Description
Overview
The Eaton Bussmann 180MT is a single barrel, high speed BS88-type semiconductor protection fuse link from the Bussmann MT Series, rated 180A at 690V AC and 450V DC with a 200 kA breaking capacity. Conforming to BS88 Part 4 and IEC 60269-4, it carries Class aR classification, meaning it is optimised exclusively for semiconductor protection with an extremely fast arc-quenching characteristic that limits let-through energy (I²t) to levels safe for solid-state devices. CE marked, RoHS compliant, IEC rated, and UL recognised, the 180MT meets the stringent requirements of modern industrial and renewable energy power electronics installations across India and globally.
Key Features
- Class aR Semiconductor-Specific Protection — ultra-fast current-limiting action keeps let-through energy within the safe operating area of thyristors, IGBTs, and power diodes
- High Breaking Capacity of 200 kA — safely interrupts severe fault currents on 690V AC industrial bus systems without damage to the fuse holder or surrounding equipment
- Dual Voltage Rating (690V AC / 450V DC) — suitable for both AC converter input stages and DC common bus architectures in drives and rectifiers
- Single Barrel Form Factor — compact, well-defined footprint compatible with standard BS88 Part 4 semiconductor fuse holders and DIN-rail mounted bases
- IEC 60269-4 Compliance — manufactured and tested to the international standard governing high-speed fuses for semiconductor protection, ensuring interoperability and reliability
- CE Marked and RoHS Compliant — meets European conformity and hazardous-substance directives for export-ready machine builders and panel manufacturers
- IEC Rated and UL Recognised — dual certification simplifies specification for projects requiring both IEC and UL compliance in the same installation
- Low I²t Characteristic — the MT Series current-limiting design minimises thermal and electromagnetic stress on downstream semiconductor junctions during fault clearing
- Part of the Trusted Bussmann MT Series — consistent dimensional and electrical performance across the MT range simplifies spares management and system upgrades
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 180MT |
| Series | Bussmann MT |
| Rated Voltage AC | 690 V |
| Rated Voltage DC | 450 V |
| Amperage Rating | 180 A |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Fuse Type | High Speed British Standard |
| Form Factor | Single Barrel |
| Standard | BS88 Part 4, IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL Recognised |
| Application | Semiconductor protection, DC drives, VFDs, power converters, rectifiers, soft starters, thyristor stacks, DC common bus |
Applications & Selection Guide
The 180MT is the correct choice wherever a solid-state power device rated up to 180A must be protected against destructive overcurrents on 690V AC or 450V DC systems. Typical installations include the input or output stages of variable frequency drives (VFDs), AC-DC rectifier bridges, DC common bus systems, thyristor-controlled soft starters, and IGBT-based power converters in industrial automation, metal processing, and plastics machinery. In all these cases, the Class aR rating confirms that the fuse is designed to operate only in the short-circuit range — it must be coordinated with a suitable back-up fuse or circuit breaker for overload protection.
When selecting the 180MT for a specific application, verify that the continuous current does not exceed 180A, that the supply voltage is within 690V AC or 450V DC, and that the prospective short-circuit current at the point of installation does not exceed 200 kA. The single barrel form factor requires a compatible BS88 Part 4 semiconductor fuse holder; consult Shansen Enterprises for holder and DIN-rail base options from the Eaton Bussmann accessory range. For DC common bus drives, confirm the 450V DC rating covers the rectified bus voltage including any regenerative overshoot.
Indian industries that commonly specify the Bussmann MT Series include steel rolling mills, textile machinery manufacturers, lift and elevator OEMs, water treatment drive panels, renewable energy inverter assemblers in Coimbatore and across Tamil Nadu, and chemical plant VFD panel builders. The CE and RoHS compliance also makes the 180MT suitable for export-oriented machine builders supplying European markets from India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products with full manufacturer traceability
- 100% genuine Eaton Bussmann fuses with warranty — no counterfeit risk
- Pan-India delivery — prompt dispatch from Coimbatore to all major cities and industrial zones
- WhatsApp technical support — get application guidance, cross-reference help, and documentation quickly
- Bulk pricing for panel builders, OEMs, and EPC contractors — contact us for volume discounts and blanket order arrangements
Compatible Products & Accessories
- Eaton Bussmann BS88 Part 4 Semiconductor Fuse Holders (single barrel, matching MT Series dimensions)
- Eaton Bussmann DIN-rail fuse bases compatible with MT Series single barrel fuses
- Eaton Bussmann MT Series fuses in adjacent ratings (160MT, 200MT) for drive coordination studies
- Eaton Bussmann back-up gG or gL fuses for overload protection upstream of the aR fuse
- Eaton Bussmann fuse blown indicators and monitoring accessories for MT Series holders
- Eaton manual motor starters and contactors for complete drive protection assemblies
Frequently Asked Questions
What does Class aR mean, and why is it important for semiconductor protection?
Class aR (current-limiting, restricted range) designates fuses that are designed exclusively to operate in the short-circuit range, not for overload protection. They feature an extremely fast arc-quenching characteristic that limits the let-through energy (I²t) and peak let-through current to levels within the safe operating area of semiconductor devices such as thyristors, IGBTs, and power diodes. Because solid-state junctions can be destroyed in microseconds by fault currents, Class aR fuses like the 180MT provide a level of protection that conventional gG or gL fuses cannot match. An aR fuse must always be coordinated with an upstream back-up protective device to cover the overload range.
Can the Eaton Bussmann 180MT be used on a 480V DC common bus drive system?
No. The 180MT has a DC voltage rating of 450V. Using it on a bus that operates above 450V DC, including any regenerative overshoot voltage, would exceed its rated voltage and could result in failure to interrupt a fault safely. For 480V DC or higher common bus applications, you should select an MT Series or equivalent fuse with the appropriate DC voltage rating. Contact Shansen Enterprises and we will help you identify the correct catalog number for your DC bus voltage.
Is the 180MT suitable for protecting VFDs in Indian industrial installations running on 415V AC supply?
Yes. The 180MT is rated at 690V AC, which comfortably covers the 415V AC supply commonly used in Indian industrial facilities. The higher voltage rating provides additional safety margin and also makes the fuse suitable for installations that have been upgraded to 480V or 690V AC supply. The 180A current rating should be matched to the VFD input current — typically the fuse rating is selected based on the drive manufacturer’s recommendation, which accounts for the semiconductor I²t withstand capability rather than the drive’s continuous input current alone.
What fuse holder is compatible with the Eaton Bussmann 180MT single barrel fuse?
The 180MT requires a BS88 Part 4 semiconductor fuse holder designed for the MT Series single barrel form factor. Eaton Bussmann offers a range of panel-mount and DIN-rail fuse bases that are dimensionally matched to the MT Series. The exact holder depends on the fuse’s physical dimensions (blade spacing, body length, and cross-section). Shansen Enterprises can supply both the fuse and the compatible holder as a set — please share your mounting configuration and we will confirm the correct accessory catalog numbers.
Does the 180MT carry UL recognition as well as IEC certification?
Yes. The Eaton Bussmann 180MT is both IEC Rated and UL Recognised, in addition to being CE Marked and RoHS Compliant. The dual IEC and UL certification is particularly valuable for Indian machine builders and panel manufacturers who export equipment to North American or European markets, as it reduces the need for separate component approvals during machine certification. Always verify the specific UL file number and conditions of recognition in the Eaton Bussmann datasheet when designing to UL standards.
How do I order the Eaton Bussmann 180MT from Shansen Enterprises?
You can request a quote directly through the WhatsApp button or the email enquiry form on this page. Please mention the catalog number 180MT, the quantity required, and your delivery location in India. Shansen Enterprises is an authorized Eaton channel partner based in Coimbatore, Tamil Nadu, and we supply genuine Eaton Bussmann fuses with pan-India delivery. For bulk orders, OEM supply agreements, or urgent requirements, WhatsApp is the fastest way to reach our technical sales team.
