Description
Overview
The Eaton Bussmann 170M4186 is a high speed square body semiconductor fuse rated 400 A at 690 V AC, delivering a 200 kA breaking capacity under IEC 60269-4. Built in the DIN 43620 DIN 1 format with knife blade contacts, this Class gR fuse provides reliable short-circuit protection for power semiconductor devices in demanding industrial drive and converter applications. It is CE marked and RoHS compliant, making it suitable for use in modern Indian and global electrical panels.
Key Features
- High Speed Operation — Pre-arcing characteristics sized specifically for semiconductor protection, limiting I²t damage to thyristors, diodes, and IGBTs
- 400 A Current Rating — Handles high continuous loads typical in industrial drive panels and rectifier stacks
- 690 V AC Voltage Rating — Compatible with standard 415 V and 690 V distribution systems used across Indian industries
- 200 kA Breaking Capacity — Interrupts the highest available fault currents found in medium-power industrial installations
- Class gR Rating — Full-range current-limiting fuse optimised for semiconductor protection duty cycles
- DIN 43620 DIN 1 Format with Knife Blade Contacts — Drop-in compatible with standard DIN 1 fuse holders and bus bar assemblies
- No Fuse Indicator — Simplifies mounting in compact panel designs where indicator accessories are not required
- CE Marked and RoHS Compliant — Meets European and international environmental and safety directives
- IEC Certified — Tested and rated under IEC 60269-4 for semiconductor fuse applications
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M4186 |
| Series | Bussmann 170M |
| Amperage Rating | 400 A |
| Voltage Rating (AC) | 690 V |
| Breaking Capacity | 200 kA |
| Interrupt Rating | 200 kA |
| Fuse Class | Class gR |
| Construction | DIN 43620 DIN 1 format, knife blade contacts |
| Fuse Indicator | None |
| 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 170M4186 is the preferred choice for engineers protecting power semiconductor devices in industrial drive systems. Its Class gR rating means it is a full-range current-limiting fuse specifically characterised for semiconductor duty — providing both overload and short-circuit protection for thyristors, SCRs, diodes, and IGBT modules in rectifier bridges, DC common bus configurations, and AC-to-DC power converters. At 400 A and 690 V, it fits squarely into medium-power drive panels typically found in steel plants, paper mills, water treatment facilities, and cement factories across India.
When selecting a semiconductor fuse, engineers must verify that the fuse I²t (let-through energy) is lower than the withstand I²t of the semiconductor device being protected. The 170M4186’s 200 kA breaking capacity ensures it can safely clear even the most severe bolted fault conditions on 690 V bus systems. Its DIN 43620 DIN 1 knife blade format allows direct replacement in existing fuse holders without modification, reducing panel redesign time during maintenance or upgrades.
In the Indian industrial context, this fuse is widely specified for VFD and soft starter panels in manufacturing, pumping stations, HVAC systems, and renewable energy inverter assemblies. Panels built to IEC standards in Coimbatore, Chennai, Pune, and other industrial hubs regularly use the Bussmann 170M series for semiconductor protection in both OEM and retrofit applications. Shansen Enterprises stocks and supplies the 170M series to panel builders, system integrators, and maintenance teams across Tamil Nadu and pan-India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products, not grey market
- 100% genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery to Tamil Nadu, Maharashtra, Gujarat, Karnataka, Telangana, and beyond
- WhatsApp technical support for fuse selection, replacement cross-reference, and sizing queries
- Bulk pricing available for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann 170M Series DIN 1 fuse holders and base assemblies
- Bussmann 170M series knife blade fuse carriers for panel mounting
- Eaton DIN 43620 bus bar adapters and finger-safe fuse carriers
- Complementary 170M series fuses in adjacent ratings (315 A, 500 A) for coordinated protection
- Eaton semiconductor contactors and DC bus protection components
- Fuse monitoring relay accessories for alarm and trip indication
Frequently Asked Questions
What is the difference between a Class gR fuse and a Class aR fuse for semiconductor protection?
A Class gR fuse is a full-range current-limiting fuse that provides both overload and short-circuit protection for semiconductor devices, making it suitable where the fuse is the only protective device in the circuit. A Class aR fuse is a partial-range fuse intended only for short-circuit back-up protection and must be used in combination with another device — such as a circuit breaker or contactor — to handle overload conditions. The Eaton Bussmann 170M4186 is rated Class gR, so it can be used as a standalone protective device for thyristors, diodes, and IGBT modules in drive and converter panels.
Is the 170M4186 suitable for protecting VFDs and soft starters on a 415 V Indian supply system?
Yes. The 170M4186 is rated for 690 V AC, which means it is fully compatible with 415 V three-phase systems standard in India — the higher voltage rating provides additional safety margin. At 400 A, it is sized for the input or output protection of medium to large VFDs and soft starters. Always verify the fuse I²t against the semiconductor device manufacturer’s specified withstand I²t before finalising selection. Shansen Enterprises can assist with application-specific fuse sizing for your drive panel requirements.
What fuse holder is compatible with the Eaton Bussmann 170M4186?
The 170M4186 uses the DIN 43620 DIN 1 format with knife blade contacts. It is compatible with Eaton Bussmann DIN 1 fuse holders, base assemblies, and panel-mount carriers designed for the 170M series. When sourcing holders, confirm the current rating, voltage rating, and physical DIN size (DIN 1 in this case) match the fuse specification. Contact Shansen Enterprises for holder and accessory recommendations to complete your panel build.
What does the 200 kA breaking capacity mean for panel design?
The 200 kA breaking capacity means the 170M4186 can safely interrupt a prospective fault current of up to 200 kA without rupturing, without releasing hazardous arc energy, and without damaging adjacent components. In practical terms, this exceeds the available fault levels at almost all industrial LV distribution boards in India, giving engineers full confidence that the fuse will clear any fault safely. This rating is particularly important in high-power rectifier and DC bus panels fed from large transformers where available fault current can be very high.
Does the Eaton Bussmann 170M4186 come with a fuse indicator or striker pin?
No. The 170M4186 is supplied without a fuse indicator or striker pin. If your panel design requires visual blown-fuse indication or a microswitch trip signal, you should consider alternative variants within the Bussmann 170M series that include an integrated indicator or striker. Shansen Enterprises can help you identify the correct 170M series variant with the indicator option that suits your application.
How do I order the Eaton Bussmann 170M4186 from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 170M4186 directly from Shansen Enterprises by clicking the WhatsApp button on this page or sending an email to our sales team. Please mention the catalog number 170M4186, required quantity, and your delivery location. We supply genuine Eaton Bussmann products with full warranty across Coimbatore, Tamil Nadu, and all major cities in India including Chennai, Bangalore, Mumbai, Pune, Hyderabad, and Delhi. Bulk orders and repeat supply contracts for panel builders and OEMs are welcome.
