CM05FD391FO3

Part Overview

The CM05FD391FO3 is a 390 pF mica capacitor rated for 500 V operation in a radial through-hole package, manufactured by Cornell Dubilier Electronics (CDE). The part is currently active and available in production quantities. Alternative models may be required due to component availability, compliance requirements, or supply chain considerations.

Substiute Parts

CM05FD391FO3

Cornell Dubilier Electronics (CDE)In Stock: 854CM05FD391FO3 Datasheet

Current PartRFQ

CD15FD391FO3F

Cornell Dubilier Electronics (CDE)In Stock: 816CD15FD391FO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CM05FD391FO3 is evaluated based on strict electrical and mechanical compatibility criteria. The substitute part must maintain equivalence across the following key parameters:

• Capacitance: 390 pF (exact match required)
• Tolerance: ±1% (no degradation permitted)
• Voltage Rating: 500 V (minimum acceptable rating)
• Dielectric Material: Mica (required for performance characteristics)
• Operating Temperature Range: -55°C to 125°C (full coverage required)
• Mounting Type: Through Hole (assembly compatibility)
• Package / Case: Radial (form factor compatibility)
• Lead Spacing: 0.232" / 5.90 mm (PCB layout compatibility)
• Physical Dimensions: 0.469" L × 0.209" W; Height 0.390" (maximum seated)

The CD15FD391FO3F satisfies all substitution criteria with identical electrical specifications and mechanical interface parameters.

Parameter Comparison

Engineering Selection Recommendations

Both CM05FD391FO3 and CD15FD391FO3F are active products with identical electrical and mechanical specifications. The CD15FD391FO3F provides an additional compliance advantage with ROHS3 certification, whereas the CM05FD391FO3 is RoHS non-compliant. Selection between these parts should be determined by applicable regulatory requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Can the CD15FD391FO3F directly replace the CM05FD391FO3 in existing designs? Yes. All electrical parameters (capacitance, tolerance, voltage rating, temperature range) and mechanical parameters (lead spacing, package form factor, physical dimensions) are identical. Direct substitution on the PCB is possible without redesign.

What is the difference between these two mica capacitors? The primary difference is RoHS compliance status. The CM05FD391FO3 is RoHS non-compliant, while the CD15FD391FO3F is ROHS3 compliant. All functional electrical and mechanical specifications are equivalent.

Are there any temperature or voltage derating considerations when substituting? No. Both parts operate across the identical temperature range (-55°C to 125°C) and are rated for 500 V. No derating adjustments are required.

What mounting considerations apply to these radial mica capacitors? Both parts use standard through-hole radial mounting with 0.232" (5.90 mm) lead spacing. Physical dimensions are identical, ensuring compatibility with existing PCB layouts and component placement equipment.

Does MSL (Moisture Sensitivity Level) affect substitution? The CM05FD391FO3 specifies MSL 1 (unlimited), while the CD15FD391FO3F is not applicable for MSL. This does not present a constraint for substitution, as moisture sensitivity is not a limiting factor for either part in standard handling and storage conditions.