Description
Overview
The Eaton Bussmann 200MT is a Class aR high speed semiconductor protection fuse rated 200A at 690V AC and 450V DC, offering a breaking capacity of 200 kA. Engineered to the BS88 Part 4 and IEC 60269-4 standards, it is purpose-built for protecting power semiconductor devices — including thyristors, SCRs, IGBTs, and diodes — in demanding industrial power electronics circuits. Its single barrel construction and ultra-fast current-limiting action prevent catastrophic damage to expensive semiconductor components during fault conditions.
Key Features
- Ultra-High Breaking Capacity — 200 kA interrupting rating provides robust protection even in high fault-current environments.
- High Speed Current Limiting — Class aR action clears faults before damaging let-through energy reaches semiconductor junctions.
- Dual Voltage Rating — Rated 690V AC and 450V DC, suitable for both AC and DC bus protection in the same installation.
- BS88 Part 4 / IEC 60269-4 Compliant — Meets internationally recognized standards for semiconductor fuse performance and safety.
- CE Marked & RoHS Compliant — Meets European safety and environmental directives for global project exports.
- IEC Rated & UL Recognized — Accepted under both IEC and UL certification frameworks, simplifying panel certification.
- Single Barrel Construction — Compact, well-defined form factor integrates easily into fuse holders and busbars designed for MT series.
- Bussmann MT Series Reliability — Part of a proven product family widely deployed in industrial drives, converters, and power supply systems.
- Semiconductor-Grade Protection — Designed specifically for thyristor stacks, DC common bus configurations, and phase-controlled rectifier bridges.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 200MT |
| Series | Bussmann MT |
| Amperage Rating | 200 A |
| Rated Voltage AC | 690 V |
| Rated Voltage DC | 450 V |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Fuse Type | High Speed British Standard |
| Body Style | Single Barrel |
| 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 200MT is the preferred choice for engineers designing protection schemes around power semiconductor devices. Its Class aR characteristic means it is rated exclusively for back-up semiconductor protection — it operates with extreme speed to limit the i²t energy let-through, preventing thermal and voltage stress that would destroy SCRs, thyristors, IGBTs, and diodes within microseconds of a fault. It is not a general-purpose fuse and must be selected alongside a separate overload protection device where required.
Typical Indian industrial applications include DC motor drive panels, AC variable frequency drive (VFD) input protection, phase-angle controlled rectifiers in electroplating and smelting plants, UPS and power conditioning equipment, soft starter input and output protection, and thyristor-based power controllers used in heating and process industries in Coimbatore, Chennai, Pune, Ahmedabad, and other manufacturing hubs. The 690V AC rating covers standard Indian LT supply systems with adequate margin, while the 450V DC rating covers common DC bus architectures.
When selecting the 200MT, verify that the peak let-through current (Ip) and let-through energy (I²t) values fall within the semiconductor manufacturer’s rated withstand limits. Always cross-reference the fuse holder and busbar compatibility — the Eaton Bussmann MT series has a defined set of compatible fuse carriers. For multi-drive or redundant converter installations, consult Shansen Enterprises for volume pricing and system-level selection support.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products, traceable supply chain
- 100% genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery — Coimbatore, Chennai, Bengaluru, Mumbai, Pune, Hyderabad, and beyond
- WhatsApp technical support for fuse selection, sizing, and coordination queries
- Bulk and project pricing available for panel builders, EPC contractors, and OEMs
Compatible Products & Accessories
- Eaton Bussmann MT Series Fuse Holders and Carriers (matching single barrel format)
- Eaton Bussmann DIN Rail and Busbar Mounted Fuse Bases for MT Series
- Eaton Bussmann Class aR Fuses — other amperage ratings in the MT Series (e.g., 100MT, 160MT, 250MT, 315MT)
- Eaton Bussmann Blown Fuse Indicators compatible with BS88 semiconductor fuses
- Semiconductor-rated fuse monitoring relays for drive panel integration
- Copper busbars and terminal accessories rated for 690V AC systems
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 200MT fuse?
Class aR denotes a fuse that is rated exclusively for semiconductor back-up protection. Unlike general-purpose Class gG fuses, a Class aR fuse is designed to operate only at high overcurrents — specifically to limit the let-through energy (I²t) during a fault before it exceeds the rated withstand of the semiconductor device being protected. The 200MT does not provide overload protection at low overcurrent levels; a separate overload protective device must be used in the circuit if overload protection is also required.
Can the Eaton Bussmann 200MT be used on both AC and DC circuits?
Yes. The 200MT carries a dual voltage rating: 690V AC for standard industrial AC supply systems and 450V DC for DC bus applications. This makes it suitable for protecting both the AC input side of rectifiers and the DC bus side of drives and power converters, provided the actual circuit voltage does not exceed these respective rated values. Always confirm the DC application voltage and circuit configuration before selection.
What is the breaking capacity of the 200MT and why does it matter for semiconductor protection?
The Eaton Bussmann 200MT has a breaking capacity of 200 kA. This is the maximum prospective fault current the fuse can safely interrupt without rupturing or creating additional hazards. In industrial installations fed from large transformers or with low-impedance supply systems, prospective short-circuit currents can be very high. A 200 kA rated fuse ensures safe interruption under worst-case fault conditions, protecting both the circuit and personnel.
Is the Eaton Bussmann 200MT suitable for VFD and soft starter applications in Indian factories?
Yes. The 200MT is specifically listed for use in DC drives, VFDs, soft starters, power converters, rectifiers, and thyristor stacks. In Indian manufacturing environments — including textile mills, CNC machine shops, cement plants, and process industries — VFDs and soft starters are widely deployed. The 200MT provides the high-speed semiconductor protection required to prevent costly drive module replacement after a fault event, making it a cost-effective protection investment.
Which fuse holder or fuse carrier is compatible with the Eaton Bussmann 200MT?
The 200MT is a single barrel High Speed British Standard (BS88 Part 4) fuse. It requires a fuse carrier or fuse base specifically designed for the Eaton Bussmann MT Series single barrel format. Using an incorrect or incompatible fuse holder can result in poor contact, overheating, or unsafe operation. Contact Shansen Enterprises in Coimbatore to confirm the correct matching fuse carrier for your panel design and busbar configuration.
How do I order the Eaton Bussmann 200MT from Shansen Enterprises?
Ordering the Eaton Bussmann 200MT from Shansen Enterprises is straightforward. You can send a WhatsApp message or email inquiry quoting catalog number 200MT along with the required quantity and delivery location. Our team will respond promptly with pricing, availability, and lead time. Shansen Enterprises serves customers across India including Coimbatore, Chennai, Bengaluru, Hyderabad, Mumbai, and Pune. Bulk orders for panel builders and project purchases receive preferential pricing. Visit shansenenterprises.com or use the contact details on this page to get in touch.
