Description
Overview
The Eaton Bussmann 280MT is a high speed, single barrel BS88-type semiconductor protection fuse rated at 280A and 690V AC (450V DC), delivering a 200 kA breaking capacity under Class aR duty. Built to IEC 60269-4 and BS88 Part 4 standards, this fuse provides ultra-fast current limitation to protect sensitive power electronic devices such as IGBTs, thyristors, SCRs, and diodes. As part of the trusted Bussmann MT series, it is both IEC rated and UL recognized, ensuring compliance across international and Indian industrial installations.
Key Features
- High Speed Class aR Operation — Ultra-fast response protects semiconductors before they can be thermally damaged by fault currents
- 280A Amperage Rating — Suitable for medium-to-high current semiconductor protection circuits in industrial drives and converters
- 690V AC / 450V DC Rated — Dual voltage rating supports both AC supply and DC bus protection in the same platform
- 200 kA Breaking Capacity — Handles prospective fault currents found in high power industrial installations safely
- Single Barrel BS88 Form Factor — Compact, standardized body for straightforward mounting in existing fuse holders and switchgear
- IEC 60269-4 and BS88 Part 4 Compliant — Meets international standards for semiconductor fuse performance and coordination
- CE Marked and RoHS Compliant — Meets European directives for low voltage equipment and restriction of hazardous substances
- IEC Rated and UL Recognized — Accepted across international markets and Indian industrial projects requiring dual certification
- Bussmann MT Series Platform — Consistent mechanical and electrical dimensions simplify replacement and system design
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 280MT |
| Series | Bussmann MT |
| Fuse Type | High Speed British Standard, Single Barrel |
| Fuse Class | Class aR |
| Amperage Rating | 280 A |
| Voltage Rating (AC) | 690 V |
| Voltage Rating (DC) | 450 V |
| Breaking Capacity | 200 kA |
| Standard | BS88 Part 4, IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL Recognized |
| Application | Semiconductor protection, DC drives, VFDs, power converters, rectifiers, soft starters, thyristor stacks, DC common bus |
Applications & Selection Guide
The Eaton Bussmann 280MT is purpose-built for the protection of semiconductor devices in power electronic systems operating at high current levels. It is the preferred choice for panel builders and OEMs designing variable frequency drives (VFDs), DC common bus systems, regenerative drives, soft starters, thyristor stacks, and controlled rectifiers where the fault clearing speed of a standard gG or gL fuse is insufficient to prevent device destruction.
Class aR fuses like the 280MT are selected specifically for back-up or full-range semiconductor protection duty. The 200 kA breaking capacity ensures safe interruption even on stiff industrial busbars where prospective short-circuit current is very high. The dual voltage rating of 690V AC and 450V DC allows engineers to use the same fuse family across AC-fed and DC bus protection points, simplifying spares inventory.
In India, this fuse series is widely used in industries including steel, cement, petrochemicals, textiles, automotive manufacturing, and renewable energy plants in and around Coimbatore, Chennai, Pune, Ahmedabad, and other industrial hubs. Panel builders and system integrators across India rely on Shansen Enterprises for genuine Eaton Bussmann MT series stock with fast dispatch.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — supplying genuine Bussmann products
- 100% genuine products with manufacturer warranty and traceability
- Pan-India delivery to all major industrial cities and states
- WhatsApp technical support for fuse selection, sizing, and coordination
- Bulk and project pricing available for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann MT series fuse holders and fuse bases compatible with single barrel BS88 body
- Other Bussmann MT series ratings (e.g., 160MT, 200MT, 315MT, 400MT) for drive panel coordination
- Eaton Bussmann DIN rail fuse holders for BS88 single barrel fuses
- Eaton Bussmann striker pin accessories and blown fuse indicators for MT series
- Eaton semiconductor protection contactors and bus bars for drive and converter panels
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 280MT?
Class aR (current limiting, restricted range) designates a fuse intended exclusively for semiconductor protection. Unlike Class gG general purpose fuses, an aR fuse clears fault currents extremely rapidly — typically within a fraction of a cycle — to prevent thermal and di/dt damage to SCRs, IGBTs, diodes, and other sensitive power devices. The 280MT must be used with a back-up protection device that handles overloads, since aR fuses are optimized for short-circuit clearing, not overload protection.
What is the difference between the AC and DC voltage ratings of the 280MT?
The 280MT carries a 690V AC rating for use on standard industrial AC supply circuits and a 450V DC rating for DC bus and DC drive applications. DC fault current lacks the natural zero crossing present in AC waveforms, making arc extinction more demanding; hence the lower DC voltage rating is a deliberate design limit. Always confirm the application voltage against the appropriate AC or DC rating before installation.
Can the Eaton Bussmann 280MT be used to protect a VFD input or output?
Yes. The 280MT is rated for VFD (variable frequency drive) protection. It is typically installed on the DC bus or AC input rectifier stage of a drive to protect the power semiconductors. For VFD output protection, consult Eaton’s application guidelines and coordinate the fuse I²t rating with the semiconductor’s withstand I²t to ensure selectivity. Shansen Enterprises can assist with application-specific fuse selection for VFD projects across India.
Is the 280MT compliant with Indian electrical installation standards?
The 280MT conforms to IEC 60269-4 and BS88 Part 4, which are internationally recognized standards accepted by Indian regulatory bodies and followed by major Indian panel builders and EPCs. It is also CE marked and UL recognized, supporting projects that require dual international certification. For projects under Indian Electricity Rules or BIS framework, verify with your local authority and consult Shansen Enterprises for documentation support.
What fuse holder or base is compatible with the Eaton Bussmann 280MT?
The 280MT uses the standard BS88 single barrel body dimensions of the Bussmann MT series. Compatible fuse holders and fuse bases designed for BS88 single barrel fuses at 280A and 690V should be used. Eaton offers dedicated fuse holders within the Bussmann MT series accessory range. Contact Shansen Enterprises to confirm the correct holder part number for your panel design and current rating.
How do I order the Eaton Bussmann 280MT from Shansen Enterprises?
You can request a quote directly from Shansen Enterprises by clicking the WhatsApp button or the email inquiry button on this page. Mention catalog number 280MT, the quantity required, and your delivery location in India. Our team in Coimbatore will respond with pricing, availability, and dispatch details promptly. Bulk orders for panel builders and project requirements receive priority attention and competitive pricing.
