MC18FD331J-T Equivalent & Substitute Parts

Part Overview

The MC18FD331J-T is a 330 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 obsolete product status. Mica capacitors in this specification are utilized in RF applications requiring high Q factor and low loss characteristics across the -55°C to 125°C operating temperature range.

Identification of equivalent and substitute parts is necessary due to the obsolete status of the MC18FD331J-T. Direct substitutes with identical electrical and mechanical parameters but active product status are available within the same CDE MC series, differing only in packaging configuration and compliance certifications.

Substiute Parts

MC18FD331J-T

Cornell Dubilier Electronics (CDE)In Stock: 1195MC18FD331J-T Datasheet

Current PartRFQ

MC18FD331J-F

Cornell Dubilier Electronics (CDE)In Stock: 1260MC18FD331J-F Datasheet

DirectRFQ

MC18FD331J-TF

Cornell Dubilier Electronics (CDE)In Stock: 881MC18FD331J-TF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MC18FD331J-T are determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish substitution validity:

Electrical Parameters (Must Match Exactly):

• Capacitance: 330 pF
• Tolerance: ±5%
• Voltage Rating: 500 V
• Dielectric Material: Mica

Mechanical Parameters (Must Match Exactly):

• Package / Case: 1812 (4532 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm)
• Height - Seated (Max): 0.079" (2.00mm)

Performance Characteristics (Must Match Exactly):

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

The identified substitutes differ from the main part only in packaging configuration (Bulk or Tape & Reel) and product status (Active vs. Obsolete), with improved RoHS3 compliance certification.

Parameter Comparison

Engineering Selection Recommendations

MC18FD331J-F (Bulk Packaging)

This substitute is suitable for applications where component procurement occurs in bulk quantities without automated assembly requirements. The part maintains full electrical and mechanical equivalence to the MC18FD331J-T while offering active product status and ROHS3 compliance certification. Selection of this variant is appropriate for manual assembly processes or inventory consolidation scenarios.

MC18FD331J-TF (Tape & Reel Packaging)

This substitute is the direct functional equivalent of the MC18FD331J-T, differing only in product status and compliance certification. The Tape & Reel packaging configuration maintains compatibility with automated pick-and-place assembly equipment. This variant is recommended for production environments utilizing standard surface mount assembly processes. The active product status ensures continued availability and supply chain stability.

Both substitutes provide ROHS3 compliance, addressing regulatory requirements that may not be met by the obsolete MC18FD331J-T variant. Selection between MC18FD331J-F and MC18FD331J-TF depends solely on assembly methodology and procurement volume requirements.

Frequently Asked Questions (FAQ)

Q: Can MC18FD331J-F and MC18FD331J-TF be used interchangeably with MC18FD331J-T?

A: Yes. All three parts are electrically and mechanically identical. They share the same 330 pF capacitance, ±5% tolerance, 500 V rating, mica dielectric, 1812 package dimensions, and operating temperature range. Substitution is valid from an engineering standpoint. The differences are packaging format (Bulk vs. Tape & Reel) and product status (Obsolete vs. Active).

Q: What is the difference between Bulk and Tape & Reel packaging?

A: Bulk packaging (MC18FD331J-F) supplies components loose or in trays, suitable for manual assembly or small-quantity applications. Tape & Reel packaging (MC18FD331J-TF) supplies components on continuous carrier tape wound on reels, designed for automated surface mount assembly equipment. Both contain identical components; packaging differs only in delivery and handling format.

Q: Why is the MC18FD331J-T marked as obsolete?

A: The MC18FD331J-T has been discontinued by the manufacturer. Active substitutes with identical specifications are available. Procurement of obsolete parts may face supply constraints or extended lead times.

Q: Does RoHS3 compliance affect electrical performance?

A: No. RoHS3 compliance is a regulatory certification indicating the component meets restrictions on hazardous substances. It does not alter electrical characteristics, capacitance value, voltage rating, or operating temperature range. The MC18FD331J-F and MC18FD331J-TF maintain identical electrical performance to the MC18FD331J-T.

Q: Are there any dimensional differences between these parts?

A: No. All three parts share identical physical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) with a maximum seated height of 0.079" (2.00mm). PCB footprint and assembly clearances are identical.

Q: Which substitute should be selected for new designs?

A: For new designs, either MC18FD331J-F or MC18FD331J-TF is appropriate based on assembly process requirements. MC18FD331J-TF is recommended for automated assembly environments. Both offer active product status and improved compliance certifications compared to the obsolete MC18FD331J-T.