SPP-4H225 Equivalent & Substitute Parts

Part Overview

The SPP-4H225 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 225A at 700V operation. 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 operational support where original inventory is depleted.

Substiute Parts

SPP-4H225

Eaton - Bussmann Electrical DivisionIn Stock: 1107SPP-4H225 Datasheet

Current PartRFQ

170M3766

Eaton - Bussmann Electrical DivisionIn Stock: 1213170M3766 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 170M3766 is identified based on the following substitution criteria:

• Voltage Rating Compatibility: Both parts operate at 700V AC, ensuring electrical system compatibility
• Manufacturer Continuity: Both parts are manufactured by Eaton - Bussmann Electrical Division, maintaining design and quality standards
• Regulatory Compliance: Both parts share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications
• Current Rating Consideration: The substitute part is rated at 250A, which exceeds the original 225A specification, providing operational margin in high-current applications

The 170M3766 differs in mounting configuration (bolt mount versus holder requirement) and fuse form factor (square versus link), requiring mechanical integration assessment during substitution.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SPP-4H225 is obsolete, while the 170M3766 is active. Active product status ensures continued availability, technical support, and manufacturing consistency.

Compliance & Certifications: The 170M3766 carries CSA and UR approvals with documented breaking capacity of 200kA at rated voltage and RoHS compliance, providing enhanced regulatory documentation compared to the obsolete SPP-4H225.

Electrical Compatibility: Both parts operate at 700V AC. The 170M3766's 250A rating exceeds the original 225A specification, maintaining protective function within the electrical system.

Mechanical Integration: Substitution requires assessment of mounting infrastructure. The SPP-4H225 uses a holder-based mounting system, while the 170M3766 employs bolt mount configuration. Physical installation compatibility must be evaluated based on existing equipment design.

Frequently Asked Questions (FAQ)

Q: Can the 170M3766 directly replace the SPP-4H225 in existing installations?

A: Electrical compatibility is established through matching 700V AC voltage ratings. However, mechanical compatibility requires verification. The SPP-4H225 uses a holder-based mounting system, while the 170M3766 uses bolt mount configuration. Installation feasibility depends on the specific equipment design and available mounting infrastructure.

Q: Why is the substitute part rated at 250A when the original is 225A?

A: The higher current rating of the 170M3766 (250A versus 225A) provides operational margin and does not compromise protective function. The fuse will still interrupt at the designed threshold for the protected circuit. This is a standard substitution approach in electrical component selection.

Q: What are the key parameters that determine substitution eligibility?

A: Voltage rating (700V AC), manufacturer continuity (Eaton - Bussmann Electrical Division), regulatory classification (ECCN EAR99, HTSUS 8536.10.0040), and current rating compatibility are the primary substitution criteria. Mounting type and form factor differences require mechanical assessment.

Q: Is the 170M3766 compliant with current regulatory standards?

A: Yes. The 170M3766 is RoHS compliant, carries CSA and UR approvals, and maintains the same ECCN and HTSUS classifications as the original SPP-4H225. It is an active product with current manufacturing support.

Q: What is the significance of the breaking capacity specification?

A: The 170M3766 specifies a breaking capacity of 200kA at rated voltage. This parameter defines the maximum fault current the fuse can safely interrupt. This specification is not provided for the obsolete SPP-4H225, making the 170M3766 a more fully documented alternative.