Description
Overview
The Eaton Bussmann 50KO7-660 is a 50A, 660/690V AC Class gG BS88 bolted fuse link designed for general purpose protection in low voltage electrical installations. Part of Eaton’s trusted Bussmann KO7 series, it meets BS88 Part 2 and IEC 60269-2 standards and carries CE marking and RoHS compliance, making it suitable for both domestic and export panel builders across India. With an 80kA breaking capacity, it delivers high fault-current interruption performance in demanding industrial environments.
Key Features
- High Breaking Capacity — 80kA rating handles severe fault currents in industrial switchgear without risk of fuse body failure
- Class gG Characteristic — full-range general purpose fusing protects cables and equipment against both overloads and short circuits
- Bolted Type Construction — secure bolted connection ensures low contact resistance and reliable long-term performance in vibration-prone panels
- Closed Slot Tag Type — prevents incorrect fuse insertion, improving installation safety and reducing wiring errors
- BS Size A3 — standardised form factor for direct replacement into compatible A3 fuse bases and fuse carriers
- 660/690V AC Rating — suitable for use on both 660V and 690V AC distribution systems common in Indian industrial facilities
- CE Marked & RoHS Compliant — meets European directives and environmental regulations, supporting export-ready panel builds
- IEC 60269-2 Certified — independently verified performance to international standards, ensuring predictable protection coordination
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 50KO7-660 |
| Series | Bussmann KO7 |
| Fuse Type | BS88 Low Voltage Fuse Link, Bolted Type |
| BS Size | A3 |
| Tag Type | Closed Slot |
| Amperage Rating | 50 A |
| Voltage Rating (AC) | 660/690 V AC |
| Breaking Capacity | 80 kA |
| Fuse Class | Class gG |
| Standard | BS88 Part 2, IEC 60269-2 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated |
| Application | General purpose circuit protection, low voltage switchgear panels, motor control centres, distribution boards |
Applications & Selection Guide
The 50KO7-660 is well suited for general purpose overcurrent protection in low voltage switchgear panels, motor control centres (MCCs), and distribution boards operating at 660V or 690V AC. Its Class gG characteristic provides full-range protection, clearing both sustained overloads and high prospective short-circuit currents up to 80kA, making it appropriate for incoming feeder protection, busbar protection, and sub-distribution circuits in industrial plants.
In Indian industrial settings — including textile mills in Coimbatore, auto-component manufacturers in Pune, chemical process plants along the Gujarat coast, and heavy engineering facilities in the Chennai corridor — 690V AC distribution is increasingly common. The 50KO7-660’s dual voltage rating of 660/690V AC ensures it can be specified across legacy and modern systems without the need for derating. Panel builders should verify that the A3 bolted fuse base is correctly rated and that prospective short-circuit current at the installation point does not exceed 80kA.
When coordinating protection, pair Class gG fuses with downstream motor starters or MCBs to achieve selectivity. For motor branch circuits requiring back-up protection only, Class aM fuses may be more appropriate; consult the Eaton Bussmann selection guide or contact Shansen Enterprises for application-specific recommendations.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine product with full manufacturer traceability
- 100% genuine Eaton Bussmann products supplied with warranty and authentic documentation
- Pan-India delivery to all major cities and tier-2 industrial towns
- WhatsApp technical support for fuse selection, cross-referencing, and coordination queries
- Competitive bulk pricing for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann A3 Bolted Fuse Base / Fuse Carrier (BS88 compatible)
- Eaton Bussmann KO7 Series fuse links in alternate amperage ratings (e.g., 32A, 63A, 80A at 660V)
- Eaton BS88 Fuse Holders and Disconnectors for A3 size
- Eaton Low Voltage Switchgear and Motor Control Centre components
- Eaton Bussmann fuse puller tools for safe withdrawal of bolted fuse links
Frequently Asked Questions
What does Class gG mean for the Eaton Bussmann 50KO7-660?
Class gG denotes a general purpose, full-range fuse capable of clearing all overcurrents from the minimum fusing current up to the maximum breaking capacity. Unlike Class aM (motor protection) fuses that only interrupt short-circuit currents, a gG fuse such as the 50KO7-660 will also operate on sustained overload conditions, protecting cables, busbars, and connected equipment in distribution circuits.
Is the 50KO7-660 suitable for use on a 690V AC system in India?
Yes. The 50KO7-660 carries a dual voltage rating of 660/690V AC, so it is fully rated for operation on 690V AC systems without any derating. This makes it directly applicable to modern low voltage switchgear in Indian industrial facilities where 690V distribution is adopted for energy efficiency in motor-driven processes.
What is the breaking capacity of the Eaton Bussmann 50KO7-660 and why does it matter?
The 50KO7-660 has a breaking capacity of 80kA. This is the maximum prospective short-circuit current the fuse can safely interrupt without rupture or arc flash hazard. When specifying fuses, the breaking capacity must exceed the prospective fault current available at the point of installation — 80kA is sufficient for most LV switchgear applications in Indian industrial and commercial buildings connected to utility transformers up to several MVA.
Which fuse base or fuse carrier is compatible with the 50KO7-660?
The 50KO7-660 is a BS Size A3 bolted type fuse link with a closed slot tag. It requires a compatible A3-rated bolted fuse base or carrier designed for BS88 Part 2 fuse links. Eaton Bussmann supplies matching fuse bases for this size. Contact Shansen Enterprises to confirm the correct carrier part number for your specific enclosure or switchgear assembly.
Does the 50KO7-660 comply with RoHS and CE requirements for export panel builds?
Yes. The Eaton Bussmann 50KO7-660 is both CE Marked and RoHS Compliant, satisfying European Union requirements for low voltage electrical equipment and hazardous substance restrictions. Panel builders in India exporting assemblies to Europe or the Middle East can confidently use this fuse link in their declarations of conformity.
How do I order the Eaton Bussmann 50KO7-660 from Shansen Enterprises?
You can request a quote directly through Shansen Enterprises by clicking the WhatsApp button on this page or sending an email with your requirement — quantity, delivery location, and any project-specific details. As an authorized Eaton channel partner based in Coimbatore, Shansen Enterprises supplies genuine Eaton Bussmann products with pan-India delivery. Bulk orders for panel builders and OEMs receive priority pricing and fast dispatch.
