SPP-7M450 Equivalent & Substitute Parts

Part Overview

The SPP-7M450 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 450A at 700V operation. This component is part of the Semitron™ SPP series and requires an external holder for installation. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance and component replacement in existing installations.

Substiute Parts

SPP-7M450

Eaton - Bussmann Electrical DivisionIn Stock: 1149SPP-7M450 Datasheet

Current PartRFQ

170M6558

Eaton - Bussmann Electrical DivisionIn Stock: 1070170M6558 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPP-7M450 is determined by the following critical parameters:

• Current Rating: 450A nominal capacity
• Voltage Rating: 700V maximum operating voltage
• Mounting Configuration: Requires external holder installation
• Regulatory Compliance: REACH and export classification alignment
• Product Availability: Active status for ongoing supply

The substitute part 170M6558 shares the same manufacturer (Eaton - Bussmann Electrical Division), identical mounting requirement (holder-dependent installation), equivalent voltage class (690V, within the 700V specification), and comparable current capacity (500A). Both components carry identical ECCN and HTSUS classifications, confirming regulatory equivalence for procurement and deployment purposes.

Parameter Comparison

Engineering Selection Recommendations

The 170M6558 is an active-status substitute for the obsolete SPP-7M450. Both components are manufactured by Eaton - Bussmann Electrical Division and share identical regulatory classifications (ECCN: EAR99, HTSUS: 8536.10.0040). The 170M6558 carries RoHS Compliance certification, providing enhanced environmental compliance for new installations or system upgrades.

The 170M6558 operates at 690V, which is within the 700V specification envelope of the original part. The current rating differential (500A versus 450A) represents a 50A increase, suitable for applications requiring equivalent or higher current protection. Both components require external holder mounting, ensuring mechanical compatibility with existing installation infrastructure.

Frequently Asked Questions (FAQ)

Q: Can the 170M6558 directly replace the SPP-7M450 in existing systems?

A: Yes. Both components require external holder mounting, operate within compatible voltage ranges (690V and 700V respectively), and are manufactured by the same supplier. Verify that the holder assembly is rated for the 500A current specification of the substitute part.

Q: What is the significance of the voltage difference between 700V and 690V?

A: The 170M6558 operates at 690V, which is 10V below the SPP-7M450 specification. This represents a 1.4% reduction and remains within standard industrial voltage tolerance ranges for three-phase systems operating at 690V nominal.

Q: Does the fuse type difference (Link versus Square) affect compatibility?

A: Fuse type refers to physical form factor. Both components require external holders. Verify that the holder assembly is compatible with the square form factor of the 170M6558 before installation.

Q: What does "Fast Blow" response time mean for the 170M6558?

A: Fast Blow indicates the fuse responds quickly to overcurrent conditions. This characteristic is suitable for circuits requiring rapid fault isolation. Confirm that the circuit protection scheme is compatible with fast-response fuse operation.

Q: Are there inventory considerations for component selection?

A: The SPP-7M450 has 1113 units in stock (obsolete status). The 170M6558 has 1048 units in stock (active status). For long-term system support, the active-status 170M6558 provides ongoing availability assurance.