SPP-6K400 Equivalent & Substitute Parts

Part Overview

The SPP-6K400 is a fuse link manufactured by Eaton - Bussmann Electrical Division, rated for 400A at 700V operation. This component is classified as obsolete and requires a holder for installation. Due to its obsolete status, identifying equivalent substitute parts is essential for system maintenance, repair, and continued operational support where original inventory is depleted or unavailable.

Substiute Parts

SPP-6K400

Eaton - Bussmann Electrical DivisionIn Stock: 847SPP-6K400 Datasheet

Current PartRFQ

170M5508

Eaton - Bussmann Electrical DivisionIn Stock: 767170M5508 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 170M5508 qualifies as an equivalent based on the following critical parameters:

• Current Rating: Both parts are rated for 400A operation
• Voltage Rating: Both parts are rated for 700V AC operation
• Mounting Type: Both require a holder for installation
• Manufacturer: Both are manufactured by Eaton - Bussmann Electrical Division
• Regulatory Classification: Both share identical ECCN (EAR99) and HTSUS (8536.10.0040) codes
• Moisture Sensitivity: Both maintain MSL 1 classification or equivalent non-applicable status

The primary difference is that 170M5508 is classified as active product status with additional specifications including square fuse type, rectangular blade package configuration, and documented breaking capacity of 200kA at rated voltage.

Parameter Comparison

Engineering Selection Recommendations

The 170M5508 is the designated substitute for SPP-6K400 based on electrical equivalence in current and voltage ratings. The substitute part offers the advantage of active product status, ensuring continued availability and supply chain support. Both components share identical regulatory classifications (ECCN and HTSUS codes), confirming compatibility within the same regulatory framework.

The 170M5508 provides documented breaking capacity (200kA) and melting I²t characteristics (11000), with CSA and UR approvals. These specifications support its use in applications previously served by the obsolete SPP-6K400, provided the mechanical form factor (rectangular blade configuration versus fuse link) is compatible with the existing holder assembly.

Frequently Asked Questions (FAQ)

Q: What makes 170M5508 a suitable substitute for SPP-6K400?

A: Both parts share identical electrical ratings (400A, 700V AC), mounting requirements (requires holder), and regulatory classifications (ECCN EAR99, HTSUS 8536.10.0040). The substitute is manufactured by the same supplier and is actively produced, addressing the obsolescence of the original part.

Q: Are there mechanical compatibility considerations between these parts?

A: Yes. SPP-6K400 is specified as a fuse link, while 170M5508 is a rectangular blade configuration. Both require a holder for installation. Verification that the existing holder assembly accommodates the rectangular blade form factor is necessary before substitution.

Q: What is the significance of the active product status of 170M5508?

A: Active product status indicates current manufacturing and availability. This ensures long-term supply chain reliability and support, contrasting with the obsolete SPP-6K400, which has limited or no remaining inventory beyond existing stock.

Q: Do both parts meet the same regulatory requirements?

A: Both parts share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications, confirming equivalent regulatory treatment. The 170M5508 carries documented CSA and UR approvals, providing additional certification documentation.

Q: What is the melting I²t value, and why is it relevant?

A: The melting I²t of 170M5508 is 11000. This parameter defines the thermal energy required to melt the fuse element and is critical for coordination with protective device systems. The SPP-6K400 does not provide this specification in available documentation.