Battery disconnect with removable key – what it is and why choose it
The Osculati battery disconnect with removable key is a heavy‑duty manual switch designed to isolate a DC battery bank quickly and safely. With a continuous rating of up to 300 A at 50 V DC and a removable actuator, it allows you to cut power for maintenance, storage or emergency situations while physically preventing unauthorised reconnection.
Main features
- High current capacity: continuous rating of 300 A at up to 50 V DC, suitable for demanding battery systems.
- Robust overload capability: intermittent rating of 500 A and cranking rating of 1000 A for 30 seconds.
- Three switch positions: ON / OFF / OUT switch function, allowing normal operation, isolation and actuator removal.
- Removable key/actuator: the actuator can be taken out in the OUT position to help prevent accidental or unauthorised operation.
- High electrical reliability: low contact resistance (≤ 50 mΩ) and insulation resistance of at least 100 MΩ at 1000 V DC.
- Dielectric strength: tested at 2000 V DC and 1000 V AC for 1 minute.
- Wide operating temperature: from −20 °C to +80 °C for reliable switching in demanding environments.
- Ingress protection: IPX8 protection on the operating surface (tested at 1.8 m depth for 30 minutes).
- Durable housing: engineered plastics and corrosion‑resistant metal parts for long life.
- Clear position indication: ON and OFF marking and colour layout on the front for quick visual confirmation of the switch status.
Technical specifications
- Product type: battery disconnect switch with removable key
- Brand: Osculati
- Continuous rating: 300 A, 50 V DC max.
- Intermittent rating: 500 A
- Cranking rating: 1000 A for 30 s
- Contact resistance: ≤ 50 mΩ
- Insulation resistance: ≥ 100 MΩ at 1000 V DC
- Dielectric strength: 2000 V DC for 1 minute; 1000 V AC for 1 minute
- Operating temperature range: −20 °C to +80 °C
- Switch function: ON / OFF / OUT
- Actuation torque: 9 ± 3 kgf·cm
- Ingress protection (operating surface): IPX8 (1.8 m for 30 minutes)
- Actuator material: PC/ABS
- Housing and cover material: PBT (UL 94 V‑0 flammability class)
- Contact and screw material: copper alloy
- Nut material: nickel‑plated brass
- Washer material: SUS316 stainless steel
Applications and use cases
- Battery isolation for vehicles: ideal as a master disconnect switch for cars, 4x4s, vans or service vehicles to prevent battery drain during storage and to add an extra level of security.
- Marine and boating installations: suitable for isolating 12 V or 24 V DC battery banks in boats and yachts, where high current capability and corrosion‑resistant materials are essential.
- Off‑grid and backup systems: can be used to disconnect batteries in solar, inverter or UPS installations for safe maintenance.
- Industrial equipment: useful in DC power systems, forklifts or machinery where a clear and reliable battery cut‑off is required.
- Emergency power cut‑off: provides a clearly visible and quickly accessible way to disconnect power in case of faults or short circuits.
FAQ
What is the continuous current rating of this battery disconnect switch?
The switch is rated for 300 A continuous at up to 50 V DC, making it suitable for high‑demand battery systems.
What is the purpose of the OUT position?
The OUT position is designed to allow the actuator to be taken out of the switch, providing an additional level of isolation and helping to prevent accidental or unauthorised operation.
Is the key or actuator removable?
Yes. This model is designed with a removable key/actuator, so you can physically remove it when the switch is placed in the appropriate position.
Can it handle engine cranking currents?
Yes. It has a cranking rating of 1000 A for 30 seconds, suitable for handling typical engine start surges within its specified limits.
What level of water protection does it offer?
The operating surface is rated IPX8 and has been tested at a depth of 1.8 m for 30 minutes, providing a high degree of protection against water ingress.
What materials are used in the construction?
The actuator is made from PC/ABS, the housing and cover from PBT with UL 94 V‑0 flame rating, the contacts and screws from copper alloy, the nut from nickel‑plated brass and the washer from SUS316 stainless steel.
In what temperature range can this switch be used?
The operating temperature range is from −20 °C to +80 °C, allowing use in both cold and hot environments within these limits.
Does it provide clear indication of the switch status?
Yes. The front face includes ON and OFF markings and a specific colour layout to allow quick visual confirmation of whether the circuit is energised or isolated.
*Content generated by AI
