CD42FD503JO3 Equivalent & Substitute Parts

Part Overview

The CD42FD503JO3 is a 0.05 µF mica capacitor rated for 500 V with ±5% tolerance, manufactured by Cornell Dubilier Electronics (CDE). This through-hole radial component is classified as Active product status and is designed for general-purpose applications requiring stable capacitance and high voltage performance. Mica dielectrics provide excellent frequency stability and low loss characteristics across the operating temperature range of -55°C to 125°C.

Identification of equivalent and substitute parts becomes necessary when the primary part number reaches end-of-life status, inventory constraints occur, or when alternative compliance certifications are required for specific applications or regulatory jurisdictions.

Substiute Parts

CD42FD503JO3

Cornell Dubilier Electronics (CDE)In Stock: 719CD42FD503JO3 Datasheet

Current PartRFQ

CD42FD503JO3F

Cornell Dubilier Electronics (CDE)In Stock: 1214CD42FD503JO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CD42FD503JO3 is based on strict electrical and mechanical parameter matching within the CD42 series. The following parameters must align for a part to qualify as a direct substitute:

Mandatory Matching Parameters:

• Capacitance value: 0.05 µF (exact match required)
• Tolerance: ±5% (substitute tolerance must be equal or tighter)
• Voltage rating: 500 V (substitute must equal or exceed)
• Dielectric material: Mica (required for electrical performance equivalence)
• Mounting type: Through Hole (required for assembly compatibility)
• Package configuration: Radial (required for PCB footprint compatibility)
• Lead spacing: 1.063" / 27.00 mm (required for PCB hole alignment)
• Operating temperature range: -55°C to 125°C (required for environmental compatibility)

Compliance Variations Permitted: Substitute parts may differ in RoHS compliance status and REACH classification, as these are regulatory attributes that do not affect electrical or mechanical function. Product status must remain Active to ensure ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

CD42FD503JO3F as Direct Substitute:

The CD42FD503JO3F qualifies as a complete parametric equivalent to the CD42FD503JO3. All electrical specifications, mechanical dimensions, and performance characteristics are identical. Both parts are Active status products from the same manufacturer and series.

Compliance Considerations:

The CD42FD503JO3F provides enhanced regulatory compliance through ROHS3 certification and REACH Unaffected status, compared to the non-compliant and REACH Affected status of the CD42FD503JO3. Selection between these parts should be based on application regulatory requirements:

• Applications requiring RoHS3 compliance should specify CD42FD503JO3F
• Applications with no RoHS compliance requirement may use either part
• Applications subject to REACH regulations should prioritize CD42FD503JO3F

Inventory Availability:

CD42FD503JO3F maintains higher inventory levels (1104 pcs) compared to CD42FD503JO3 (669 pcs), providing improved supply chain reliability for high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can CD42FD503JO3F be used as a direct replacement for CD42FD503JO3 in existing designs?

A: Yes. The CD42FD503JO3F is a complete parametric equivalent. All electrical specifications (capacitance, tolerance, voltage rating, temperature range) and mechanical dimensions (lead spacing, package configuration, physical size) are identical. No design modifications are required.

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

A: The primary differences are regulatory compliance certifications. CD42FD503JO3F is ROHS3 compliant and REACH Unaffected, while CD42FD503JO3 is RoHS non-compliant and REACH Affected. Electrical and mechanical performance are identical.

Q: Will the CD42FD503JO3F fit the same PCB footprint as the CD42FD503JO3?

A: Yes. Both parts have identical lead spacing (1.063" / 27.00 mm), package configuration (radial through-hole), and physical dimensions (1.480" L x 0.469" W, height 0.921" max). PCB footprints are fully compatible.

Q: Are there any performance differences between these capacitors?

A: No. Both parts use mica dielectric material, operate across the same temperature range (-55°C to 125°C), and maintain identical capacitance (0.05 µF) and tolerance (±5%) specifications. Electrical performance is equivalent.

Q: Which part should be selected for new designs?

A: CD42FD503JO3F is recommended for new designs due to ROHS3 compliance and REACH Unaffected status, ensuring compatibility with current and future regulatory requirements. Both parts are Active status and available in stock.

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

A: Yes. Since all electrical and mechanical parameters are identical, CD42FD503JO3 and CD42FD503JO3F can be used interchangeably within the same assembly without functional impact. However, compliance documentation should reflect the specific part number used.