CMR03C4R0DOCM Mica Capacitor Equivalent & Substitute Parts

Part Overview

The CMR03C4R0DOCM is a 4 pF mica capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 300 V operation in radial through-hole configuration. This component is classified as Active product status with full ROHS3 compliance and REACH unaffected designation. Mica capacitors in this specification range are utilized in precision RF circuits, timing networks, and high-reliability applications requiring stable capacitance across extended temperature ranges. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

CMR03C4R0DOCM

Cornell Dubilier Electronics (CDE)In Stock: 1090CMR03C4R0DOCM Datasheet

Current PartRFQ

CD5CC040DO3F

Cornell Dubilier Electronics (CDE)In Stock: 1356CD5CC040DO3F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMR03C4R0DOCM are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Capacitance value: 4 pF
• Capacitance tolerance: ±0.5 pF
• Voltage rating: 300 V minimum
• Dielectric material: Mica

Mechanical Compatibility Criteria:

• Mounting type: Through Hole
• Package configuration: Radial
• Lead spacing: 0.118" (3.00mm)
• Physical envelope: 0.272" L x 0.110" W (6.90mm x 2.80mm)
• Height seated maximum: 0.189" (4.80mm)

Environmental & Compliance Criteria:

• Operating temperature range: -55°C to 125°C
• RoHS3 compliance
• REACH unaffected status
• Moisture sensitivity level: 1 (Unlimited)

Substitute parts must satisfy all criteria within these parameter boundaries to ensure direct functional and mechanical interchangeability without circuit redesign or PCB modification.

Parameter Comparison

Engineering Selection Recommendations

The CD5CC040DO3F qualifies as a direct parametric equivalent to the CMR03C4R0DOCM based on complete alignment of all electrical, mechanical, and environmental specifications. Both components are manufactured by Cornell Dubilier Electronics and maintain identical performance characteristics across capacitance, voltage rating, tolerance, temperature range, and physical form factor.

Selection Basis:

Both parts carry Active product status, indicating current manufacturing availability and ongoing support. ROHS3 compliance and REACH unaffected designation are maintained across both components, satisfying regulatory requirements for industrial and commercial applications. The identical MSL rating of 1 (Unlimited) indicates equivalent moisture handling characteristics suitable for standard storage and assembly processes.

The difference in series designation (CMR versus CD5) reflects manufacturing lineage within the CDE product portfolio but does not impact functional or mechanical interchangeability. Both series employ mica dielectric technology with identical performance envelopes.

Selection between these parts should be based on inventory availability, lead time, and cost considerations, as no technical differentiation exists within the specified parameter set.

Frequently Asked Questions (FAQ)

Q: Can the CD5CC040DO3F be used as a direct replacement for the CMR03C4R0DOCM without circuit modification?

A: Yes. Both components share identical electrical specifications (4 pF, ±0.5 pF tolerance, 300 V rating), identical mechanical dimensions, lead spacing, and mounting configuration. Direct PCB substitution is supported without design changes.

Q: Are there differences in temperature stability between these two mica capacitors?

A: No. Both components operate across the identical temperature range of -55°C to 125°C with mica dielectric material, ensuring equivalent thermal performance characteristics.

Q: What is the significance of the different series designations (CMR versus CD5)?

A: Series designation reflects product line organization within Cornell Dubilier Electronics' manufacturing portfolio. The CMR and CD5 series represent different product generations or internal classifications but maintain identical performance parameters for this 4 pF, 300 V specification.

Q: Are both parts suitable for high-reliability applications?

A: Both components carry Active product status with ROHS3 compliance and REACH unaffected designation. MSL rating of 1 (Unlimited) indicates suitability for standard industrial and commercial applications. Specific high-reliability qualification requirements should be verified against application standards.

Q: Can these radial mica capacitors be used in automated assembly processes?

A: Yes. Both components feature standard through-hole radial configuration with 0.118" (3.00mm) lead spacing, compatible with conventional PCB assembly equipment and wave soldering processes.

Q: What inventory considerations apply to these substitute parts?

A: The CMR03C4R0DOCM maintains 983 pieces in stock, while the CD5CC040DO3F maintains 1252 pieces in stock. Both are available as new original components in bulk packaging.