Description
Overview
The Eaton Bussmann 71FE is a single barrel, high speed BS88 Type semiconductor protection fuse from the Bussmann FE Series, engineered to safeguard expensive power semiconductor devices against damaging fault currents. Rated at 71 A and 690 V AC / 450 V DC with a 200 kA breaking capacity and Class aR classification, this fuse delivers the rapid current limitation necessary to protect thyristors, IGBTs, and diodes before they can be destroyed. It meets IEC 60269-4 and BS88 Part 4 standards and carries CE marking, RoHS compliance, IEC rating, and UL recognition.
Key Features
- Class aR Rating — Purpose-built for semiconductor protection with fast-acting current limiting characteristics that prevent device damage.
- 200 kA Breaking Capacity — Handles extremely high prospective fault currents common in industrial power systems across India.
- Dual Voltage Rating (AC & DC) — Rated 690 V AC and 450 V DC, making it suitable for both AC drive systems and DC bus applications.
- 71 A Amperage Rating — Precisely selected current rating ensures optimal protection for semiconductor devices in the target power range.
- Single Barrel Construction — Compact form factor simplifies panel layout and reduces overall cabinet footprint.
- CE Marked & RoHS Compliant — Meets European safety and environmental directives, ensuring compliance for export-oriented equipment manufacturers.
- IEC Rated & UL Recognized — Dual certification supports deployment in both IEC and UL-specified installations.
- BS88 Part 4 / IEC 60269-4 Compliant — Manufactured to the international standard for high speed fuses used in semiconductor protection.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 71FE |
| Series | Bussmann FE |
| Fuse Type | High Speed British Standard, Single Barrel |
| Fuse Class | Class aR |
| Amperage Rating | 71 A |
| Rated Voltage AC | 690 V |
| Rated Voltage DC | 450 V |
| Breaking Capacity | 200 kA |
| 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 Eaton Bussmann 71FE is the correct choice when protecting power semiconductor devices — such as SCRs, thyristors, IGBTs, and diodes — in high-power industrial equipment. Its Class aR characteristic means it is specifically designed to operate before the semiconductor device’s I²t withstand limit is exceeded, providing protection that general-purpose fuses simply cannot deliver. This fuse is suitable for use in AC and DC drive panels, VFD input/output protection, rectifier bridges, soft starters, and DC common bus architectures operating at up to 690 V AC or 450 V DC.
In Indian industrial environments — including automotive manufacturing, textile machinery, steel plants, petrochemical facilities, and large commercial HVAC systems in cities like Coimbatore, Chennai, Pune, and Ahmedabad — power electronics are routinely exposed to harsh supply conditions and high fault levels. The 71FE’s 200 kA breaking capacity ensures it can safely clear faults even on stiff, low-impedance industrial supplies. Panel builders and OEMs specifying equipment for export markets benefit from its simultaneous IEC and UL recognition.
When selecting this fuse, verify that the continuous current of the protected semiconductor circuit does not exceed 71 A, and that the supply voltage is within 690 V AC or 450 V DC. Always cross-reference the fuse I²t let-through value against the semiconductor manufacturer’s rated I²t withstand to confirm co-ordination. Consult Shansen Enterprises for application-specific guidance and compatible fuse holders.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — supplying genuine Bussmann fuses across Tamil Nadu and India
- 100% genuine products with full manufacturer warranty
- Pan-India delivery including remote industrial locations
- WhatsApp technical support for fuse selection, co-ordination, and replacement queries
- Bulk pricing and credit terms available for panel builders, OEMs, and EPC contractors
Compatible Products & Accessories
- Eaton Bussmann FE Series fuse holders and base assemblies compatible with single barrel BS88 high speed fuses
- Eaton Bussmann complementary FE Series fuses in adjacent current ratings (63FE, 80FE, 100FE) for system co-ordination
- Semiconductor protection fuse links for three-phase rectifier bridge protection (full set of six)
- Eaton DIN-rail and panel-mount fuse bases rated for 690 V AC / 450 V DC
- Eaton surge protection devices (SPDs) for upstream protection of power electronics panels
- Thermal monitoring and fuse blown indicators compatible with BS88 high speed fuse installations
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 71FE fuse?
Class aR (restricted range) is an IEC fuse class defined in IEC 60269-4 specifically for semiconductor protection. Unlike general-purpose gG fuses, a Class aR fuse is designed to operate extremely rapidly — limiting the let-through energy (I²t) to a value below the thermal withstand limit of the protected semiconductor device. The 71FE carries this aR classification, confirming it is suitable only for back-up or full-range semiconductor protection, not for overload protection of cables or motors. A separate overload protective device must be provided in the circuit where required.
Can the Eaton Bussmann 71FE be used on DC applications?
Yes. The 71FE carries a DC voltage rating of 450 V DC in addition to its 690 V AC rating. This makes it directly suitable for protecting semiconductor devices in DC drive systems, DC common bus architectures, battery energy storage interfaces, and rectifier outputs operating up to 450 V DC. Always confirm that the actual DC circuit voltage does not exceed 450 V DC and that the circuit’s fault current level is within the 200 kA breaking capacity of this fuse.
What is the breaking capacity of the 71FE and why does it matter?
The Eaton Bussmann 71FE has a breaking capacity of 200 kA. This is the maximum prospective fault current the fuse can safely interrupt without rupturing or causing downstream hazards. In Indian industrial installations — particularly in large factories, substations, and drive panels connected close to power transformers — prospective fault currents can be very high. A 200 kA rated fuse ensures the protection device itself does not become a source of danger during a fault event, meeting the requirements of IEC 60269-4 and installation standards.
Which fuse holder is compatible with the Eaton Bussmann 71FE?
The 71FE is a single barrel BS88 Type high speed fuse and requires a fuse holder or base assembly rated and dimensioned for the Bussmann FE Series. The holder must be rated for at least 690 V AC / 450 V DC and an appropriate continuous current. Eaton offers dedicated fuse holders for the FE Series range. Please contact Shansen Enterprises with your panel layout details and we will confirm the correct holder catalog number and availability in Coimbatore or for delivery across India.
Is the Eaton Bussmann 71FE RoHS and CE compliant?
Yes. The 71FE is both CE Marked and RoHS Compliant, and additionally carries IEC Rated and UL Recognized certifications. CE marking confirms conformity with applicable European directives. RoHS compliance confirms the fuse does not contain restricted hazardous substances, which is increasingly required by export-oriented equipment manufacturers and multinational companies operating in India. UL recognition broadens its suitability for projects where UL-listed or UL-recognized components are specified.
How do I order the Eaton Bussmann 71FE from Shansen Enterprises?
Ordering the Eaton Bussmann 71FE from Shansen Enterprises is straightforward. You can reach us via WhatsApp or email using the contact buttons on this page — simply quote catalog number 71FE along with the quantity required. Our team in Coimbatore will confirm stock availability, provide a competitive price, and arrange delivery to your location anywhere in India. For bulk orders, panel builder accounts, or ongoing project requirements, ask about our trade pricing and scheduled supply arrangements.
