Description
Used product. The Schaffner FN258P-180-40 is a 3-phase Schaffner FN258 series EMC/RFI mains filter, designed to suppress conducted electromagnetic interference in high-power industrial applications. The photographed unit clearly shows 3×480/275 V AC, 50–60 Hz, 180 A @ 50 °C, and climate class 25/100/21. The model is a two-stage version, with a three-phase Delta configuration, chassis mounting, and a high-current terminal block. It is particularly intended for inverters and Power Drive Systems.
⚙️ Technical Specifications
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Brand: Schaffner
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Model: FN258P-180-40
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Manufacturer code: 800969
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Type: 3-phase EMC/RFI filter
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Configuration: Three Phase / Delta
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Filter stages: 2
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Rated current: 180 A @ 50 °C
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Voltage: 3×480/275 V AC
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Frequency: 50–60 Hz
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Phase-to-phase voltage: 480 V AC
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Phase-to-earth voltage: 275 V AC
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Operating range: DC–60 Hz
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Leakage current: approx. 3.5 mA
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Power loss: approx. 73 W
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Operating temperature: −25…+100 °C
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Dimensions: approx. 110 × 240 × 438 mm
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Mounting: chassis
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Connection: terminal block
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Approvals: CSA, ENEC, UR
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Declared applications: Inverters / Power Drive Systems
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Indicative operating life: approx. 220,000 h
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Country indicated on nameplate: Made in Hungary
⚡ Function in the Electrical System
The FN258P-180-40 is installed on the three-phase line to attenuate conducted EMI/RFI interference generated by electronic power equipment and prevent its propagation toward the mains. The two-stage structure provides effective filtering across a wide range of interference and makes the component particularly suitable for inverters, converters, and industrial drives.
🏭 Construction & Installation
The filter features a robust metal enclosure with a compact chassis-mounting design and three input/output poles. The photographed section identifies the LINE L1, L2, and L3 terminals. The component indicates a recommended tightening torque of 15–20 Nm for the main connections. The wiring must be sized for the rated current of 180 A and must comply with the three-phase configuration specified by the manufacturer.
🌐 Applications
Suitable for industrial and photovoltaic inverters, power converters, motor drives, Power Drive Systems, large three-phase power supplies, industrial equipment, and power electronics systems. The FN258P model is specifically classified for Inverters / Power Drive Systems applications.
🛡️ Safety & Product Condition
The filter is used, with normal signs of use, scratches, and superficial abrasions on the metal enclosure, visible in the photographs. No significant structural deformation is evident. Operation is not declared as tested. Before installation, verify insulation, continuity of the protective circuit, terminal integrity, and correct LINE/LOAD connection. The component is intended for high-current three-phase circuits and must be installed exclusively by qualified personnel.
📦 Package Contents
1 × Schaffner FN258P-180-40, 180 A three-phase EMC/RFI filter, complete with the enclosure and terminal blocks present.
🚀 Final Description
The Schaffner FN258P-180-40 is a high-power industrial EMC filter with a 180 A rating, 480 V AC three-phase voltage, Delta configuration, and two-stage filtering. Its dimensions of approx. 110 × 240 × 438 mm, robust metal construction, and high-current terminal block make it particularly suitable as an original replacement for inverters, drives, and industrial power systems. The model is obsolete/discontinued, but it remains available through distributors and the professional replacement-parts market.
