Why Choose the ABB OTP45B3U 45A 3-Pole IP65 Enclosed Switch Disconnector?
The ABB OTP45B3U (ABB product ID 1SCA022629R2120) is a robust 45 A, 3-pole enclosed switch disconnector designed for reliable manual switching and electrical isolation of industrial machinery, motors and low-voltage distribution circuits. Part of the ABB OTP plastic enclosed switch-disconnector range, it combines a durable grey plastic enclosure, black rotary selector handle and IP65 ingress protection in a compact, ready-to-install assembly.
This particular OTP45B3U variant is supplied without preformed cable knockouts, providing flexibility for installers to prepare cable entry positions according to the requirements of the installation. The enclosure is designed for applications where cable routing, gland selection and environmental sealing need to be tailored to the electrical equipment and mounting location.
With a 45 A AC-23A operational current rating at 400 V AC, a 63 A AC-22A rating and a 22 kW AC-23A operational power rating at 400 V AC, the ABB OTP45B3U is suitable for compatible industrial motor and load-switching applications. Its 200 × 145 × 90 mm enclosure, integrated operating handle and neutral and protective earth terminals make it a practical solution for machinery manufacturers, electrical contractors and industrial maintenance engineers.
Key Advantages
- 45 A three-pole enclosed switch disconnector for industrial machinery and electrical distribution.
- IP65 protection against dust ingress and water jets when correctly installed.
- Plastic enclosure without preformed cable knockouts allows flexible cable entry positioning.
- 63 A AC-22A switching capability for compatible mixed resistive and inductive loads.
- 45 A AC-23A switching capability for suitable motor and highly inductive loads.
- 22 kW AC-23A operational power rating at 400 V AC.
- Black rotary selector handle provides straightforward ON/OFF control.
- Padlockable operating arrangement supports controlled isolation procedures.
- Interlocked enclosure cover helps restrict access to internal components while the switch is ON.
- Integrated neutral and protective earth terminals simplify electrical installation.
- Compact 200 × 145 × 90 mm construction for convenient mounting near machinery.
- Compatible with optional auxiliary contacts for switch-position signalling.
Key Features
- ABB OTP45 plastic enclosed switch-disconnector series.
- OTP45B3U version without preformed cable knockouts.
- Three-pole switching configuration.
- 45 A AC-23A operational current at 400 V AC.
- 63 A AC-22A operational current at 400 V AC.
- 22 kW AC-23A operational power at 400 V AC.
- IP65-rated plastic enclosure.
- Grey housing with black selector handle.
- I-O / ON-OFF switching positions.
- Interlocked cover with defeatable interlock.
- Padlockable handle for securing the switch in the OFF position.
- Blank cable entry arrangement for installation-specific cable routing.
- Neutral and protective earth terminals included.
- Screw-clamp main circuit terminals.
- Auxiliary contacts available separately.
- Maximum auxiliary contact configuration of 2 NO + 2 NC.
- Suitable for use as a local machine isolator or main switch in appropriately designed circuits.
- Designed for industrial electrical switching and isolation applications.
Technical Specifications
- Manufacturer: ABB
- Series: OTP Enclosed Switch Disconnectors
- Model: OTP45B3U
- ABB order code: OTP45B3U
- ABB product ID: 1SCA022629R2120
- Product group: 311004 – Plastic Enclosed Switches (OTP)
- Product type: Enclosed switch disconnector
- Number of poles: 3
- Operating positions: I-O / ON-OFF
- Operating mechanism: Manual rotary selector
- Handle colour: Black
- Enclosure material: Plastic
- Enclosure colour: Grey
- Ingress protection: IP65
- Rated operational current AC-23A at 400 V AC: 45 A
- Rated operational current AC-22A at 400 V AC: 63 A
- Rated continuous current: 63 A
- Rated operational power AC-23A at 400 V AC: 22 kW
- Maximum rated operational voltage: 750 V AC
- Rated short-time withstand current: 1 kA
- Switching principle: Mechanical load-break switching and isolation
- Cable entry configuration: Blank enclosure, without preformed knockouts
- Cable entry preparation: Installer-prepared to suit the installation
- Main terminal type: Screw clamp
- Neutral terminal: Included
- Protective earth terminals: Included
- Cover arrangement: Interlocked, with defeatable interlock
- Padlocking facility: Yes
- Auxiliary contacts fitted: None
- Maximum compatible auxiliary contacts: 2 NO + 2 NC
- Enclosure height: 200 mm
- Enclosure width: 145 mm
- Enclosure depth: 90 mm
- Approximate net weight: 0.9 kg
- Mounting type: Surface mounting
- Country of origin: Finland
- Applicable product standards: IEC 60947-1 and IEC 60947-3
Reliable Industrial Isolation with Flexible Cable Entry Installation
The ABB OTP45B3U provides a practical means of disconnecting three-phase electrical equipment from its power supply. When the black rotary selector is moved to the OFF position, the three mechanically linked main contacts open, allowing the connected equipment to be isolated in accordance with the installation's electrical safety procedures.
The switch is suitable for compatible motor and machinery applications requiring a local disconnecting point. Its AC-23A utilisation category covers switching duties involving motor loads and other highly inductive circuits within the specified ratings. The 45 A AC-23A rating should be distinguished from the 63 A AC-22A and continuous-current ratings, as each relates to different operating conditions.
A key advantage of the OTP45B3U is its enclosure without preformed cable knockouts. This enables installers to determine cable entry locations according to the equipment layout, cable route and gland arrangement. Suitable openings and sealing accessories must be selected and installed correctly to maintain the enclosure's IP65 protection.
The enclosure includes a black selector handle, cover interlocking arrangement and neutral and protective earth terminals. These features support convenient installation, operation and maintenance. Optional auxiliary contacts can be incorporated where switch-position indication or control-system feedback is required.
As a switch disconnector, the OTP45B3U provides switching and isolation functions rather than automatic fault protection. It must therefore be used with appropriately rated overload and short-circuit protective devices where required by the electrical installation.
Typical Applications
- Industrial motor isolation and local disconnecting points.
- Three-phase machinery and production equipment.
- Conveyor systems and material handling machinery.
- Industrial pumps and pumping stations.
- Ventilation fans and HVAC equipment.
- Compressors and auxiliary plant systems.
- Packaging and processing machinery.
- Manufacturing and assembly lines.
- Commercial and industrial electrical installations.
- Machine-mounted electrical isolators.
- Installations requiring customised cable entry positions.
- OEM machinery and electrical panel manufacturing.
