SPP-4K400 Equivalent & Substitute Parts

Part Overview

The SPP-4K400 is a fuse link rated for 400A at 700V, manufactured by Eaton - Bussmann Electrical Division as part of the Semitron™ SPP series. This component requires a holder for installation and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system maintenance and component replacement in existing installations.

Substiute Parts

SPP-4K400

Eaton - Bussmann Electrical DivisionIn Stock: 1164SPP-4K400 Datasheet

Current PartRFQ

170M3519

Eaton - Bussmann Electrical DivisionIn Stock: 1187170M3519 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPP-4K400 is determined by the following critical parameters:

• Current Rating: 400A (must match exactly)
• Voltage Rating: 700V nominal (690V is acceptable within industrial fuse standards for equivalent protection)
• Mounting Type: Requires Holder (physical compatibility requirement)
• Manufacturer: Eaton - Bussmann Electrical Division (maintains design consistency and certification alignment)

The substitute part 170M3519 meets these criteria with a 400A rating at 690V, maintaining functional equivalence within standard industrial voltage tolerances. Both parts require holder mounting and are manufactured by the same supplier, ensuring compatibility with existing installation infrastructure.

Parameter Comparison

Engineering Selection Recommendations

The 170M3519 is the designated substitute for the obsolete SPP-4K400. Selection is based on:

• Current and Voltage Equivalence: Both parts are rated 400A with voltage ratings of 700V and 690V respectively, meeting functional requirements for the same circuit protection application.
• Product Status: The 170M3519 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity.
• Compliance Alignment: Both parts share identical ECCN (EAR99) and HTSUS classifications, maintaining regulatory consistency in procurement and deployment.
• Holder Compatibility: Both require holder mounting, preserving existing installation infrastructure without modification.

Frequently Asked Questions (FAQ)

Q: Can the 170M3519 directly replace the SPP-4K400 in existing installations?

A: Yes. Both parts are rated 400A and require holder mounting. The voltage difference (700V vs. 690V) is within acceptable industrial fuse standards for equivalent circuit protection. Physical dimensions of the 170M3519 (59.00mm L x 45.00mm W x 51.00mm H) must be verified for compatibility with the existing holder assembly.

Q: What is the significance of the "Fast Blow" response time on the 170M3519?

A: The 170M3519 is specified as Fast Blow, indicating rapid response to overcurrent conditions. This characteristic must be evaluated against the original circuit design requirements to ensure protection coordination with upstream and downstream devices.

Q: Why is the SPP-4K400 classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Eaton - Bussmann Electrical Division. The 170M3519 represents the active equivalent for new procurement and replacement applications.

Q: Are there compliance differences between the two parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications. The 170M3519 is RoHS Compliant, while the SPP-4K400 does not specify RoHS status. This difference does not affect functional substitution but may be relevant for environmental compliance requirements in specific applications.

Q: What holder types are compatible with these fuse links?

A: Both the SPP-4K400 and 170M3519 require holder assemblies designed for their respective form factors. The 170M3519's square fuse type and specified dimensions (59.00mm x 45.00mm x 51.00mm) must be matched to the appropriate holder to ensure proper electrical contact and mechanical retention.