Equivalent & Substitute Parts for 940C6P33K

Part Overview

The 940C6P33K is a 0.33 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 600V DC voltage rating and polypropylene metallized dielectric. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing procurement and system maintenance. The 940C6P33K series is designed for high-pulse and DV/DT applications requiring stable capacitance and low equivalent series resistance across extended temperature ranges.

Substiute Parts

940C6P33K

Cornell Dubilier Electronics (CDE)In Stock: 1049940C6P33K Datasheet

Current PartRFQ

940C6P33K-F

Cornell Dubilier Electronics (CDE)In Stock: 1283940C6P33K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 940C6P33K is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Capacitance value: 0.33 µF
• Tolerance: ±10%
• Voltage rating (DC): 600V minimum
• Voltage rating (AC): 275V minimum
• Dielectric material: Polypropylene (PP), Metallized
• ESR: 9 mOhms

Mechanical Parameters (Non-Negotiable):

• Mounting type: Through Hole
• Package type: Axial
• Physical dimensions: 0.531" Dia × 1.339" L (13.50mm × 34.00mm)
• Termination: PC Pins

Environmental Parameters:

• Operating temperature range: -55°C to 105°C

The substitute part 940C6P33K-F meets all electrical, mechanical, and environmental specifications of the original part. The primary distinction is product status and compliance certification, not functional or dimensional characteristics.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Procurement: The 940C6P33K-F is the appropriate selection. This part maintains complete electrical and mechanical equivalence to the 940C6P33K while offering active product status and ROHS3 compliance. The transition from RoHS non-compliant to ROHS3 compliant status reflects current regulatory requirements for electronic components in most markets.

For Legacy System Maintenance: The 940C6P33K remains functionally equivalent to 940C6P33K-F in applications where RoHS compliance is not a contractual or regulatory requirement. Both parts deliver identical electrical performance, dimensional compatibility, and thermal characteristics. The choice between these parts depends solely on compliance mandates applicable to the end application.

Compliance Considerations: The 940C6P33K-F carries ROHS3 compliance certification, making it suitable for applications subject to RoHS Directive 2011/65/EU and amendments. The original 940C6P33K is RoHS non-compliant and should be reserved for legacy systems or applications with explicit exemptions. Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can 940C6P33K-F be used as a direct replacement for 940C6P33K in existing assemblies?

A: Yes. The 940C6P33K-F is a direct substitute with identical electrical specifications (0.33 µF, ±10%, 600V DC, 9 mOhms ESR), identical physical dimensions (0.531" Dia × 1.339" L), and identical mounting configuration (Through Hole, Axial, PC Pins). No circuit modifications or PCB layout changes are required.

Q: What is the primary difference between these two parts?

A: The 940C6P33K-F is the active production variant with ROHS3 compliance, while the 940C6P33K is obsolete and RoHS non-compliant. All functional and dimensional characteristics are identical.

Q: Are there any packaging differences between 940C6P33K and 940C6P33K-F?

A: The main part (940C6P33K) is supplied in standard packaging, while the substitute (940C6P33K-F) is supplied in bulk packaging. Both maintain identical component specifications and physical form factor.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical capacitance, voltage rating, ESR, and temperature characteristics.

Q: Can I use 940C6P33K in applications requiring RoHS certification?

A: No. The 940C6P33K is RoHS non-compliant. Applications requiring RoHS compliance must use 940C6P33K-F or equivalent compliant alternatives.

Q: What is the operating temperature range for both parts?

A: Both the 940C6P33K and 940C6P33K-F operate across -55°C to 105°C, with stable capacitance and ESR performance throughout this range.

Q: Are these parts suitable for high-pulse and DV/DT applications?

A: Yes. Both parts are specified for high-pulse and DV/DT applications, with 9 mOhms ESR and polypropylene metallized dielectric construction supporting rapid voltage transients.