CK05BX823K Ceramic Capacitor: Equivalent & Substitute Parts

Part Overview

The CK05BX823K is a 0.082 µF ±10% 50V ceramic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the Military MIL-C-11015 series with radial through-hole mounting. This part is classified as obsolete, making substitute components necessary for new designs and production continuity. The CK05BX series features a BX temperature coefficient with operating range from -55°C to 125°C, designed for high-reliability applications. Equivalent alternatives are available from KEMET with improved product status and compliance certifications.

Substiute Parts

CK05BX823K

Cornell Dubilier Electronics (CDE)In Stock: 1045CK05BX823K Datasheet

Current PartRFQ

CK05BX823K

KEMETIn Stock: 1211CK05BX823K Datasheet

DirectRFQ

C322C823K1G5TA

KEMETIn Stock: 814C322C823K1G5TA Datasheet

SimilarRFQ

C322C823K1R5TA

KEMETIn Stock: 3242C322C823K1R5TA Datasheet

SimilarRFQ

C322C823K5G5TA

KEMETIn Stock: 904C322C823K5G5TA Datasheet

SimilarRFQ

C323C823K1G5TA

KEMETIn Stock: 1099C323C823K1G5TA Datasheet

SimilarRFQ

C323C823K5G5TA

KEMETIn Stock: 790C323C823K5G5TA Datasheet

SimilarRFQ

C328C823J1G5TA

KEMETIn Stock: 841C328C823J1G5TA Datasheet

SimilarRFQ

C328C823J5G5TA

KEMETIn Stock: 879C328C823J5G5TA Datasheet

SimilarRFQ

C328C823K1G5TA

KEMETIn Stock: 993C328C823K1G5TA Datasheet

SimilarRFQ

C328C823K5G5TA

KEMETIn Stock: 905C328C823K5G5TA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CK05BX823K is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

• Capacitance: 0.082 µF (exact match required)
• Operating Temperature Range: -55°C to 125°C (minimum requirement)
• Mounting Type: Through Hole Radial (PCB compatibility)
• Lead Spacing: 0.200" (5.08mm) (footprint requirement)

Secondary Substitution Criteria (Allowable Variations):

• Voltage Rating: Minimum 50V (higher ratings acceptable for derating margin)
• Tolerance: ±10% or tighter (±5% acceptable as superior alternative)
• Temperature Coefficient: BX, C0G/NP0, or X7R (all maintain -55°C to 125°C range)
• RoHS Status: Both compliant and non-compliant parts listed (application-dependent)

Direct Equivalent: CK05BX823K (KEMET) - Identical electrical and mechanical specifications to the original CDE part, with active product status.

Compatible Substitutes with Parameter Variations: Substitute parts are grouped by voltage rating and temperature coefficient, as these parameters define the application envelope while maintaining core capacitance and physical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (No Design Changes Required):

CK05BX823K (KEMET) is the direct equivalent to the obsolete Cornell Dubilier part. This KEMET version maintains identical electrical specifications (0.082 µF ±10% 50V BX), physical dimensions (0.190" x 0.090" x 0.200" height), and lead spacing (0.200"). The primary advantage is active product status with current manufacturing and availability. This part is suitable for applications requiring exact military-grade specifications without modification to existing designs.

Compliant Substitutes (Design Verification Required):

For applications requiring RoHS3 compliance, the GoldMax 300 series from KEMET provides active alternatives with improved regulatory status. These parts maintain the 0.082 µF capacitance and -55°C to 125°C operating range but introduce physical size variations and different temperature coefficients:

• C0G/NP0 Temperature Coefficient Options: C322C823K5G5TA (50V), C322C823K1G5TA (100V), C323C823K5G5TA (50V), C323C823K1G5TA (100V), C328C823K5G5TA (50V), C328C823K1G5TA (100V) provide superior temperature stability compared to BX coefficient. These are suitable for precision applications where capacitance drift must be minimized across the operating temperature range.

• X7R Temperature Coefficient Option: C322C823K1R5TA (100V) offers broader temperature stability characteristics typical of general-purpose applications.

• Tighter Tolerance Options: C328C823J5G5TA (50V ±5%) and C328C823J1G5TA (100V ±5%) provide improved capacitance accuracy for circuits requiring tighter component tolerances.

Voltage Derating Consideration:

All 100V-rated substitutes provide additional voltage margin above the 50V requirement. This derating improves component reliability in applications subject to voltage transients or ripple. Selection of 100V parts is appropriate for high-reliability applications where extended component life is required.

Physical Footprint Compatibility:

Substitute parts from the C322C, C323C, and C328C series are slightly larger (0.200" x 0.125" vs. 0.190" x 0.090") with increased height (0.260" to 0.300" vs. 0.200"). PCB layout verification is required to confirm clearance in confined spaces. Lead spacing remains constant at 0.200" (5.08mm), ensuring compatibility with existing through-hole footprints.

Frequently Asked Questions (FAQ)

Q: Can I use a 100V-rated substitute in place of the 50V CK05BX823K?

A: Yes. Higher voltage ratings are acceptable substitutes for lower voltage requirements. The 100V-rated parts (C322C823K1G5TA, C322C823K1R5TA, C323C823K1G5TA, C328C823K1G5TA) provide additional voltage margin and are suitable for 50V applications. Verify PCB layout clearance due to increased physical dimensions.

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

A: BX coefficient (original part) provides moderate temperature stability across -55°C to 125°C. C0G/NP0 coefficient offers superior stability with minimal capacitance drift over temperature, suitable for precision circuits. X7R coefficient provides broader temperature range coverage with moderate capacitance variation. All three maintain the required -55°C to 125°C operating range.

Q: Are the KEMET GoldMax 300 series parts physically compatible with the original CK05BX823K footprint?

A: Lead spacing (0.200") is identical, ensuring PCB hole compatibility. However, physical dimensions differ: GoldMax parts are 0.200" x 0.125" (vs. 0.190" x 0.090") with heights of 0.260" to 0.300" (vs. 0.200"). Verify clearance in confined spaces, near adjacent components, or under shielding.

Q: Which substitute should I select for RoHS3 compliance?

A: All GoldMax 300 series parts (C322C, C323C, C328C base numbers) are ROHS3 compliant. The direct equivalent CK05BX823K from KEMET is non-compliant. Select compliant parts for applications subject to RoHS3 regulatory requirements.

Q: Can I substitute a ±5% tolerance part for the ±10% original?

A: Yes. Tighter tolerance (±5%) is a superior specification and is acceptable as a substitute. Parts C328C823J5G5TA (50V) and C328C823J1G5TA (100V) provide improved capacitance accuracy. This substitution is appropriate for circuits requiring tighter component tolerances.

Q: What is the inventory status of these substitute parts?

A: KEMET CK05BX823K (direct equivalent) has 1,158 pieces in stock. GoldMax 300 series substitutes range from 724 to 3,160 pieces in stock, with C322C823K1R5TA (X7R, 100V) offering the highest availability at 3,160 pieces.

Q: Is the original CDE CK05BX823K still available?

A: The original Cornell Dubilier part is classified as obsolete with 1,015 pieces remaining in inventory. The KEMET equivalent CK05BX823K is the recommended replacement for new designs and production continuity.

Q: Can I use these capacitors in military or aerospace applications?

A: The original CK05BX823K is specified to MIL-C-11015 military standard. The KEMET equivalent maintains this specification. GoldMax 300 series parts are commercial-grade components. Verify compliance with specific military or aerospace procurement requirements before substitution.