HT55CW682JC Equivalent & Substitute Parts

Part Overview

The HT55CW682JC is a 6800 pF ceramic capacitor rated at 100V with X7R temperature coefficient, manufactured by KEMET. This radial through-hole component is designed for general-purpose applications requiring high-temperature operation from -55°C to 200°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain critical electrical and mechanical specifications for direct board-level substitution.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	6800 pF	Must match exactly
Voltage Rating	100V	Must match or exceed
Tolerance	±5%	Must match or be tighter
Temperature Coefficient	X7R	Determines capacitance stability across operating range
Operating Temperature Range	-55°C to 200°C	Application-dependent requirement
Mounting Type	Through Hole Radial	Must match PCB footprint
Lead Spacing	0.200" (5.08mm)	Critical for PCB hole pattern compatibility

Substitute Part Grouping Explanation

Substitution of the HT55CW682JC is based on the following electrical and mechanical compatibility criteria:

Mandatory Matching Parameters:

Capacitance value: 6800 pF
Voltage rating: 100V minimum
Tolerance: ±5% or tighter
Mounting type: Through-hole radial configuration
Lead spacing: 0.200" (5.08mm)

Acceptable Variation Parameters:

Temperature coefficient: Alternative dielectric types (C0G/NP0) are acceptable if the operating temperature range of the substitute meets or exceeds the application requirements
Physical dimensions: Substitute parts may have different body sizes provided they fit within available PCB space and maintain the specified lead spacing

The substitute part C330C682J1G5TA meets all mandatory electrical parameters and maintains identical lead spacing, enabling direct functional replacement in applications where the operating temperature range does not exceed 125°C.

Parameter Comparison

Parameter	HT55CW682JC (Main Part)	C330C682J1G5TA (Substitute)	Compatibility
Manufacturer	KEMET	KEMET	Same manufacturer
Capacitance	6800 pF	6800 pF	Exact match
Voltage Rating	100V	100V	Exact match
Tolerance	±5%	±5%	Exact match
Temperature Coefficient	X7R	C0G/NP0	Different; C0G/NP0 provides superior stability
Operating Temperature Range	-55°C to 200°C	-55°C to 125°C	Substitute has narrower range
Mounting Type	Through Hole Radial	Through Hole Radial	Exact match
Lead Spacing	0.200" (5.08mm)	0.200" (5.08mm)	Exact match
Body Dimensions	0.200" L x 0.100" W (5.08mm x 2.54mm)	0.280" L x 0.160" W (7.11mm x 4.07mm)	Substitute is larger; verify PCB clearance
Product Status	Obsolete	Active	Substitute is in active production
RoHS Status	Not specified	ROHS3 Compliant	Substitute meets current compliance

Engineering Selection Recommendations

Primary Substitute: C330C682J1G5TA

The C330C682J1G5TA is the qualified equivalent for applications where the maximum operating temperature does not exceed 125°C. This substitute provides the following advantages:

Active product status ensures long-term availability and supply chain stability
ROHS3 compliance aligns with current regulatory requirements
Identical electrical specifications (capacitance, voltage, tolerance) guarantee functional equivalence
Matching lead spacing (0.200") enables direct PCB footprint compatibility
C0G/NP0 temperature coefficient provides superior capacitance stability compared to X7R

Application Constraint:

The substitute part is not suitable for applications requiring operation above 125°C. If the circuit design mandates the full -55°C to 200°C operating range of the original HT55CW682JC, alternative sourcing strategies must be evaluated, as the substitute's temperature range is limited to -55°C to 125°C.

Physical Consideration:

The substitute part has a larger body footprint (0.280" L x 0.160" W versus 0.200" L x 0.100" W). Verify that available PCB space accommodates the increased dimensions before implementation.

Frequently Asked Questions (FAQ)

Q: Can C330C682J1G5TA be used as a direct replacement for HT55CW682JC?

A: Yes, for applications operating within -55°C to 125°C. The electrical specifications (6800 pF, 100V, ±5%) are identical, and lead spacing matches exactly. However, the substitute has a larger body size; confirm PCB clearance before installation.

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

A: X7R provides ±15% capacitance change over -55°C to 200°C. C0G/NP0 provides ±0.3% change over -55°C to 125°C. The substitute's C0G/NP0 coefficient offers superior stability within its temperature range but does not support operation above 125°C.

Q: Why is the substitute part larger?

A: The C330C682J1G5TA belongs to the GoldMax 300 series with different construction specifications. The larger body (7.11mm x 4.07mm versus 5.08mm x 2.54mm) does not affect electrical performance but requires verification of available PCB space.

Q: Is the substitute part RoHS compliant?

A: Yes, C330C682J1G5TA is ROHS3 compliant. The original HT55CW682JC compliance status is not specified in available documentation.

Q: What if my application requires operation above 125°C?

A: The C330C682J1G5TA cannot be used for applications exceeding 125°C. Alternative equivalent parts with extended temperature ranges must be sourced from KEMET or other manufacturers offering 6800 pF, 100V capacitors rated to 200°C.

Q: Are there any lead style differences?

A: Yes. The HT55CW682JC has straight leads, while C330C682J1G5TA has formed leads. Both are through-hole radial configurations with identical 0.200" lead spacing, but formed leads may require different insertion techniques.

Q: Can I use this substitute in new designs?

A: Yes. The C330C682J1G5TA is an active product with current production status, making it suitable for new designs. Its ROHS3 compliance and superior temperature coefficient stability make it preferable to the obsolete HT55CW682JC for applications within the -55°C to 125°C range.

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