Description
Overview
The Eaton Bussmann 170M4987 is a 500 A, 1000 V AC high speed semiconductor fuse belonging to Eaton’s trusted 170M Series. Designed specifically for the protection of silicon-controlled rectifiers, IGBTs, MOSFETs, and other power semiconductor devices, this Class aR fuse provides ultra-fast fault clearing with an interrupt rating of 200 kA. Its square body 1TN/110 format with bolt-in connections makes it a preferred choice for panel builders and OEMs assembling drives, converters, and power electronics systems across India.
Key Features
- 500 A Amperage Rating — Handles high continuous current loads typical of industrial VFDs, rectifiers, and converter stages.
- 1000 V AC Rated Voltage — Suitable for medium-voltage semiconductor protection circuits in industrial power systems.
- 200 kA Interrupt Rating — High breaking capacity ensures reliable fault clearing under worst-case short-circuit conditions.
- Class aR Fuse — Optimised exclusively for semiconductor protection with sub-cycle response times to prevent device destruction.
- Square Body 1TN/110 Format — Industry-standard form factor enabling direct replacement and ease of integration into existing panel designs.
- Bolt-In Connections — Secure, low-resistance connections that minimise contact resistance and heat generation in service.
- IEC 60269-4 Compliant — Certified to the international standard for semiconductor fuses, ensuring interoperability and compliance.
- CE Marked and RoHS Compliant — Meets European regulatory requirements for both electrical safety and environmental directives.
- No Fuse Indicator — Simplified construction for cost-effective protection where remote indication is not required.
- Part of the Eaton Bussmann 170M Series — Globally recognised platform with broad accessory support and proven field reliability.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M4987 |
| Series | Bussmann 170M |
| Amperage Rating | 500 A |
| Rated Voltage AC | 1000 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction | Square body 1TN/110 format with bolt-in connections |
| 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 170M4987 is purpose-built for the protection of power semiconductor devices in high-current industrial applications. It is the correct choice wherever IGBTs, SCRs, diodes, or thyristors must be protected against destructive overcurrent faults in rectifier bridges, DC common bus architectures, variable frequency drives (VFDs), soft starters, and AC-DC power converters. The Class aR rating confirms this fuse is exclusively rated for semiconductor protection — it responds faster than general-purpose gG or gR fuses, clearing faults before semiconductor junction temperatures reach destructive levels.
At 500 A and 1000 V AC with a 200 kA breaking capacity, the 170M4987 is well matched for medium to large industrial drive systems and high-power converter stacks. Engineers specifying protection for multi-megawatt drive panels, large servo drives, or traction power conversion equipment will find this fuse meets the current and voltage requirements for such demanding duty cycles. Always verify I²t let-through values against the semiconductor manufacturer’s withstand ratings to ensure correct coordination.
In India, this fuse is widely used in industries including steel and metals processing, cement and minerals, oil and gas, paper and pulp, water and wastewater treatment, and renewable energy installations — sectors concentrated in industrial clusters around Coimbatore, Chennai, Pune, Ahmedabad, and Surat. Shansen Enterprises supplies the 170M4987 and the full Eaton Bussmann 170M Series range to panel builders, OEMs, and EPC contractors across Tamil Nadu and pan-India.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner based in Coimbatore, Tamil Nadu
- 100% genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery to all major industrial cities and tier-2 locations
- WhatsApp technical support for product selection and application queries
- Bulk pricing and priority allocation for panel builders, OEMs, and system integrators
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and fuse bases for 1TN/110 square body format
- Eaton Bussmann 170M Series fuse links at adjacent current ratings (400 A, 450 A, 630 A) for system coordination
- DIN rail mounted fuse blocks compatible with 170M square body series
- Eaton Bussmann fuse monitoring and blown-fuse indication accessories
- Copper bus bar connectors and bolt-in terminal hardware for 170M installations
- Semiconductor protection fuses for parallel or series converter configurations within the 170M range
Frequently Asked Questions
What does Class aR mean on the Eaton Bussmann 170M4987 fuse?
Class aR denotes a fuse designed exclusively for the protection of semiconductor devices such as SCRs, IGBTs, diodes, and thyristors. Unlike general-purpose Class gG fuses, a Class aR fuse operates with an extremely fast response in the partial-range current zone — clearing faults before semiconductor junctions reach their thermal destruction threshold. The 170M4987 is not intended as a general-purpose branch circuit fuse; it must always be used in conjunction with upstream branch circuit protection of the appropriate class.
What is the interrupt rating of the 170M4987 and why does it matter?
The 170M4987 carries a 200 kA interrupt rating, meaning it is capable of safely clearing fault currents up to 200 kA without rupture or arc flash hazard. This high breaking capacity is essential in industrial power systems fed from large transformers or low-impedance busbars, where prospective short-circuit currents can be extremely high. Selecting a fuse with adequate interrupt rating is a fundamental safety and compliance requirement under IEC 60269-4 and local electrical installation standards.
Can the 170M4987 be used for DC bus protection in VFD and drive panels?
Yes. The Eaton Bussmann 170M4987 is specifically listed for DC common bus and DC drive applications. When applying semiconductor fuses on a DC bus, engineers should consult the Eaton Bussmann derating guidelines for DC voltage, as the rated AC voltage does not directly translate to DC applications. Eaton’s application engineering resources and Shansen Enterprises’ technical team can assist with correct fuse selection for DC bus architectures and drive panel coordination studies.
Is the 170M4987 a direct replacement for other 170M Series fuses of the same rating?
The 170M Series uses the standardised square body 1TN/110 form factor with bolt-in connections, so physical interchangeability within the same body size and rating is generally achievable. However, engineers must always verify that the replacement fuse matches the original on amperage, voltage, fuse class, I²t characteristics, and any coordination requirements specified in the original panel design documentation. Contact Shansen Enterprises for cross-reference assistance if you are replacing a fuse from another manufacturer.
Which Indian industries commonly use the Eaton Bussmann 170M4987?
The 170M4987 is commonly specified in Indian industries that operate high-power semiconductor-based equipment. These include steel rolling mills and arc furnace installations, cement plant drive systems, paper and pulp processing lines, petrochemical and refinery motor drives, water treatment variable speed pump systems, and renewable energy inverter and converter assemblies. Shansen Enterprises regularly supplies the 170M Series to industrial customers across Coimbatore, Erode, Tiruppur, Chennai, and through pan-India logistics to other industrial hubs.
How do I order the Eaton Bussmann 170M4987 from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 170M4987 directly through Shansen Enterprises via WhatsApp or email using the contact buttons on this page. Please mention the catalog number 170M4987, your required quantity, and your delivery location. Our team will respond with pricing, availability, and estimated delivery timeline. For bulk orders, panel builder accounts, or recurring procurement, ask about our OEM pricing and priority supply arrangements. Shansen Enterprises delivers across India from our base in Coimbatore, Tamil Nadu.
