Polycab DP RCCB 300 mA – 2 Pole Residual Current Circuit Breaker, 25 / 40 / 63 A, IS 12640-1

The Polycab DP RCCB 300 mA is a double pole (2 pole) residual current circuit breaker (RCCB) with 300 mA sensitivity, made to IS 12640-1 / IEC 61008-1 for a single-phase supply - phase and neutral. It switches the supply off when current leaks to earth through damaged insulation or faulty equipment; for protection of people against electric shock, use the 30 mA version. Polycab lists it in 25, 40 and 63 A at MRP Rs 3,182 to Rs 4,381 per piece (polycab.com, October 2026).

Polycab India Limited is India's largest manufacturer of wires and cables, with 27 manufacturing facilities, 4,300+ authorised distributors, 2,00,000+ retailers and an export presence in 84 countries (polycab.com, October 2026). Its switchgear range covers MCBs, RCCBs, RCBOs, isolators, changeover switches, ACCLs and distribution boards. Jai Enterprises supplies Polycab RCCBs from Bhilai and Raipur all over Chhattisgarh - Bhilai, Raipur, Durg, Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India.

Is this the right one for you?

Check these five things before you order:

• You need earth-leakage protection for a single-phase supply - phase and neutral (double pole).
• 300 mA suits the job: fire protection for the whole installation.
• An MCB or fuse upstream gives the overload and short-circuit protection - an RCCB does not.
• Its rated current (25, 40 or 63 A) is at least equal to the rating of the MCB that protects it.
• Circuits where people need shock protection will have their own 30 mA RCCBs or RCBOs.

At a glance

• MRP: Rs 3,182 - 4,381 per piece (polycab.com, October 2026, inclusive of taxes)
• Product: Polycab DP RCCB 300 mA
• Type: residual current circuit breaker (RCCB), electromechanical
• Poles: DP - double pole (2 pole)
• Sensitivity: 300 mA
• Rated currents: 25, 40 and 63 A
• Short-circuit withstand: 10 kA (Polycab catalogue) - a short circuit is cleared by the MCB or fuse ahead of it
• Standard: IS 12640-1 / IEC 61008-1
• Item codes: GMR502P015, GMR502P017 and GMR502P018

Ratings, item codes and MRP

• 25 A: item code GMR502P015 - MRP Rs 3,182
• 40 A: item code GMR502P017 - MRP Rs 3,467
• 63 A: item code GMR502P018 - MRP Rs 4,381
• MRP basis: MRPs as listed on polycab.com, October 2026, inclusive of taxes; the selling price is confirmed on enquiry

Why choose the Polycab DP RCCB 300 mA

• Larger terminals
• Real trip indicator - shows when it has tripped on a fault
• Test button to check the device
• Lockable knob for safe maintenance
• Air-flow channels
• Functionally independent of line voltage (electromechanical) - it does not depend on the supply voltage to trip
• Busbar or cable termination on both sides
• Line-load reversibility - it can be fed from the top or the bottom
• Label holder to identify the load
• Terminal shutter that stops a wire going into the wrong place during installation
• Combi-head screws and neutral marking (Polycab catalogue)
• Polycab item code and MRP for every rating - GMR502P015, GMR502P017 and GMR502P018

How to choose and fit it

Sensitivity. 300 mA is used for protection against fires started by earth-leakage currents, for a whole installation or a large section of it; it does not protect people against electric shock. Polycab makes this RCCB in 30, 100 and 300 mA.

It does not replace the MCB. An RCCB detects earth leakage only. It has no overload or short-circuit protection, so it is always used with an MCB or fuse - usually the incomer MCB of the distribution board ahead of it.

Rated current. 25, 40 or 63 A is the current the RCCB can carry continuously. Choose a rating at least equal to the MCB that protects it.

Poles. The double pole version is for a single-phase supply - phase and neutral. For a three-phase supply use the four-pole version.

Testing. Press the test button regularly - many electricians advise once a month - to check that it still trips.

Where it is used

• fire protection of a whole building or a large section of it - main incomers of shops, offices and factories
• used together with 30 mA RCCBs or RCBOs on the circuits where people need shock protection - where it sits ahead of them, your electrician checks that both do not trip on the same fault

Other Polycab RCCBs

• Polycab DP RCCB 30 mA - 25 A to 63 A, MRP Rs 3,075 - 4,333
• Polycab DP RCCB 100 mA - 25 A to 63 A, MRP Rs 3,182 - 4,381
• Polycab DP RCCB 300 mA (this page) - 25 A to 63 A, MRP Rs 3,182 - 4,381
• Polycab FP RCCB 30 mA - 25 A to 63 A, MRP Rs 4,025 - 4,571
• Polycab FP RCCB 100 mA - 25 A to 63 A, MRP Rs 4,096 - 4,630
• Polycab FP RCCB 300 mA - 25 A to 63 A, MRP Rs 4,096 - 4,630

Related products

• Polycab SPN RCBO 300 mA - earth-leakage and overcurrent protection in one device
• Polycab 10kA C-Curve DP MCB - the incomer MCB that protects the RCCB
• Polycab SPN double-door distribution board
• All Polycab switchgear

Frequently asked questions

What does 300 mA mean on an RCCB?

It is the leakage current at which the RCCB trips. A 300 mA RCCB is used for protection against fires started by earth-leakage currents, for a whole installation or a large section of it; it does not protect people against electric shock.

Does an RCCB protect against overload and short circuit?

No. An RCCB only detects current leaking to earth. Use it with an MCB or fuse for overload and short-circuit protection, or use an RCBO, which does both.

Which rated current should I choose - 25, 40 or 63 A?

At least the rating of the MCB that protects the RCCB. For example, behind a 32 A incomer MCB choose a 40 A RCCB; behind a 63 A incomer choose 63 A.

Why does my RCCB trip?

Usually because current is leaking to earth - from damp wiring, a faulty appliance or a damaged cable. Switch off the circuits, reset the RCCB and switch them on one at a time to find the faulty one; ask an electrician to check it.

What is the MRP of the Polycab DP RCCB 40 A 300 mA?

Rs 3,467 per piece, item code GMR502P017 - the MRP listed on polycab.com in October 2026, inclusive of taxes. Call +91 9340081159 for the selling price and stock.

Where can I buy the Polycab DP RCCB 300 mA in Chhattisgarh?

From Jai Enterprises, Bhilai and Raipur, which supplies Polycab switchgear all over Chhattisgarh - Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India. Call +91 9340081159 with the rating, quantity and delivery location and we will confirm the price, stock and lead time.

How to order

Supplied by Jai Enterprises, Bhilai and Raipur, to every district of Chhattisgarh and across India. Polycab lists the DP RCCB 300 mA at MRP Rs 3,182 - 4,381 per piece (polycab.com, October 2026, inclusive of taxes). Call +91 9340081159 or send an enquiry from this page with the rating, the quantity (pieces) and the delivery location, and we will confirm the selling price, stock and lead time.