OTP63B3M ABB 18.5kW 3-Pole IP65 Plastic Enclosed Switch-Disconnector

Why Choose the ABB OTP63B3M 18.5kW Three-Pole IP65 Enclosed Switch?

The ABB OTP63B3M is a robust 18.5 kW three-pole plastic enclosed switch-disconnector designed for reliable electrical switching and isolation in industrial and commercial installations. Part of the established ABB OTP enclosed switch range, it combines a durable protective enclosure with a mechanically operated switch-disconnector for local isolation of motors, machinery and electrical equipment.

Featuring an IP65-rated glass-fibre-reinforced polycarbonate enclosure, the OTP63B3M is suitable for demanding environments where protection against dust and water ingress is required. Its black selector handle provides straightforward ON/OFF operation, while the padlockable mechanism and interlocked enclosure cover support controlled maintenance isolation.

The OTP63B3M is specified with an 18.5 kW motor rating at 690 V AC under AC-23A conditions. At 380–415 V AC, ABB specifies an AC-23A rating of 37 kW and 75 A. These voltage-dependent ratings are important when selecting the switch for a particular motor or inductive load.

With a compact enclosure measuring 200 × 145 × 90 mm, metric cable-entry knockouts, fixed neutral and protective earth terminals, the OTP63B3M provides a practical enclosed isolation solution for industrial electrical contractors, machinery manufacturers and maintenance engineers.

Key Advantages

• Three-pole (3P) switching for three-phase electrical isolation.
• 18.5 kW AC-23A motor rating at 690 V AC.
• 37 kW AC-23A motor rating at 380–415 V AC.
• 75 A AC-23A operational current at 380–415 V AC.
• 80 A conventional enclosed thermal current.
• IP65 enclosure protection against dust ingress and water jets.
• UV-protected glass-fibre-reinforced polycarbonate housing.
• Black selector handle with padlocking provision.
• Interlocked enclosure cover with defeatable interlocking for authorised servicing.
• Metric threaded cable-entry knockouts for practical installation.
• Fixed neutral and protective earth terminals.
• Suitable for indoor and appropriately installed outdoor applications.
• Compact enclosure for mounting close to industrial machinery.

Key Features

• ABB OTP plastic enclosed switch-disconnector series.
• OTP63B3M model designation.
• Three main switching poles.
• Manual rotary ON/OFF operation.
• Black selector-type operating handle.
• Handle padlockable with up to three padlocks.
• Interlocked enclosure cover with defeatable interlocking.
• IP65 ingress protection.
• IK08 enclosure impact resistance.
• Grey, UV-protected, glass-reinforced polycarbonate housing.
• 2 × M32 + M16 cable-entry knockouts at the top and bottom.
• Fixed neutral and protective earth terminals.
• Conductor connection capacity of 1.5–35 mm².
• Provision for compatible auxiliary contacts.
• Designed for fixed installation as an industrial enclosed isolator.

Technical Specifications

• Manufacturer: ABB
• Series: OTP Plastic Enclosed Switches
• Model: OTP63B3M
• ABB order code: OTP63B3M
• ABB manufacturer product ID: 1SCA022383R3450
• Product type: Plastic enclosed switch-disconnector
• Product group: 311004-Plastic Enclosed Switches (OTP)
• Number of poles: 3
• Pole configuration: 3P
• Rated operational power AC-23A at 380–415 V AC: 37 kW
• Rated operational power AC-23A at 500 V AC: 37 kW
• Rated operational power AC-23A at 690 V AC: 18.5 kW
• Rated operational current AC-23A at 380–415 V AC: 75 A
• Rated operational current AC-23A at 500 V AC: 58 A
• Rated operational current AC-23A at 690 V AC: 20 A
• Rated operational current AC-22A at 380–415 V AC: 80 A
• Rated operational current AC-21A at 380–415 V AC: 80 A
• Conventional enclosed thermal current: 80 A
• Rated operational voltage: 750 V AC
• Rated insulation voltage (Ui): 750 V
• Rated impulse withstand voltage (Uimp): 1.5 kV
• Rated short-time withstand current (Icw): 1.5 kA for 1 s
• Rated short-circuit making capacity (Icm): 2.1 kA at 690 V AC
• Ingress protection: IP65
• Impact resistance: IK08
• Enclosure material: Glass-fibre-reinforced polycarbonate plastic
• Enclosure colour: Grey
• Handle colour: Black
• Handle type: Selector handle
• Operating positions: ON/OFF
• Handle locking: Padlockable, up to three padlocks
• Cover interlock: Interlocked with defeatable interlocking
• Cable-entry positions: Top and bottom
• Cable-entry arrangement: 2 × M32 + M16 per side
• Main circuit conductor capacity: 1.5–35 mm²
• Neutral terminal: Fixed
• Protective earth terminals: Included
• Factory-mounted auxiliary contacts: 0 NO + 0 NC
• Maximum auxiliary contact provision: 2 NO + 2 NC
• Main terminal tightening torque: 2 N·m
• Wire stripping length: 13 mm
• Enclosure height: 200 mm
• Enclosure width: 145 mm
• Enclosure depth: 90 mm
• Dimensions (H × W × D): 200 × 145 × 90 mm
• Net weight: Approximately 0.9 kg
• EAN / GTIN: 6417019124971
• Country of origin: Finland
• Applicable standards: IEC 60947-1 and IEC 60947-3

Reliable Motor and Machinery Isolation

The ABB OTP63B3M provides a dedicated local switching point for industrial machinery and three-phase electrical equipment. Its three-pole mechanism enables simultaneous disconnection of the three phase conductors, helping maintenance personnel isolate equipment before inspection, servicing or repair.

The switch is rated for different operational currents and motor powers according to voltage and IEC utilisation category. Under AC-23A conditions, ABB specifies 37 kW at 380–415 V AC and 18.5 kW at 690 V AC. These values should be considered separately from the 80 A conventional enclosed thermal current when assessing suitability for a particular installation.

The black selector handle provides clearly identifiable ON/OFF operation and can be secured using up to three padlocks. This supports controlled maintenance isolation procedures and helps prevent unintended operation while authorised personnel are working on electrical equipment.

The enclosure cover is mechanically interlocked with the operating mechanism and includes a defeatable interlocking feature for authorised servicing. The switch must be installed and operated in accordance with the manufacturer's instructions and applicable electrical safety procedures.

IP65 Enclosure Protection and Practical Installation

The OTP63B3M incorporates a UV-protected, glass-fibre-reinforced polycarbonate enclosure designed for industrial use. Its IP65 rating provides dust-tight protection and resistance to water jets when the enclosure and cable entries are correctly installed and sealed.

The enclosure includes metric threaded knockouts at the top and bottom, allowing installers to accommodate power and control cables using suitable cable glands. The 2 × M32 + M16 arrangement per side supports flexible cable routing within machinery and electrical distribution installations.

Fixed neutral and protective earth terminals are included for convenient wiring. The neutral terminal is not one of the three main switched poles. The switch also provides for the installation of compatible auxiliary contacts where additional indication or control functionality is required.

With an enclosure size of 200 × 145 × 90 mm, the OTP63B3M is suitable for local mounting near motors, conveyors, pumps and industrial equipment where a compact enclosed switch-disconnector is required.

Typical Applications

• Industrial three-phase motor isolation.
• Local safety switching for manufacturing machinery.
• Motor installations rated within the applicable AC-23A switching limits.
• Industrial pumping and ventilation equipment.
• Conveyor and material handling systems.
• Food processing and packaging machinery.
• Industrial electrical distribution installations.
• Outdoor equipment requiring appropriately installed IP65 enclosures.
• Factory maintenance and equipment isolation points.
• OEM machinery and industrial equipment manufacturing.
• Commercial and industrial low-voltage electrical installations.