SCRN239R Film Capacitor Equivalent & Substitute Parts

Part Overview

The SCRN239R is a 20 µF film capacitor rated for 1000Vpk AC operation, manufactured by Cornell Dubilier Electronics (CDE). This component features a paper metallized dielectric in a radial, can-style package with threaded male termination, designed for chassis mount applications requiring a holder or bracket. The part is classified as obsolete, necessitating identification of active equivalent alternatives for continued system support and procurement.

Substiute Parts

SCRN239R

Cornell Dubilier Electronics (CDE)In Stock: 1153SCRN239R Datasheet

Current PartRFQ

SCRN239R-F

Cornell Dubilier Electronics (CDE)In Stock: 781SCRN239R-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRN239R is determined by strict equivalence across all electrical and mechanical parameters. The primary substitution criterion is functional compatibility, which requires matching capacitance value (20 µF), tolerance (±10%), voltage rating (1000Vpk AC), dielectric material (paper metallized), operating temperature range (-40°C ~ 80°C), package type (radial can), mounting configuration (chassis mount with holder/bracket), termination style (threaded male), and lead spacing (2.000" / 50.80mm).

The SCRN239R-F qualifies as a direct substitute based on identical electrical specifications and mechanical form factor. The key differentiator between the main part and its substitute is product status and regulatory compliance: the SCRN239R is obsolete, while the SCRN239R-F is active and RoHS3 compliant, making it the preferred selection for new designs and ongoing procurement.

Parameter Comparison

Engineering Selection Recommendations

The SCRN239R-F is the direct equivalent for the obsolete SCRN239R. Both parts are manufactured by Cornell Dubilier Electronics within the SCR series and share identical electrical and mechanical specifications. The SCRN239R-F is the preferred selection for the following reasons:

Product Status: The SCRN239R-F is active and currently in production, ensuring long-term availability and supply chain continuity. The SCRN239R is obsolete and subject to limited inventory availability.

Regulatory Compliance: The SCRN239R-F is RoHS3 compliant, meeting current environmental and material restriction requirements. The SCRN239R is RoHS non-compliant and may not satisfy procurement specifications for new designs or systems subject to regulatory compliance mandates.

Functional Equivalence: All electrical parameters (capacitance, tolerance, voltage rating, dielectric material, operating temperature range) and mechanical parameters (package type, mounting configuration, termination style, lead spacing, physical dimensions) are identical between the two parts, ensuring direct substitution without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can the SCRN239R-F be used as a direct replacement for the SCRN239R in existing designs?

A: Yes. The SCRN239R-F is electrically and mechanically identical to the SCRN239R. All electrical specifications (20 µF capacitance, ±10% tolerance, 1000Vpk AC rating, paper metallized dielectric, -40°C ~ 80°C operating range) and mechanical specifications (radial can package, chassis mount configuration, threaded male termination, 2.000" lead spacing, identical physical dimensions) are equivalent. Direct substitution is possible without circuit modification or board layout changes.

Q: What is the significance of the RoHS3 compliance difference between these parts?

A: The SCRN239R-F is RoHS3 compliant, indicating conformance to current Restriction of Hazardous Substances regulations. The SCRN239R is RoHS non-compliant. For systems or applications subject to RoHS compliance requirements, the SCRN239R-F must be used. For legacy systems without compliance mandates, either part may be used if electrical and mechanical requirements are met.

Q: Are the physical dimensions and mounting requirements identical?

A: Yes. Both parts have identical dimensions (4.560" L x 2.840" W with 5.190" seated height), identical lead spacing (2.000" / 50.80mm), and identical mounting requirements (chassis mount with holder/bracket). No mechanical redesign or bracket modification is required when substituting the SCRN239R-F for the SCRN239R.

Q: What applications are these capacitors designed for?

A: Both the SCRN239R and SCRN239R-F are designed for commutation, high frequency switching, and high pulse DV/DT applications. The 1000Vpk AC rating and paper metallized dielectric support these demanding electrical environments.

Q: Is the lead spacing compatible with standard component holders?

A: Both parts feature 2.000" (50.80mm) lead spacing and threaded male termination, requiring a chassis mount holder or bracket. The identical spacing and termination style ensure compatibility with existing mounting hardware and fixtures.