Circuit Breakers
![Circuit breaker for transformer protection, Rotary actuator, 3 pole, 0.16 A, 690 V, (W x H x D) 45 x 97 x 97 mm, DIN rail, 3RV2421-0AA10](/en/images/349/G-NSA0-XX-93065P/95x95/circuit-breaker-for-transformer-protection-rotary-actuator-3-pole-0-16-a-690-v-w-x-h-x-d-45-x-97-x-97-mm-din-rail-3rv2421-0aa10.png)
![Circuit breaker for transformer protection, Rotary actuator, 3 pole, 16 A, 690 V, (W x H x D) 45 x 97 x 97 mm, DIN rail, 3RV2421-4AA10](/en/images/349/G-NSA0-XX-93065P/95x95/circuit-breaker-for-transformer-protection-rotary-actuator-3-pole-16-a-690-v-w-x-h-x-d-45-x-97-x-97-mm-din-rail-3rv2421-4aa10.png)
![Circuit breaker for transformer protection, Rotary actuator, 3 pole, 16 A, 690 V, (W x H x D) 45 x 119 x 97 mm, DIN rail, 3RV2421-4AA20](/en/images/496/G-NSA0-XX-93071P/95x95/circuit-breaker-for-transformer-protection-rotary-actuator-3-pole-16-a-690-v-w-x-h-x-d-45-x-119-x-97-mm-din-rail-3rv2421-4aa20.png)
![Circuit breaker for transformer protection, Rotary actuator, 3 pole, 20 A, 690 V, (W x H x D) 45 x 97 x 97 mm, DIN rail, 3RV2421-4BA15](/en/images/2f1/G-NSA0-XX-93068P/95x95/circuit-breaker-for-transformer-protection-rotary-actuator-3-pole-20-a-690-v-w-x-h-x-d-45-x-97-x-97-mm-din-rail-3rv2421-4ba15.png)
![Load-break switch, 6 pole, 630 A, 1250 V, (W x H x D) 440 x 235 x 110 mm, screw mounting, 3KD4660-0QE20-0](/en/images/489/G-I202-XX-28943P/95x95/load-break-switch-6-pole-630-a-1250-v-w-x-h-x-d-440-x-235-x-110-mm-screw-mounting-3kd4660-0qe20-0.png)
![Load-break switch, 3 pole, 200 A, 1000 V, (W x H x D) 198.5 x 164 x 95 mm, screw mounting/DIN rail, 3KD3634-0PE10-0](/en/images/7d9/G-I202-XX-29519P/95x95/load-break-switch-3-pole-200-a-1000-v-w-x-h-x-d-198-5-x-164-x-95-mm-screw-mounting-din-rail-3kd3634-0pe10-0.png)
![Load-break switch, 3 pole, 2000 A, 1000 V, (W x H x D) 382 x 310 x 152.5 mm, screw mounting, 3KD5630-0RE20-0](/en/images/3d5/G-I202-XX-23373P/95x95/load-break-switch-3-pole-2000-a-1000-v-w-x-h-x-d-382-x-310-x-152-5-mm-screw-mounting-3kd5630-0re20-0.png)
![Load-break switch, 6 pole, 1250 A, 1250 V, (W x H x D) 652 x 310 x 152.5 mm, screw mounting, 3KD5260-0RE20-0](/en/images/a58/G-I202-XX-28958P/95x95/load-break-switch-6-pole-1250-a-1250-v-w-x-h-x-d-652-x-310-x-152-5-mm-screw-mounting-3kd5260-0re20-0.png)
![Switch-disconnector with fuse, 3 pole, 250 A, (W x H x D) 249.5 x 207 x 188.5 mm, base mounting, 3KF3325-0LF11](/en/images/593/G-I202-XX-36516P/95x95/switch-disconnector-with-fuse-3-pole-250-a-w-x-h-x-d-249-5-x-207-x-188-5-mm-base-mounting-3kf3325-0lf11.png)
![Load-break switch, Rotary actuator, 3 pole, 1000 A, 1000 V, (W x H x D) 260 x 235 x 166.5 mm, screw mounting, 3KD5032-0QE10-0](/en/images/acb/G-I202-XX-23378P/95x95/load-break-switch-rotary-actuator-3-pole-1000-a-1000-v-w-x-h-x-d-260-x-235-x-166-5-mm-screw-mounting-3kd5032-0qe10-0.png)
![Control switch, 1 pole, 20 A, (H x D) 90 x 27 mm, 5TE8108](/en/images/e53/P-I201-XX-04515P/95x95/control-switch-1-pole-20-a-h-x-d-90-x-27-mm-5te8108.png)
![Load-break switch, 6 pole, 315 A, 1250 V, (W x H x D) 322 x 164 x 93.5 mm, screw mounting, 3KD4060-0PE20-0](/en/images/bc5/G-I202-XX-28942P/95x95/load-break-switch-6-pole-315-a-1250-v-w-x-h-x-d-322-x-164-x-93-5-mm-screw-mounting-3kd4060-0pe20-0.png)
![Switch-disconnector with fuse, 3 pole, 63 A, (W x H x D) 27 x 79 x 200 mm, 5SG7234-1](/en/images/e19/P-I201-XX-08351P/95x95/switch-disconnector-with-fuse-3-pole-63-a-w-x-h-x-d-27-x-79-x-200-mm-5sg7234-1.png)
![Load-break switch, 4 pole, 250 A, 1000 V, (W x H x D) 234 x 164 x 93.5 mm, screw mounting, 3KD3840-0PE20-0](/en/images/ecc/G-I202-XX-23367P/95x95/load-break-switch-4-pole-250-a-1000-v-w-x-h-x-d-234-x-164-x-93-5-mm-screw-mounting-3kd3840-0pe20-0.png)
![BD2C-315-EESC END FEEDER UNIT WITH DISCONNECTOR](/en/images/a29/G-NSV0-XX-01475P/95x95/bd2c-315-eesc-end-feeder-unit-with-disconnector.png)
![Switch-disconnector with fuse, 4 pole, 32 A, (W x H x D) 203.8 x 122 x 130.5 mm, DIN rail, 3KF1403-4LB11](/en/images/bef/G-I202-XX-41140P/95x95/switch-disconnector-with-fuse-4-pole-32-a-w-x-h-x-d-203-8-x-122-x-130-5-mm-din-rail-3kf1403-4lb11.png)
![Load-break switch, 4 pole, 125 A, 800 V, (W x H x D) 101.6 x 130 x 70 mm, 3VA1112-1AA46-0AA0](/en/images/e4d/G-I202-XX-24550P/95x95/load-break-switch-4-pole-125-a-800-v-w-x-h-x-d-101-6-x-130-x-70-mm-3va1112-1aa46-0aa0.png)
![Load-break switch, 3 pole, 400 A, 1000 V, (W x H x D) 190 x 164 x 130.5 mm, screw mounting, 3KD4232-0PE10-0](/en/images/fc1/G-I202-XX-23377P/95x95/load-break-switch-3-pole-400-a-1000-v-w-x-h-x-d-190-x-164-x-130-5-mm-screw-mounting-3kd4232-0pe10-0.png)
![Load-break switch, 4 pole, 630 A, 1000 V, (W x H x D) 320 x 235 x 110 mm, screw mounting, 3KD4640-0QE20-0](/en/images/edf/G-I202-XX-23387P/95x95/load-break-switch-4-pole-630-a-1000-v-w-x-h-x-d-320-x-235-x-110-mm-screw-mounting-3kd4640-0qe20-0.png)
![Switch-disconnector with fuse, 1 pole, 63 A, (W x H x D) 27 x 70 x 90 mm, 5SG7113](/en/images/ac9/P-I201-XX-04778P/95x95/switch-disconnector-with-fuse-1-pole-63-a-w-x-h-x-d-27-x-70-x-90-mm-5sg7113.png)
Safety guaranteed: Functions and advantages of switch-disconnectors
Circuit breakers are used to protect electrical circuits by automatically switching off in the event of an overload or short circuit. They can be switched back on, eliminating the need for one-way fuses. Switch-disconnectors, on the other hand, specialize in safely isolating electrical circuits from the power supply.
Unlike circuit breakers, switch-disconnectors do not perform a protective function, but merely ensure safe isolation as well as prevention of accidental switch-on. Both electromechanical components are indispensable in electrical installations and in the energy sector, with circuit-breakers primarily ensuring the protection of installations, while switch-disconnectors are used for maintenance and repairs.