MC18FD331J Equivalent & Substitute Parts

Part Overview

The MC18FD331J is a 330 pF mica capacitor rated for 500 V operation in a 1812 (4532 Metric) surface mount package. This component is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and production continuity. Mica capacitors in this specification are utilized in RF and high-Q applications requiring low-loss performance and stable capacitance across the operating temperature range of -55°C to 125°C.

Substiute Parts

MC18FD331J

Cornell Dubilier Electronics (CDE)In Stock: 974MC18FD331J Datasheet

Current PartRFQ

MC18FD331J-F

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

DirectRFQ

MCN18FD331J

Cornell Dubilier Electronics (CDE)In Stock: 928MCN18FD331J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MC18FD331J is determined by exact matching of the following electrical and mechanical parameters: capacitance value (330 pF), tolerance (±5%), rated voltage (500 V), dielectric material (Mica), operating temperature range (-55°C to 125°C), surface mount mounting type, and 1812 (4532 Metric) package. All substitute parts identified maintain these core parameters, ensuring functional and physical compatibility in circuit applications.

Substitute parts are categorized as follows:

Direct Manufacturer Substitute: MC18FD331J-F represents the direct equivalent with identical electrical specifications but differs in product status (Active versus Obsolete) and packaging format (Bulk).

Parametric Equivalent: MCN18FD331J shares identical electrical and mechanical specifications, with variation limited to the series designation (MCN versus MC) while maintaining Active product status.

Parameter Comparison

Engineering Selection Recommendations

Both MC18FD331J-F and MCN18FD331J are suitable substitutes for the obsolete MC18FD331J based on matched electrical and mechanical parameters. MC18FD331J-F carries ROHS3 compliance, whereas the original MC18FD331J is non-compliant. MCN18FD331J similarly maintains ROHS3 compliance. For applications requiring regulatory compliance with modern environmental standards, either active substitute is preferred. The choice between MC18FD331J-F and MCN18FD331J should be based on series compatibility requirements within the design platform and availability constraints, as both maintain identical parametric specifications and certification status.

Frequently Asked Questions (FAQ)

Q: Can MC18FD331J-F directly replace MC18FD331J?

A: Yes. MC18FD331J-F is electrically and mechanically equivalent, with identical capacitance (330 pF), tolerance (±5%), rated voltage (500 V), operating temperature range (-55°C to 125°C), and 1812 package dimensions. The primary distinction is product status and RoHS compliance.

Q: What is the difference between MC18FD331J-F and MCN18FD331J?

A: Both parts are parametrically equivalent with identical electrical specifications and package configuration. The MCN18FD331J represents an alternative series designation (MCN versus MC) while maintaining all critical parameters. Selection between these parts should be based on internal design platform requirements and inventory availability.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts maintain identical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) with a maximum seated height of 0.079" (2.00mm), ensuring direct physical compatibility in 1812 package footprints.

Q: What compliance differences exist between the main part and substitutes?

A: The original MC18FD331J is RoHS non-compliant, whereas both MC18FD331J-F and MCN18FD331J are ROHS3 compliant. All parts maintain identical REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Are these parts suitable for RF applications?

A: Yes. All three parts are specified with RF, High Q, and Low Loss characteristics, maintaining functional equivalence in RF and high-Q circuit applications across the -55°C to 125°C operating temperature range.