F520STLED24-GY Equivalent & Substitute Parts

Part Overview

The F520STLED24-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 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.

Key Parameters

Parameter	Value
Manufacturer Part Number	F520STLED24-GY
Manufacturer	Eaton - Bussmann Electrical Division
Category	Terminal Blocks
Type	Disconnect
Number of Positions	2
Number of Levels	1
Disconnect Type	Fuse, Lever
Wire Gauge Range (AWG)	12-24 AWG
Wire Gauge Range (mm²)	0.5-4 mm²
Current Rating (IEC)	6.3 A
Voltage Rating (IEC)	300 V
Current Rating (UL)	6.3 A
Voltage Rating (UL)	300 V
Terminal Width	8.0 mm
Termination Style	Screw
Fuse Type	5 mm × 20 mm
Insulation Material	Polyamide (PA66), Nylon 6/6
Flammability Rating	UL94 V-0
Color	Gray
Features	LED
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the F520STLED24-GY is determined by the following critical parameters:

Electrical Ratings: Current and voltage ratings must meet or exceed the original specification (6.3 A IEC/UL, 300 V IEC/UL minimum)
Mechanical Configuration: 2-position, 1-level disconnect terminal block with fuse and lever disconnect type
Wire Gauge Compatibility: Wire gauge range must accommodate the original 12-24 AWG (0.5-4 mm²) specification
Terminal Geometry: Terminal width of 8.0 mm and screw termination style
Fuse Specification: 5 mm × 20 mm fuse type compatibility
Insulation Material: Polyamide (PA66) or equivalent material with UL94 V-0 flammability rating
Compliance: RoHS compliance status

The substitute part 41078.2 (On Shore Technology Inc., SRSI series) meets the core mechanical and electrical requirements for functional equivalence.

Parameter Comparison

Parameter	F520STLED24-GY (Main)	41078.2 (Substitute)
Manufacturer	Eaton - Bussmann	On Shore Technology Inc.
Series	Magnum® F520	SRSI
Product Status	Obsolete	Active
Type	Disconnect	Disconnect
Number of Positions	2	2
Number of Levels	1	1
Disconnect Type	Fuse, Lever	Fuse, Lever
Wire Gauge (AWG)	12-24 AWG	12-22 AWG
Wire Gauge (mm²)	0.5-4 mm²	0.2-4 mm²
Current Rating (IEC)	6.3 A	6.3 A
Voltage Rating (IEC)	300 V	400 V
Current Rating (UL)	6.3 A	6.3 A
Voltage Rating (UL)	300 V	300 V
Terminal Width	8.0 mm	8.0 mm
Termination Style	Screw	Screw
Fuse Type	5 mm × 20 mm	5 mm × 20 mm
Insulation Material	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6
Color	Gray	Beige
RoHS Status	RoHS Compliant	ROHS3 Compliant
Stripping Length	10 mm	9 mm

Engineering Selection Recommendations

The 41078.2 substitute part from On Shore Technology Inc. provides functional equivalence to the obsolete F520STLED24-GY based on the following factors:

Electrical Compatibility: Both parts maintain identical current ratings (6.3 A) across IEC and UL standards. The substitute provides enhanced voltage rating at 400 V IEC compared to the original 300 V, ensuring compatibility in applications operating at or below the original voltage specification.

Mechanical Compatibility: Both components feature identical 2-position, 1-level disconnect configuration with fuse and lever disconnect type. Terminal width (8.0 mm), screw termination, and 5 mm × 20 mm fuse type are matched, ensuring direct mechanical interchangeability in existing installations.

Material and Compliance: Both parts utilize Polyamide (PA66) insulation material. The substitute carries ROHS3 compliance, meeting current regulatory requirements. The original part's UL94 V-0 flammability rating is maintained through equivalent material specification.

Wire Gauge Consideration: The substitute accommodates 12-22 AWG, which covers the majority of the original 12-24 AWG range. Applications requiring 23-24 AWG termination should be evaluated for alternative solutions.

Availability: The substitute part is classified as active product status with documented inventory availability, addressing the obsolescence of the original component.

Frequently Asked Questions (FAQ)

Q: Can 41078.2 be used as a direct replacement for F520STLED24-GY in all applications?

A: The 41078.2 provides functional equivalence for applications using wire gauges within the 12-22 AWG range. Applications specifically requiring 23-24 AWG termination capability should be evaluated separately, as the substitute's maximum wire gauge is 22 AWG.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) wire gauge range (F520STLED24-GY supports 12-24 AWG; 41078.2 supports 12-22 AWG), (2) IEC voltage rating (300 V vs. 400 V), (3) color (Gray vs. Beige), and (4) stripping length (10 mm vs. 9 mm). Electrical current ratings and mechanical configuration remain identical.

Q: Does the color difference affect functionality?

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

Q: Is the substitute part RoHS compliant?

A: Yes, the 41078.2 is ROHS3 compliant, meeting current regulatory standards for restricted substances.

Q: What is the significance of the stripping length difference?

A: The stripping length (10 mm for F520STLED24-GY vs. 9 mm for 41078.2) indicates the recommended wire insulation removal length for proper termination. This minor difference should be accommodated in standard installation procedures.

Q: Can the substitute handle higher voltage applications?

A: The 41078.2 is rated for 400 V IEC, compared to 300 V for the original part. This higher rating provides additional margin in applications operating at the original 300 V specification but does not extend the part's use to applications exceeding its rated voltage.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message