Description
Overview
The Eaton Bussmann 170M8557D is a 1600 A, 690 V AC high speed square body semiconductor fuse from the renowned Bussmann 170M Series, engineered specifically for protecting semiconductor devices in high-power industrial drive and converter applications. Built to IEC 60269-4 and CE marked RoHS compliant, this fuse delivers a 200 kA breaking capacity in a DIN 43620 DIN 3 format with knife blade contacts, making it a drop-in choice for standardized panel designs. Its Class aR rating ensures ultra-fast response that safeguards IGBTs, SCRs, diodes, and other semiconductor elements before damage can occur.
Key Features
- 1600 A Amperage Rating — handles high continuous current loads in large drive and converter systems without nuisance tripping
- 690 V AC Rated Voltage — suitable for standard European and Indian 690 V industrial power distribution networks
- 200 kA Interrupt Rating — exceptional breaking capacity protects equipment even under severe fault conditions
- Class aR Rating — optimized for semiconductor protection with ultra-fast response to limit let-through energy (I²t) before device failure
- DIN 43620 DIN 3 Format with Knife Blade Contacts — standardized form factor ensures compatibility with existing DIN-rated fuse holders and busbars
- Dual Indicator Type D — provides two independent visual trip indicators for quick fault identification and reduced panel downtime
- IEC 60269-4 Compliant — meets international semiconductor fuse standards for consistent, predictable performance
- CE Marked and RoHS Compliant — ready for global installations and environmentally conscious manufacturing environments
- Bussmann 170M Series Heritage — proven platform widely specified by OEMs and panel builders across India and globally
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M8557D |
| Series | Bussmann 170M |
| Amperage Rating | 1600 A |
| Rated Voltage AC | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction | DIN 43620 DIN 3 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 170M8557D is the go-to choice for panel builders and OEMs designing protection schemes for high-power semiconductor devices operating at 690 V AC. Its Class aR characteristic means it reacts fast enough to limit fault energy before IGBTs, MOSFETs, SCRs, or diode bridges are damaged — a critical requirement in variable frequency drives (VFDs), soft starters, rectifier bridges, thyristor stacks, and DC common bus architectures commonly found in steel plants, cement works, paper mills, water treatment facilities, and renewable energy installations.
At 1600 A, this fuse is suited for large drive systems in the hundreds of kilowatts to megawatt range. The DIN 43620 DIN 3 knife blade format ensures it integrates seamlessly with compatible fuse bases and busbars already used in existing panel designs, reducing engineering rework. When replacing or specifying, always verify the fuse holder rating, busbar current capacity, and available I²t let-through values against the semiconductor device datasheet.
Across India, from Coimbatore’s textile and machine tool sector to Mumbai’s process industry and Pune’s automotive manufacturing, the Bussmann 170M Series is a recognized standard in high-power drive panels. Shansen Enterprises stocks and sources this series for industrial OEMs, EPC contractors, and maintenance teams requiring genuine, traceable Eaton product with local support.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner based in Coimbatore — direct access to genuine Bussmann products
- 100% genuine product supplied with full manufacturer warranty and traceability
- Pan-India delivery to all major cities and industrial zones
- WhatsApp technical support for application selection, cross-referencing, and installation queries
- Competitive bulk pricing for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and fuse bases (DIN 43620 DIN 3 compatible)
- Eaton Bussmann 170M Series fuses — adjacent current ratings (1400 A, 1800 A) for system design flexibility
- DIN 3 knife blade busbars and mounting hardware
- Indicator microswitch accessories for remote trip signaling (Type D indicator compatible)
- Eaton semiconductor fuse monitoring and alarm modules
- Surge protective devices (SPDs) for complementary panel protection
Frequently Asked Questions
What is the difference between a Class aR fuse and a Class gR fuse?
A Class aR fuse is a partial-range semiconductor protection fuse that operates only for fault currents above a defined threshold, relying on an upstream back-up fuse for overload protection. A Class gR fuse is a full-range device that handles both overload and short-circuit conditions independently. For semiconductor protection where response speed to high fault currents is the priority — such as in VFDs, rectifiers, and thyristor stacks — Class aR fuses like the 170M8557D are the standard selection because they limit let-through energy (I²t) more effectively at high fault levels.
Can the Eaton Bussmann 170M8557D be used for DC applications?
The 170M8557D carries an AC voltage rating of 690 V under IEC 60269-4. While many 170M Series fuses are also rated for DC applications, you must verify the specific DC voltage and current rating from the official Eaton datasheet for catalog number 170M8557D before using it in a DC circuit. Using a fuse beyond its published DC rating is unsafe and non-compliant. Contact Shansen Enterprises for technical clarification or to obtain the product datasheet.
What does the Dual Indicator Type D mean on this fuse?
The Dual Indicator (Type D) feature means the 170M8557D is fitted with two independent visual blown indicators — small striker pins or flags that visibly extend when the fuse operates. This dual arrangement allows maintenance personnel to confirm fuse operation from multiple viewing angles in a panel, reducing the time needed to identify a blown fuse during troubleshooting. Some Type D indicators are also compatible with microswitch accessories that can send a remote alarm signal to a control system.
Is the 170M8557D a direct replacement for other DIN 43620 DIN 3 format fuses?
The DIN 43620 DIN 3 knife blade format is a standardized physical format, so the 170M8557D will fit any compatible DIN 3 fuse holder or base designed for that body size. However, electrical interchangeability requires matching amperage, voltage rating, fuse class, and I²t characteristics to the original specification. Always cross-reference the electrical parameters — not just the physical dimensions — before substituting fuses in a semiconductor protection circuit. Shansen Enterprises can assist with cross-referencing and application verification.
Which industries in India commonly use the Eaton Bussmann 170M Series fuses?
The Bussmann 170M Series including the 170M8557D is widely used across India in sectors such as steel and metals (large drive systems for rolling mills and furnaces), cement manufacturing (kiln and conveyor drives), textile machinery (high-power spindle drives common in Coimbatore and Tirupur), water and wastewater treatment (pump VFDs), automotive manufacturing (robotic and press line drives), and renewable energy (solar inverters and wind converter systems). Panel builders and OEMs across Chennai, Pune, Ahmedabad, Hyderabad, and Coimbatore regularly specify this series.
How do I order the Eaton Bussmann 170M8557D from Shansen Enterprises?
You can reach Shansen Enterprises directly via WhatsApp or email using the contact buttons on this page. Share the catalog number 170M8557D along with your required quantity, delivery location, and any technical queries. As an authorized Eaton channel partner in Coimbatore, we supply genuine 170M Series fuses with full warranty and can arrange pan-India delivery. We also offer bulk pricing for panel builders, EPCs, and OEMs placing regular orders.
