IMO IS4P20 20A 4-Pole Enclosed Rotary Isolator – IP65 Rated Compact AC Disconnect

This is the IMO IS4P20 20A 4-Pole Enclosed Rotary Isolator – a IP65 Rated Compact AC Disconnect available at SparksDirect for the best price. Purchase this item with confidence at Sparks today.

The IMO IS4P20 (part of the Stag range) is a compact, 4-pole enclosed rotary isolator. It is specifically designed for the safe isolation of AC circuits in residential and light commercial applications, making it a popular choice for solar PV installations and HVAC systems. The IMO IS4P20 is a robust, surface-mounted rotary switch designed for the manual isolation of electrical equipment. Rated at 20A, it features a 4-pole configuration that allows for the simultaneous disconnection of three phases and the neutral, or it can be utilized in single-phase systems for total circuit isolation. The unit is housed in a high-quality, flame-retardant polycarbonate enclosure with an IP65 rating, making it suitable for both indoor and outdoor use where protection against dust and water is required.

Safety is a primary design feature, with an interlocked lid that prevents the enclosure from being opened while the switch is in the "ON" position. The high-visibility red and yellow handle is padlockable in the OFF position, supporting Lockout/Tagout procedures during maintenance. Its compact footprint and multiple cable knockouts make it exceptionally versatile for tight spaces, such as near solar inverters, heat pumps, or small industrial motors.

Technical Specifications

• Model Number: IS4P20
• Type: Enclosed Rotary Isolator / Switch Disconnector
• Number of Poles: 4 Pole
• Rated Current: 20A (AC21)
• Motor Rating: 5.5kW at 415V (AC23A)
• Rated Voltage: 230V – 440V AC
• Insulation Voltage: 690V
• Ingress Protection: IP65 Enclosure / IP20 Body
• Dimensions: 125mm (H) x 100mm (W) x 85mm (D)
• Max Cable Size: 10mm²
• Standards: IEC/EN 60947-3, UKCA, CE, SEMKO

Frequently Asked Questions

Q: Is this suitable for outdoor use?

A: Yes. The enclosure is IP65 rated and constructed from UV-stabilized polycarbonate, meaning it is designed to withstand rain, dust, and exposure to sunlight on exterior walls.

Q: Can I add an auxiliary contact to this isolator?

A: Yes. This model is compatible with auxiliary contact blocks (such as the SAC32-11), which allow for remote signaling or monitoring of the switch's status (Open/Closed).

Q: What size cable entries does it have?

A: The enclosure is equipped with multiple M20 and M25 knockouts, providing flexibility for standard conduit and cable gland sizes during installation.

Who can install this?

Installation must be performed by a qualified electrician. It is critical that internal connections are tightened to the correct torque to prevent localized heating and potential fire hazards. For solar PV installations, the isolator must be placed according to local regulations, typically near the inverter or at the point of building entry.

What is this for?

The IMO IS4P20 is used for Compact AC Isolation:

• Solar PV Systems: Serving as the AC isolator between the string inverter and the generation meter or consumer unit.
• HVAC & Heat Pumps: Providing a local safety disconnect for external heat pump units and air conditioning condensers.
• Small Motors: Manual isolation for industrial fans, small pumps, and workshop machinery up to 5.5kW.
• EV Charger Isolation: Frequently used as the dedicated isolator for domestic electric vehicle charging points.

Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.

Need more detailed specs?

• ISO2-data.pdf (567.31 kB)