Why Choose the ABB OTP63B4U 63A 4-Pole IP65 Plastic Enclosed Switch Disconnector?
The ABB OTP63B4U, manufacturer order code 1SCA116044R1001, is a robust four-pole plastic enclosed switch disconnector designed for dependable electrical switching and isolation in industrial and commercial installations. Part of the established ABB OTP enclosed switch range, this model combines a durable IP65 enclosure, a black rotary selector handle and a four-pole switching mechanism to provide a practical local isolation point for machinery, electrical equipment and low-voltage distribution circuits.
Identified as a 63 A-class enclosed switch, the OTP63B4U provides a 75 A AC-23A operational current rating at 415 V AC and an 80 A AC-22A rating at 415 V AC, according to ABB's enclosed switch-disconnector catalogue. Its motor switching capability is 37 kW at 415 V AC under AC-23A conditions. The four-pole arrangement allows four conductors to be disconnected together, making it suitable for appropriately designed three-phase installations requiring a switched neutral.
A distinguishing feature of the OTP63B4U is its blank enclosure without pre-formed cable-entry knockouts. Unlike metric-entry variants such as the OTP63B4M, this model allows the installer to position and prepare cable-entry holes to suit the installation. The rigid glass-fibre-reinforced polycarbonate enclosure is UV protected and rated IP65, making it suitable for indoor and appropriately installed outdoor applications. Its black padlockable selector handle, cover interlock and compact construction support convenient operation and controlled maintenance isolation.
Key Advantages
- Four-pole switching configuration allows simultaneous disconnection of four electrical conductors.
- 63 A-class switch disconnector for industrial electrical isolation applications.
- 75 A AC-23A operational current rating at 415 V AC for motor and highly inductive switching duties.
- 80 A AC-22A operational current rating at 415 V AC for suitable mixed resistive and inductive loads.
- 37 kW motor switching capability at 415 V AC under AC-23A conditions.
- IP65-rated enclosure protects against dust ingress and water jets when correctly installed.
- Blank enclosure without pre-formed knockouts provides flexibility when positioning cable entries.
- Black rotary selector handle provides convenient external ON/OFF operation.
- Padlockable OFF position supports controlled maintenance isolation.
- Interlocked enclosure cover helps restrict access while the switch is in the ON position.
- UV-protected, glass-fibre-reinforced polycarbonate construction supports demanding industrial environments.
- Fixed neutral and protective earth terminals provide convenient conductor termination.
- Auxiliary contact compatibility allows optional switching indication and monitoring.
- Compact surface-mounted design is suitable for local machinery and equipment isolation.
Key Features
- Manufacturer: ABB.
- Model: OTP63B4U.
- Manufacturer order code: 1SCA116044R1001.
- Product series: ABB OTP Plastic Enclosed Switches.
- Product type: Enclosed switch disconnector.
- Number of switched poles: 4.
- Rated operational current, AC-22A at 415 V: 80 A.
- Rated operational current, AC-23A at 415 V: 75 A.
- Rated motor switching power, AC-23A at 415 V: 37 kW.
- Rated motor switching power, AC-23A at 690 V: 18.5 kW.
- Enclosure protection rating: IP65.
- Enclosure construction: Rigid glass-fibre-reinforced polycarbonate.
- Enclosure UV protection: UV-protected.
- Operating handle: Black rotary selector handle.
- Handle indication: I–0 / ON–OFF.
- Handle locking: Padlockable OFF position.
- Cover interlocking: Included.
- Interlock override: Defeatable by authorised personnel.
- Cable-entry configuration: Blank enclosure, without pre-formed knockouts.
- Cable-entry preparation: Installer-created holes.
- Neutral terminal: Fixed neutral terminal included.
- Protective earth terminal: Included.
- Auxiliary contacts supplied: None.
- Maximum auxiliary contact arrangement: 2 NO + 2 NC.
- Mounting: Surface mounting.
Technical Specifications
- Manufacturer: ABB
- Product series: OTP
- Model: OTP63B4U
- Manufacturer order code: 1SCA116044R1001
- ABB product group: 311004 – Plastic Enclosed Switches (OTP)
- Product description: 63 A-class, 4-pole, IP65 plastic enclosed switch without cable-entry knockouts
- Product category: Enclosed switch disconnectors
- Number of switched poles: 4
- Rated operational current (AC-22A, 415 V AC): 80 A
- Rated operational current (AC-23A, 415 V AC): 75 A
- Rated motor switching power (AC-23A, 415 V AC): 37 kW
- Rated motor switching power (AC-23A, 690 V AC): 18.5 kW
- Rated motor switching current (AC-23A, 690 V AC): 20 A
- Utilisation categories: AC-22A and AC-23A
- Rated short-time withstand current: 1.5 kA
- Switching function: Manual load switching and electrical isolation
- Enclosure protection rating: IP65
- Enclosure material: Glass-fibre-reinforced polycarbonate
- Enclosure UV protection: UV-protected
- Handle type: Rotary selector handle
- Handle colour: Black
- Operating positions: ON/OFF
- Handle locking: Padlockable in the OFF position
- Cover interlocking: Included
- Interlock override: Defeatable interlock arrangement
- Operating arrangement: Front operated
- Mounting arrangement: Surface mounting
- Cable-entry configuration: Blank enclosure
- Pre-formed cable-entry knockouts: None
- Cable-entry preparation: Holes to be made by the installer
- Cable-entry positions: Installer-defined, subject to enclosure and installation requirements
- Cable glands: Select separately to suit the prepared openings and required IP protection
- Neutral terminal: Fixed neutral terminal included
- Protective earth terminal: Included
- Auxiliary contacts included: 0 NO + 0 NC
- Maximum auxiliary contact configuration: 2 NO + 2 NC
- Enclosure height: 200 mm
- Enclosure width: 145 mm
- Enclosure depth: 90 mm
- Approximate unit weight: 1.0 kg
- Relevant product standard: IEC/EN 60947-3
Flexible Cable Entry and Reliable Four-Pole Electrical Isolation
The ABB OTP63B4U provides a practical solution for electrical installations requiring four-pole manual switching and isolation. Its four switched poles operate together through the external selector handle, allowing the connected conductors to be disconnected as part of a correctly designed electrical system. This arrangement is particularly useful in three-phase installations where the neutral conductor must be switched alongside the three phase conductors.
One of the principal advantages of the OTP63B4U is its blank enclosure without pre-formed cable-entry knockouts. Instead of working around predetermined metric or PG cable openings, installers can prepare the cable entries to suit the incoming and outgoing wiring arrangement. This makes the model useful where cable routes, conduit positions or gland sizes differ from standard enclosure configurations. All holes must be prepared carefully, with suitable glands and seals selected to preserve the enclosure's protection rating.
The electrical ratings must be considered according to the intended utilisation category. ABB lists the OTP63B4U at 80 A under AC-22A conditions and 75 A under AC-23A conditions at 415 V AC. AC-22A applies to mixed resistive and inductive loads, while AC-23A covers motor loads and other highly inductive switching duties. The corresponding AC-23A motor switching capacity is 37 kW at 415 V AC and 18.5 kW at 690 V AC. The appropriate rating depends on the operating voltage and connected load.
The enclosure is manufactured from rigid glass-fibre-reinforced polycarbonate and is UV protected for use in suitable indoor and outdoor environments. Its IP65 rating provides protection against dust and low-pressure water jets when the enclosure is correctly installed and sealed. The black selector handle provides clear ON/OFF operation, while the cover interlock and padlockable OFF position help support controlled maintenance procedures. The interlock can be defeated by authorised personnel where permitted by the manufacturer's instructions and applicable safe working practices.
The OTP63B4U includes fixed neutral and protective earth terminals, together with provision for optional auxiliary contacts. It is important to distinguish the device's switching and isolation functions from overcurrent protection: the OTP63B4U is a switch disconnector, not a circuit breaker or fuse switch. Appropriate overload and short-circuit protective devices must be provided elsewhere in the installation. Before maintenance, personnel should follow the applicable isolation, locking and absence-of-voltage verification procedures.
Typical Applications
- Three-phase electrical installations requiring four-pole isolation.
- Industrial machinery and equipment isolation.
- Motor circuits within the specified AC-23A ratings.
- Manufacturing machinery and production lines.
- Industrial pumps, fans and compressors.
- Conveyor systems and material handling equipment.
- HVAC plant and mechanical services installations.
- Electrical distribution and machinery control systems.
- Commercial and industrial maintenance isolation points.
- OEM machinery and electrical equipment manufacturing.
- Installations requiring custom-positioned cable entries.
- Projects where a blank IP65 enclosure without pre-formed knockouts is preferred.
