Circuit Breaker E-T-A 447-S-H-FN-225A Equivalent & Substitute Parts

Part Overview

The E-T-A 447-S-H-FN-225A is a thermal-magnetic circuit breaker rated for 225A at 28V DC, designed for chassis mount applications with push-to-reset actuation. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing. The substitute part maintains identical electrical and mechanical specifications while offering improved availability through active product status.

Substiute Parts

447-S-H-FN-225A

E-T-AIn Stock: 989447-S-H-FN-225A Datasheet

Current PartRFQ

447-K-H-FN-225A

E-T-AIn Stock: 1088447-K-H-FN-225A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The E-T-A 447-K-H-FN-225A qualifies as a direct substitute based on the following critical parameters that determine functional equivalence:

• Current Rating: Both parts rated at 225A
• Voltage Rating: Both rated at 28V DC
• Breaker Type: Both are thermal-magnetic designs
• Mounting Configuration: Both feature chassis mount installation
• Actuation Mechanism: Both employ push-to-reset actuation
• Pole Configuration: Both are single-pole designs
• Series Family: Both belong to the E-T-A 447 series
• Regulatory Compliance: Both carry identical approval certifications (CSA C22.2 No 235, UL1077)

The substitute part differs only in product status (active versus obsolete) and packaging configuration (bulk versus standard), neither of which affects electrical or mechanical performance in the application.

Parameter Comparison

Engineering Selection Recommendations

The E-T-A 447-K-H-FN-225A is the direct functional equivalent for the obsolete 447-S-H-FN-225A. Selection of the substitute part is based on:

• Regulatory Compliance: Both parts maintain identical certification status under CSA C22.2 No 235 and UL1077 standards, ensuring continued compliance in regulated applications.
• Product Availability: The substitute part carries active product status with confirmed inventory (1062 pcs), whereas the original part is obsolete.
• Environmental Compliance: The substitute part is ROHS3 compliant and REACH unaffected, meeting current environmental regulations.
• Electrical and Mechanical Compatibility: All critical parameters—current rating, voltage rating, mounting type, actuation mechanism, and pole configuration—are identical, ensuring direct interchangeability without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the 447-K-H-FN-225A be used as a direct replacement for the 447-S-H-FN-225A?

A: Yes. Both parts are identical in all electrical and mechanical specifications: 225A current rating, 28V DC voltage rating, thermal-magnetic operation, chassis mount configuration, and push-to-reset actuation. They carry the same regulatory certifications and are functionally interchangeable.

Q: What is the difference between the two part numbers?

A: The primary differences are product status and packaging. The 447-S-H-FN-225A is obsolete, while the 447-K-H-FN-225A is active. The substitute also specifies bulk packaging and includes ROHS3 compliance documentation. These differences do not affect performance or compatibility.

Q: Are there any compatibility concerns when substituting the 447-K-H-FN-225A for the 447-S-H-FN-225A?

A: No compatibility concerns exist. Both parts share identical mounting dimensions (chassis mount), identical electrical ratings (225A, 28V DC), and identical actuation type (push to reset). Installation and circuit integration remain unchanged.

Q: What certifications apply to both parts?

A: Both the 447-S-H-FN-225A and 447-K-H-FN-225A are certified under CSA C22.2 No 235 and UL1077, ensuring compliance with North American safety standards for circuit protection devices.

Q: Why is the original part listed as obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation decisions. The active substitute part (447-K-H-FN-225A) provides continued access to equivalent functionality with improved availability and current environmental compliance certifications.