Description
Overview
The Eaton Bussmann 35FE is a single barrel, high speed BS88 type semiconductor protection fuse from the Bussmann FE Series, rated 35 A at 690 V AC and 450 V DC. It delivers a 200 kA breaking capacity with Class aR characteristics, ensuring extremely fast clearing times that protect power semiconductors before they sustain damage under fault conditions. Compliant with BS88 Part 4 and IEC 60269-4, the 35FE meets global standards for semiconductor fuse applications across industrial automation and power conversion equipment in India and internationally.
Key Features
- High Speed Class aR Response — Clears faults in microseconds, protecting thyristors, IGBTs, SCRs, and diodes from destructive I²t energy.
- 200 kA Breaking Capacity — Handles extreme prospective short-circuit currents typical in industrial power systems.
- 690 V AC / 450 V DC Dual Voltage Rating — Suitable for both AC and DC power conversion circuits including common bus DC drives.
- Single Barrel BS88 Form Factor — Compact, single barrel body fits standard BS88 Part 4 fuse holders and base assemblies.
- IEC 60269-4 Compliant — Meets the international standard specifically for fuses protecting semiconductor devices.
- CE Marked and RoHS Compliant — Ready for installation in CE-certified panels and compliant with hazardous substance regulations.
- IEC Rated and UL Recognized — Dual certification supports export-oriented OEM equipment and global machine builders.
- Eaton Bussmann FE Series Reliability — Backed by Eaton’s proven fuse manufacturing expertise for consistent performance in critical protection roles.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 35FE |
| Series | Bussmann FE |
| Fuse Type | High Speed British Standard Single Barrel |
| Amperage Rating | 35 A |
| Voltage Rating (AC) | 690 V |
| Voltage Rating (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 |
| Body Configuration | Single Barrel |
| Application | Semiconductor protection, DC drives, VFDs, power converters, rectifiers, soft starters, thyristor stacks, DC common bus |
Applications & Selection Guide
The Eaton Bussmann 35FE is specified wherever power semiconductors must be protected from short-circuit faults in industrial power electronics. Typical installations include variable frequency drives (VFDs), DC motor drives, thyristor firing circuits, rectifier bridges, soft starters, IGBT-based inverters, and DC common bus systems operating at up to 690 V AC or 450 V DC. The 35 A rating makes it appropriate for protecting individual semiconductor modules or parallel strings in medium-power converter designs.
Class aR fuses are specifically engineered for semiconductor protection and must not be substituted with general-purpose gG or gM fuses. The aR characteristic provides a limited range of breaking current — intended to operate only under high overload and short-circuit conditions — meaning they must always be coordinated with a backup fuse or circuit breaker for overload protection of the circuit. When selecting the 35FE, ensure that the let-through I²t value is below the semiconductor device’s rated I²t withstand rating as specified in the device datasheet.
In Indian industries, the Bussmann 35FE is widely used in steel plant DC drive panels, textile mill inverter systems, chemical plant rectifiers, water treatment variable speed pump drives, renewable energy power conditioning, and OEM panel builders across Coimbatore, Pune, Ahmedabad, and Chennai who manufacture CE-certified export machinery. Its UL Recognized status also simplifies certification for equipment destined for North American markets.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — guaranteed genuine product with full traceability
- 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 fuse selection, coordination studies, and replacement cross-referencing
- Bulk pricing and credit terms available for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- BS88 Part 4 single barrel fuse holders and bases compatible with the FE series body dimensions
- Eaton Bussmann FE Series fuses in adjacent ratings (25FE, 40FE, 50FE, 63FE) for system coordination
- Eaton Bussmann backup fuses (gG class) for overload protection upstream of the 35FE
- Semiconductor fuse monitoring and blown fuse indication accessories
- DIN rail and panel-mount fuse holder assemblies rated for 690 V AC / 450 V DC service
- Eaton Bussmann high speed fuse blocks and modular fuse systems for converter panel assemblies
Frequently Asked Questions
What does Class aR mean and how is the 35FE different from a standard gG fuse?
Class aR (current limiting, restricted range) fuses are designed exclusively for semiconductor protection. Unlike gG fuses which protect conductors across a full range from overload to short circuit, aR fuses only operate under high overcurrent and short-circuit conditions, clearing faults in microseconds to prevent semiconductor junction damage. The 35FE must therefore always be used alongside a backup gG or gM fuse or circuit breaker that handles overload protection for the circuit conductors.
Can the Eaton Bussmann 35FE be used in DC drive applications?
Yes. The 35FE carries a 450 V DC voltage rating, making it suitable for use in DC common bus drives, DC motor drive input circuits, rectifier bridges, and similar DC power conversion equipment. Always verify that the DC system voltage does not exceed 450 V DC and that the available fault current is within the 200 kA breaking capacity of the fuse.
What is the I²t value of the 35FE and how do I verify semiconductor compatibility?
The specific melting I²t and total clearing I²t values for the 35FE are available in the Eaton Bussmann FE Series datasheet. To verify compatibility, compare the fuse’s total clearing I²t at the prospective fault current level against the semiconductor device’s rated I²t withstand value (published in the semiconductor manufacturer’s datasheet). The fuse I²t must be lower than the semiconductor’s rated withstand I²t to ensure the fuse clears the fault before the semiconductor is damaged. Contact Shansen Enterprises for datasheet assistance.
Is the 35FE suitable for VFD input or output protection?
The 35FE is typically applied on the DC bus or AC input side for semiconductor-level protection within VFD power stages, not as a general-purpose line-side fuse. For line-side input protection of VFDs, gG or gR class fuses rated for the full load current may be more appropriate. For internal semiconductor protection of the rectifier diodes, IGBT modules, or thyristors within the drive, the aR-class 35FE is the correct choice. Consult the VFD manufacturer’s fuse selection guide to confirm the appropriate rating and class for each protection point.
Does the 35FE comply with CE and RoHS requirements for export panel builders?
Yes. The Eaton Bussmann 35FE is CE Marked and RoHS Compliant, meeting the requirements of the EU Low Voltage Directive and the Restriction of Hazardous Substances Directive. It is also IEC Rated and UL Recognized, supporting compliance documentation for panels and equipment exported to European and North American markets. Declaration of conformity and certification documents are available upon request from Shansen Enterprises.
How do I order the Eaton Bussmann 35FE from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 35FE directly from Shansen Enterprises by clicking the WhatsApp button on this page or emailing us through the contact form. Please mention catalog number 35FE, required quantity, and your delivery location anywhere in India. Our team will respond with pricing, availability, and estimated delivery lead time. Bulk orders for panel builders and OEMs in Coimbatore and across India are welcome, and we offer competitive pricing for repeat purchase agreements.
