Description
Overview
The Eaton Bussmann 170M3273 belongs to the renowned 170M Series of high speed square body semiconductor fuses, purpose-built for protecting thyristors, IGBTs, diodes, and other semiconductor devices in demanding industrial power electronics applications. Rated at 630 A and 690 V AC with a 200 kA interrupt rating, this fuse provides the fast I²t response required to protect costly semiconductor components before thermal damage occurs. It carries IEC 60269-4 certification and is CE marked and RoHS compliant, making it suitable for both Indian and export-grade panel assemblies.
Key Features
- 630 A Amperage Rating — handles high continuous current loads in heavy-duty drive and converter applications
- 690 V AC Voltage Rating — suitable for standard 400 V and 690 V industrial power distribution systems in India
- 200 kA Breaking Capacity — delivers market-leading fault interruption capability to protect expensive semiconductor stacks
- Class aR Fuse Classification — optimized for semiconductor protection duty, providing faster clearing than general-purpose fuses
- Square Body 1*KN/110 Format — industry-standard bolt-in body for straightforward retrofitting and panel integration
- IEC 60269-4 Rated — meets international standards for high speed fuses in semiconductor protection circuits
- CE Marked and RoHS Compliant — ready for compliant installations in industrial automation and export panels
- UL/CSA Listed — accepted for North American market compliance where dual-standard panels are required
- No Indicator — compact, indicator-free design suited for enclosures where visual access is limited or monitoring is via external means
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M3273 |
| Series | Bussmann 170M |
| Amperage Rating | 630 A |
| Voltage Rating (AC) | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Fuse Type | High Speed Square Body |
| Construction | Square body 1*KN/110 format, bolt-in connections |
| Fuse Indicator | None |
| Standard | IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL/CSA Listed |
Applications & Selection Guide
The 170M3273 is the preferred semiconductor protection fuse for engineers designing variable frequency drive (VFD) panels, DC common bus systems, soft starters, power converters, and rectifier assemblies operating at 690 V. The Class aR rating means this fuse is specifically classified for semiconductor protection — it clears faults fast enough to prevent destructive thermal runaway in thyristors, SCRs, and IGBT modules that standard gG or gR fuses cannot adequately protect. At 630 A, it is well suited for large drive systems typically found in heavy industrial environments.
In the Indian manufacturing context, the 170M3273 sees wide deployment in steel plants, cement factories, chemical process lines, paper mills, and large HVAC installations across cities like Coimbatore, Pune, Ahmedabad, and Chennai — wherever high-power motor drives or power conversion equipment must be protected reliably. Its 690 V rating makes it compatible with both 415 V and 690 V bus configurations, offering flexibility for multi-voltage plant installations.
When selecting this fuse, confirm the continuous current rating matches the semiconductor device’s RMS current requirement with appropriate derating for ambient temperature. Consult the Eaton Bussmann 170M Series selection guide for I²t coordination with your specific thyristor or IGBT module. Shansen Enterprises can assist with fuse-to-drive coordination for panel builders and OEMs in Coimbatore and across India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — guaranteed genuine product with full manufacturer traceability
- 100% genuine Eaton Bussmann fuses with warranty — no grey market or counterfeit risk
- Pan-India delivery — shipping to Chennai, Mumbai, Pune, Hyderabad, Bangalore, Delhi and beyond
- WhatsApp technical support — quick help on fuse selection, I²t coordination, and panel compliance
- Bulk pricing for panel builders, system integrators, and OEMs — contact us for project-based quotations
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and disconnectors for square body fuses
- Eaton Bussmann 170M Series fuses in adjacent current ratings (500 A, 710 A) for system coordination
- Eaton semiconductor fuse mounting hardware and bus bar connectors for 1*KN/110 format
- Eaton drive protection fuse blocks compatible with 690 V systems
- Eaton Bussmann striker pin indicators and blown-fuse signal accessories (where visual indication is required)
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 170M3273?
Class aR (current limiting, restricted range) is an IEC fuse classification specifically defined for semiconductor protection duty. Unlike Class gG general-purpose fuses, a Class aR fuse like the 170M3273 is designed to operate only in the overload and short-circuit range above a minimum breaking current, providing extremely fast clearing to protect thyristors, IGBTs, SCRs, and diodes from fault energy before they are thermally destroyed. It must always be used in conjunction with another protective device (such as a circuit breaker or contactor) for overload protection.
What is the breaking capacity of the 170M3273, and why does it matter?
The Eaton Bussmann 170M3273 has a breaking capacity of 200 kA. This means the fuse can safely interrupt fault currents up to 200 kA without rupturing, arcing beyond its body, or causing collateral damage. In high-power industrial installations with large transformer capacities — common in Indian steel, cement, and chemical plants — prospective fault currents can be very high, and selecting a fuse with adequate breaking capacity is a critical safety requirement under IEC 60269-4.
Is the 170M3273 suitable for VFD and DC drive protection in India?
Yes. The Eaton Bussmann 170M3273 is specifically designed for semiconductor protection applications including variable frequency drives (VFDs), DC common bus drives, soft starters, rectifiers, and power converters. Its 690 V AC rating accommodates both 415 V and 690 V systems prevalent across Indian industrial installations, and the 630 A rating suits large drive systems. Always verify I²t coordination between this fuse and your specific drive or semiconductor module using Eaton’s published selection data.
What is the physical format of the 170M3273 and how does it mount?
The 170M3273 uses a square body 1*KN/110 construction with bolt-in connections. This is a widely adopted standard form factor in the Bussmann 170M Series, compatible with Eaton’s range of square body fuse holders and disconnectors. Bolt-in mounting ensures a secure, low-resistance electrical connection suitable for high continuous current applications. Panel builders should verify the compatible fuse holder model with Eaton’s 170M Series accessory documentation or consult Shansen Enterprises for guidance.
Does the 170M3273 comply with CE and RoHS requirements?
Yes. The Eaton Bussmann 170M3273 is CE marked, confirming conformity with applicable European directives, and is RoHS compliant, meaning it is free from restricted hazardous substances. It is also IEC rated per IEC 60269-4 and UL/CSA listed, making it suitable for use in both Indian domestic panels and export equipment destined for European or North American markets.
How do I order the Eaton Bussmann 170M3273 from Shansen Enterprises?
Ordering the 170M3273 from Shansen Enterprises is straightforward. You can reach us via WhatsApp or email using the contact buttons on this page — simply share the catalog number 170M3273 along with your required quantity and delivery location. Our team will respond promptly with pricing, availability, and lead time. We supply genuine Eaton Bussmann products with full traceability and deliver across India including Coimbatore, Chennai, Bangalore, Mumbai, Pune, Hyderabad, and Delhi. Bulk and project-based inquiries are welcome.
