Eaton 1BS103 Universal Fuse Block - 600 V, 400 A, 200 kAIC
Part Number: 1BS103
Quick Summary
The Eaton 1BS103 universal fuse block provides robust, modular electrical protection for large feeders in industrial control panels. Installers often struggle with crowded spaces, difficult wiring routes, and the need for quick, vibration-resistant terminations. RoHS compliant and rated for up to 600 V and 400 A with a 200 kAIC interrupt rating, it meets demanding safety and reliability requirements. Its modular design uses a set screw connection and stud mounting with tin-plated aluminum connectors and zinc-plated steel hardware, delivering low-resistance operation and easy expansion. For engineers prioritizing dependable protection, easy maintenance, and cost-efficient panel integration, the 1BS103 aligns with Bussmann's modular fuse block ecosystem and standard electrical cabinets. Consult the datasheet to confirm CE/UL approvals where required.
Product Information
Extended Description
1BS103 Eaton: Eaton Universal fuse block, Modular, 400 A, 150, Celsius, 150, Celsius, Set screw, 200 kAIC, Tin-plated aluminum connector, Zinc-plated steel studs/nut/washer, Molded black phenolic base, Stud, 600 V, #6-250 kcmil Cu/Al
Product Name
Eaton Bussmann series 1BS10x universal fuse block
Catalog Number
1BS103
UPC
051712135016
Product Length/Depth
2 in
Product Height
1 in
Product Width
1 in
Product Weight
0.023 lb
Warranty
Not Applicable
Compliances
Contact factory RoHS Compliant
Amperage Rating
400 A
Interrupt rating
200 kAIC
Voltage rating
600 V
Material
Molded black phenolic base Zinc-plated steel studs/nut/washer Tin-plated aluminum connector
Operating temperature - max
150 °C
Operating temperature - min
150 °C
Wire size
#6-250 kcmil Cu/Al
Connection
Set screw
Mounting method
Stud
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - 1BS103
Bussmann series 1BS103 modular fuse block data sheet no. 1208
Datasheet - FNQ-30
Feature: Modular, Bussmann-series fuse block design → Business Impact: Enables scalable protection and straightforward future expansions, reducing redesign costs as systems grow. Application: Industrial control panels and large feeders where future-proofing matters. Feature: 400 A amperage rating with a 200 kAIC interrupt rating → Business Impact: High fault tolerance minimizes downtime and fuse replacements in demanding applications. Application: Heavy-duty machinery and process lines requiring reliable interruption performance. Feature: 600 V rating and support for #6-250 kcmil Cu/Al wires → Business Impact: Broad wiring compatibility reduces need for adapters and stock variety, improving installation speed. Application: Large industrial power distributions and feeders. Feature: Set screw connection and stud mounting with tin-plated aluminum connector and zinc-plated steel hardware → Business Impact: Secure, vibration-resistant terminations that stay tight under harsh conditions, lowering maintenance visits. Application: Controllers and panels in vibration-prone environments. Feature: Molded black phenolic base and high-temperature capability (up to 150 °C) → Business Impact: Superior mechanical integrity in elevated-temperature environments, extending service life. Application: Enclosures in heat-intensive manufacturing lines. Feature: Compact footprint (2 in L, 1 in W, 1 in H) with RoHS compliance → Business Impact: Space-efficient protection modules that simplify cabinet layouts and regulatory compliance checks. Application: Dense control panels and modular rack systems.
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FAQs
The 1BS103 uses a stud mounting system with set screw terminals for each conductor, supporting #6-250 kcmil Cu/Al wires. Begin by securing the base to the panel stud hardware, route conductors to the tin-plated aluminum connector points, tighten set screws to spec, and verify a snug, vibration-resistant connection. Ensure the panel clearance accommodates the 2 in length and 1 in width footprint and observe the 150 °C operating limit during commissioning.
The 1BS103 provides a 200 kAIC interrupt rating, meaning it can safely interrupt high-energy faults without sustaining damage. This level of protection is crucial in large feeders and industrial machines where fault currents can be substantial. Coupled with a 400 A amperage rating and 600 V operating voltage, it supports robust protection for demanding panel applications.
Yes, the 1BS103 is RoHS compliant per factory notes. For other certifications such as CE or UL/CSA approvals, consult the official Eaton datasheets or contact the factory to confirm current status and applicability to your regional regulations and project requirements.
The fuse block accommodates wire sizes from #6 to 250 kcmil copper or aluminum. Terminations use the set screws on tin-plated aluminum connectors, with zinc-plated steel studs, nuts, and washers providing secure mounting. Ensure wire insulation is compatible with the 150 °C operating environment and verify torque specifications in the datasheet during installation.
The 1BS103 is ideal for large feeders and control-panel protection in industrial environments, machine automation, and heavy-duty power distribution. Its 600 V rating, 400 A capacity, and 200 kAIC interrupt rating offer strong protection with a compact footprint, making it competitive against similar modular fuse blocks by enabling easier panel layout, quicker maintenance, and long service life in vibration-prone settings.