SPP-7H1250 Equivalent & Substitute Parts

Part Overview

The SPP-7H1250 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 1.25kA at 700V. This component is classified as obsolete and requires a holder for installation. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system maintenance, repair, and continued operation where original inventory is depleted.

Substiute Parts

SPP-7H1250

Eaton - Bussmann Electrical DivisionIn Stock: 985SPP-7H1250 Datasheet

Current PartRFQ

170M6766

Eaton - Bussmann Electrical DivisionIn Stock: 5263170M6766 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPP-7H1250 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)
• Mounting Configuration: Physical form factor must accommodate existing holder or installation infrastructure
• Regulatory Compliance: REACH and ECCN classifications must align with application requirements

The substitute part 170M6766 meets the electrical specifications (1.25kA, 700VAC) and is manufactured by the same supplier. However, the mounting type differs: the original requires a holder, while the substitute uses bolt mount configuration. This difference requires mechanical evaluation for installation compatibility.

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The 170M6766 substitute meets the core electrical requirements of the SPP-7H1250, with identical current rating (1.25kA) and voltage rating (700VAC). Both components share the same ECCN classification (EAR99) and HTSUS code (8536.10.0040), indicating regulatory alignment.

Product Status Consideration: The SPP-7H1250 is obsolete, while 170M6766 is active and maintains current inventory (5200 pcs available). This status difference supports the use of 170M6766 for ongoing system support.

Mechanical Installation: The primary distinction is mounting configuration. The original SPP-7H1250 requires a separate holder, while 170M6766 uses bolt mount. Installation feasibility depends on existing infrastructure and whether the bolt mount configuration can be accommodated in the application.

Compliance: Both components are classified as REACH Unaffected or not subject to REACH restrictions, and both carry EAR99 export classification, suitable for standard commercial applications.

Frequently Asked Questions (FAQ)

Q: Can 170M6766 directly replace SPP-7H1250 without modification?

A: Electrical substitution is valid based on matching current (1.25kA) and voltage (700VAC) ratings. However, mechanical installation requires evaluation. The SPP-7H1250 uses a holder-based mounting, while 170M6766 requires bolt mount installation. Physical compatibility with existing equipment must be confirmed before deployment.

Q: What are the critical parameters for fuse substitution?

A: Current rating and voltage rating are the primary electrical parameters that must match exactly. Mounting type and physical form factor are secondary parameters that determine installation feasibility. Both the original and substitute must be rated for the same application voltage and current to ensure proper protection.

Q: Why is the SPP-7H1250 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 170M6766 substitute is an active product with current manufacturing and inventory support, making it suitable for replacement in ongoing applications.

Q: Are there compliance differences between the two parts?

A: Both components share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications. Regulatory compliance is equivalent for standard commercial use.

Q: What is the breaking capacity difference?

A: The 170M6766 specifies a breaking capacity of 200kA at rated voltage. The SPP-7H1250 breaking capacity is not provided in available documentation. Breaking capacity indicates the maximum fault current the fuse can safely interrupt; this parameter should be evaluated against application requirements.