Why Choose the ABB OTP63B4M 18.5kW 4-Pole IP65 Enclosed Switch Disconnector?
The ABB OTP63B4M (manufacturer product code 1SCA022401R4910) is a robust four-pole plastic enclosed switch disconnector designed for reliable manual switching and electrical isolation in industrial and commercial low-voltage installations. Part of the established ABB OTP enclosed switch range, it combines a durable protective enclosure, a black operating handle and a four-pole switching mechanism to provide a practical local isolation solution for machinery, electrical equipment and power distribution systems.
Specified as an 18.5 kW enclosed switch, the OTP63B4M has an AC-23A motor switching rating of 18.5 kW at 690 V AC. At 380–415 V AC, ABB specifies a higher AC-23A motor switching rating of 37 kW. Its operational current ratings include 75 A under AC-23A conditions at 380–415 V AC and 80 A under AC-22A conditions. These application-specific ratings make it suitable for a range of industrial loads when selected according to the relevant voltage, utilisation category and installation requirements.
The OTP63B4M is housed in a glass-fibre-reinforced polycarbonate enclosure with IP65 ingress protection and IK08 impact resistance. It features a black selector handle, padlockable OFF position, interlocked enclosure cover and metric threaded cable entries. With a compact enclosure measuring 200 × 145 × 90 mm, the switch is suitable for mounting close to machinery and other equipment requiring a clearly accessible means of electrical isolation.
Key Advantages
- Four-pole switching configuration enables simultaneous isolation of four electrical conductors.
- 18.5 kW AC-23A motor switching rating at 690 V AC for appropriately rated industrial applications.
- 37 kW AC-23A motor switching rating at 380–415 V AC.
- 75 A AC-23A operational current rating at 380–415 V AC.
- 80 A AC-22A operational current rating for mixed resistive and inductive loads.
- IP65 enclosure protection against dust ingress and water jets.
- IK08 impact resistance supports use in demanding industrial environments.
- Black selector operating handle provides clear ON/OFF control.
- Padlockable OFF position supports controlled maintenance isolation procedures.
- Interlocked enclosure cover helps restrict access while the switch is in the ON position.
- UV-protected polycarbonate enclosure supports indoor and suitably assessed outdoor installations.
- Metric threaded cable entries provide convenient cable-routing options.
- Fixed neutral and protective earth terminals support associated conductor connections.
- Compatible with selected ABB auxiliary contact accessories for switching indication and monitoring.
Key Features
- Manufacturer: ABB.
- Product series: OTP Plastic Enclosed Switches.
- Model: OTP63B4M.
- ABB manufacturer product code: 1SCA022401R4910.
- Product type: Enclosed switch disconnector.
- Number of switched poles: 4.
- Conventional enclosed thermal current: 80 A.
- AC-23A operational current at 380–415 V AC: 75 A.
- AC-23A motor power at 690 V AC: 18.5 kW.
- AC-23A motor power at 380–415 V AC: 37 kW.
- Rated insulation voltage: 750 V.
- Enclosure protection: IP65.
- Enclosure impact resistance: IK08.
- Enclosure construction: Glass-fibre-reinforced polycarbonate.
- Handle colour: Black.
- Handle type: Rotary selector handle.
- Handle locking: Padlockable in the OFF position.
- Cover interlocking: Included, with an authorised override facility.
- Cable-entry arrangement: 2 × M32 + M16 at the top and bottom.
- Main circuit terminals: Screw clamp.
- Conductor connection capacity: 1.5–35 mm².
- Neutral and protective earth terminals: Included.
- Auxiliary contacts fitted: None.
- Maximum auxiliary contact configuration: 2 NO + 2 NC.
Technical Specifications
- Manufacturer: ABB
- Product series: OTP
- Model: OTP63B4M
- Manufacturer product code: 1SCA022401R4910
- ABB product group: 311004 – Plastic Enclosed Switches (OTP)
- Product description: 18.5 kW, 4-pole, IP65 plastic enclosed switch disconnector
- Product category: Enclosed switch disconnectors
- Number of poles: 4
- Conventional enclosed thermal current (Ithe): 80 A
- Rated operational current (AC-21A, 380–415 V): 80 A
- Rated operational current (AC-21A, 500 V): 80 A
- Rated operational current (AC-21A, 690 V): 80 A
- Rated operational current (AC-22A, 380–415 V): 80 A
- Rated operational current (AC-22A, 690 V): 80 A
- Rated operational current (AC-23A, 380–415 V): 75 A
- Rated operational current (AC-23A, 500 V): 58 A
- Rated operational current (AC-23A, 690 V): 20 A
- Rated operational motor power (AC-23A, 380–415 V): 37 kW
- Rated operational motor power (AC-23A, 500 V): 37 kW
- Rated operational motor power (AC-23A, 690 V): 18.5 kW
- Rated insulation voltage (Ui): 750 V
- Rated impulse withstand voltage (Uimp): 1.5 kV
- Rated short-time withstand current (Icw, 1 s): 1.5 kA
- Rated short-circuit making capacity (Icm, 690 V AC): 2.1 kA
- Power loss at rated operating conditions: 4.5 W per pole
- Pollution degree: 3
- Enclosure protection rating: IP65
- Enclosure impact resistance: IK08
- Enclosure material: Glass-fibre-reinforced polycarbonate
- Enclosure UV protection: UV-protected
- Handle type: Selector handle
- Handle colour: Black
- Operating positions: ON/OFF
- Handle locking: Padlockable in OFF position
- Maximum padlocks: 3
- Cover interlocking: Included
- Interlock override: Defeatable by authorised personnel
- Operating arrangement: Front operated
- Mounting arrangement: Surface mounting
- Cable-entry positions: Top and bottom
- Cable-entry type: Metric threaded knockouts
- Cable outlets per side: 2 × M32 + M16
- Main circuit connection: Screw clamp terminals
- Main circuit conductor capacity: 1.5–35 mm²
- Neutral arrangement: Fixed neutral terminal with switchable-neutral configuration
- Protective earth terminals: Included
- Line terminal arrangement: Top in – bottom out
- Auxiliary contacts included: 0 NO + 0 NC
- Maximum auxiliary contacts: 2 NO + 2 NC
- Enclosure height: 200 mm
- Enclosure width: 145 mm
- Enclosure depth: 90 mm
- Applicable standards: IEC 60947-1 and IEC 60947-3
Four-Pole Switching, Motor Isolation and Environmental Protection
The ABB OTP63B4M is designed to provide a clearly accessible means of disconnecting industrial electrical equipment from its power supply. Its four-pole switching mechanism enables four conductors to be operated together through a single external handle. This makes it particularly useful in three-phase electrical installations where the neutral conductor must also be switched, subject to the applicable electrical design and neutral-switching requirements.
The switch's electrical performance varies according to the utilisation category and operating voltage. Under AC-23A conditions, covering motor loads and other highly inductive switching duties, the OTP63B4M has a rated operational current of 75 A at 380–415 V AC and a motor switching capacity of 37 kW. At 690 V AC, its AC-23A rating is 20 A and 18.5 kW. For AC-22A duties involving mixed resistive and inductive loads, ABB specifies an operational current of 80 A at 380–415 V AC. Correct equipment selection therefore depends on the actual load characteristics rather than the model number alone.
The IP65 enclosure is manufactured from rigid, glass-fibre-reinforced polycarbonate and is designed to resist dust ingress and low-pressure water jets. Its UV-protected construction supports use in suitable indoor and outdoor locations, while the IK08 impact resistance provides additional mechanical durability. The enclosure's protective performance depends on correct mounting, suitable cable glands and proper sealing of all cable entries.
The black selector handle allows the switch to be operated without opening the enclosure and can accommodate up to three padlocks in the OFF position. The interlocked cover helps prevent ordinary access while the switch is ON, although an override facility is available for authorised servicing procedures. These features support controlled isolation practices but do not replace safe isolation verification or appropriate lockout procedures.
The OTP63B4M includes two M32 cable-entry knockouts and one M16 knockout at both the top and bottom of the enclosure, allowing installers to route power and associated control cables as required. Fixed neutral and protective earth terminals support conductor termination. As the unit is a switch disconnector rather than a circuit breaker or fuse switch, appropriate overload and short-circuit protection must be provided elsewhere in the electrical system.
Typical Applications
- Industrial three-phase electrical installations requiring four-pole isolation.
- Local isolation of appropriately rated industrial motor circuits.
- 18.5 kW AC-23A motor applications at 690 V AC.
- Manufacturing machinery and production equipment.
- Industrial pumps, fans and compressors.
- Conveyor systems and material handling equipment.
- HVAC plant and mechanical services installations.
- Packaging machinery and automated production lines.
- Industrial electrical distribution and control systems.
- OEM machinery and equipment manufacturing.
- Commercial and industrial maintenance isolation points.
- Installations requiring an IP65 enclosed four-pole switch disconnector.
