DCM763U040DF2A Equivalent & Substitute Parts

Part Overview

The DCM763U040DF2A is a 76000 µF, 40 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can-style package with screw terminals. This component is classified as Active and designed for general-purpose applications requiring high-capacitance energy storage. The part is rated for 2000 hours at 85°C continuous operation with an operating temperature range of -40°C to 85°C. When higher voltage ratings or improved electrical characteristics are required within the same form factor and mounting configuration, substitute parts with compatible mechanical and electrical parameters become necessary.

Substiute Parts

DCM763U040DF2A

Cornell Dubilier Electronics (CDE)In Stock: 851DCM763U040DF2A Datasheet

Current PartRFQ

DCMC763U100DF2B

Cornell Dubilier Electronics (CDE)In Stock: 1095DCMC763U100DF2B Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DCM763U040DF2A is determined by strict adherence to the following parameters:

Critical Compatibility Parameters:

• Capacitance: 76000 µF (must match exactly)
• Polarization: Polar (must match)
• Package / Case: Radial, Can - Screw Terminals (must match)
• Lead Spacing: 1.250" (31.75mm) (must match)
• Size / Dimension: 3.000" Dia (76.20mm) (must match)
• Height - Seated (Max): 5.687" (144.45mm) (must match)
• Mounting Type: Chassis Mount (must match)

Parameters Allowing Variation:

• Voltage - Rated: Substitutes with higher voltage ratings are acceptable and provide enhanced reliability headroom
• Lifetime @ Temperature: Substitutes with equal or greater lifetime ratings are acceptable
• ESR (Equivalent Series Resistance): Substitutes with improved ESR characteristics are acceptable
• Series designation: May vary if other parameters remain compatible

The substitute DCMC763U100DF2B maintains all critical mechanical and electrical compatibility parameters while providing an upgraded voltage rating of 100 V and improved ESR characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the DCM763U040DF2A and DCMC763U100DF2B are Active products from Cornell Dubilier Electronics with full ROHS3 compliance and REACH unaffected status, making them acceptable for deployment in regulated applications. The DCMC763U100DF2B substitute provides a 100 V rated voltage compared to the 40 V rating of the original part, with identical mechanical form factor and mounting configuration.

Selection between these parts should be driven by circuit voltage requirements and design margins. The 40 V rated DCM763U040DF2A is suitable for applications operating at or below 40 V. The 100 V rated DCMC763U100DF2B is suitable for the same mechanical installation but provides higher voltage stress capability and is appropriate for systems requiring voltage safety margins or operating at higher potentials.

Both parts maintain identical capacitance (76000 µF), tolerance specifications (-10%, +75%), operating temperature range (-40°C to 85°C), and lifetime rating (2000 hours at 85°C). Both are packaged as radial, can-style aluminum electrolytic capacitors with screw terminals and identical physical dimensions.

Frequently Asked Questions (FAQ)

Can the DCMC763U100DF2B be directly substituted for the DCM763U040DF2A?

Yes, the DCMC763U100DF2B is a direct substitute in applications where mechanical fit and capacitance are primary requirements. All mounting parameters, lead spacing, and physical dimensions are identical. The higher voltage rating of the substitute part ensures compatibility with the original part's electrical operating range.

What are the mechanical differences between these parts?

There are no mechanical differences. Both parts feature identical lead spacing (1.250"), can diameter (3.000"), height (5.687"), and chassis mount configuration. Both are packaged as radial, can-style units with screw terminals.

Why would the higher voltage rated DCMC763U100DF2B be preferred?

The 100 V rated substitute provides enhanced voltage stress margin and improved reliability in applications with voltage transients or design uncertainty. It maintains the identical capacitance value and form factor while operating safely across voltage ranges from low levels up to 100 V.

Are there any compliance or certification differences?

No. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements.

Does the substitute part have different ripple current specifications?

The DCMC763U100DF2B provides specified ripple current ratings: 21.3 A @ 120 Hz and 22.365 A @ 10 kHz. The original DCM763U040DF2A does not specify ripple current values in the provided data. Applications with specific ripple current requirements should reference the DCMC763U100DF2B specifications.

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