Description
Overview
The Eaton Bussmann 170M6021 is a heavy-duty, high speed square body semiconductor fuse rated at 2000 A and 550 V AC, belonging to Eaton’s widely specified 170M Series. Engineered to IEC 60269-4, this Class aR fuse delivers an interrupt rating of 200 kA, providing reliable and fast-acting protection for silicon-controlled rectifiers, IGBTs, thyristor stacks, and other power semiconductor devices. Its bolt-in square body 3/80 format construction ensures mechanical rigidity and consistent electrical contact in high-current power conversion and drive panels.
Key Features
- 2000 A Amperage Rating — handles very high continuous currents in large-scale industrial drive and converter systems
- 550 V AC Rated Voltage — compatible with standard 400 V and 480 V industrial power systems with adequate voltage margin
- 200 kA Interrupt Rating — exceptional fault current clearing capability protects upstream and downstream components from catastrophic damage
- Class aR Fuse Classification — optimised for semiconductor protection, offering the fast response times that gG fuses cannot provide
- Square Body 3/80 Format with Bolt-In Connections — rigid, vibration-resistant mounting that maintains low contact resistance in high-vibration industrial environments
- IEC 60269-4 Compliant — internationally recognised standard ensures interoperability with IEC-rated equipment and panels
- UL Recognised and CE Marked — simplifies approval processes for both domestic Indian and export-oriented machinery
- RoHS Compliant — meets environmental compliance requirements for CE-marked equipment sold in regulated markets
- No Fuse Indicator — clean panel design where external monitoring or relay-based fuse supervision is used instead
- Eaton Bussmann 170M Series Pedigree — a globally proven series used extensively in OEM power electronics, traction, and industrial drive applications
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M6021 |
| Series | Bussmann 170M |
| Amperage Rating | 2000 A |
| Rated Voltage AC | 550 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction | Square body 3/80 format with bolt-in connections |
| Fuse Indicator | None |
| Standard | IEC 60269-4 |
| Certifications | IEC Rated, UL Recognised |
| Compliances | CE Marked, RoHS Compliant |
| Application | Semiconductor protection, DC common bus, DC drives, power converters, rectifiers, VFDs, soft starters, thyristor stacks |
Applications & Selection Guide
The 170M6021 is the correct selection for engineers specifying semiconductor fuse protection in high-current VFD panels, DC common bus drive systems, industrial rectifiers, and power converter assemblies operating at up to 550 V AC. At 2000 A, this fuse addresses the largest current levels encountered in heavy industrial drives, steel plant converters, paper mill drives, and large UPS or STATCOM systems. Its Class aR rating means it is designed exclusively for the protection of semiconductor devices — it will not serve as a general-purpose branch circuit fuse, and engineers must verify that upstream protection addresses overload conditions independently.
In Indian industrial installations — particularly in automotive manufacturing, textiles, cement, steel, and chemical processing plants in regions such as Coimbatore, Pune, Ahmedabad, and Chennai — high speed semiconductor fuses are essential wherever SCRs, IGBTs, and diode bridges are used in variable speed drives and soft starters. The 170M6021’s bolt-in square body format integrates directly into Eaton-compatible and custom OEM busbar assemblies, making it a preferred choice for panel builders and OEM drive manufacturers across India.
When selecting this fuse, confirm that the I²t let-through value of the 170M6021 is equal to or less than the I²t withstand rating of the semiconductor device being protected. Consult the Eaton Bussmann 170M Series datasheet or contact Shansen Enterprises for application engineering support in matching this fuse to your specific drive or converter topology.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — supplying genuine Eaton Bussmann products with full traceability
- 100% genuine products with manufacturer warranty — no grey market or counterfeit risk
- Pan-India delivery — reliable dispatch to all major industrial cities and tier-2 locations
- WhatsApp technical support — get application guidance and cross-reference assistance quickly
- Bulk pricing for panel builders and OEM manufacturers — competitive rates for project and recurring orders
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and mounting bases compatible with 3/80 square body format
- Eaton Bussmann 170M Series fuses in adjacent current ratings (1600 A, 1800 A) for coordinated protection
- Eaton semiconductor fuse monitoring relays for panels where fuse indication is required externally
- Eaton busbar systems and connection hardware rated for 2000 A applications
- Eaton Bussmann DIN-rail fuse holders for auxiliary control circuit protection in drive panels
Frequently Asked Questions
What is the difference between a Class aR and a Class gG fuse for semiconductor protection?
A Class gR or aR fuse is specifically designed to provide fast-acting protection for semiconductor devices such as thyristors, SCRs, and IGBTs. Unlike Class gG general-purpose fuses, which are designed to protect cables and equipment from overloads and short circuits, Class aR fuses operate extremely quickly under fault conditions to limit the energy (I²t) let-through to a level that the semiconductor can survive. The 170M6021 is Class aR, making it the correct choice wherever semiconductor device protection is the primary requirement. Using a gG fuse in its place would likely result in semiconductor failure before the fuse clears.
Is the Eaton Bussmann 170M6021 suitable for DC bus applications in VFD systems?
Yes. The 170M6021 is explicitly rated and applied for DC common bus and DC drive protection. However, engineers must confirm the DC voltage rating from the Eaton Bussmann 170M6021 datasheet for their specific DC bus voltage level, as AC and DC voltage ratings differ. Contact Shansen Enterprises for the detailed datasheet and application support to confirm suitability for your DC bus voltage.
What does the square body 3/80 format mean for mounting and replacement?
The 3/80 designation refers to the standardised square body format dimensions used in the Eaton Bussmann 170M Series. This format defines the physical size, bolt hole spacing, and connection geometry of the fuse body, ensuring direct interchangeability with compatible 170M Series fuse holders and busbars. When replacing an existing 170M Series fuse of the same format, you must match the catalog number exactly to ensure correct current rating, voltage rating, and I²t characteristics — dimensional compatibility alone does not guarantee electrical equivalence.
Does the 170M6021 include a built-in fuse indicator?
No. The Eaton Bussmann 170M6021 does not include an integral fuse indicator. For panels where blown-fuse detection is required, engineers should specify an external fuse monitoring relay or use a variant from the 170M Series that includes an optional indicator pin. Shansen Enterprises can assist in identifying the correct indicator-equipped variant or compatible monitoring relay for your panel design.
What certifications does the Eaton Bussmann 170M6021 carry?
The 170M6021 is IEC Rated to IEC 60269-4 and UL Recognised, and it carries CE Marking and RoHS compliance. These certifications make it suitable for use in equipment sold in European CE-marked markets, IEC-standard Indian industrial installations, and machinery exported to North American markets where UL recognition is required. Genuine certification documentation is available from Shansen Enterprises upon request.
How do I order the Eaton Bussmann 170M6021 from Shansen Enterprises?
You can request a quote directly by clicking the WhatsApp button or the email enquiry button on this page. Please mention the catalog number 170M6021, your required quantity, and your delivery location in India. Shansen Enterprises, the authorized Eaton channel partner in Coimbatore, will respond promptly with pricing, availability, and estimated delivery timeline. Bulk and project orders are welcome, and our technical team can assist with application queries or cross-reference support before you confirm your order.
