Description
Overview
The Eaton Bussmann 170M1371 is a high speed square body semiconductor fuse rated 250 A at 690 V AC, engineered to protect sensitive power electronic components such as SCRs, diodes, IGBTs, and thyristor assemblies from fault currents. Part of the globally trusted 170M Series, this Class aR fuse delivers ultra-fast current limiting action with a 200 kA breaking capacity, making it well suited for high-power industrial drive and converter panels. Its compact 000/80 format with bolt-in connections simplifies installation in standard fuse holders and power electronics enclosures.
Key Features
- 250 A Current Rating — suitable for medium-power semiconductor protection in industrial drive and converter systems
- 690 V AC Voltage Rating — compatible with standard three-phase industrial supply voltages used across Indian manufacturing facilities
- 200 kA Interrupt Rating — high breaking capacity ensures reliable fault clearance even on stiff bus systems
- Class aR Semiconductor Fuse — specifically designed for the partial-range protection of power electronic devices including SCRs, diodes, and IGBT modules
- IEC 60269-4 Compliant — meets international standards for semiconductor protection fuses, ensuring predictable and consistent performance
- 000/80 Square Body Format — standardized form factor enables drop-in replacement in existing fuse holders without panel modifications
- Bolt-In Connections — secure, low-resistance connections reduce thermal hot spots and improve long-term reliability in high-current applications
- No Fuse Indicator — suitable for applications where visual indication is not required or where external monitoring is used
- CE Marked and RoHS Compliant — meets European safety and environmental directives, accepted in export-oriented Indian manufacturing and OEM panels
- UL/CSA Listed — dual certification broadens applicability to projects with North American compliance requirements
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M1371 |
| Series | Bussmann 170M |
| Amperage Rating | 250 A |
| Voltage Rating (AC) | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction | Square body 000/80 format with bolt-in connections |
| Fuse Indicator | None |
| Standard | IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL/CSA Listed |
| Application | Semiconductor protection, DC common bus, DC drives, power converters, rectifiers, VFDs, soft starters, thyristor stacks |
Applications & Selection Guide
The Eaton Bussmann 170M1371 is the preferred choice for protecting semiconductor devices in variable frequency drives (VFDs), DC common bus systems, soft starters, rectifier assemblies, and thyristor stacks rated at or below 250 A on 690 V AC supply systems. Its Class aR rating means it is optimized for partial-range current limiting — acting extremely fast during fault conditions to protect the semiconductor junction before it is destroyed, but not intended as the primary overcurrent protection for cables or motor windings. Always pair this fuse with appropriate backup fuses or circuit breakers for complete system protection.
In Indian industrial sectors including automotive component manufacturing, steel processing, textile mills, chemical plants, and renewable energy converter stations, high speed semiconductor fuses are critical for preventing costly downtime caused by blown power modules. The 170M1371 is particularly relevant to panel builders and OEMs in the Coimbatore industrial belt who build VFD panels, soft starter panels, and rectifier cabinets for domestic and export markets. Its IEC 60269-4 compliance and UL/CSA listing make it acceptable across a wide range of project specifications.
When selecting this fuse, verify that the fuse holder or fuse block is rated for the 000/80 square body format and supports bolt-in terminal connections. Confirm that the I²t let-through characteristics of the 170M1371 are within the I²t withstand rating of the semiconductor devices being protected. Consult Shansen Enterprises in Coimbatore for application-specific selection assistance and to confirm availability and lead times across India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products with full manufacturer traceability
- 100% genuine Eaton Bussmann products supplied with warranty and documentation
- Pan-India delivery to all major cities and industrial zones including Chennai, Bangalore, Mumbai, Pune, Hyderabad, and beyond
- WhatsApp technical support for application selection, cross-referencing, and installation guidance
- Bulk pricing available for panel builders, OEMs, EPC contractors, and system integrators
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and fuse blocks for 000/80 square body format
- Eaton Bussmann 170M Series fuses in adjacent current ratings (200 A, 315 A) for system design flexibility
- Eaton Bussmann backup fuses (Class gG or gR) for complete upstream overcurrent protection
- Eaton DIN rail mounted fuse bases compatible with bolt-in semiconductor fuses
- Eaton power electronic protection relays and monitoring modules for VFD and converter panels
- Copper bus bar connectors and insulated terminal covers for 000/80 fuse installations
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 170M1371?
Class aR designates a semiconductor fuse designed for partial-range current limiting protection of power electronic devices such as thyristors, SCRs, diodes, and IGBTs. Unlike general-purpose fuses, a Class aR fuse operates at extremely high speed during overload and fault conditions specifically to protect the semiconductor junction before it is damaged. It does not provide full-range overcurrent protection for cables or other components, so a backup fuse or circuit breaker must always be used in the circuit for complete protection.
What is the interrupt rating of the 170M1371 and why does it matter?
The 170M1371 has an interrupt rating of 200 kA, which is the maximum prospective fault current the fuse can safely interrupt without catastrophic failure. In industrial plants connected to high-capacity distribution networks — common in large manufacturing facilities across India — available fault currents can be very high. A 200 kA interrupt rating ensures this fuse can safely clear worst-case faults without rupturing, protecting downstream equipment and panel integrity.
Can the Eaton Bussmann 170M1371 be used on a 415 V AC supply system in India?
Yes. The 170M1371 is rated for 690 V AC, which means it is fully compatible with the standard 415 V AC three-phase supply used throughout India. Using a 690 V rated fuse on a 415 V system provides additional voltage margin and is a common practice in panel design. Always verify that all other system components — fuse holders, bus bars, and connected equipment — are also rated for the supply voltage in use.
Is the 170M1371 suitable for protecting VFDs and soft starters in industrial panels?
Yes. The Eaton Bussmann 170M1371 is specifically designed for semiconductor protection in applications including variable frequency drives (VFDs), soft starters, DC drives, rectifiers, power converters, and thyristor stacks. Its Class aR rating and ultra-fast current limiting action make it the correct fuse type for protecting the input bridge rectifiers and output inverter stages found in VFD and soft starter equipment. Always cross-check the fuse I²t rating against the semiconductor device’s I²t withstand value during panel design.
What fuse holder or fuse block is compatible with the 170M1371?
The 170M1371 uses a 000/80 square body format with bolt-in connections. Compatible fuse holders and fuse blocks must support this form factor and the corresponding bolt-in terminal style. Eaton Bussmann offers a range of matching fuse bases and holders for the 170M Series. Contact Shansen Enterprises in Coimbatore for assistance in identifying the correct fuse holder for your panel layout and current rating requirements.
How do I order the Eaton Bussmann 170M1371 from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 170M1371 directly from Shansen Enterprises by clicking the WhatsApp button on this page or by sending an email with the catalog number 170M1371 and your required quantity. Our team in Coimbatore will respond promptly with pricing, availability, and estimated delivery timeline to your location anywhere in India. Bulk orders from panel builders, OEMs, and EPC contractors are welcome and eligible for preferential pricing.
