CD19FD391JO3F Equivalent & Substitute Parts

Part Overview

The CD19FD391JO3F is a 390 pF mica capacitor rated for 500 V operation in a radial through-hole configuration, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as active and suitable for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. Substitute parts are identified based on matching electrical specifications, mechanical dimensions, and mounting characteristics to ensure direct functional equivalence in circuit applications.

Substiute Parts

CD19FD391JO3F

Cornell Dubilier Electronics (CDE)In Stock: 983CD19FD391JO3F Datasheet

Current PartRFQ

CD19FD391JO3

Cornell Dubilier Electronics (CDE)In Stock: 1018CD19FD391JO3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD19FD391JO3F is determined by equivalence across the following critical parameters:

• Capacitance Value: 390 pF (exact match required)
• Tolerance: ±5% (defines acceptable capacitance range)
• Voltage Rating: 500 V (minimum rated voltage for safe operation)
• Dielectric Material: Mica (determines frequency response and stability characteristics)
• Mounting Configuration: Through-hole radial (ensures PCB compatibility)
• Lead Spacing: 0.343" (8.70 mm) (determines board layout compatibility)
• Physical Envelope: 0.642" L × 0.201" W × 0.512" H max (ensures mechanical fit in constrained spaces)
• Operating Temperature Range: -55°C to 125°C (defines thermal performance boundaries)

Substitute parts must match all electrical and mechanical parameters listed above to ensure direct functional replacement without circuit redesign or board rework.

Parameter Comparison

Engineering Selection Recommendations

Both the CD19FD391JO3F and CD19FD391JO3 are active products from the Cornell Dubilier Electronics CD19 series with identical electrical and mechanical specifications. Selection between these parts is determined by regulatory compliance requirements:

CD19FD391JO3F is ROHS3 compliant and REACH unaffected, making it suitable for applications subject to European Union environmental directives and RoHS regulations.

CD19FD391JO3 is RoHS non-compliant and REACH affected, restricting its use to applications where such compliance is not mandated or where legacy system maintenance permits non-compliant components.

For new designs and applications requiring regulatory compliance documentation, the CD19FD391JO3F is the appropriate selection. For legacy system replacement or applications without compliance requirements, the CD19FD391JO3 provides functional equivalence at potentially different cost or availability levels.

Frequently Asked Questions (FAQ)

Q: Can CD19FD391JO3 be used as a direct replacement for CD19FD391JO3F?

A: Both parts are electrically and mechanically identical with matching capacitance (390 pF), tolerance (±5%), voltage rating (500 V), dielectric material (mica), mounting type (through-hole radial), lead spacing (0.343"), and physical dimensions. Direct substitution is possible from a functional standpoint. Regulatory compliance differences (RoHS and REACH status) determine suitability based on application requirements.

Q: What are the critical parameters that must match for substitution?

A: Capacitance value, tolerance, voltage rating, dielectric material, mounting type, package configuration, lead spacing, and physical dimensions must all match exactly. Operating temperature range and series designation must also be identical.

Q: Are there any physical compatibility concerns when substituting between these parts?

A: No. Both parts share identical lead spacing (0.343" / 8.70 mm), physical dimensions (0.642" L × 0.201" W), and maximum seated height (0.512"). PCB footprints and mounting holes are directly compatible.

Q: What is the difference between the two part numbers?

A: The primary difference is regulatory compliance status. CD19FD391JO3F is ROHS3 compliant and REACH unaffected. CD19FD391JO3 is RoHS non-compliant and REACH affected. Electrical and mechanical specifications are identical.

Q: Which part should be selected for new designs?

A: CD19FD391JO3F is recommended for new designs due to ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory standards.