Description
Overview
The Eaton Bussmann 180MMT is a high-speed, double barrel, Class aR semiconductor protection fuse rated at 180 A and 690 V AC (450 V DC) with an exceptional 200 kA breaking capacity. Part of the proven Bussmann MMT series, it is engineered to respond within microseconds to overcurrent events, protecting costly power semiconductor devices — thyristors, IGBTs, diodes, and SCRs — from destructive fault currents. Compliant with BS88 Part 4 and IEC 60269-4, it is CE marked, RoHS compliant, IEC rated, and UL recognized.
Key Features
- Ultra-fast Class aR current limiting action — responds within microseconds to protect semiconductor junctions before they sustain thermal damage
- 200 kA breaking capacity — handles extreme fault currents in high-power industrial installations with confidence
- Double barrel construction — dual-element body provides superior current-limiting performance and balanced arc interruption
- 690 V AC / 450 V DC dual voltage rating — suitable for both AC drive systems and DC bus applications without separate fuse types
- BS88 Part 4 and IEC 60269-4 compliance — meets internationally recognized standards for high-speed semiconductor fuses
- CE marked and RoHS compliant — acceptable for export equipment and environmentally conscious panel designs
- UL recognized and IEC rated — dual certification supports both domestic Indian and export-market panel builders
- Wide semiconductor application coverage — protects DC drives, VFDs, power converters, rectifiers, soft starters, thyristor stacks, and DC common bus systems
- Bussmann MMT series reliability — backed by Eaton’s global engineering and decades of semiconductor protection expertise
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 180MMT |
| Series | Bussmann MMT |
| Fuse Type | High Speed British Standard Double Barrel |
| Fuse Class | Class aR |
| Amperage Rating | 180 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 180MMT is the right choice wherever power semiconductor devices — including SCRs, IGBTs, diodes, and thyristors — need to be protected from overcurrent damage in AC or DC drive systems. Its Class aR rating means it is designed exclusively for current limiting in semiconductor circuits and provides no overload protection; always pair it with a suitable upstream gG or gL fuse for overload protection of the full circuit. At 180 A and 690 V AC, it covers a broad range of medium-power drive modules and converter stages commonly found in Indian industry.
In Indian manufacturing, process, and infrastructure sectors, this fuse is widely used in variable frequency drives (VFDs) for motor control, three-phase rectifier bridges in UPS and power supply systems, thyristor-based DC motor drives in steel and paper mills, soft starter assemblies in pump and compressor panels, and DC common bus architectures in multi-drive systems. The 450 V DC rating makes it equally suitable for DC traction auxiliaries, battery charging systems, and solar inverter DC stages where fast-acting semiconductor protection is mandated.
When selecting the 180MMT, confirm that the prospective fault current at the installation point does not exceed 200 kA and that the continuous load current does not exceed 180 A under the worst-case ambient temperature conditions. For higher current ratings in the MMT series, or for equivalent 500 V or 1000 V class alternatives, Shansen Enterprises can assist with cross-reference and selection support from Coimbatore, serving panel builders, OEMs, and EPC contractors across Tamil Nadu and pan-India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products with full traceability
- 100% genuine Eaton Bussmann fuses supplied with manufacturer warranty
- Pan-India delivery to all major industrial cities and tier-2 locations
- WhatsApp technical support for selection, cross-reference, and replacement queries
- Bulk pricing and project discounts for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann MMT series fuse holders and fuse bases for double barrel fuses
- Upstream BS88 Class gG fuses for overload protection of the supply circuit
- Eaton DIN rail and panel-mount fuse carriers compatible with MMT body dimensions
- Semiconductor protection fuses in adjacent current ratings (e.g., 160MMT, 200MMT) for drive system coordination
- Eaton Bussmann fuse monitoring and blown-fuse indication accessories
- Surge protection devices (SPDs) for complementary protection of power converter input stages
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 180MMT fuse?
Class aR (current limiting, restricted range) designates a fuse intended solely for the protection of semiconductor devices against short-circuit overcurrents within a defined current range. Unlike general-purpose Class gG fuses, a Class aR fuse such as the 180MMT does not provide overload protection — it is engineered for extremely fast operation under high fault currents to prevent thermal and dI/dt damage to thyristors, IGBTs, diodes, and SCRs. A separate upstream fuse or circuit breaker rated for overload protection must always be used in conjunction with the 180MMT.
What is the difference between the BS88 Part 4 standard and IEC 60269-4?
BS88 Part 4 is the British Standard that historically defined requirements for high-speed fuse links for the protection of semiconductor devices, while IEC 60269-4 is the corresponding international standard published by the International Electrotechnical Commission. The two standards are technically aligned, and fuses like the 180MMT that comply with both are accepted across European, Indian, and many export markets. IEC 60269-4 compliance is particularly relevant for projects governed by Indian Electricity Rules and Bureau of Indian Standards (BIS) aligned specifications.
Can the Eaton Bussmann 180MMT be used on DC bus systems in VFD panels?
Yes. The 180MMT carries a 450 V DC voltage rating, making it suitable for DC bus protection in variable frequency drive (VFD) panels, DC common bus multi-drive systems, and rectifier output stages. When applying any fuse on DC circuits, always verify that the DC voltage rating equals or exceeds the actual DC bus voltage at the point of installation, and confirm that the prospective short-circuit current does not exceed the 200 kA breaking capacity.
Is the Eaton Bussmann 180MMT RoHS compliant and CE marked?
Yes. The 180MMT is both CE marked and RoHS compliant, confirming that it meets European Union requirements for electrical safety and the restriction of hazardous substances. This makes it appropriate for use in equipment destined for EU export markets as well as for environmentally conscious panel designs within India. The product is also IEC rated and UL recognized, supporting a wide range of project and customer certification requirements.
What fuse holder or fuse base is compatible with the Eaton Bussmann 180MMT?
The 180MMT uses a double barrel BS88 body format, and it requires a fuse holder or fuse base designed for the Bussmann MMT series double barrel physical dimensions. Eaton offers a range of compatible fuse carriers and panel-mount bases for this series. Shansen Enterprises can help confirm the correct holder, blade contact, or rail-mount base for your panel layout — contact us via WhatsApp or email with your current rating and enclosure details for a specific recommendation.
How do I order the Eaton Bussmann 180MMT from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 180MMT directly from Shansen Enterprises in Coimbatore by clicking the WhatsApp button or the email quote button on this page. Please mention the catalog number 180MMT, the quantity required, and your delivery location anywhere in India. Our team will respond promptly with pricing, availability, and estimated delivery timelines. For bulk orders or ongoing project requirements, ask about our panel builder pricing and scheduled supply arrangements.
