F520STLED300-GY Equivalent & Substitute Parts

Part Overview

The F520STLED300-GY is a 2-position disconnect terminal block connector manufactured by Eaton - Bussmann Electrical Division from the Magnum® F520 series. This component is designed for applications requiring fused disconnect capability with lever operation and integrated LED indication. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

F520STLED300-GY

Eaton - Bussmann Electrical DivisionIn Stock: 697F520STLED300-GY Datasheet

Current PartRFQ

41078.2

On Shore Technology Inc.In Stock: 109541078.2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F520STLED300-GY is determined by strict alignment with the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Number of Positions: 2
• Number of Levels: 1
• Type: Disconnect with Fuse and Lever operation
• Terminal Width: 8.0 mm
• Termination Style: Screw
• Current Rating: 6.3 A (both IEC and UL)
• Voltage Rating: Minimum 300 V (IEC and UL)
• Fuse Type: 5 mm × 20 mm
• Insulation Material: Polyamide (PA66), Nylon 6/6
• Wire Gauge Compatibility: Must accommodate 12-24 AWG range

Allowable Variations:

• Wire gauge range may differ if the substitute accommodates the required 12-24 AWG specification
• Voltage rating may exceed 300 V
• Color may differ from gray
• Stripping length may vary within acceptable installation tolerances
• Flammability rating may meet or exceed UL94 V-0

The substitute part 41078.2 from On Shore Technology Inc. meets these criteria and is classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The 41078.2 terminal block connector from On Shore Technology Inc. is a functional equivalent to the obsolete F520STLED300-GY. The substitute maintains all critical electrical parameters including 6.3 A current rating, 300 V UL voltage rating, and 5 mm × 20 mm fuse compatibility. Both components utilize identical insulation materials (Polyamide PA66, Nylon 6/6) and screw termination methodology.

The primary consideration for substitution is the wire gauge range limitation. The substitute part 41078.2 supports 12-22 AWG, whereas the original F520STLED300-GY accommodates 12-24 AWG. Applications utilizing 24 AWG conductors require evaluation of alternative solutions or confirmation that 22 AWG maximum wire gauge is acceptable for the intended circuit.

The substitute part is currently in active production status, ensuring availability and supply chain continuity. The IEC voltage rating of 400 V on the substitute exceeds the 300 V requirement, providing additional safety margin. Minor differences in color (beige versus gray) and stripping length (9 mm versus 10 mm) do not affect electrical or mechanical functionality.

Frequently Asked Questions (FAQ)

Q: Can 41078.2 directly replace F520STLED300-GY in all applications?

A: The 41078.2 is functionally equivalent for applications using wire gauges from 12-22 AWG. If your circuit requires 24 AWG conductor support, alternative solutions must be evaluated.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters are: 2-position disconnect configuration, 6.3 A current rating, 300 V minimum voltage rating (UL), fuse type (5 mm × 20 mm), screw termination, and support for the required wire gauge range. Both parts meet these specifications.

Q: Does the color difference between gray (original) and beige (substitute) affect performance?

A: Color is a cosmetic parameter and does not affect electrical or mechanical performance. Selection should be based on application requirements and panel aesthetics.

Q: Why is the original part obsolete?

A: The F520STLED300-GY is classified as obsolete by the manufacturer. The 41078.2 substitute from On Shore Technology Inc. provides equivalent functionality and is in active production.

Q: What is the significance of the 1 mm difference in stripping length?

A: The stripping length difference (10 mm original versus 9 mm substitute) is within acceptable installation tolerances and does not impact electrical performance or mechanical compatibility.

Q: Is the substitute part RoHS and REACH compliant?

A: The substitute part 41078.2 is ROHS3 compliant and REACH unaffected. Compliance documentation should be verified with the supplier for specific application requirements.

Q: Can the substitute handle higher voltage applications?

A: The substitute part 41078.2 has an IEC voltage rating of 400 V, exceeding the original 300 V specification. This provides additional voltage margin for applications operating at or below 300 V.