SPP-4F300 Equivalent & Substitute Parts

Part Overview

The SPP-4F300 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 300A at 700V, designed for blade-type holder mounting. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component replacement in existing installations.

Substiute Parts

SPP-4F300

Eaton - Bussmann Electrical DivisionIn Stock: 1079SPP-4F300 Datasheet

Current PartRFQ

170M3717

Eaton - Bussmann Electrical DivisionIn Stock: 935170M3717 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPP-4F300 is based on the following critical parameters:

• Current Rating: 300A nominal capacity
• Voltage Rating: 700V AC operation
• Mounting Configuration: Holder-compatible design
• Manufacturer: Eaton - Bussmann Electrical Division (same manufacturer ensures design compatibility)
• Regulatory Compliance: REACH and ECCN alignment

The substitute part 170M3717 shares the same manufacturer and voltage rating (700VAC). While the current rating differs at 315A and the mounting type transitions from blade to bolt mount, this represents the active equivalent within the Eaton product line for high-current, high-voltage fuse applications.

Parameter Comparison

Engineering Selection Recommendations

The 170M3717 is the designated active substitute for the obsolete SPP-4F300. Selection of this alternative is supported by:

• Active product status ensuring ongoing availability and supply chain continuity
• Identical manufacturer (Eaton - Bussmann Electrical Division) guaranteeing design and performance alignment
• Matching voltage rating (700VAC) for direct electrical compatibility
• Current rating of 315A provides margin above the original 300A specification
• Regulatory compliance maintained through identical ECCN classification (EAR99)
• Documented breaking capacity (200kA) and melting I²t (7000) provide quantified performance metrics

Mounting configuration change from blade to bolt mount requires mechanical integration assessment within the target application.

Frequently Asked Questions (FAQ)

Q: Can the 170M3717 directly replace the SPP-4F300 without modification?

A: Electrical compatibility is confirmed through matching voltage rating and current capacity. Mechanical integration requires evaluation, as the mounting type changes from blade-type holder to bolt mount configuration.

Q: What is the significance of the current rating difference (300A vs. 315A)?

A: The 170M3717 at 315A exceeds the original 300A specification, providing operational margin. This is acceptable for direct substitution in applications where the circuit is designed for 300A operation.

Q: Why is the SPP-4F300 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 170M3717 represents the active equivalent within the current Eaton product portfolio.

Q: Are there compliance differences between these parts?

A: Both parts share identical ECCN classification (EAR99) and REACH status alignment, ensuring regulatory equivalence for export and use.

Q: What does the melting I²t value indicate?

A: The melting I²t of 7000 for the 170M3717 quantifies the thermal energy required to melt the fuse element, defining response characteristics under fault conditions.