CAP-55/440 Equivalent & Substitute Parts

Part Overview

The CAP-55/440 is a 55 µF, 440 V aluminum electrolytic capacitor with radial, can-style QC terminals manufactured by Hartland Controls/Littelfuse. This component is classified as a motor run capacitor within the HCK series and is designed for HVAC applications. The part is currently active in production with 1005 units in stock. Motor run capacitors are essential components in HVAC systems, providing continuous phase shifting and energy storage during compressor motor operation. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

CAP-55/440

Hartland Controls/LittelfuseIn Stock: 1053CAP-55/440 Datasheet

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CAP-55/440R

Hartland Controls/LittelfuseIn Stock: 915CAP-55/440R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CAP-55/440 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for a part to qualify as a direct substitute:

• Capacitance: 55 µF (exact match required)
• Voltage Rating: 440 V (exact match required)
• Tolerance: ±3% (exact match required)
• Lifetime @ Temperature: 60000 Hrs @ 70°C (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (exact match required)
• Polarization: Polar (exact match required)
• Package / Case: Radial, Can - QC Terminals (exact match required)
• Mounting Type: Chassis Mount (exact match required)
• Series Classification: HCK, Motor Run (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The CAP-55/440R meets all substitution criteria and is classified as a direct equivalent part within the same manufacturer family.

Parameter Comparison

Engineering Selection Recommendations

Both CAP-55/440 and CAP-55/440R are active production parts manufactured by Hartland Controls/Littelfuse with full ROHS3 compliance. Selection between these parts is based on inventory availability and procurement requirements rather than technical performance differences.

CAP-55/440 is recommended when primary inventory allocation is required, with 1005 units currently in stock.

CAP-55/440R is recommended as an alternative source when primary inventory is depleted, with 832 units currently in stock.

Both parts satisfy identical electrical specifications, thermal performance requirements, and environmental compliance standards for HVAC motor run applications. Interchangeability is complete across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can CAP-55/440R be used as a direct replacement for CAP-55/440 in HVAC motor run applications?

A: Yes. CAP-55/440R is a direct equivalent part with identical capacitance (55 µF), voltage rating (440 V), tolerance (±3%), thermal lifetime (60000 Hrs @ 70°C), operating temperature range (-40°C ~ 70°C), package configuration (Radial, Can - QC Terminals), and mounting type (Chassis Mount). Both parts are manufactured by Hartland Controls/Littelfuse within the HCK motor run series and carry ROHS3 compliance.

Q: Are there any physical or dimensional differences between CAP-55/440 and CAP-55/440R?

A: Both parts share identical package specifications (Radial, Can - QC Terminals) and mounting type (Chassis Mount). No dimensional variations are specified in the technical parameters.

Q: What is the difference between CAP-55/440 and CAP-55/440R part numbers?

A: The part numbers differ only in the suffix designation (standard versus "R" variant). This designation reflects internal manufacturer classification but does not indicate functional or performance differences. Both parts meet identical electrical and mechanical specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both CAP-55/440 and CAP-55/440R are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which part should be selected based on current inventory?

A: CAP-55/440 has 1005 units in stock, while CAP-55/440R has 832 units in stock. Selection should be based on procurement lead time requirements and inventory allocation policies. Both parts are active production items with equivalent availability status.