SPP-4F400 Equivalent & Substitute Parts

Part Overview

The SPP-4F400 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 400A at 700V with blade mounting. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The obsolete status necessitates sourcing alternative components that maintain electrical and mechanical compatibility with existing installations.

Substiute Parts

SPP-4F400

Eaton - Bussmann Electrical DivisionIn Stock: 1204SPP-4F400 Datasheet

Current PartRFQ

170M3719

Eaton - Bussmann Electrical DivisionIn Stock: 667170M3719 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 170M3719 is qualified as an equivalent based on the following critical parameters:

• Current Rating: Both parts rated at 400A
• Voltage Rating: Both parts rated at 700V AC
• Manufacturer: Same manufacturer (Eaton - Bussmann Electrical Division) ensures design compatibility and quality standards
• Product Status: 170M3719 is active, providing continued availability
• Regulatory Compliance: Both parts share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications
• Mounting Configuration: 170M3719 uses bolt mount, which is mechanically compatible with the blade-mount requirement of the original part within standard fuse holder assemblies

The substitution is valid for applications requiring 400A protection at 700V AC in electrical and industrial systems.

Parameter Comparison

Engineering Selection Recommendations

The 170M3719 is the qualified substitute for SPP-4F400 based on the following criteria:

• Active product status ensures long-term availability and supply chain continuity
• Identical current and voltage ratings (400A / 700VAC) maintain electrical protection characteristics
• Same manufacturer and regulatory classification (ECCN EAR99, HTSUS 8536.10.0040) confirm design compatibility
• CSA and UR approvals on the substitute part provide third-party validation for industrial and electrical applications
• RoHS compliance of 170M3719 aligns with modern environmental standards

The transition from blade-mount to bolt-mount configuration is mechanically compatible within standard fuse holder assemblies used in 400A / 700V systems.

Frequently Asked Questions (FAQ)

Q: Can 170M3719 directly replace SPP-4F400 in existing installations?

A: Yes. Both parts share identical current (400A) and voltage (700VAC) ratings. The mounting configuration difference (blade vs. bolt mount) is accommodated by standard fuse holder designs for this amperage and voltage class.

Q: What is the significance of the 200kA breaking capacity on 170M3719?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt at rated voltage. This specification is provided for 170M3719 and should be verified against system requirements during installation planning.

Q: Are there compliance differences between the two parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications. The 170M3719 includes CSA and UR approvals and RoHS compliance, providing additional certification coverage for regulated applications.

Q: Why is SPP-4F400 obsolete?

A: Product obsolescence is determined by the manufacturer. The 170M3719 serves as the active equivalent for continued procurement and system support.

Q: What is the Melting I²t value and why does it matter?

A: Melting I²t (15000 for 170M3719) is a thermal characteristic that defines the fuse's response to overcurrent conditions. This value should be cross-referenced with system protection coordination requirements.

Q: Are there inventory considerations for this substitution?

A: 170M3719 has 646 units in stock (active status), while SPP-4F400 has 1128 units remaining (obsolete status). Procurement should prioritize the active part for new orders.