CD17FD391JO3 Equivalent & Substitute Parts

Part Overview

The CD17FD391JO3 is a 390 pF mica capacitor rated for 500 V operation in radial through-hole configuration, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Active product status and is designed for RF applications requiring high Q factor and low loss characteristics. Mica capacitors in this specification are essential in RF circuits, tuning networks, and high-frequency applications where stability and low dielectric loss are critical performance requirements. Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, compliance requirements, or specific application certifications.

Substiute Parts

CD17FD391JO3

Cornell Dubilier Electronics (CDE)In Stock: 967CD17FD391JO3 Datasheet

Current PartRFQ

CD17FD391JO3F

Cornell Dubilier Electronics (CDE)In Stock: 777CD17FD391JO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD17FD391JO3 is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 390 pF (exact match required)
• Tolerance: ±5% (defines acceptable capacitance range)
• Voltage Rating: 500 V (minimum operating voltage specification)
• Dielectric Material: Mica (determines electrical characteristics and stability)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Package Configuration: Radial (physical form factor and lead orientation)
• Lead Spacing: 0.232" (5.90mm) (PCB footprint compatibility)
• Operating Temperature Range: -55°C to 150°C (thermal performance envelope)
• Features: RF, High Q, Low Loss (application-specific performance criteria)

Substitute parts must match all parameters listed above. Deviations in any parameter render a part incompatible for direct substitution in applications requiring the CD17FD391JO3 specification.

Parameter Comparison

Engineering Selection Recommendations

The CD17FD391JO3F serves as a parametric equivalent to the CD17FD391JO3 with identical electrical and mechanical specifications. The primary distinction between these parts lies in regulatory compliance status:

CD17FD391JO3: RoHS non-compliant, REACH Affected. This variant is suitable for applications without RoHS or REACH compliance mandates, or for legacy system designs where compliance exemptions apply.

CD17FD391JO3F: ROHS3 Compliant, REACH Unaffected. This variant is required for applications subject to RoHS Directive 2011/65/EU (as amended by Directive 2015/863/EU) or REACH Regulation (EC) No 1907/2006. Selection of this variant ensures compliance with European Union environmental and chemical safety regulations.

Both parts are Active status products from Cornell Dubilier Electronics and maintain identical electrical performance, thermal characteristics, and physical form factors. Selection between these variants depends solely on the regulatory compliance requirements of the target application or end market.

Frequently Asked Questions (FAQ)

Q: Can CD17FD391JO3F replace CD17FD391JO3 in any application?

A: CD17FD391JO3F is electrically and mechanically identical to CD17FD391JO3. Substitution is valid from a functional standpoint. However, regulatory compliance requirements must be evaluated. If the application requires RoHS or REACH compliance, CD17FD391JO3F is the appropriate selection. If compliance is not required, either part is functionally equivalent.

Q: What does RoHS3 Compliant mean for the CD17FD391JO3F?

A: ROHS3 Compliant indicates conformance to Directive 2015/863/EU, which restricts the use of certain hazardous substances (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers) in electrical and electronic equipment. This certification is mandatory for products sold in the European Union and many other regulated markets.

Q: Are the physical dimensions identical between CD17FD391JO3 and CD17FD391JO3F?

A: Yes. Both parts share identical dimensions: 0.469" L x 0.209" W (11.90mm x 5.30mm), with maximum seated height of 0.390" (9.90mm), and lead spacing of 0.232" (5.90mm). PCB footprints and mechanical mounting are interchangeable.

Q: What is the significance of the "F" suffix in CD17FD391JO3F?

A: The "F" suffix denotes the ROHS3 Compliant variant within the CD17 series. This designation distinguishes the part from the non-compliant base version and indicates adherence to current environmental regulations.

Q: Can these capacitors be used in RF applications?

A: Yes. Both CD17FD391JO3 and CD17FD391JO3F are specified with RF, High Q, and Low Loss features, making them suitable for RF circuits, tuning networks, and high-frequency applications requiring low dielectric loss and stable capacitance.

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

A: Both parts operate across -55°C to 150°C. This wide temperature range supports applications in industrial, aerospace, and automotive environments subject to extreme thermal conditions.

Q: Is there an inventory difference between these parts?

A: Yes. CD17FD391JO3 has 896 pcs in stock, while CD17FD391JO3F has 683 pcs in stock. Availability may influence selection timing for procurement planning.