Load Break Switches
A load break switch (load break disconnector) is a switching device that can open and close a circuit under load current and isolates the line from the supply in the open position. It is used as the main switch at the panel input, as a maintenance disconnector at the machine and as a DC-side disconnector in photovoltaic systems, to leave the circuit without power before work. Among ABB, Schneider Electric and Siemens products there are AC load break switches, fused load break switches, solar DC disconnectors and emergency-stop type models, as well as accessories such as handles, shafts and terminal covers; Tibcon and Sigma horizontal type models are listed in a separate subcategory. Choose the load break switch according to its rated current, number of poles, AC or DC use, the IEC 60947-3 utilization category corresponding to the type of load (for example AC-21 for resistive loads, AC-23 for motor loads) and, for fused types, the fuse size. Product names state currents such as 12 A, 25 A, 125 A, 175 A and 315 A. A load break switch is not a protective device on its own: unfused types do not interrupt short-circuit current; that task belongs to the upstream fuse or circuit breaker.
Products
- Siemens 3NJ4143-3DF01 Fuse Switch Disconnector 630 A — Siemens · SKU: 3NJ4143-3DF01 · TRY 40,379.00 · Made to order
- Siemens 3NJ4123-3BF01 Switch Disconnector 250 A — Siemens · SKU: 3NJ4123-3BF01 · TRY 34,240.00 · Made to order
- Siemens 3KD9305-0 Switchable Pole 4, with flat terminal, 3KD Size 3 — Siemens · SKU: 3KD9305-0 · TRY 10,424.00 · Made to order
- Siemens 3KD9206-0 Neutral Conductor Terminal Block, Removable Jumper, 3KD Size 2 — Siemens · SKU: 3KD9206-0 · TRY 2,858.00 · Made to order
- Siemens 3NJ4121-3BF01 Switch Disconnector 250 A — Siemens · SKU: 3NJ4121-3BF01 · TRY 34,240.00 · Made to order
- Siemens 3KD9103-5 Auxiliary Switch Module, 3KD Size 1/2 — Siemens · SKU: 3KD9103-5 · TRY 1,601.00 · Made to order
- Siemens 3NJ4123-3DF01 Fuse Switch Disconnector 250 A — Siemens · SKU: 3NJ4123-3DF01 · TRY 34,731.00 · Made to order
- Siemens 3NJ4131-3BF01 Switch Disconnector 400 A — Siemens · SKU: 3NJ4131-3BF01 · TRY 35,304.00 · Made to order
- Siemens 3KD9306-0 Neutral Conductor Terminal Block, Removable Jumper, 3KD Size 3 — Siemens · SKU: 3KD9306-0 · TRY 6,975.00 · Made to order
- Siemens 3KD9405-0 Switchable Pole 4, with flat terminal, 3KD Size 4 — Siemens · SKU: 3KD9405-0 · TRY 24,858.00 · Made to order
- Siemens 3KD9505-0 Switchable Pole 4, with flat terminal, 3KD Size 5 — Siemens · SKU: 3KD9505-0 · TRY 75,059.00 · Made to order
- Siemens 3KD9205-0 Switchable Pole 4, with flat terminal, 3KD Size 2 — Siemens · SKU: 3KD9205-0 · TRY 4,258.00 · Made to order
- Siemens 3KD9506-0 Neutral Conductor Terminal Block, Removable Jumper, 3KD Size 5 — Siemens · SKU: 3KD9506-0 · TRY 50,121.00 · Made to order
- Siemens 3NJ5930-3BB Switch Disconnector Mounting Adapter for Busbar Systems — Siemens · SKU: 3NJ5930-3BB · TRY 6,452.00 · Made to order
- Siemens 3KD9406-0 Neutral Conductor Terminal Block, Removable Jumper, 3KD Size 4 — Siemens · SKU: 3KD9406-0 · TRY 16,595.00 · Made to order
- Schneider Electric 28902 ComPacT, INS63 — Schneider Electric · SKU: 28902 · TRY 5,354.25 · Made to order
- Schneider Electric 31114 ComPacT, INS630 — Schneider Electric · SKU: 31114 · TRY 33,637.82 · Made to order
- Schneider Electric 28910 ComPacT, INS125 — Schneider Electric · SKU: 28910 · TRY 8,395.56 · Made to order
- Schneider Electric 28912 ComPacT, INS160 — Schneider Electric · SKU: 28912 · TRY 9,507.55 · In stock
- Schneider Electric 28900 ComPacT, INS40 — Schneider Electric · SKU: 28900 · TRY 5,226.37 · Made to order
- Schneider Electric 31110 ComPacT, INS400 — Schneider Electric · SKU: 31110 · TRY 29,745.84 · In stock
- Schneider Electric 28904 ComPacT, INS80 — Schneider Electric · SKU: 28904 · TRY 6,216.05 · Made to order
- Schneider Electric LV480805 ISFT250 Fused Switch Hook-Type 60 mm M10 With Terminal — Schneider Electric · SKU: LV480805 · TRY 29,134.24 · Made to order
- Siemens 8UD1151-3AF25 Door-Locking Rotary Control Mechanism, Emergency Stop, 3KD Size 4 — Siemens · SKU: 8UD1151-3AF25 · TRY 15,893.00 · Made to order
- Schneider Electric VBF0 TeSys VARIO Load Break Switch 25A — Schneider Electric · SKU: VBF0 · TRY 2,413.03 · Made to order
How to choose Load Break Switches
A load break switch (load break disconnector) is a switching device that can open and close a circuit under load current and isolates the line from the supply in the open position. It is used as the main switch at the panel input, as a maintenance disconnector at the machine and as a DC-side disconnector in photovoltaic systems, to leave the circuit without power before work.
- Separate overcurrent/leakage protection, motor starting and local isolation requirements.
- Select rated current, pole count and breaking capacity (kA) from the installation calculation.
- Match coil voltage, auxiliary contacts and tripping curve to the control circuit and load type.
Frequently asked questions
What is Load Break Switches and where is it used?
A load break switch (load break disconnector) is a switching device that can open and close a circuit under load current and isolates the line from the supply in the open position. It is used as the main switch at the panel input, as a maintenance disconnector at the machine and as a DC-side disconnector in photovoltaic systems, to leave the circuit without power before work.
What should I compare when choosing Load Break Switches?
Choose the load break switch according to its rated current, number of poles, AC or DC use, the IEC 60947-3 utilization category corresponding to the type of load (for example AC-21 for resistive loads, AC-23 for motor loads) and, for fused types, the fuse size.
Which product groups are available under Load Break Switches?
The current subcategories include Horizontal Type Load Break Switches, Vertical Type Load Break Switches. Open a subcategory to compare its products and technical details.
Load Break Switches Selection Guide: Technical Criteria and Engineering Practice