lead style must be straight

The identified substitute C330C392JAG5TA meets the electrical capacitance and tolerance requirements. However, differences in temperature coefficient, voltage rating, and operating temperature range create distinct application boundaries that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The C330C392JAG5TA provides electrical and mechanical compatibility for applications where the operating temperature requirement does not exceed 125°C. The substitute part offers higher voltage rating (250V versus 100V), which provides additional design margin in voltage-constrained applications.

Critical Limitation:

The HT55CW392JC supports operation to 200°C, while the C330C392JAG5TA is limited to 125°C maximum operating temperature. Applications requiring the full -55°C to 200°C temperature range cannot use this substitute without circuit redesign or thermal management modifications.

Temperature Coefficient Difference:

The original part uses X7R temperature coefficient, while the substitute uses C0G (NP0). C0G provides superior temperature stability with minimal capacitance variation across temperature, whereas X7R exhibits greater capacitance drift. This difference may affect circuit performance in temperature-sensitive applications.

Compliance Status:

The C330C392JAG5TA is an active product with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory alignment for new designs.

Frequently Asked Questions (FAQ)

Q: Can C330C392JAG5TA be used as a direct replacement for HT55CW392JC in all applications?

A: No. Direct substitution is limited to applications where the maximum operating temperature does not exceed 125°C. The original part supports temperatures to 200°C. Verify circuit thermal requirements before substitution.

Q: What is the significance of the different temperature coefficients (X7R versus C0G)?

A: X7R exhibits capacitance variation of ±15% across the operating temperature range, while C0G maintains capacitance within ±30 ppm/°C. For circuits sensitive to capacitance stability, C0G provides superior performance. For general-purpose applications, both are acceptable within their respective temperature ranges.

Q: Does the higher voltage rating of C330C392JAG5TA (250V versus 100V) affect circuit operation?

A: No negative effect. Higher voltage rating provides additional safety margin and does not alter circuit behavior at the same applied voltage. The capacitance value and tolerance remain identical.

Q: Are the physical dimensions compatible for PCB mounting?

A: Lead spacing is identical at 0.200" (5.08mm), ensuring PCB footprint compatibility. The substitute part has larger overall dimensions (0.280" L x 0.160" W versus 0.200" L x 0.100" W), which may require verification of available board space.

Q: What inventory status should be considered for procurement?

A: The HT55CW392JC is obsolete with 1107 pieces available. The C330C392JAG5TA is an active product with 901 pieces in stock, providing long-term procurement reliability and future availability assurance.