MC18FD101J Equivalent & Substitute Parts

Part Overview

The MC18FD101J is a 100 pF mica capacitor rated for 500 V operation in a 1812 (4532 Metric) surface mount package, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete and features RF-grade characteristics with high Q and low loss properties, making it suitable for high-frequency and precision applications requiring stable capacitance over temperature.

Due to its obsolete product status, locating direct inventory of the MC18FD101J may present supply chain challenges. Identifying equivalent and substitute parts ensures design continuity and project timeline adherence while maintaining electrical and mechanical compatibility with existing circuit designs.

Substiute Parts

MC18FD101J

Cornell Dubilier Electronics (CDE)In Stock: 1006MC18FD101J Datasheet

Current PartRFQ

MC18FD101J-F

Cornell Dubilier Electronics (CDE)In Stock: 983MC18FD101J-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC18FD101J is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 100 pF (exact match required)
• Tolerance: ±5% (defines acceptable capacitance variation)
• Voltage rating: 500 V (minimum acceptable rating for circuit operation)
• Dielectric material: Mica (determines frequency response, stability, and loss characteristics)

Mechanical Parameters:

• Package type: 1812 (4532 Metric) surface mount (ensures PCB footprint compatibility)
• Physical dimensions: 0.177" L × 0.126" W; Height 0.079" max (confirms assembly clearance)
• Mounting type: Surface mount (defines assembly process compatibility)

Environmental Parameters:

• Operating temperature range: -55°C to 125°C (defines thermal performance envelope)
• Moisture sensitivity: MSL 1 (Unlimited) (defines storage and handling requirements)

Substitute parts must match all parameters listed above. Deviations in any parameter render a part incompatible for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

MC18FD101J-F as Primary Substitute:

The MC18FD101J-F is a direct electrical and mechanical equivalent to the MC18FD101J. Both components are manufactured by Cornell Dubilier Electronics within the MC series and share identical electrical specifications, physical dimensions, and performance characteristics.

The MC18FD101J-F holds active product status, ensuring ongoing availability and supply chain reliability compared to the obsolete MC18FD101J. This substitution eliminates supply discontinuity risk for new production runs and design revisions.

Compliance Considerations:

The MC18FD101J-F carries ROHS3 compliance certification, whereas the MC18FD101J is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MC18FD101J-F satisfies compliance obligations. Both components maintain REACH Unaffected status and share identical ECCN (EAR99) and HTSUS (8532.29.0020) classifications.

Packaging Difference:

The MC18FD101J-F is supplied in bulk packaging, whereas the original MC18FD101J packaging format is not specified. This distinction affects procurement and inventory management but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can MC18FD101J-F replace MC18FD101J in existing circuit designs?

A: Yes. The MC18FD101J-F is electrically and mechanically equivalent to the MC18FD101J. All critical parameters—capacitance, tolerance, voltage rating, dielectric material, package type, physical dimensions, and operating temperature range—are identical. Direct substitution is valid for PCB assembly and circuit operation.

Q: What is the difference between MC18FD101J and MC18FD101J-F?

A: The primary differences are product status and regulatory compliance. The MC18FD101J is obsolete and RoHS non-compliant, while the MC18FD101J-F is active and ROHS3 compliant. Electrical and mechanical specifications are identical. The MC18FD101J-F is supplied in bulk packaging.

Q: Are there any PCB footprint compatibility issues when substituting MC18FD101J-F for MC18FD101J?

A: No. Both components use the 1812 (4532 Metric) surface mount package with identical physical dimensions (0.177" L × 0.126" W; 0.079" height max). PCB footprints, land patterns, and assembly clearances are fully compatible.

Q: Does the MC18FD101J-F meet RoHS requirements?

A: Yes. The MC18FD101J-F is ROHS3 compliant. If your application requires RoHS certification, the MC18FD101J-F satisfies this requirement, whereas the original MC18FD101J does not.

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

A: Both the MC18FD101J and MC18FD101J-F operate across -55°C to 125°C. This temperature range applies to all electrical and mechanical specifications.

Q: Are moisture sensitivity considerations different between these parts?

A: No. Both components carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage practices apply to both parts.

Q: Can I use MC18FD101J-F in high-frequency RF applications?

A: Yes. The MC18FD101J-F is specified with RF, High Q, and Low Loss features, making it suitable for high-frequency and precision RF circuit applications. These characteristics are identical to the original MC18FD101J.