Description
Overview
The Eaton Bussmann 125MO9-660 is a low-voltage BS88 Type bolted fuse link from the Bussmann MO9 series, rated at 125 A and 660/690 V AC with an 80 kA breaking capacity. Conforming to BS88 Part 2 and IEC 60269-2, it is built for Class gG general-purpose protection, making it well suited to safeguard cables, busbars, and downstream equipment in industrial panels throughout India. Its centre-tag bolted construction ensures secure, low-resistance connections in B2-size fuse bases.
Key Features
- 125 A Current Rating — handles full-load currents in medium-duty industrial circuits without nuisance tripping
- 660/690 V AC Rated Voltage — suitable for standard three-phase LV distribution systems common across Indian industries
- 80 kA Breaking Capacity — provides robust short-circuit protection even on high-fault-level busbars
- Class gG Fuse — full-range protection covering both overload and short-circuit conditions in one device
- BS88 Part 2 / IEC 60269-2 Compliance — internationally recognised standard ensuring interchangeability and proven performance
- Bolted Centre-Tag Construction (BS Size B2) — positive mechanical contact, vibration-resistant termination for panel-builder confidence
- CE Marked & RoHS Compliant — meets European directives; supports green manufacturing and export-oriented panel builds
- IEC Certified — independently verified ratings for use in safety-critical electrical installations
- Bussmann MO9 Series — field-proven product family widely stocked and supported in India
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 125MO9-660 |
| Series | Bussmann MO9 |
| Product Type | BS88 Type Fuse Link, Bolted Type |
| BS Size | B2 |
| Tag Type | Centre Tag |
| Amperage Rating | 125 A |
| Rated Voltage (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 125MO9-660 is the preferred choice wherever a 125 A general-purpose fuse is required on 660/690 V AC three-phase systems. Typical installations include main incomer protection in distribution boards, feeder protection in motor control centres (MCCs), and busbar protection in low-voltage switchgear assemblies. Panel builders across Coimbatore’s textile and engineering sectors regularly specify this size for 55–75 kW motor feeder circuits and outgoing cable protection up to 70 mm².
As a Class gG device, the 125MO9-660 provides full-range overcurrent protection — it clears both sustained overloads and bolted short-circuit faults. This makes it appropriate where a single protective device must cover the entire current range from minimum fusing current up to the 80 kA breaking capacity. Engineers should verify that the fuse-base or fuse-switch-disconnector is rated for B2 bolted centre-tag links at 660/690 V before installation.
In the Indian industrial context, this fuse link finds application in automotive component manufacturing plants, chemical process industries, steel re-rolling mills, textile spinning units, and commercial building main distribution boards — anywhere IEC 60269-2 compliance is mandated by the electrical consultant or factory inspectorate. Its CE and RoHS credentials also support OEM panel builders who export to European markets.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — direct supply chain, genuine product guarantee
- 100% genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery — Coimbatore, Chennai, Bangalore, Mumbai, Pune, Hyderabad, and beyond
- WhatsApp technical support for application selection and sizing queries
- Bulk and project pricing available for panel builders, EPCs, and OEMs
Compatible Products & Accessories
- BS88 B2 Bolted Fuse Bases and Fuse Carriers (centre-tag, 660/690 V rated)
- Eaton Bussmann BS88 Fuse Switch Disconnectors (B2 size)
- Eaton Bussmann MO9 Series Fuse Links in adjacent ratings (100 A, 160 A) for co-ordination studies
- Eaton Bussmann BS88 HRC Fuse Links — Class gM variants for motor protection co-ordination
- DIN rail and panel-mount fuse holders compatible with B2 centre-tag links
- Phase barriers and shrouds for BS88 bolted fuse assemblies
Frequently Asked Questions
What does Class gG mean for the 125MO9-660 fuse link?
Class gG (general purpose, general application) means the fuse provides full-range overcurrent protection — it is capable of breaking any current that causes it to operate, from the minimum fusing current (typically 1.6× rated current) right up to its maximum rated breaking capacity of 80 kA. Unlike Class aM fuses that protect only against short circuits, a gG fuse also protects against sustained overloads, making it suitable for cable and general circuit protection in distribution boards and switchgear panels.
Is the 125MO9-660 suitable for motor protection in India?
The 125MO9-660 is a Class gG general-purpose fuse, which can provide back-up short-circuit protection for motors. However, for dedicated motor branch-circuit protection — particularly where high starting currents must be tolerated without blowing — a Class gM or aM fuse is typically more appropriate. Consult our technical team at Shansen Enterprises to confirm the correct fuse class and rating for your specific motor kW rating and starting method.
What fuse base or holder is compatible with the 125MO9-660?
The 125MO9-660 is a BS Size B2 bolted centre-tag fuse link. It requires a B2-rated fuse base, fuse carrier, or fuse switch disconnector designed for centre-tag bolted connections at 660/690 V AC. Confirm the fuse holder’s current and voltage rating matches or exceeds 125 A and 660 V respectively. Shansen Enterprises can help you identify the correct matching Eaton Bussmann fuse base for your panel design.
What is the breaking capacity of the 125MO9-660 and why does it matter?
The 125MO9-660 has a rated breaking capacity of 80 kA. This is the maximum prospective fault current the fuse can safely interrupt without rupturing or causing collateral damage to the panel. When selecting a fuse, the breaking capacity must exceed the prospective short-circuit current (PSCC) at the point of installation — verified from the system fault level study. An 80 kA rating is adequate for the vast majority of LV industrial distribution systems in India.
Does the 125MO9-660 comply with IEC standards applicable in India?
Yes. The 125MO9-660 complies with BS88 Part 2 and IEC 60269-2 — the international standard for low-voltage fuses adopted by the Bureau of Indian Standards (BIS) as IS 13703. It is IEC Rated and CE Marked, satisfying the requirements of electrical consultants, factory inspectorates, and export-oriented OEM panel builders in India.
How do I order the Eaton Bussmann 125MO9-660 from Shansen Enterprises?
You can request a quote directly from Shansen Enterprises by clicking the WhatsApp button on this page or sending an email through the enquiry form. Please mention the catalog number 125MO9-660 and your required quantity. Our team in Coimbatore will respond with pricing, availability, and lead time. We supply across India — including Chennai, Bangalore, Mumbai, Pune, Hyderabad, and all major industrial cities — with doorstep delivery options for bulk orders.
