Circuit Breaker Thermal Magnetic 447-S-H-FN-400A

Part Overview

The 447-S-H-FN-400A is a thermal magnetic circuit breaker manufactured by E-T-A, rated for 400A at 28V DC with chassis mount configuration and push-to-reset actuation. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and procurement planning. The substitute part maintains identical electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

447-S-H-FN-400A

E-T-AIn Stock: 804447-S-H-FN-400A Datasheet

Current PartRFQ

447-K-H-FN-SI-FA24-400A

E-T-AIn Stock: 1245447-K-H-FN-SI-FA24-400A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 447-K-H-FN-SI-FA24-400A qualifies as a direct substitute based on the following critical parameters:

• Identical current rating: 400A
• Identical voltage rating: 28V DC
• Identical breaker type: Thermal Magnetic
• Identical mounting configuration: Chassis Mount
• Identical actuator mechanism: Push to Reset
• Identical pole count: 1
• Identical regulatory approvals: CSA C22.2 No 235, UL1077
• Same manufacturer series: E-T-A 447

The substitute part differs only in product status (active versus obsolete) and packaging designation, with no variation in electrical or mechanical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 447-K-H-FN-SI-FA24-400A is the designated substitute for the obsolete 447-S-H-FN-400A. Both components carry identical regulatory certifications (CSA C22.2 No 235, UL1077) and maintain full electrical and mechanical compatibility. The substitute part is currently in active production status with confirmed inventory availability (1150 units), whereas the original part is obsolete with limited remaining stock (741 units). Selection of the active substitute part ensures long-term supply chain continuity and compliance with current manufacturing standards. The RoHS3 compliance and REACH unaffected status of the substitute part provide additional regulatory alignment for modern procurement requirements.

Frequently Asked Questions (FAQ)

Q: Are the 447-S-H-FN-400A and 447-K-H-FN-SI-FA24-400A electrically interchangeable?

A: Yes. Both components share identical electrical specifications: 400A current rating, 28V DC voltage rating, thermal magnetic operation, and single-pole configuration. They carry the same regulatory approvals and perform identically in circuit protection applications.

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

A: The primary differences are product status and packaging. The 447-S-H-FN-400A is obsolete, while the 447-K-H-FN-SI-FA24-400A is active production. The substitute includes RoHS3 compliance documentation and bulk packaging designation. All functional and mechanical parameters remain identical.

Q: Can I use the 447-K-H-FN-SI-FA24-400A as a direct replacement in existing designs?

A: Yes. The substitute part maintains identical mounting configuration (chassis mount), actuator type (push to reset), pole count, and regulatory certifications. No design modifications are required for substitution.

Q: Why should I transition from the obsolete part to the active substitute?

A: The obsolete part has limited remaining inventory and will eventually become unavailable. The active substitute ensures continued supply, maintains full compatibility, and provides current compliance certifications including RoHS3 status.

Q: Are there any packaging considerations when ordering the substitute?

A: The substitute part is supplied in bulk packaging, whereas the original part designation does not specify packaging type. Confirm bulk packaging compatibility with your receiving and storage procedures before procurement.