SPP-7E1250 Equivalent & Substitute Parts

Part Overview

The SPP-7E1250 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 1.25kA at 700V. This component is classified as obsolete, requiring a holder for installation. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system maintenance, repair, and continued operation in applications where this fuse type is specified.

Substiute Parts

SPP-7E1250

Eaton - Bussmann Electrical DivisionIn Stock: 774SPP-7E1250 Datasheet

Current PartRFQ

170M6666

Eaton - Bussmann Electrical DivisionIn Stock: 898170M6666 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPP-7E1250 is determined by the following critical electrical and mechanical parameters:

• Current Rating: 1.25kA (must match exactly)
• Voltage Rating: 700V AC (must match exactly)
• Manufacturer: Eaton - Bussmann Electrical Division (same manufacturer ensures design compatibility)
• Breaking Capacity: Minimum 200kA at rated voltage
• Compliance: REACH Unaffected and EAR99 classification maintained

The substitute part 170M6666 meets these criteria while offering an active product status and modern compliance certifications. The transition from blade-mount (fuse link) to bolt-mount (rectangular) represents a mechanical accommodation within the same electrical performance envelope, provided the installation infrastructure supports the alternative mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

The 170M6666 is the designated substitute for the obsolete SPP-7E1250 based on electrical equivalence (1.25kA, 700V) and manufacturer continuity. The substitute part carries active product status, ensuring long-term availability and supply chain stability. The 170M6666 holds multiple international certifications (CE, CSA, UR) and RoHS compliance, meeting modern regulatory requirements.

The primary consideration for substitution is the change in mounting configuration from blade-mount (fuse link requiring holder) to bolt-mount (rectangular). This mechanical difference requires verification that the installation infrastructure accommodates the alternative mounting method. Electrical performance and protection characteristics remain equivalent at the specified current and voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can the 170M6666 directly replace the SPP-7E1250 without modification?

A: Electrical substitution is valid; however, mechanical accommodation is required. The SPP-7E1250 uses blade-mount fuse link configuration, while the 170M6666 uses bolt-mount rectangular configuration. Installation infrastructure must support bolt-mount attachment.

Q: Are the current and voltage ratings identical between these parts?

A: Yes. Both parts are rated for 1.25kA at 700V AC, meeting the primary electrical substitution criteria.

Q: Why is the SPP-7E1250 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 170M6666 represents the active equivalent in the current product portfolio.

Q: What is the significance of the 200kA breaking capacity specification on the 170M6666?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt at rated voltage. The 170M6666 specification of 200kA at rated voltage ensures adequate protection performance in high-fault-current applications.

Q: Are there compliance differences between the two parts?

A: The 170M6666 carries CE, CSA, and UR certifications plus RoHS compliance. The SPP-7E1250 specifications do not list these certifications. Both maintain REACH Unaffected status.