MC18FD241F-F Equivalent & Substitute Parts

Part Overview

The MC18FD241F-F is a 240 pF mica capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 500 V operation in a 1812 (4532 Metric) surface mount package. This component is classified as Active and is ROHS3 Compliant. Mica capacitors in this specification are utilized in RF applications requiring high Q factor and low loss characteristics across the operating temperature range of -55°C to 125°C. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed tolerance specifications for this product category.

Substiute Parts

MC18FD241F-F

Cornell Dubilier Electronics (CDE)In Stock: 759MC18FD241F-F Datasheet

Current PartRFQ

MC18FD241J-F

Cornell Dubilier Electronics (CDE)In Stock: 1106MC18FD241J-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MC18FD241F-F is based on the following criteria:

Electrical Parameters (Non-Negotiable):

• Capacitance value must be 240 pF
• Voltage rating must be 500 V or higher
• Dielectric material must be Mica
• Operating temperature range must encompass -55°C to 125°C

Mechanical Parameters (Non-Negotiable):

• Package must be 1812 (4532 Metric)
• Mounting type must be Surface Mount

Tolerance Consideration:

• The MC18FD241F-F specifies ±1% tolerance
• A substitute with ±5% tolerance (MC18FD241J-F) represents a relaxation of precision requirements
• This substitution is valid only when circuit design permits the wider tolerance band

Compliance Parameters:

• RoHS3 Compliant status must be maintained
• MSL rating of 1 (Unlimited) or better must be preserved

The MC18FD241J-F qualifies as a substitute because it maintains all non-negotiable electrical and mechanical parameters while operating under identical environmental and compliance conditions.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The MC18FD241F-F should be selected when circuit design specifications require a capacitance tolerance of ±1%. This tighter tolerance is appropriate for precision RF applications where component value accuracy directly impacts circuit performance.

Substitute Part Selection: The MC18FD241J-F is electrically and mechanically compatible with the MC18FD241F-F and may be selected when:

• Circuit design permits a capacitance tolerance of ±5%
• Cost optimization is a secondary design objective
• Availability of the primary part is constrained

Both parts maintain identical compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99 classification) and identical regulatory classifications (HTSUS 8532.29.0020). Both are classified as Active products with confirmed inventory availability.

The substitution is valid based on product status, compliance, and provided certifications. No additional technical criteria beyond those specified in the input parameters should be introduced into the selection decision.

Frequently Asked Questions (FAQ)

Q: Can MC18FD241J-F replace MC18FD241F-F in all applications?

A: MC18FD241J-F can replace MC18FD241F-F only when the circuit design tolerates a capacitance tolerance of ±5% instead of ±1%. The wider tolerance of the substitute part may affect circuit performance in precision-dependent applications. Verify circuit tolerance requirements before substitution.

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

A: The primary difference is capacitance tolerance. MC18FD241F-F specifies ±1% tolerance, while MC18FD241J-F specifies ±5% tolerance. All other electrical, mechanical, and compliance parameters are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1812 (4532 Metric) package with identical dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.079" (2.00mm). PCB footprints are interchangeable.

Q: Do both parts have the same voltage rating?

A: Yes. Both MC18FD241F-F and MC18FD241J-F are rated for 500 V operation. Voltage rating is not a differentiating factor between these parts.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Both carry the same HTSUS classification (8532.29.0020).

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

A: Both parts operate across the identical temperature range of -55°C to 125°C. Operating temperature is not a differentiating factor.

Q: Can MC18FD241F-F replace MC18FD241J-F?

A: Yes. MC18FD241F-F can replace MC18FD241J-F because the tighter ±1% tolerance of the primary part is compatible with applications designed for ±5% tolerance. This represents a performance upgrade rather than a substitution.

Q: What does MSL 1 (Unlimited) mean for handling?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture control during storage or handling. Both parts share this classification.