FDS30J3 Marathon Special Products Fused Disconnect Switch, 3-pole 30 A 600 V AC, Class J
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The Marathon Special Products FDS30J3 is a 3-pole fused disconnect switch for Class J fuses, rated 30 A at 600 V AC, with a 200 kA short circuit rating. The fuse carrier pulls out, so the fuse chamber is isolated while you change fuses or work downstream. Applied Control is the Marathon Special Products manufacturers' representative. Send the catalog number and quantity, and we send back a quote.
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FDS30J3 specifications
| Catalog number | FDS30J3 |
| Manufacturer | Marathon Special Products (Regal Rexnord) |
| Series | FDS fused disconnect switch |
| Poles | 3 |
| Ampere rating | 30 A |
| Voltage rating | 600 V AC |
| Fuse class | Class J |
| Short circuit rating | 200 kA |
| Wire type | 75°C copper wire or higher (CU75) |
| Fuse carrier | Extractable. The switch will not operate without the carrier in place |
| Lockout | Accepts common lockout devices |
| Touch protection | IP20 (IEC 60529) |
| Listing | UL 98 Listed, cULus, CSA C22.2 No. 4 |
| Typical uses | Industrial controls, transformer protection, UL 67 panelboards |
| Hot handle | FDS-HH-KIT standalone hot handle kit (for switches built after 25 Sep 2026; confirm with us) |
Specifications from the Marathon Special Products fused disconnect switch catalog page (marathonsp.com). Confirm against the current datasheet before installation.
Picking an FDS switch
Start with the fuse class. Class CC fits the 30 A switches. Class J comes in 30 A and 60 A. Then pick the pole count. 1-pole switches carry 347 V AC or 125 V DC. 2 and 3-pole switches carry 600 V AC. Send the load amps and voltage and we will match the switch and the fuse.
See the MSP Class J fused disconnect page, the Marathon collection or the cross reference hub for Bussmann to Marathon fuse crosses.