CD42FD303JO3 Mica Capacitor 0.03µF 500V Radial Equivalent & Substitute Parts

Part Overview

The CD42FD303JO3 is a 0.03 µF 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. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and address specific compliance or packaging requirements.

Substiute Parts

CD42FD303JO3

Cornell Dubilier Electronics (CDE)In Stock: 897CD42FD303JO3 Datasheet

Current PartRFQ

CD42FD303JO3F

Cornell Dubilier Electronics (CDE)In Stock: 785CD42FD303JO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD42FD303JO3 are identified based on strict electrical and mechanical parameter matching. The substitution logic is based on the following criteria:

Electrical Parameters (Non-Negotiable):

• Capacitance value: 0.03 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 (maintains electrical performance characteristics)

Mechanical Parameters (Non-Negotiable):

• Mounting type: Through Hole (ensures assembly compatibility)
• Package configuration: Radial (determines lead orientation and PCB placement)
• Lead spacing: 1.063" (27.00mm) (ensures footprint compatibility)

Environmental Parameters:

• Operating temperature range: -55°C to 125°C (substitute must support this range)

Manufacturer Consistency:

• Primary substitutes are sourced from Cornell Dubilier Electronics (CDE) to maintain design consistency within the CD42 series.

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

CD42FD303JO3 (Original Part Number):

• Use when RoHS non-compliance is acceptable or required by design specifications
• Use when REACH-affected material sourcing is permissible
• Current inventory: 789 pieces available

CD42FD303JO3F (Substitute Part Number):

• Use when ROHS3 compliance is required by end-product specifications or regulatory requirements
• Use when REACH-unaffected material sourcing is mandated
• Provides identical electrical and mechanical performance to the original part
• Current inventory: 678 pieces available

Both parts are active products from Cornell Dubilier Electronics and are electrically and mechanically interchangeable. Selection between them is determined solely by compliance requirements and regulatory constraints applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Are CD42FD303JO3 and CD42FD303JO3F electrically identical?

A: Yes. Both parts have identical capacitance (0.03 µF), tolerance (±5%), voltage rating (500 V), dielectric material (mica), and operating temperature range (-55°C to 125°C). They are parametric equivalents.

Q: Are these parts mechanically interchangeable?

A: Yes. Both parts share identical mounting type (through hole), package configuration (radial), lead spacing (1.063" / 27.00mm), and physical dimensions (1.441" L x 0.350" W / 36.60mm x 8.90mm). They are direct mechanical substitutes.

Q: What is the difference between CD42FD303JO3 and CD42FD303JO3F?

A: The primary differences are compliance certifications. CD42FD303JO3F is ROHS3 compliant and REACH unaffected, while CD42FD303JO3 is RoHS non-compliant and REACH affected. All electrical and mechanical parameters are identical.

Q: Which part should I select for a new design?

A: Selection depends on regulatory and compliance requirements for your end application. If ROHS3 compliance is required, use CD42FD303JO3F. If RoHS compliance is not a constraint, either part is suitable based on availability and supply chain considerations.

Q: Can I substitute CD42FD303JO3F for CD42FD303JO3 in an existing design?

A: Yes, provided that the design does not specifically require RoHS non-compliance or REACH-affected materials. The electrical and mechanical performance are identical.

Q: Are there any performance differences between these parts?

A: No. Both parts deliver identical electrical performance, frequency stability, temperature coefficient, and reliability characteristics across the -55°C to 125°C operating range.

Q: What is the lead spacing, and why is it important?

A: The lead spacing is 1.063" (27.00mm). This dimension is critical for PCB footprint compatibility. Both substitute parts maintain this spacing, ensuring direct PCB layout compatibility.

Q: Are both parts currently in stock?

A: Yes. CD42FD303JO3 has 789 pieces in stock, and CD42FD303JO3F has 678 pieces in stock. Both are available as new original components.