Lovato FB03A3N four-pole 3P+N DIN rail fuse holder for 22 x 58 mm cylindrical fuses, rated 100 A under IEC standards and 125 A under UL and CSA standards at 690 V AC.
£130.93
The Lovato FB03A3N is a durable four-pole cylindrical fuse holder designed for 22 × 58 mm fuse links in industrial power distribution, machinery and electrical control applications. Its 3P+N configuration allows three phase conductors and the neutral conductor to be managed within one coordinated DIN rail mounted device.
Part of the Lovato Electric FB range, the FB03A3N provides a secure and accessible mounting solution for replaceable cylindrical fuses. It is rated at 100 A under IEC requirements and up to 125 A under UL and CSA requirements, making it suitable for demanding low-voltage installations operating at up to 690 V AC.
The FB03A3N occupies four modular spaces and is designed for installation on a standard DIN rail inside an appropriate electrical enclosure. This version is supplied without a blown-fuse status indicator and features simultaneous neutral conductor switching for coordinated isolation of three-phase and neutral circuits.
The Lovato FB03A3N provides secure mounting and electrical connection for cylindrical fuse links protecting three-phase and neutral circuits. When correctly selected fuses detect an overcurrent or short circuit, they interrupt the affected conductors to help protect cables, switching equipment and connected machinery.
Its coordinated four-pole design is particularly useful in installations where the neutral conductor must be switched together with the three phases. The DIN rail format allows panel builders and maintenance engineers to install, inspect and replace fuses conveniently within industrial distribution boards and control enclosures.
| Phase | Three Phase |
|---|---|
| Manufacturer | Lovato Electric |
| Series | FB |
| Model | FB03A3N |
| Product type | Cylindrical fuse holder |
| Compatible fuse size | 22 × 58 mm |
| Pole configuration | 3P+N |
| Number of poles | 4 |
| IEC rated current | 100 A |
| UL / CSA rated current | 125 A |
| Nominal voltage | 690 V AC |
| Neutral conductor switching | Simultaneous |
| Fuse status indicator | No |
| Mounting method | DIN rail |
| Modular width | 4 modules |
| Built-in depth | Approximately 76.5 mm |
| Frontal protection rating | IP20 |
| Lockable | No |
| Weight | Approximately 720 g |
| IEC conformity | IEC/EN 60269-1 and IEC/EN 60269-2 |
| Switchgear conformity | IEC/EN 60947-1 and IEC/EN 60947-3 |
| UL conformity | UL 4248-1 |
| CSA conformity | CSA C22.2 No. 4248.1 |
| EAN | 8013975186657 |
| HS Code | 85389099 |
The FB03A3N is designed for standard 22 × 58 mm cylindrical fuse links.
The Lovato FB03A3N has a 3P+N configuration, providing positions for three phase fuses and one neutral conductor.
The fuse holder is rated at 100 A under IEC standards and up to 125 A under UL and CSA standards.
Yes. The neutral conductor is switched simultaneously with the three phase poles.
No. The Lovato FB03A3N is supplied without an optical blown-fuse status indicator.
Lovato Electric fuse holders are widely selected by panel builders, machinery manufacturers and electrical engineers for dependable circuit protection, straightforward DIN rail installation and reliable operation in industrial power systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...