Circuit Breaker Thermal Magnetic 449-S-H-FN-500A

Part Overview

The 449-S-H-FN-500A is a thermal magnetic circuit breaker manufactured by E-T-A, rated for 500A at 28V DC with chassis mount configuration and push-to-reset actuation. This component is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure availability for new designs and field replacements.

Substiute Parts

449-S-H-FN-500A

E-T-AIn Stock: 1250449-S-H-FN-500A Datasheet

Current PartRFQ

449-K-H-FN-500A

E-T-AIn Stock: 1174449-K-H-FN-500A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 449-K-H-FN-500A qualifies as a direct substitute for the 449-S-H-FN-500A based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Current Rating: 500A (identical)
• Voltage Rating - DC: 28V (identical)
• Breaker Type: Thermal Magnetic (identical)
• Mounting Type: Chassis Mount (identical)
• Actuator Type: Push to Reset (identical)
• Number of Poles: 1 (identical)
• Approval Agency: CSA C22.2 No 235, UL1077 (identical)

The substitute part maintains all functional and regulatory requirements of the original component while offering active product status and current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The 449-K-H-FN-500A is the appropriate selection for applications currently specified with the 449-S-H-FN-500A. The substitute part maintains identical electrical specifications (500A, 28V DC), mechanical configuration (chassis mount, push-to-reset), and regulatory compliance (CSA C22.2 No 235, UL1077). The substitute part carries active product status, ensuring ongoing manufacturing support and supply availability. The substitute part additionally provides ROHS3 compliance and REACH unaffected status, meeting current environmental regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 449-K-H-FN-500A be used as a direct replacement for the 449-S-H-FN-500A?

A: Yes. Both parts are identical in current rating (500A), voltage rating (28V DC), breaker type (thermal magnetic), mounting configuration (chassis mount), and regulatory approvals (CSA C22.2 No 235, UL1077). The substitute part is functionally and mechanically interchangeable.

Q: What is the difference between the 449-S-H-FN-500A and 449-K-H-FN-500A?

A: The primary difference is product status. The 449-S-H-FN-500A is obsolete, while the 449-K-H-FN-500A is active. The substitute part additionally provides ROHS3 compliance and REACH unaffected status. All electrical and mechanical parameters are identical.

Q: Are there any compatibility concerns when substituting the 449-K-H-FN-500A for the 449-S-H-FN-500A?

A: No compatibility concerns exist. Both parts share identical specifications for current rating, voltage rating, mounting type, actuator type, number of poles, and regulatory approvals. Physical and electrical interfaces are equivalent.

Q: Does the substitute part meet the same regulatory standards?

A: Yes. The 449-K-H-FN-500A carries the same approval agencies as the original part: CSA C22.2 No 235 and UL1077. Both parts are classified under the same ECCN (EAR99) and HTSUS code (8536.20.0020).

Q: What is the inventory status of the substitute part?

A: The 449-K-H-FN-500A has 1103 pieces in stock as new original inventory, providing immediate availability for procurement and deployment.