MC18FD301F-TF Equivalent & Substitute Parts

Part Overview

The MC18FD301F-TF is a 300 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 allowable tolerance specifications for the application.

Substiute Parts

MC18FD301F-TF

Cornell Dubilier Electronics (CDE)In Stock: 1051MC18FD301F-TF Datasheet

Current PartRFQ

MC18FD301J-F

Cornell Dubilier Electronics (CDE)In Stock: 1281MC18FD301J-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC18FD301F-TF is permissible when the following parameters remain constant or within acceptable engineering limits:

Fixed Parameters (Must Match Exactly):

• Capacitance: 300 pF
• Voltage Rating: 500 V
• Dielectric Material: Mica
• Package / Case: 1812 (4532 Metric)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 125°C
• Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm)
• Height - Seated (Max): 0.079" (2.00mm)

Variable Parameter (Within Tolerance Specification):

• Tolerance: The MC18FD301F-TF specifies ±1% tolerance. Substitute parts with relaxed tolerance specifications (±5%) are acceptable when circuit design permits wider capacitance variation.

The MC18FD301J-F meets all fixed parameters and is classified as a substitute due to its identical electrical and mechanical specifications, with the exception of tolerance rating.

Parameter Comparison

Engineering Selection Recommendations

MC18FD301F-TF (Primary Selection): Select this part when circuit design requires the tighter ±1% tolerance specification. Both the main part and substitute are Active products with ROHS3 compliance and identical environmental certifications (REACH Unaffected, ECCN EAR99). The MC18FD301F-TF is suitable for precision RF applications where capacitance accuracy is a critical design parameter.

MC18FD301J-F (Substitute Selection): The MC18FD301J-F is electrically and mechanically interchangeable with the MC18FD301F-TF for applications where the relaxed ±5% tolerance specification is acceptable. Both parts share identical voltage rating, dielectric material, package configuration, and thermal operating range. Selection of the substitute part is based solely on tolerance requirements and circuit design specifications, not on performance or reliability considerations. Both parts maintain Active product status and full compliance with applicable regulations.

Frequently Asked Questions (FAQ)

Q: Can MC18FD301J-F replace MC18FD301F-TF in my circuit?

A: The MC18FD301J-F is a direct substitute if your circuit design permits ±5% capacitance tolerance. Both parts are identical in all other electrical and mechanical parameters, including voltage rating (500 V), capacitance value (300 pF), package size (1812), and operating temperature range (-55°C to 125°C).

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

A: The only difference is the tolerance specification. MC18FD301F-TF has ±1% tolerance, while MC18FD301J-F has ±5% tolerance. All other parameters—capacitance, voltage, dielectric material, package, dimensions, and thermal characteristics—are identical.

Q: Are both parts suitable for RF applications?

A: Both the MC18FD301F-TF and MC18FD301J-F are specified with RF, High Q, and Low Loss features. Selection between them depends on the tolerance requirement of your specific RF circuit design.

Q: Do these parts have the same physical dimensions?

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

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, REACH Unaffected, and classified under ECCN EAR99. Both maintain Moisture Sensitivity Level 1 (Unlimited) and are Active products from Cornell Dubilier Electronics.

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

A: Both the MC18FD301F-TF and MC18FD301J-F operate across -55°C to 125°C, providing identical thermal performance characteristics.