CD42FD303FO3F Equivalent & Substitute Parts

Part Overview

The CD42FD303FO3F is a 0.03 µF mica capacitor rated for 500 V with ±1% tolerance, manufactured by Cornell Dubilier Electronics (CDE). This through-hole radial component is designed for general-purpose applications requiring stable capacitance and high voltage performance across the operating temperature range of -55°C to 125°C. The part is currently active in production with 908 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are maintained, allowing for component sourcing flexibility while preserving circuit performance.

Substiute Parts

CD42FD303FO3F

Cornell Dubilier Electronics (CDE)In Stock: 1006CD42FD303FO3F Datasheet

Current PartRFQ

CD42FD303FO3

Cornell Dubilier Electronics (CDE)In Stock: 635CD42FD303FO3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD42FD303FO3F is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Capacitance value (0.03 µF), tolerance (±1%), and rated voltage (500 V) must be identical. The mica dielectric material ensures stable performance across the specified temperature range.

Mechanical Parameters: Through-hole mounting type, radial package configuration, and lead spacing (1.063" / 27.00 mm) must match to ensure direct board-level compatibility without layout modifications.

Environmental Parameters: Operating temperature range (-55°C to 125°C) and general-purpose application classification define the functional envelope.

Substitute parts identified within the CD42 series maintain these specifications while potentially differing in compliance certifications or inventory status.

Parameter Comparison

Engineering Selection Recommendations

CD42FD303FO3F (Primary Selection): This part is ROHS3 compliant and REACH unaffected, making it suitable for applications subject to environmental regulations in the European Union and regions with equivalent compliance requirements. With 908 units in stock, this part provides superior availability for production schedules.

CD42FD303FO3 (Alternative Selection): This substitute part maintains identical electrical and mechanical specifications, ensuring functional equivalence in circuit applications. However, it is RoHS non-compliant and REACH affected. Selection of this part is appropriate only for applications where regulatory compliance is not a requirement or where legacy system maintenance permits non-compliant components. Inventory availability is lower at 625 units.

Both parts are active products within the CD42 series and share identical capacitance, voltage rating, tolerance, and physical dimensions, confirming direct substitutability at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can CD42FD303FO3 be used as a direct replacement for CD42FD303FO3F?

A: Yes, from an electrical and mechanical standpoint. Both parts have identical capacitance (0.03 µF), voltage rating (500 V), tolerance (±1%), lead spacing (1.063"), and physical dimensions. However, compliance status differs: CD42FD303FO3F is ROHS3 compliant and REACH unaffected, while CD42FD303FO3 is RoHS non-compliant and REACH affected. Selection depends on regulatory requirements for your application.

Q: What are the critical parameters that determine substitutability?

A: Substitutability is determined by: capacitance value (0.03 µF), tolerance (±1%), rated voltage (500 V), dielectric material (mica), operating temperature range (-55°C to 125°C), mounting type (through hole), package configuration (radial), and lead spacing (1.063" / 27.00 mm). All these parameters must match for direct substitution.

Q: Are there any physical installation differences between these parts?

A: No. Both parts have identical dimensions (1.441" L x 0.350" W) and maximum seated height (0.890"), with matching lead spacing of 1.063" (27.00 mm). They are mechanically interchangeable on PCBs designed for the CD42 radial package.

Q: What is the difference in compliance between the two parts?

A: CD42FD303FO3F is ROHS3 compliant and REACH unaffected, meeting current environmental regulations. CD42FD303FO3 is RoHS non-compliant and REACH affected, indicating it may contain restricted substances. Selection should align with your product's regulatory requirements.

Q: Which part should I select for new designs?

A: For new designs, CD42FD303FO3F is the recommended choice due to ROHS3 compliance and REACH unaffected status, ensuring compatibility with current and future environmental regulations. CD42FD303FO3 is suitable only for legacy applications or non-regulated environments.