MC12FA221J Equivalent & Substitute Parts Reference

Part Overview

The MC12FA221J is a 220 pF mica capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 100 V operation in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete product status. 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.

The obsolete status of the MC12FA221J necessitates identification of equivalent substitute components that maintain identical electrical and mechanical parameters to ensure direct replacement capability in existing designs and production environments.

Substiute Parts

MC12FA221J

Cornell Dubilier Electronics (CDE)In Stock: 1013MC12FA221J Datasheet

Current PartRFQ

MC12FA221J-F

Cornell Dubilier Electronics (CDE)In Stock: 2979MC12FA221J-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the MC12FA221J are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match Exactly):

• Capacitance value: 220 pF
• Tolerance: ±5%
• Rated voltage: 100 V
• Dielectric material: Mica

Mechanical Parameters (Must Match Exactly):

• Package type: 1210 (3225 Metric)
• Mounting type: Surface Mount
• Physical dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Maximum seated height: 0.079" (2.00mm)

Performance Characteristics (Must Match):

• Operating temperature range: -55°C to 125°C
• Features: RF, High Q, Low Loss
• Moisture Sensitivity Level: 1 (Unlimited)

Components meeting all these parameters are classified as direct equivalents and may be substituted without circuit redesign or board layout modification.

Parameter Comparison

Engineering Selection Recommendations

The MC12FA221J-F is a direct electrical and mechanical equivalent to the MC12FA221J. Both components share identical capacitance, tolerance, voltage rating, dielectric material, operating temperature range, package type, and physical dimensions.

The primary distinction between these components is product status and regulatory compliance. The MC12FA221J is classified as obsolete, while the MC12FA221J-F maintains active product status from the manufacturer. The MC12FA221J-F additionally achieves ROHS3 compliance, whereas the MC12FA221J is RoHS non-compliant.

For new designs and production environments requiring compliance with current regulatory standards, the MC12FA221J-F is the appropriate selection. For legacy system maintenance where RoHS compliance is not a requirement, either component provides equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can MC12FA221J-F be used as a direct replacement for MC12FA221J in existing assemblies?

A: Yes. The MC12FA221J-F is electrically and mechanically identical to the MC12FA221J. All electrical parameters (capacitance, tolerance, voltage rating, temperature range) and mechanical parameters (package type, dimensions, height) are equivalent. Direct substitution is possible without circuit modification or board layout changes.

Q: What is the difference between MC12FA221J and MC12FA221J-F?

A: The components are electrically and mechanically identical. The primary differences are: (1) Product status—MC12FA221J is obsolete while MC12FA221J-F is active; (2) RoHS compliance—MC12FA221J-F is ROHS3 compliant while MC12FA221J is non-compliant; (3) Packaging format—MC12FA221J-F is supplied in bulk packaging.

Q: Are there any compatibility concerns when substituting MC12FA221J-F for MC12FA221J?

A: No compatibility concerns exist. Both components are 1210 (3225 Metric) surface mount packages with identical physical dimensions (0.126" L x 0.098" W, 3.20mm x 2.50mm) and maximum seated height (0.079" / 2.00mm). PCB footprints and assembly processes remain unchanged.

Q: What is the operating temperature range for these mica capacitors?

A: Both the MC12FA221J and MC12FA221J-F operate across the temperature range of -55°C to 125°C, suitable for industrial and RF applications requiring stable performance across extended temperature extremes.

Q: Are these components suitable for RF applications?

A: Yes. Both components are specified with RF, High Q, and Low Loss characteristics, making them appropriate for radio frequency circuit applications requiring minimal signal loss and high quality factor performance.

Q: What is the moisture sensitivity level (MSL) for these capacitors?

A: Both components have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly processes.