Description
Overview
The Eaton Bussmann 170M5811D is a high speed square body semiconductor fuse rated at 550 A and 690 V AC, designed to protect sensitive power semiconductor devices such as thyristors, IGBTs, diodes, and SCRs in high-demand industrial drive and converter applications. Part of the proven 170M Series, this fuse features a DIN 43620 DIN 2 format with knife blade contacts, dual indicator (Type D) for visual fault detection, and a 200 kA breaking capacity under IEC 60269-4. Its Class aR rating ensures ultra-fast current limiting action, providing the sub-cycle response times required to prevent destructive semiconductor damage in VFDs, rectifiers, and DC bus systems installed across Indian manufacturing and infrastructure projects.
Key Features
- 550 A Current Rating — handles high-load semiconductor circuits without nuisance tripping
- 690 V AC Rated Voltage — suitable for standard industrial three-phase power systems in India
- 200 kA Breaking Capacity — exceptional fault clearing capability for high-energy bus systems
- Class aR Rating — ultra-fast current limiting action specifically engineered for semiconductor protection
- DIN 43620 DIN 2 Format with Knife Blade Contacts — drop-in compatibility with standard DIN 2 fuse carriers and bases
- Dual Indicator Type D — two visual fuse blown indicators for quick fault identification in panels and cabinets
- IEC 60269-4 Compliant — internationally recognized standard ensuring predictable, reliable performance
- CE Marked and RoHS Compliant — meets European directives and restricts hazardous substances for global export projects
- IEC Rated and Factory Certified — fully tested and certified for consistent, repeatable protection characteristics
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M5811D |
| Series | Eaton Bussmann 170M |
| Amperage Rating | 550 A |
| Rated Voltage AC | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Fuse Type | High Speed Square Body |
| Construction | DIN 43620 DIN 2 format with knife blade contacts |
| Fuse Indicator | Dual Indicator (Type D) |
| Standard | IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated |
| Application | Semiconductor protection, DC common bus, DC drives, power converters, rectifiers, VFDs, soft starters, thyristor stacks |
Applications & Selection Guide
The 170M5811D is the correct choice when you need to protect power semiconductors — thyristors, IGBTs, SCRs, and diodes — in high-current industrial drive systems. Its Class aR classification means it reacts in sub-cycle time, limiting I²t energy to levels that prevent semiconductor junction damage during short circuit events. It is specifically suited for DC common bus architectures, multi-drive panels, and line-side or load-side protection in AC to DC rectifier bridges and VFD input stages rated up to 690 V.
In Indian industrial environments — including automotive manufacturing, steel rolling mills, textile machinery, water treatment, and renewable energy inverter systems — the 170M Series is widely specified by panel builders and OEMs who need IEC-compliant, DIN-format semiconductor protection. The DIN 2 knife blade format allows direct mounting in compatible Eaton Bussmann fuse carriers without modification, simplifying panel design and future maintenance. The dual Type D indicators reduce diagnostic time during plant shutdowns by making blown fuse identification immediate.
When selecting semiconductor fuses, ensure the fuse’s I²t let-through value is less than the rated I²t of the semiconductor device being protected. For 550 A applications at 690 V, consult the Eaton Bussmann 170M Series I²t characteristic curves or contact Shansen Enterprises in Coimbatore for application engineering support before finalizing your BOM.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — 100% genuine products with full manufacturer traceability
- 100% genuine Eaton Bussmann products supplied with warranty and proper documentation
- Pan-India delivery — we ship to Chennai, Bangalore, Mumbai, Pune, Hyderabad, Delhi, and all major industrial cities
- WhatsApp technical support — get application guidance and cross-reference help before you order
- Bulk pricing for panel builders, OEMs, EPCs, and system integrators — request a quote for project quantities
Compatible Products & Accessories
- Eaton Bussmann 170M Series DIN 2 Fuse Carriers and Bases — for direct mounting of the 170M5811D
- Eaton Bussmann 170M Series Remote Fuse Monitoring Contacts — for panel-level blown fuse alarm integration
- Eaton Bussmann 170M Series Fuse Reducers — for adapting DIN 2 carriers to adjacent DIN size formats
- Eaton Bussmann 170M Series Companion Fuses — for parallel and redundant bus protection designs
- Semiconductor Protection Coordination Charts — Eaton application notes for I²t coordination with IGBT and thyristor modules
Frequently Asked Questions
What does Class aR mean and why does the 170M5811D use this rating?
Class aR is an IEC fuse classification for current-limiting fuses that are designed exclusively for semiconductor protection. Unlike general purpose gG fuses, Class aR fuses operate in a partial range — they respond only to high-magnitude fault currents (typically above 3–5× rated current) with extremely fast, sub-cycle action. This ultra-fast response limits the I²t energy let-through to a value that the semiconductor junction can survive. The 170M5811D carries a Class aR rating per IEC 60269-4, making it the correct protective device for thyristor stacks, IGBT modules, rectifier bridges, and similar power semiconductor assemblies where a standard fuse would react too slowly to prevent device destruction.
What fuse carrier or fuse base is compatible with the Eaton Bussmann 170M5811D?
The 170M5811D is built to DIN 43620 DIN 2 format with knife blade contacts, so it is compatible with Eaton Bussmann fuse carriers and bases designed for the DIN 2 form factor within the 170M Series. When specifying a carrier, confirm that it is rated for at least 550 A continuous current and 690 V AC. Contact Shansen Enterprises in Coimbatore for the correct carrier catalog number to pair with this fuse for your panel design.
What is the breaking capacity of the 170M5811D and what does it mean for my application?
The 170M5811D has a breaking capacity (interrupt rating) of 200 kA. This means the fuse is capable of safely interrupting a fault current of up to 200 kA without rupturing, arcing externally, or causing collateral damage to the enclosure or adjacent components. For industrial installations on high-capacity distribution systems — such as those found in steel plants, data centres, or large manufacturing facilities in India — a 200 kA interrupt rating provides a substantial safety margin against prospective fault currents typically seen at 690 V bus bars.
How do the dual indicators (Type D) on the 170M5811D work?
The Type D dual indicator is a mechanical trip indicator built into the fuse body. When the fuse element operates (blows), the indicator pin or flag physically extends or changes position on both sides of the fuse. This provides an immediate visual confirmation that the fuse has operated, without the need for electrical continuity testing. In multi-fuse panels or drive cabinets where multiple 170M Series fuses are installed, the dual indicator allows maintenance engineers to identify the blown fuse quickly from either side of the panel, reducing downtime during fault diagnosis at Indian industrial facilities.
Can the 170M5811D be used for DC applications such as DC common bus or DC drives?
Yes. The 170M5811D is explicitly rated and recommended by Eaton Bussmann for DC common bus, DC drives, power converters, and rectifier applications. When applying this fuse on DC circuits, refer to the 170M Series DC voltage derating guidelines and I²t coordination data published in the Eaton Bussmann application notes. DC fuse ratings differ from AC ratings due to the absence of natural current zero crossings, so always confirm the DC voltage and current parameters with Eaton’s published data or contact Shansen Enterprises for application support before installation.
How do I order the Eaton Bussmann 170M5811D from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 170M5811D directly from Shansen Enterprises by clicking the WhatsApp button on this page or by sending an email to our sales team. Please mention the catalog number 170M5811D, the quantity required, and your delivery location so we can provide accurate pricing and lead time. Shansen Enterprises is an authorized Eaton channel partner based in Coimbatore, supplying genuine Eaton Bussmann products with pan-India delivery to Chennai, Bangalore, Mumbai, Hyderabad, Pune, and beyond.
