CM04FD121JO3 Equivalent & Substitute Parts

Part Overview

The CM04FD121JO3 is a 120 pF mica capacitor rated for 500 V operation in a radial through-hole package, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as a general-purpose mica capacitor suitable for applications requiring high voltage and stable capacitance characteristics across the operating temperature range of -55°C to 125°C. The part is currently active in production with 678 units available in inventory. Equivalent substitute parts are identified to address supply chain continuity, inventory optimization, or compliance requirements specific to end-use applications.

Substiute Parts

CM04FD121JO3

Cornell Dubilier Electronics (CDE)In Stock: 772CM04FD121JO3 Datasheet

Current PartRFQ

CD10FD121JO3F

Cornell Dubilier Electronics (CDE)In Stock: 767CD10FD121JO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CM04FD121JO3 is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 120 pF (exact match required)
• Tolerance: ±5% (exact match required)
• Voltage Rating: 500 V (exact match required)
• Dielectric Material: Mica (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Radial (exact match required)
• Lead Spacing: 0.142" (3.60 mm) (exact match required)
• Physical Dimensions: 0.382" L x 0.201" W, Height 0.350" max (exact match required)

The substitute part CD10FD121JO3F meets all electrical and mechanical parameters specified above. Both parts are manufactured by Cornell Dubilier Electronics and share identical functional specifications, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

CM04FD121JO3 is suitable for applications where RoHS non-compliance is acceptable and REACH-affected material usage is permitted. This part maintains active production status and has adequate inventory availability.

CD10FD121JO3F is the appropriate selection for applications requiring ROHS3 compliance and REACH-unaffected material composition. This substitute part provides identical electrical and mechanical performance while meeting enhanced environmental and regulatory standards. The CD10FD121JO3F also maintains active production status with higher inventory availability (735 units versus 678 units).

Both parts are functionally interchangeable from an electrical and mechanical standpoint. Selection between them should be based on regulatory compliance requirements specific to the end application and target market.

Frequently Asked Questions (FAQ)

Q: Can CM04FD121JO3 and CD10FD121JO3F be used interchangeably in circuit designs?

A: Yes. Both parts are electrically and mechanically identical, with matching capacitance (120 pF), tolerance (±5%), voltage rating (500 V), operating temperature range (-55°C to 125°C), and physical dimensions. They are direct substitutes for PCB layout and circuit functionality.

Q: What is the primary difference between these two parts?

A: The primary differences are regulatory compliance certifications. CD10FD121JO3F is ROHS3 compliant and REACH unaffected, while CM04FD121JO3 is RoHS non-compliant and REACH affected. Electrical and mechanical specifications are identical.

Q: Will the radial lead spacing remain the same if I substitute CM04FD121JO3 with CD10FD121JO3F?

A: Yes. Both parts have identical lead spacing of 0.142" (3.60 mm) and physical dimensions of 0.382" L x 0.201" W with a maximum seated height of 0.350" (8.90 mm). PCB footprints and through-hole drilling patterns are identical.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring ROHS3 compliance or REACH compliance, use CD10FD121JO3F. For applications without these regulatory constraints, either part is acceptable based on availability and supply chain considerations.

Q: Are both parts currently in production?

A: Yes. Both CM04FD121JO3 and CD10FD121JO3F maintain active production status with current inventory availability (678 and 735 units respectively).