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| 13 www.littelfuse.com power distribution protection 12 www.littelfuse.com power distribution protection telecom disconnect switch ltfd 1200 series ?900 to 1200 amp ordering information catalog number ltfd 1200-01 specifications voltage rating: 60 vdc ampere range: 900 to 1200 amperes approvals: ul recognized (file no. e122674) dimensions 6.750" 5.750" 0.50" 3.0" 4.0" 0.50" 2.750" 4.00" 2.625" 5.250" 1.313" alarm ta b 0.266" dia. hole with 0.50" x 0.156" deep core (4 places ) alarm fuse clear cover for customer label 1.125-12 7.625" 3.625" littelfuse s new 1200 ampere ltfd 1200-01 fuseholders are designed for high power applications where space and costs are major concerns. this com- pact fuseholder is designed specifically for 900 to 1200a applications and can replace two conventional 600a holders. an optional integrated alarm fuse circuit provides visual and remote notification of a blown fuse. the innovative pull-out design provides a positive connection and eliminates the need for tools to replace blown fuses. features compact vented for cool running operation quick fuse replacement optional integrated alarm signaling circuit recommended fuses littelfuse l17t series fuses littelfuse 481 series alarm fuses telecommunications power fuse tln series specifications voltage rating: 170 vdc interrupting rating: 100,000 amperes ampere range: 1 to 600 amperes approvals: ul recognized the tln series fuses are specifically designed for the protection of telecommunications dc power distribution circuits. features 170 vdc fast-acting and current limiting 1 to 600 amperes dimensions ampere dimensions in inches (mm) rating a b c d e f g h j k figure 1 1 ?30 2 1/2 1/2 9/16 5/64 5/32 3/8 (50.8) (12.7) (12.7) (14.3) (2.0) (4.0) (9.5) 35 ?60 3 3/4 5/8 13/16 3/32 3/16 5/8 (76.2) (19.1) (15.9) (20.6) (2.4) (4.8) (15.9) figure 2 70 ?100 5-7/8 1 1-1/16 1-1/16 1/8 3/4 1-1/4 1/4 9/32 1/2 (149.2) (25.4) (27.0) (27.0) (3.2) (19.1) (31.6) (6.4) (7.1) (12.7) 110 ?200 7-1/8 1-1/2 1-15/32 1-19/32 3/16 1-1/8 1-27/32 7/16 9/32 11/16 (181.0) (38.1) (37.3) (40.5) (4.8) (28.6) (46.8) (11.1) (7.1) (17.5) 225 ?400 8-5/8 2 1-15/16 2-3/32 1/4 1-5/8 2-11/32 5/8 13/32 15/16 (219.1) (50.8) (49.2) (53.2) (6.4) (41.3) (59.5) (15.9) (10.3) (23.8) 450 ?600 10-3/8 2-1/2 2-3/8 2-19/32 1/4 2 2-27/32 3/4 17/32 1-1/8 (263.5) (63.5) (60.3) (65.9) (6.4) (50.8) (72.2) (19.1) (13.5) (28.6) a f e c d g b a j k h b c f d fig. 1 fig. 2 e dimensions ordering information catalog catalog catalog catalog number amperage number amperage number amperage number amperage tln 1 1 tln 30 30 tln 90 90 tln 250 250 tln 3 3 tln 35 35 tln 100 100 tln 300 300 tln 5 5 tln 40 40 tln 110 110 tln 350 350 tln 6 6 tln 45 45 tln 125 125 tln 400 400 tln 10 10 tln 50 50 tln 150 150 tln 450 450 tln 15 15 tln 60 60 tln 175 175 tln 500 500 tln 20 20 tln 70 70 tln 200 200 tln 600 600 tln 25 25 tln 80 80 tln 225 225 replaces competitor s tpn and tgn series
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