MC22FF681D-F Equivalent & Substitute Parts

Part Overview

The MC22FF681D-F is a 680 pF mica capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 1 kV operation in a 2220 (5750 Metric) surface mount package. This component is designed for RF applications requiring high Q factor and low loss characteristics. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for this capacitor category.

Substiute Parts

MC22FF681D-F

Cornell Dubilier Electronics (CDE)In Stock: 1236MC22FF681D-F Datasheet

Current PartRFQ

MC22FF681J-F

Cornell Dubilier Electronics (CDE)In Stock: 1886MC22FF681J-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MC22FF681D-F is based on the following allowed parameters:

Matching Requirements (Non-Negotiable):

• Capacitance value: 680 pF (exact match)
• Voltage rating: 1 kV minimum
• Dielectric material: Mica
• Package / Case: 2220 (5750 Metric)
• Mounting type: Surface Mount
• Operating temperature range: -55°C ~ 125°C minimum

Allowable Variation:

• Tolerance: ±0.5% to ±5% (wider tolerance acceptable for substitution)
• Packaging format: Bulk or standard tape/reel acceptable

The MC22FF681J-F qualifies as a substitute part because it maintains identical capacitance, voltage rating, dielectric material, package, mounting type, and operating temperature range. The tolerance difference (±5% versus ±0.5%) represents a relaxation of the specification, making this part suitable for applications where the tighter tolerance of the original part is not required.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (MC22FF681D-F): Select the MC22FF681D-F when circuit design requires the tighter ±0.5% tolerance specification. This part is appropriate for precision RF tuning circuits, impedance matching networks, or applications where capacitance accuracy directly impacts frequency response or Q factor. The part maintains Active status with full RoHS3 compliance and REACH unaffected designation, confirming regulatory compliance for current manufacturing and deployment.

Substitute Part Selection (MC22FF681J-F): The MC22FF681J-F is electrically and mechanically interchangeable when the application tolerates ±5% capacitance variation. This substitute maintains identical voltage rating, dielectric material, package dimensions, and thermal operating range. Both parts are manufactured by the same supplier (CDE) within the same MC series, ensuring consistent RF performance characteristics (High Q, Low Loss). The substitute part is suitable for applications where tolerance relaxation does not compromise circuit function, such as general RF filtering, coupling, or bypass applications where the ±5% variation falls within acceptable circuit margins.

Compliance Verification: Both parts satisfy RoHS3 compliance requirements and REACH unaffected status, confirming suitability for current regulatory environments. MSL rating of 1 (Unlimited) indicates no moisture sensitivity restrictions for either part during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can MC22FF681J-F replace MC22FF681D-F in all applications?

A: The MC22FF681J-F is mechanically and electrically compatible with identical package, voltage rating, and dielectric material. However, the tolerance difference (±5% versus ±0.5%) means substitution is appropriate only when the application does not require the tighter tolerance specification. Review circuit design requirements to confirm whether ±5% capacitance variation is acceptable.

Q: What is the physical difference between these parts?

A: There is no physical difference. Both parts use the 2220 (5750 Metric) surface mount package with identical dimensions: 0.224" L x 0.197" W (5.70mm x 5.00mm) and maximum seated height of 0.157" (4.00mm). PCB footprints and assembly processes are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both MC22FF681D-F and MC22FF681J-F are ROHS3 compliant and REACH unaffected, confirming regulatory compliance for current manufacturing and deployment in regulated markets.

Q: What does the tolerance difference mean for circuit performance?

A: The MC22FF681D-F guarantees capacitance within ±0.5% of the 680 pF nominal value (range: 676.4 pF to 683.6 pF). The MC22FF681J-F guarantees capacitance within ±5% (range: 646 pF to 714 pF). In RF circuits where frequency response or impedance matching depends on precise capacitance, the tighter tolerance of the MC22FF681D-F is required. In general filtering or coupling applications, the ±5% tolerance of the MC22FF681J-F is typically acceptable.

Q: Can these parts be mixed in the same production batch?

A: Both parts are manufactured by Cornell Dubilier Electronics within the same MC series and share identical electrical and mechanical specifications except for tolerance. If circuit design permits ±5% capacitance variation, parts may be used interchangeably. If design requires ±0.5% tolerance, only the MC22FF681D-F should be used. Verify design documentation to confirm tolerance requirements before mixing parts in production.

Q: What is the MSL rating and why does it matter?

A: Both parts have MSL rating 1 (Unlimited), indicating no moisture sensitivity. These parts do not require special moisture control during storage, handling, or assembly, simplifying supply chain and manufacturing logistics.