SC-50 Ceramic Cartridge Fuse 50A 480VAC/300VDC Equivalent & Substitute Parts

Part Overview

The SC-50 is an active ceramic cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 50A at 480VAC and 300VDC. This slow-blow fuse cartridge requires a holder for installation and is designed for industrial electrical applications. The part is RoHS compliant and holds multiple international approvals including CE, CSA, and UL certification. Finding equivalent substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain operational flexibility across manufacturing and maintenance operations.

Substiute Parts

SC-50

Eaton - Bussmann Electrical DivisionIn Stock: 846SC-50 Datasheet

Current PartRFQ

0SLC050.T

Littelfuse Inc.In Stock: 9730SLC050.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC-50 is determined by the following critical parameters:

• Current Rating: Must match 50A exactly
• Voltage Rating - AC: Must match or exceed 480VAC
• Voltage Rating - DC: Must match or exceed 300VDC
• Fuse Type: Must be cartridge-based ceramic construction
• Mounting Type: Must require holder installation
• Breaking Capacity: Must meet or exceed 100kA AC and 10kA DC
• Physical Dimensions: Must be compatible with standard cartridge fuse holders
• Approval Certifications: Must maintain CE, CSA, and UL compliance

The substitute part 0SLC050.T from Littelfuse Inc. meets the primary electrical parameters (50A, 480VAC) and maintains required certifications. However, the DC voltage rating differs (170VDC vs. 300VDC), which represents a functional limitation in DC applications.

Parameter Comparison

Engineering Selection Recommendations

The 0SLC050.T from Littelfuse Inc. is a functionally compatible substitute for AC-dominant applications operating at 480VAC. Both parts maintain identical current ratings (50A), breaking capacity (100kA AC, 10kA DC), and international certifications (CE, CSA, UL). Physical dimensions are within acceptable tolerance for standard cartridge fuse holders.

Selection should be based on application voltage profile. For circuits operating exclusively or primarily at 480VAC with DC voltages not exceeding 170VDC, the 0SLC050.T provides equivalent protection. For applications requiring full 300VDC capability, the SC-50 remains the specified choice. The response time difference (slow blow vs. medium blow) must be evaluated against circuit inrush current characteristics and load protection requirements.

Both parts are active products with current manufacturing status and full RoHS compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 0SLC050.T replace the SC-50 in all applications?

A: The 0SLC050.T is suitable for 480VAC applications. However, if your circuit operates at DC voltages above 170VDC, the SC-50 is required. Verify your system's maximum DC voltage before substitution.

Q: What is the significance of the response time difference (slow blow vs. medium blow)?

A: Slow-blow fuses tolerate higher inrush currents before opening, while medium-blow fuses respond faster to overcurrent. Select based on your circuit's inrush current profile and protection requirements. Mismatched response characteristics may cause nuisance trips or inadequate fault protection.

Q: Are the physical dimensions interchangeable?

A: Yes. The SC-50 (0.410" Dia x 2.250" L) and 0SLC050.T (0.406" Dia x 2.252" L) are dimensionally compatible with standard non-standard cartridge fuse holders. Differences are within manufacturing tolerance.

Q: Do both parts meet the same regulatory certifications?

A: Both parts hold CE, CSA, and UL approvals. The 0SLC050.T additionally carries QPL (Qualified Products List) certification. Both are RoHS compliant, meeting current environmental standards.

Q: What should I verify before switching suppliers?

A: Confirm your application's maximum DC voltage requirement, inrush current profile, and holder compatibility. Verify that the substitute part's response time matches your circuit protection strategy. Review any equipment manufacturer specifications that may mandate specific fuse brands or series.