1343553 Marathon Special Products Open Power Distribution Block, 3-pole 335 A 600 V, 400 kcmil to #6 AWG line, 6 taps
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The Marathon Special Products 1343553 is a 3-pole open style power distribution block rated 335 A at 600 V. Each pole takes one 400 kcmil to #6 AWG line conductor and splits to 6 load openings (#2 to #14 AWG copper). UL Listed with UL 508A feeder circuit spacing. Aluminum connectors. 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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1343553 specifications
| Catalog number | 1343553 |
| Manufacturer | Marathon Special Products (Regal Rexnord) |
| Series | 134 series open style power block |
| Style | Open, distribution block |
| Poles | 3 |
| Ampere rating | 335 A |
| Voltage rating | 600 V |
| Connector material | Aluminum, tin plated |
| Line side, copper wire | 400 kcmil to #6 AWG, 1 opening per pole |
| Line side, aluminum wire | 400 kcmil to #6 AWG |
| Load side, copper wire | #2 to #14 AWG, 6 openings per pole |
| Load side, aluminum wire | #2 to #14 AWG |
| Insulator | Black thermoplastic, rated to 125°C, UL 94 V-0 |
| Mounting | Panel mount |
| Feeder circuit spacing per UL 508A | Yes (UL Listed power distribution block, UL 1953) |
| Cover part number | CH1343 |
| Dimensions (L x W x D) | 5.64" x 5" x 3.92" |
| Weight | 2.73 lbs |
| Agency approvals | UL Listed, CSA Certified |
| Country of origin | USA |
Specifications from the Marathon Special Products power block selector, open splicer and distribution page, and 2026 catalog (marathonsp.com). Ratings depend on wire size and type. Confirm against the current datasheet before installation.
Reading the catalog number
Marathon open blocks use one number per family with the pole count in the fourth digit. 1341582 is 1-pole, 1342582 is 2-pole, 1343582 is 3-pole. The last three digits set the connector layout. In the 134 series, 582 and 360 are splicers (one in, one out). 305 is a splicer with two openings in and out. 554, 553, 555, 585 and 595 are distribution blocks with 2, 6, 6, 8 and 12 load openings.
Pick the block by the feeder amps, then the line conductor, then the number of taps per pole. Every 134 block is UL Listed, so it works on a UL 508A feeder circuit. Send the drawing or the wire list and we check it with you.
See the Marathon collection, the 200 A 1343572 splicer and 1343570 distribution block, the enclosed EPB power blocks, or the cross reference hub.