CK06BX394K Equivalent & Substitute Parts Reference

Part Overview

The CK06BX394K is a 0.39 µF ceramic capacitor manufactured by Cornell Dubilier Electronics (CDE) with a rated voltage of 50V and ±10% tolerance. This component operates across the temperature range of -55°C to 125°C and features a radial through-hole mounting configuration. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

CK06BX394K

Cornell Dubilier Electronics (CDE)In Stock: 1247CK06BX394K Datasheet

Current PartRFQ

C330C394F5G5TA

KEMETIn Stock: 1067C330C394F5G5TA Datasheet

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C330C394G5G5TA

KEMETIn Stock: 1079C330C394G5G5TA Datasheet

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C330C394J5G5TA

KEMETIn Stock: 839C330C394J5G5TA Datasheet

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C330C394K5G5TA

KEMETIn Stock: 1105C330C394K5G5TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CK06BX394K is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 0.39 µF (exact match required)
• Voltage Rating: 50V (minimum requirement)
• Operating Temperature Range: -55°C to 125°C (full range coverage)
• Mounting Type: Through Hole
• Package Type: Radial
• Lead Spacing: 0.200" (5.08mm)

Allowable Variations:

• Tolerance: The original part specifies ±10%. Substitute parts with equal or tighter tolerance (±1%, ±2%, ±5%, ±10%) are electrically compatible
• Temperature Coefficient: The original BX coefficient may be substituted with C0G/NP0, which provides superior temperature stability
• Lead Style: Formed leads are compatible with straight leads in through-hole applications
• Physical Dimensions: Minor variations in length and height are acceptable provided lead spacing remains 0.200" (5.08mm)

All four KEMET substitute parts (C330C394F5G5TA, C330C394G5G5TA, C330C394J5G5TA, C330C394K5G5TA) meet these substitution criteria and are classified as active products.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The CK06BX394K is classified as obsolete. All four KEMET substitute parts (C330C394F5G5TA, C330C394G5G5TA, C330C394J5G5TA, C330C394K5G5TA) are active products with confirmed inventory availability, ensuring long-term supply chain reliability.

Compliance and Certification: The original CK06BX394K is RoHS non-compliant. All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for new designs and manufacturing operations.

Tolerance Selection:

• C330C394K5G5TA (±10% tolerance): Direct tolerance match to the original part. Select this option when the original design specifications explicitly require ±10% tolerance.
• C330C394J5G5TA (±5% tolerance): Intermediate tolerance option providing improved accuracy over the original specification.
• C330C394G5G5TA (±2% tolerance): Enhanced tolerance for applications requiring tighter capacitance control.
• C330C394F5G5TA (±1% tolerance): Highest precision option for critical circuit applications demanding minimal capacitance variation.

Temperature Coefficient Upgrade: All substitute parts feature C0G/NP0 temperature coefficient, which provides superior temperature stability compared to the original BX coefficient. This upgrade enhances circuit performance across the full operating temperature range without introducing compatibility issues.

Physical Compatibility: All substitute parts maintain the critical 0.200" (5.08mm) lead spacing required for PCB footprint compatibility. Formed leads on substitute parts are functionally equivalent to straight leads in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can C330C394K5G5TA directly replace CK06BX394K without circuit redesign?

A: Yes. The C330C394K5G5TA maintains identical capacitance (0.39 µF), voltage rating (50V), tolerance (±10%), and operating temperature range (-55°C to 125°C). The 0.200" (5.08mm) lead spacing ensures PCB footprint compatibility. Formed leads are functionally equivalent to straight leads in through-hole mounting.

Q: What is the advantage of selecting a substitute part with tighter tolerance?

A: Tighter tolerance options (±1%, ±2%, ±5%) reduce capacitance variation across the component population. This improves circuit performance consistency and reduces the need for post-assembly tuning or calibration in precision applications.

Q: Why do all substitute parts use C0G/NP0 temperature coefficient instead of BX?

A: C0G/NP0 provides superior temperature stability with minimal capacitance drift across the -55°C to 125°C operating range. This is a performance upgrade that enhances circuit reliability without introducing compatibility issues.

Q: Are the KEMET substitute parts suitable for military or high-reliability applications?

A: The substitute parts are classified as general-purpose components in the GoldMax 300 Comm C0G series. The original CK06BX394K was designated for high-reliability applications under MIL-C-11015. Application suitability depends on specific circuit requirements and qualification standards.

Q: What is the inventory status of substitute parts?

A: All four substitute parts are active products with confirmed new original inventory: C330C394F5G5TA (1046 pcs), C330C394G5G5TA (1006 pcs), C330C394J5G5TA (730 pcs), and C330C394K5G5TA (1057 pcs).

Q: Are there any RoHS or environmental compliance differences between the main part and substitutes?

A: The original CK06BX394K is RoHS non-compliant. All KEMET substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for manufacturing and distribution.

Q: Can substitute parts be used in existing PCB designs without layout modifications?

A: Yes. The 0.200" (5.08mm) lead spacing is identical across all parts. Existing through-hole PCB footprints require no modification. Formed leads on substitute parts accommodate standard PCB hole tolerances.