Description
Overview
The Eaton Bussmann 250NO9-660 is a bolted-type, BS88 Class gG low voltage fuse link rated at 250 amperes and 660/690V AC, part of the trusted Bussmann NO9 series. Built to BS88 Part 2 and IEC 60269-2 standards, it delivers an 80 kA breaking capacity suitable for protecting circuits in demanding industrial environments. CE marked and RoHS compliant, this fuse link is engineered for long-term reliability in switchgear panels, motor control centres, and distribution boards across a wide range of industries in India and globally.
Key Features
- 250A Current Rating — handles high load currents in industrial distribution and motor circuits without nuisance tripping
- 660/690V AC Voltage Rating — compatible with standard three-phase LV supply systems prevalent in Indian industrial installations
- 80 kA Breaking Capacity — provides robust fault current interruption, safeguarding downstream equipment and personnel
- Class gG Rating — full-range general-purpose fuse protection covering both overload and short-circuit conditions
- BS88 Part 2 / IEC 60269-2 Compliance — internationally recognised standard ensuring interchangeability and consistent performance
- Bolted Type with Centre Tag — secure mechanical connection reduces contact resistance and improves long-term reliability in vibration-prone environments
- B3 BS Size — fits standard B3 fuse carriers and fuse bases, simplifying replacement and system upgrades
- CE Marked & RoHS Compliant — meets European safety and environmental directives, accepted in export and EPC projects
- IEC Rated Certification — third-party validated performance for use in IEC-compliant electrical infrastructure
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 250NO9-660 |
| Series | Bussmann NO9 |
| Fuse Type | BS88 Low Voltage Fuse Link, Bolted Type |
| Tag Type | Centre Tag |
| BS Size | B3 |
| Amperage Rating | 250 A |
| Rated Voltage | 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 250NO9-660 is well suited for general-purpose overcurrent protection in low voltage systems operating at 660V or 690V AC. Typical installations include main incomer protection in distribution boards, feeder circuit protection in motor control centres, and branch circuit protection within LV switchgear assemblies. The Class gG designation means this fuse provides full-range protection — it handles sustained overloads progressively and clears short-circuit faults rapidly, making it appropriate wherever both overload and short-circuit protection are required from a single device.
The 80 kA breaking capacity places this fuse link among the higher-rated options for industrial sites with high prospective fault currents, such as substations, large manufacturing plants, and utility-connected panels. Engineers designing to IEC 60269-2 for projects in India and export markets will find the CE marking and IEC certification simplify approval processes. When selecting BS88 fuse links, always verify that the fuse carrier or fuse base is rated for B3 size and supports 660/690V AC at the required current rating.
In the Indian industrial context, the 250NO9-660 finds application in sectors including automotive manufacturing, textiles, steel processing, cement production, pharmaceuticals, and large commercial HVAC systems — wherever reliable LV distribution protection is non-negotiable. Panel builders and OEMs in Coimbatore and across Tamil Nadu frequently specify Class gG BS88 fuse links for both new installations and replacements in existing BS-standard switchgear.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — source genuine products directly from the authorised supply chain
- 100% genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery — we supply to customers across Tamil Nadu, Karnataka, Andhra Pradesh, Maharashtra, Gujarat, and all major industrial hubs
- WhatsApp technical support — quick guidance on fuse selection, sizing, and compatible accessories
- Bulk pricing available for panel builders, OEMs, EPCs, and contractors
Compatible Products & Accessories
- Eaton Bussmann BS88 B3 Fuse Carriers (bolted type, centre tag)
- Eaton Bussmann B3 Fuse Bases and Fuse Holders rated 660/690V AC
- Other Bussmann NO9 series fuse links in alternative current ratings (e.g., 200A, 315A, 400A)
- Eaton BS88 fuse switch disconnectors compatible with B3 size
- Busbars and fuse mounting kits for LV switchgear assemblies
- Eaton surge protection devices for LV distribution boards
Frequently Asked Questions
What does Class gG mean for the 250NO9-660 fuse link?
Class gG stands for general-purpose full-range fuse protection. The lowercase ‘g’ indicates the fuse is capable of breaking any current from the minimum fusing current up to its rated breaking capacity (80 kA in this case). The uppercase ‘G’ denotes general-purpose application, meaning it protects cables and circuits against both prolonged overloads and short-circuit fault currents. This makes the 250NO9-660 suitable for a wide range of LV distribution and motor circuit applications without needing separate overload and short-circuit protective devices.
Is the 250NO9-660 suitable for use on 415V three-phase systems in India?
Yes. The 250NO9-660 is rated at 660/690V AC, which means it is fully compatible with 415V three-phase systems (the standard industrial supply voltage in India). A fuse rated for a higher voltage than the system voltage is always acceptable; the voltage rating represents the maximum voltage the fuse can safely interrupt, not the operating voltage. You can use this fuse link on 415V, 440V, 500V, or 660/690V AC systems without any derating.
What fuse carrier or fuse base is compatible with the 250NO9-660?
The 250NO9-660 is a B3 BS size, bolted-type fuse link with a centre tag. It requires a BS88-compatible B3 fuse carrier or fuse base that supports bolted centre-tag connections and is rated for at least 250A at 660/690V AC. Always confirm the carrier’s current and voltage ratings match or exceed the fuse link ratings. Contact Shansen Enterprises for guidance on selecting the correct matching carrier for your panel design.
What is the breaking capacity of the 250NO9-660 and why does it matter?
The 250NO9-660 has an 80 kA breaking capacity, which is the maximum prospective fault current the fuse can safely interrupt without damage to the fuse or the surrounding equipment. In industrial installations connected close to transformers or busbar systems with high available fault currents, selecting a fuse with an adequate breaking capacity is critical for personnel safety and equipment protection. Always verify the prospective short-circuit current at the installation point does not exceed 80 kA when using this fuse link.
Does the 250NO9-660 comply with IEC standards applicable to Indian electrical projects?
Yes. The 250NO9-660 is manufactured to BS88 Part 2 and IEC 60269-2 standards, is IEC Rated certified, and carries CE marking along with RoHS compliance. IEC 60269 is widely accepted and referenced in Indian electrical engineering projects, EPC contracts, and export-oriented manufacturing facilities. The fuse meets Bureau of Indian Standards (BIS) referenced IEC norms for LV fuse links, making it straightforward to specify in project technical submittals and quality documentation.
How do I order the Eaton Bussmann 250NO9-660 from Shansen Enterprises?
Ordering is simple. You can reach Shansen Enterprises via WhatsApp or email using the contact buttons on this page — share your required quantity, delivery location, and any project details. Our team will respond promptly with availability, lead time, and a competitive price. We supply pan-India and offer bulk pricing for panel builders, OEMs, and EPC contractors. As an authorized Eaton channel partner in Coimbatore, we ensure you receive 100% genuine Bussmann products with full manufacturer warranty and proper documentation.
