SPP-4H350 Equivalent & Substitute Parts

Part Overview

The SPP-4H350 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 350A at 700V operation. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The part operates as a fuse link requiring a separate holder for installation, serving critical overcurrent protection functions in electrical and industrial applications.

Substiute Parts

SPP-4H350

Eaton - Bussmann Electrical DivisionIn Stock: 1081SPP-4H350 Datasheet

Current PartRFQ

170M3768

Eaton - Bussmann Electrical DivisionIn Stock: 944170M3768 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 170M3768 qualifies as a functional equivalent based on the following critical parameters:

• Current Rating: Both parts rated at 350A
• Voltage Rating: Both parts rated at 700V AC
• Manufacturer: Same manufacturer (Eaton - Bussmann Electrical Division) ensures design compatibility and performance consistency
• Regulatory Classification: Identical ECCN (EAR99) and HTSUS codes (8536.10.0040)
• Compliance Status: 170M3768 is RoHS Compliant and holds active product status

The primary difference lies in mounting configuration: SPP-4H350 is a fuse link requiring external holder installation, while 170M3768 is a square bolt-mount fuse with integrated rectangular blade package. Both configurations serve identical electrical protection functions at the specified current and voltage ratings.

Parameter Comparison

Engineering Selection Recommendations

The 170M3768 is the designated equivalent for SPP-4H350 replacement applications. Selection is based on:

• Identical electrical ratings (350A, 700V AC) ensuring functional compatibility
• Same manufacturer origin providing design and performance parity
• Active product status enabling continuous procurement and supply chain reliability
• RoHS compliance status meeting current environmental and regulatory requirements
• Established certifications (CSA, UR) confirming safety and performance standards

Installation requires accommodation of the mounting configuration change from fuse link (requiring external holder) to bolt-mount square fuse. System integration must account for the physical dimensions (1.969" L x 1.772" W x 2.323" H) and bolt-mount interface requirements of the 170M3768.

Frequently Asked Questions (FAQ)

Q: Can SPP-4H350 and 170M3768 be used interchangeably in existing installations?

A: Both parts share identical electrical ratings (350A, 700V AC) and are manufactured by the same company. However, the mounting configuration differs: SPP-4H350 requires a separate fuse holder, while 170M3768 uses bolt-mount installation. Physical integration modifications may be necessary depending on the existing holder or mounting structure.

Q: What is the significance of the obsolete status for SPP-4H350?

A: Obsolete status indicates the part is no longer in active production. The 170M3768 is the active equivalent, ensuring future availability and supply chain continuity for new designs and replacement applications.

Q: Are there compliance differences between these parts?

A: Both parts share identical ECCN (EAR99) and HTSUS classifications (8536.10.0040). The 170M3768 carries RoHS compliance certification and CSA/UR approvals, meeting current regulatory standards.

Q: What does the 200kA breaking capacity specification mean for 170M3768?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt at rated voltage. The 170M3768 specification of 200kA at rated voltage confirms its capability to handle high-fault-current applications within the 700V AC system.

Q: How do the physical dimensions affect substitution?

A: The 170M3768 dimensions (1.969" L x 1.772" W x 2.323" H / 50.00mm x 45.00mm x 59.00mm) define the bolt-mount footprint. Installation requires verification that the mounting location accommodates these dimensions and the bolt-mount interface.