General
Colour control element	Black
Colour housing	Grey
Degree of protection (IP), front side	IP20
Depth	64
Device construction	Built-in device fixed built-in technique
Height	69
Number of auxiliary contacts as change-over contact	0
Number of auxiliary contacts as normally closed contact	0
Number of auxiliary contacts as normally open contact	0
Number of poles	2
Number of switches	1
Rated current	32
Rated voltage at DC	1000
Type of control element	Door coupling rotary drive
Type of electrical connection of main circuit	Screw connection
Width	52.5
Floor mounting
Interlockable
Suitable for distribution board installation
Suitable for front mounting 4-hole
Suitable for front mounting centre
Suitable for intermediate mounting
Version as emergency stop installation
Version as main switch
Version as maintenance-/service switch
Version as reversing switch
Version as safety switch
Voltage release optional

ABB OTDC25FT2 is a manually operated DC switch disconnector for industrial applications, designed for use in DC networks with voltages up to 1000 V DC and a rated current of 32 A. The device is designed as a built-in component for fixed installation technology and serves for the safe disconnection of electrical loads in DC circuits. It features a protection rating IP20 on the front, providing protection against contact with fingers and against solid foreign objects up to 12.5 mm in diameter. The housing colour is grey, the operating element is black and designed as a door coupling rotary drive, making the switch suitable for mounting on doors or fronts. Dimensions are 52.5 mm (width), 69 mm (height), and 64 mm (depth), with mounting options including front mounting 4-hole and distribution board installation. The switch is not intended for floor mounting or intermediate mounting.

Applications
OTDC25FT2 is designed for use in industrial DC installations, particularly in environments with high ambient temperatures. It is suitable for applications requiring safe and reliable disconnection of power supply, such as in automation technology, drive systems, or energy technology. The OTDC series offers a cost-effective solution with high operational reliability, designed for current ratings from 16 A to 32 A. The reduction of power loss by 50 % compared to previous models improves efficiency and reduces thermal load during operation.

Functions and Equipment in Detail
The switch has two poles (pole count: 2) and is designed as a maintenance/repair switch, making it suitable for use during maintenance work or repairs. It is not designed as a main switch, emergency stop device, safety switch, or reversing switch. The main circuit connection is via screw connection. No auxiliary contacts (openers, closers, changeover contacts) are integrated. Operation is via a door coupling rotary drive, ensuring secure and mechanically stable operation. The switches are intended for mounting in distribution boards and on fronts with 4-hole mounting.

Technology Explained Simply
The rated voltage of 1000 V DC and the rated current of 32 A define the maximum operating parameters at which the switch functions safely and reliably. The protection rating IP20 protects against direct contact with moving parts and against entry of solid foreign objects with a diameter greater than 12.5 mm, which is sufficient for use in enclosed enclosures or controlled environments. The design as a built-in component for fixed installation technology means the switch is installed in a distribution board or control panel and is not intended for use as a freestanding device. The use of a door coupling rotary drive enables a mechanical connection to the door, allowing the switch to be operated via the door, which is useful during maintenance work.

Compatibility and Accessories
ABB offers an extensive accessory range for OTDC25FT2, enabling adaptation to specific requirements. This includes various handles such as OHBS1PH, OHYS3AH1, OHBS2AJ1, or OHBS2RJ, available in different sizes, colours, and protection ratings (e.g. IP54, IP65). Extension shafts such as OXS6X57 (length 57 mm, shaft Ø 6 mm) or OXS6X455 (length 455 mm, shaft Ø 6 mm) can be used to enable operation over longer distances. Additional options include knob handles such as OHRS3 or selector handles such as OHBS3AH1, which can be selected according to application. The accessories are specifically developed for the OTDC series and ensure safe and compatible installation.

Mounting and Installation
The switch is designed for mounting in distribution boards and on fronts with 4-hole mounting. Installation is via screw connection in the main circuit. The mounting dimensions (52.5 mm width, 69 mm height, 64 mm depth) are suitable for standard distribution board constructions. Door mounting via the door coupling rotary drive requires a corresponding hole in the door or front panel.

Operational Advantages
OTDC25FT2 is characterised by high reliability and reduced power loss, which lowers operating temperature and increases service life. IEC certification ensures compliance with international safety and quality standards. The flexibility provided by various mounting options and the extensive accessory range enables adaptation to different requirements. The design as a maintenance/repair switch supports safe working procedures during maintenance. The switches are designed for use in environments with high temperatures, making them suitable for demanding industrial applications.