942C12P22K: Equivalent & Substitute Parts Engineering Reference

Part Overview

The 942C12P22K is a 0.22 µF polypropylene film capacitor rated for 1200V DC (1.2kV) with an axial through-hole configuration, manufactured by Cornell Dubilier Electronics (CDE). The product is designated as obsolete. Substitutes are necessary for applications requiring continued sourcing or upgrades to active product lines with enhanced compliance certifications.

Substiute Parts

942C12P22K

Cornell Dubilier Electronics (CDE)In Stock: 1159942C12P22K Datasheet

Current PartRFQ

940C16P22K-F

Cornell Dubilier Electronics (CDE)In Stock: 1460940C16P22K-F Datasheet

DirectRFQ

942C12P22K-F

Cornell Dubilier Electronics (CDE)In Stock: 1137942C12P22K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for 942C12P22K is determined by the following critical parameters:

Primary Matching Criteria:

• Capacitance: 0.22 µF (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized
• Mounting Type: Through Hole
• Package / Case: Axial
• Termination: PC Pins
• Applications: High Pulse, DV/DT

Acceptable Variation Criteria:

• DC Voltage Rating: Equal to or greater than 1200V (1.2kV)
• AC Voltage Rating: Equal to or greater than 430V
• Operating Temperature Range: Must cover or exceed -55°C to +105°C
• ESR: Equivalent or lower values acceptable
• Tolerance: ±10% maintained
• Size/Dimension: Within envelope constraints of target application

The following parts meet these substitution criteria:

1. 942C12P22K-F — Direct equivalent with Active product status and RoHS3 compliance
2. 940C16P22K-F — Upgraded voltage rating with higher DC and AC ratings, reduced physical size, and RoHS3 compliance

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (942C12P22K-F): The 942C12P22K-F provides an identical electrical and mechanical specification match with upgraded product status from Obsolete to Active. This part offers RoHS3 compliance and is preferred for new designs or where regulatory requirements mandate compliant components.

For System Upgrade (940C16P22K-F): The 940C16P22K-F offers enhanced DC voltage rating (1600V versus 1200V) and AC voltage rating (500V versus 430V) while maintaining identical capacitance and tolerance. Physical dimensions are reduced (diameter 25.50mm versus 26.50mm), which benefits space-constrained PCB layouts. RoHS3 compliance is provided. Selection of this part adds safety margin to voltage stress and reduces component footprint. MSL rating is Not Applicable compared to MSL 1 for the main part.

Frequently Asked Questions (FAQ)

Q1: Can 942C12P22K-F replace 942C12P22K in all applications? The 942C12P22K-F is a direct electrical and mechanical equivalent with identical capacitance, voltage ratings, tolerance, dielectric material, package, and termination. The primary difference is product status (Active versus Obsolete) and RoHS3 compliance certification. It functions identically in applications rated for 1200V DC / 430V AC operation.

Q2: Can 940C16P22K-F replace 942C12P22K? The 940C16P22K-F meets all primary substitution criteria: 0.22 µF capacitance, polypropylene dielectric, axial through-hole package, and PC pin termination. The DC voltage rating is higher (1600V versus 1200V) and AC voltage rating is higher (500V versus 430V), providing increased voltage safety margin. Physical diameter is reduced by 1mm (25.50mm versus 26.50mm). Length and mounting characteristics remain identical.

Q3: Is there any functional limitation when substituting to a higher voltage rated part? Higher voltage ratings do not introduce functional limitations. The electrical behavior in applications operates at or below rated voltage specifications. The 940C16P22K-F maintains identical ESR characteristics (7 mOhms versus 6 mOhms for the main part) and operating temperature range, ensuring equivalent circuit performance for high pulse and DV/DT applications.

Q4: What is the difference in physical dimensions? The 942C12P22K and 942C12P22K-F share identical dimensions: 1.043" diameter x 1.339" length (26.50mm x 34.00mm). The 940C16P22K-F has a reduced diameter of 1.004" (25.50mm) while maintaining the same 1.339" length (34.00mm). Axial length and lead spacing remain unchanged across all three parts.

Q5: Are compliance certifications relevant for substitution? RoHS compliance status affects regulatory eligibility for specific markets or OEM requirements. The 942C12P22K (RoHS Non-Compliant) cannot be used in RoHS-restricted applications. Both substitute parts (942C12P22K-F and 940C16P22K-F) are RoHS3 Compliant and satisfy regulatory requirements. REACH status is Unaffected for all three parts.