Double pole (DP) isolator, 40A & 63A (switch-disconnector) — single-phase main switch, 240/415 V AC, AC-22A, for safe isolation of a board or machine.
- Switch-disconnector for on-load switching — AC-22A duty, as marked.
- Rated 240/415 V AC, 50 Hz.
- Switches both the phase and the neutral of a single-phase supply together.
- ON/OFF contact-position window and a red handle, easy to spot as the main switch.
- Does not trip on overload or short circuit — pair it with an MCB, RCCB or fuse.
- 2 modules wide; snaps onto a standard 35 mm DIN rail.
- Made in India.
An isolator — also called a switch-disconnector or main switch — cuts the supply so a board, machine or appliance can be worked on safely. This Double Pole (DP) isolator switches both the phase and the neutral of a single-phase supply together.
It is a switch, not a breaker: it does not trip on overload or short circuit, so the circuit must also be protected by an MCB, RCCB or fuse.
Ratings in this listing: 40A and 63A — choose the rating from the options.
Where to use it
- Main switch of a single-phase home or shop distribution board.
- Local isolation of an AC outdoor unit, water pump or machine for servicing.
- Sub-distribution board incomer, with MCB protection upstream.
How to install
- Switch off and lock the upstream supply before working.
- Snap the isolator onto the DIN rail and connect supply and load as marked.
- Make sure the circuit is protected by an MCB, RCCB or fuse of a suitable rating.
Electrical work should be done by a licensed electrician. For AC circuits only — not for DC (solar panel) circuits.
Frequently asked questions
- What is the difference between an isolator and an MCB?
- An MCB trips automatically on overload and short circuit. An isolator is a manual on/off switch that does not trip — it is used to disconnect the supply safely, and is always paired with MCB or fuse protection.
- What does AC-22A mean?
- AC-22A is the IS/IEC 60947-3 utilisation category for on-load switching of mixed resistive and inductive loads, such as a home or shop distribution board. It describes the switching duty, not protection.
- Why a double pole isolator?
- It disconnects both phase and neutral, so a single-phase board or appliance is fully isolated for maintenance.
- Which isolator rating should I choose?
- Choose an isolator rated at or above the MCB or fuse that protects the circuit — for example a 63A isolator behind a 63A or smaller MCB.
Buy double pole isolators online from Electric Market, Chennai. For panel builders, contractors and bulk orders, contact us for a quote.