CD19FD391JO3 Mica Capacitor 390pF 500V Radial Equivalent & Substitute Parts

Part Overview

The CD19FD391JO3 is a 390 pF mica capacitor rated for 500 V with radial through-hole mounting, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as active and suitable for general-purpose applications requiring stable capacitance and high voltage performance. Mica dielectric capacitors are selected for applications demanding low loss, excellent frequency stability, and reliable operation across extended temperature ranges from -55°C to 125°C. Identification of equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and address specific compliance or packaging requirements.

Key Parameters

Parameter	Value
Capacitance	390 pF
Tolerance	±5%
Voltage - Rated	500 V
Dielectric Material	Mica
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package / Case	Radial
Lead Spacing	0.343" (8.70 mm)
Size / Dimension	0.642" L x 0.201" W (16.30 mm x 5.10 mm)
Height - Seated (Max)	0.512" (13.00 mm)
Series	CD19
Manufacturer	Cornell Dubilier Electronics (CDE)

Substitute Part Grouping Explanation

Substitution of the CD19FD391JO3 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 voltage specification for the application)
Dielectric Material: Mica (determines electrical characteristics and performance profile)
Mounting Type: Through Hole (PCB assembly compatibility)
Package Configuration: Radial (physical form factor and lead orientation)
Lead Spacing: 0.343" (8.70 mm) (PCB footprint compatibility)
Physical Dimensions: 0.642" L x 0.201" W x 0.512" H max (board layout and clearance requirements)
Operating Temperature Range: -55°C to 125°C (thermal performance envelope)

Substitute parts must match all parameters listed above. Variations in RoHS compliance status, REACH classification, or inventory levels do not affect functional equivalence but may influence procurement decisions based on regulatory requirements.

Parameter Comparison

Parameter	CD19FD391JO3	CD19FD391JO3F	Equivalence
Capacitance	390 pF	390 pF	Match
Tolerance	±5%	±5%	Match
Voltage - Rated	500 V	500 V	Match
Dielectric Material	Mica	Mica	Match
Operating Temperature	-55°C to 125°C	-55°C to 125°C	Match
Mounting Type	Through Hole	Through Hole	Match
Package / Case	Radial	Radial	Match
Lead Spacing	0.343" (8.70 mm)	0.343" (8.70 mm)	Match
Size / Dimension	0.642" L x 0.201" W (16.30 mm x 5.10 mm)	0.642" L x 0.201" W (16.30 mm x 5.10 mm)	Match
Height - Seated (Max)	0.512" (13.00 mm)	0.512" (13.00 mm)	Match
Series	CD19	CD19	Match
Product Status	Active	Active	Match
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Difference
REACH Status	REACH Affected	REACH Unaffected	Difference

Engineering Selection Recommendations

CD19FD391JO3F is a direct functional equivalent to CD19FD391JO3 across all electrical and mechanical parameters. Both components are active products from the same CD19 series manufactured by Cornell Dubilier Electronics.

Compliance Considerations:

The primary distinction between these parts is regulatory compliance status. CD19FD391JO3F is ROHS3 compliant and REACH unaffected, whereas CD19FD391JO3 is RoHS non-compliant and REACH affected. Selection between these equivalents should be based on the regulatory requirements of the end application and target market.

For applications subject to RoHS3 directives or REACH restrictions, CD19FD391JO3F is the appropriate selection. For applications without such regulatory constraints, either part may be selected based on availability and procurement considerations.

Both parts maintain identical electrical performance, thermal characteristics, and physical form factor, ensuring direct interchangeability at the circuit level.

Frequently Asked Questions (FAQ)

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

A: Yes. CD19FD391JO3F is a direct functional equivalent. All electrical parameters (capacitance, tolerance, voltage rating, temperature range) and mechanical parameters (mounting type, package configuration, lead spacing, physical dimensions) are identical. The components are interchangeable at the circuit and PCB assembly level.

Q: What is the difference between CD19FD391JO3 and CD19FD391JO3F?

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

Q: Are there any PCB layout considerations when substituting between these parts?

A: No. Both parts share identical lead spacing (0.343" / 8.70 mm), physical dimensions (0.642" L x 0.201" W), and radial package configuration. PCB footprints and mounting holes are directly compatible.

Q: Which part should be selected for new designs?

A: For new designs, CD19FD391JO3F is recommended due to ROHS3 compliance and REACH unaffected status, ensuring alignment with current regulatory standards and future supply chain requirements.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts are functionally equivalent and can be used interchangeably within the same assembly. However, documentation and traceability records should clearly identify which variant is used in each unit if regulatory compliance tracking is required.

Q: What is the operating temperature range for both parts?

A: Both CD19FD391JO3 and CD19FD391JO3F operate across -55°C to 125°C, providing consistent thermal performance across the full specified range.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message