Description
Overview
The Eaton Bussmann 40FE is a single-barrel, high speed BS88 type semiconductor protection fuse rated at 40A and 690V AC (450V DC), offering a 200 kA breaking capacity under Class aR classification per BS88 Part 4 and IEC 60269-4. Engineered for rapid current interruption, it protects sensitive power semiconductor devices — including thyristors, IGBTs, diodes, and SCRs — from destructive overcurrents before damage can occur. This fuse is part of the established Bussmann FE series, widely specified by panel builders and OEMs across India for semiconductor-based drive and converter applications.
Key Features
- High Speed Clearing Action — Ultra-fast I²t characteristics protect semiconductors that standard fuses cannot adequately safeguard
- 200 kA Breaking Capacity — Handles extremely high prospective short-circuit currents safely
- Dual Voltage Rating: 690V AC / 450V DC — Suitable for both AC and DC circuit applications including common bus and battery-backed systems
- Class aR Classification — Purpose-rated for semiconductor protection, not general-purpose duty, ensuring correct selectivity
- BS88 Part 4 / IEC 60269-4 Compliance — Meets internationally recognized standards for high speed fuse links
- Single Barrel Construction — Compact, straightforward mounting in standard BS88 fuse holders and carriers
- CE Marked & RoHS Compliant — Ready for export-oriented panel builds and CE-certified machinery
- IEC Rated & UL Recognized — Dual certification supports both Indian and export market installations
- Bussmann FE Series — Backed by Eaton’s global engineering and quality manufacturing standards
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 40FE |
| Series | Bussmann FE |
| Fuse Type | High Speed British Standard, Single Barrel |
| Amperage Rating | 40 A |
| Rated Voltage AC | 690 V |
| Rated Voltage DC | 450 V |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Standard | BS88 Part 4, IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL Recognized |
| Application | Semiconductor protection, DC drives, VFDs, power converters, rectifiers, soft starters, thyristor stacks, DC common bus |
Applications & Selection Guide
The 40FE is the correct choice when a 40A protection element is required ahead of semiconductor devices in AC drive panels, VFD input/output stages, rectifier bridges, thyristor stacks, and soft starter assemblies operating on 690V AC or 450V DC systems. Class aR fuses are specifically characterized for semiconductor protection — they are not interchangeable with general-purpose Class gG fuses and must be selected based on the semiconductor’s published I²t and peak let-through current ratings to ensure coordination.
In Indian industrial installations, this fuse is commonly specified in heavy manufacturing, steel plants, chemical process plants, textile mills, and water treatment facilities in Coimbatore, Pune, Chennai, Ahmedabad, and across the country — wherever variable speed drives and power converters drive critical loads. When sizing, always verify that the fuse’s I²t (melting) value is lower than the semiconductor’s withstand I²t, and that the voltage and current ratings match the circuit parameters including any DC bus voltage under regenerative conditions.
For DC common bus applications operating at 450V DC, the 40FE’s DC voltage rating must be confirmed against the actual bus voltage including ripple. Consult Shansen Enterprises’ technical team for application-specific selection guidance and cross-reference with your VFD or drive manufacturer’s fuse recommendation table.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — 100% genuine product with full traceability
- Genuine Eaton Bussmann products supplied with manufacturer warranty
- Pan-India delivery to all major industrial cities and tier-2 locations
- WhatsApp technical support for fuse selection, cross-reference, and sizing queries
- Competitive bulk pricing for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- BS88 Part 4 fuse holders and carriers compatible with FE series single barrel fuses
- Other Bussmann FE series ratings (e.g., 20FE, 32FE, 50FE, 63FE, 80FE) for panel multi-circuit builds
- Eaton Bussmann fuse base and DIN rail fuse holders for BS88 single barrel fuses
- Eaton contactors and circuit breakers for upstream protection coordination
- Eaton Bussmann NH series fuses for upstream feeder protection upstream of semiconductor fuses
Frequently Asked Questions
What is the difference between Class aR and Class gG fuses for semiconductor protection?
Class gG fuses are general-purpose fuses designed for cable and general circuit protection with a relatively slower clearing action. Class aR fuses — like the Eaton Bussmann 40FE — are specifically designed for semiconductor protection with a much faster melting and clearing characteristic, ensuring that the fuse clears the fault current before the semiconductor device (thyristor, IGBT, diode, or SCR) is thermally damaged. Using a gG fuse in place of an aR fuse in a VFD or rectifier application will not provide adequate semiconductor protection and may result in device failure.
Can the 40FE be used in a DC common bus application?
Yes. The Eaton Bussmann 40FE has a rated DC voltage of 450V, making it suitable for DC common bus applications where the bus voltage does not exceed this value. Always verify the actual DC bus voltage including maximum ripple and regenerative overvoltage conditions before applying this fuse on a DC circuit. For DC bus voltages above 450V, a higher DC-rated fuse must be selected.
What fuse holder is compatible with the Eaton Bussmann 40FE single barrel fuse?
The 40FE uses a standard BS88 Part 4 single barrel form factor and is compatible with fuse holders and carriers designed for this mounting style. Please contact Shansen Enterprises with your panel layout details — our team will confirm the correct Eaton Bussmann fuse holder, base, or DIN rail carrier to match the 40FE’s physical dimensions and current rating.
Is the 40FE suitable for use in VFD input protection in India?
Yes, the Eaton Bussmann 40FE is widely used for input-side semiconductor protection in Variable Frequency Drive (VFD) panels across India. When applied at the VFD input, the fuse protects the rectifier bridge diodes from short-circuit damage. Always cross-reference with the VFD manufacturer’s fuse recommendation — most specify the required I²t value and peak let-through current limit, which must be matched to the fuse’s published characteristics. The 40FE’s 200 kA breaking capacity is well-suited for installations on 690V industrial power systems.
Does the Eaton Bussmann 40FE comply with IEC and CE requirements for industrial panels?
Yes. The 40FE is IEC Rated per IEC 60269-4, CE Marked, and RoHS Compliant, meeting the requirements for industrial control panels intended for use in India and for export to European markets. It is also UL Recognized, which supports projects requiring dual compliance documentation. Certificates and compliance documentation can be provided upon request through Shansen Enterprises.
How do I order the Eaton Bussmann 40FE from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 40FE directly from Shansen Enterprises by clicking the WhatsApp button or the email quote button on this page. Please mention the catalog number 40FE, required quantity, and your delivery location anywhere in India. Our team in Coimbatore will respond promptly with pricing, availability, and lead time. Bulk orders from panel builders and OEMs are welcome and attract preferential pricing.
