Description
Overview
The Eaton Bussmann 200MMT is a high-speed, double barrel BS88 Type semiconductor protection fuse rated 200 A at 690 V AC and 450 V DC, belonging to the Bussmann MMT series. Designed to protect sensitive power semiconductor devices such as thyristors, SCRs, diodes, and IGBTs, it offers an extremely fast pre-arcing response that prevents thermal and di/dt damage to switching devices. Manufactured to BS88 Part 4 and IEC 60269-4 standards, the 200MMT carries CE marking, RoHS compliance, IEC rating, and UL recognition, making it suitable for both domestic Indian industrial installations and export-grade equipment.
Key Features
- High-Speed Double Barrel Design — sub-cycle fault clearing protects semiconductor junctions from I²t damage
- 200 A Current Rating — suitable for medium-power drives and converter stages
- 690 V AC / 450 V DC Dual Voltage Rating — covers both three-phase AC and DC common bus applications in a single fuse
- 200 kA Breaking Capacity — handles high prospective short-circuit currents typical in industrial power systems
- Class aR Rating — optimized exclusively for semiconductor protection, providing the lowest available I²t for component safety
- IEC 60269-4 Compliant — internationally recognized standard ensures interoperability and system safety
- CE Marked and RoHS Compliant — meets European conformity requirements and restricts hazardous substances
- IEC Rated and UL Recognized — dual certification supports global OEM equipment approvals
- Bussmann MMT Series Consistency — standardized form factor simplifies panel design, spare part management, and field replacement
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 200MMT |
| Series | Bussmann MMT |
| Fuse Type | High Speed British Standard, Double Barrel |
| Fuse Class | Class aR |
| Amperage Rating | 200 A |
| Voltage Rating (AC) | 690 V AC |
| Voltage Rating (DC) | 450 V DC |
| 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 200MMT is the correct choice wherever power semiconductor devices must be protected from overcurrent conditions faster than a standard circuit breaker or general-purpose fuse can respond. Its Class aR characteristic means the fuse is rated exclusively for back-up semiconductor protection and must be coordinated with a suitably rated upstream overcurrent device for overload protection. Typical installations include variable frequency drives (VFDs), DC motor drives, thyristor-controlled rectifiers, IGBT-based inverters, soft starters, and DC common bus systems operating on 415 V or 690 V supply systems.
In Indian industrial environments — including textile machinery in Coimbatore, CNC machining centres in Pune, steel plant drives in Jharkhand, and marine converter panels on the western coast — the 200MMT provides reliable semiconductor protection where ambient temperatures and harmonic-rich supply conditions place additional thermal stress on switching devices. The 690 V AC rating covers the full range of Indian HT distribution-fed drive panels without derating.
When selecting this fuse, verify the semiconductor manufacturer’s published I²t withstand value and confirm the 200MMT’s let-through I²t is below that threshold. Coordinate with matched fuse holders from the Eaton Bussmann MMT holder range to ensure correct contact pressure, blade engagement, and thermal performance. Contact Shansen Enterprises for application-specific selection support and system coordination studies.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — guaranteed genuine product with full manufacturer traceability
- 100% genuine Eaton Bussmann products supplied with warranty and documentation
- Pan-India delivery to all major industrial cities and tier-2 locations
- WhatsApp technical support for product selection, coordination queries, and cross-references
- Bulk pricing and priority allocation for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann MMT Series Fuse Holders — matched blade-contact holders for double barrel MMT fuses
- Eaton Bussmann Class aR Semiconductor Fuses — other current ratings in MMT and compatible series for system coordination
- Eaton Bussmann BS88 Part 4 High-Speed Fuse Links — complementary high-speed fuses for related circuit protection
- Eaton Bussmann Fuse Monitoring and Blown Fuse Indicators — microswitch and visual indicators for MMT holders
- Eaton Bussmann DIN Rail Fuse Holders — for auxiliary and control circuit protection within the same panel
- Surge Protection Devices (SPDs) — coordinate upstream SPDs to limit transient voltage stress on semiconductor fuses
Frequently Asked Questions
What does Class aR mean and how is it different from Class gG or gR?
Class aR fuses are designed exclusively for back-up protection of power semiconductor devices and operate only in the overcurrent range above their minimum breaking current — they do not provide overload protection. Class gG fuses are general-purpose full-range fuses protecting cables and equipment including overloads. Class gR fuses are full-range semiconductor protection fuses that cover both overload and short-circuit ranges. For the 200MMT, you must ensure an upstream device handles overload protection; the aR fuse handles only high-magnitude short-circuit current that would otherwise destroy the semiconductor junction in microseconds.
Can the Eaton Bussmann 200MMT be used on a 415 V AC three-phase supply in India?
Yes. The 200MMT is rated 690 V AC, which means it is fully suitable for use on 415 V AC three-phase systems — the standard industrial supply voltage in India — without any derating. The 690 V rating provides an additional margin of safety for transient overvoltages and supply fluctuations commonly seen in Indian grid-connected installations.
What is the significance of the double barrel design in the 200MMT?
The double barrel (also called dual element or two-pole body) construction provides two parallel fusing elements within a single fuse body, effectively interrupting the fault current path in both polarities simultaneously. This is particularly important in DC common bus and bridge rectifier circuits where the current must be interrupted in both the positive and negative conductors. The double barrel design also contributes to the high 200 kA breaking capacity by distributing arc energy across two chambers.
How do I select the correct fuse holder for the 200MMT?
The 200MMT must be mounted in a compatible Eaton Bussmann MMT series fuse holder rated for the double barrel blade contact dimensions, current rating, and voltage class of the fuse. Using an incorrectly rated or non-matched holder can result in excessive contact resistance, overheating, and premature fuse operation or holder damage. Contact Shansen Enterprises with your panel layout and current rating requirements and our technical team will confirm the correct holder part number from the Eaton Bussmann range.
Is the Eaton Bussmann 200MMT available for immediate dispatch from Coimbatore?
Stock availability varies based on demand. Shansen Enterprises maintains inventory of fast-moving Eaton Bussmann semiconductor fuse ratings and can advise on current stock levels and lead times. For urgent requirements or bulk orders, contact us via WhatsApp or email so we can check availability and arrange priority dispatch to your location anywhere in India.
How do I order the Eaton Bussmann 200MMT from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 200MMT by clicking the WhatsApp button on this page or sending your requirements to our email. Please include the catalog number (200MMT), required quantity, delivery location, and any application details if you need selection confirmation. Our team at Shansen Enterprises in Coimbatore will respond promptly with pricing, availability, and delivery timelines for shipment across India.
