CD42FD253FO3 Equivalent & Substitute Parts

Part Overview

The CD42FD253FO3 is a 0.025 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 extended temperature ranges (-55°C to 125°C). The part is currently active in production. Identifying equivalent substitute parts is necessary when the original part number becomes unavailable or when compliance requirements differ between procurement cycles.

Substiute Parts

CD42FD253FO3

Cornell Dubilier Electronics (CDE)In Stock: 791CD42FD253FO3 Datasheet

Current PartRFQ

CD42FD253FO3F

Cornell Dubilier Electronics (CDE)In Stock: 980CD42FD253FO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD42FD253FO3 are identified based on strict electrical and mechanical parameter matching within the CD42 series. The substitution criteria are:

Electrical Parameters (Must Match Exactly):

• Capacitance: 0.025 µF
• Tolerance: ±1%
• Voltage Rating: 500 V
• Dielectric Material: Mica

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Through Hole
• Package Type: Radial
• Lead Spacing: 1.063" (27.00 mm)
• Physical Dimensions: 1.429" L × 0.331" W
• Height - Seated (Max): 0.882"

Functional Parameters (Must Match Exactly):

• Operating Temperature Range: -55°C to 125°C
• Application Class: General Purpose
• Series: CD42

The CD42FD253FO3F is classified as a parametric equivalent because it matches all electrical, mechanical, and functional specifications while differing only in regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

CD42FD253FO3 (Original Part):

• Select when RoHS non-compliant status is acceptable for the application
• Suitable for legacy designs or applications without RoHS requirements
• Current inventory: 726 pieces

CD42FD253FO3F (Substitute Part):

• Select when ROHS3 compliance is required
• Select when REACH unaffected status is required for supply chain compliance
• Provides identical electrical and mechanical performance to the original part
• Current inventory: 947 pieces

Both parts are manufactured by Cornell Dubilier Electronics and belong to the CD42 series. Selection between these parts depends solely on regulatory compliance requirements for the end application or procurement specification.

Frequently Asked Questions (FAQ)

Q: Are CD42FD253FO3 and CD42FD253FO3F electrically interchangeable?

A: Yes. Both parts have identical capacitance (0.025 µF), tolerance (±1%), voltage rating (500 V), and dielectric material (mica). They perform identically in circuit applications.

Q: Are these parts mechanically interchangeable?

A: Yes. Both parts have identical lead spacing (1.063" / 27.00 mm), physical dimensions (1.429" L × 0.331" W), and mounting type (through-hole radial). They fit the same PCB footprint without modification.

Q: What is the difference between CD42FD253FO3 and CD42FD253FO3F?

A: The primary differences are regulatory compliance certifications. CD42FD253FO3F is ROHS3 compliant and REACH unaffected, while CD42FD253FO3 is RoHS non-compliant and REACH affected. All electrical and mechanical specifications are identical.

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

A: Specify CD42FD253FO3F if your design or procurement requirements mandate ROHS3 compliance or REACH unaffected status. Specify CD42FD253FO3 only if your application explicitly permits RoHS non-compliant components.

Q: Can I use CD42FD253FO3F as a drop-in replacement for CD42FD253FO3?

A: Yes, from an electrical and mechanical standpoint. Verify that your procurement and regulatory requirements permit the substitution based on compliance status differences.

Q: Are there any temperature or voltage derating considerations between these parts?

A: No. Both parts operate across the identical temperature range (-55°C to 125°C) and share the same 500 V voltage rating. No derating adjustments are required when substituting between them.

Q: What is the lead spacing for these radial capacitors?

A: The lead spacing is 1.063 inches (27.00 mm) for both parts. This dimension is critical for PCB footprint compatibility.