What is the difference between an MCB and an RCCB?

An MCB protects the wiring from overload and short circuit, meaning too much current. An RCCB protects people from electric shock by detecting current leaking to earth, typically at 30 mA. They do different jobs, so most installations need both.

Which MCB curve should I use: B, C or D?

B curve trips at 3–5 times rated current, for resistive loads like lighting and heaters. C curve trips at 5–10 times, the general-purpose choice for mixed domestic and commercial circuits. D curve trips at 10–20 times, for motors and transformers with high inrush.

What sensitivity of RCCB do I need?

30 mA for personal protection on socket and lighting circuits - this is the level that protects against electric shock. 100 mA or 300 mA is used for fire protection on incoming or sub-main circuits, where nuisance tripping from normal leakage would otherwise be a problem.

What is an AFDD and do I need one?

An arc fault detection device spots the arcing in damaged or loose wiring that causes electrical fires but does not draw enough current to trip an MCB. It is not yet mandatory in India, but is worth specifying in hospitals, schools, hotels and data centres.

MCBs, RCCBs & RCBOs

The devices that disconnect a circuit before it hurts someone or starts a fire. Miniature circuit breakers handle overload and short circuit; residual current devices detect the small leakage currents that flow through a person; RCBOs combine both in one device. We stock Siemens Betagard and Hager across breaking capacities from 6 kA to 15 kA, in B, C, D, K and Z tripping curves.

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Brands we supply for mcbs, rccbs & rcbos

Siemens
Germany
Global switchgear engineering, from a 6 A domestic MCB to arc-fault detection.
Hager
Germany
The only line in the portfolio that runs unbroken from a 6 A MCB to a 4000 A air circuit breaker.

Range

A representative selection. Our full range in this category runs to considerably more line items - if you need something not shown here, ask and we will check the current price list.

Siemens Betagard 5SL6 MCB, 1 pole, C curve

5SL61167RC

Siemens Betagard 5SL6 single pole C curve MCB

Single pole C curve breaker for domestic and commercial distribution. The slide latch-release allows removal from a busbar-mounted DIN rail assembly without disturbing neighbouring devices.

Specifications for Siemens Betagard 5SL6 MCB, 1 pole, C curve
Rated current	0.5 – 63 A
Breaking capacity	7.5 kA
Poles	1P
Voltage	240 / 415 V AC
Module width	1 MW = 18 mm
Curve	C

IS/IEC 60898-1:2015ISI CM/L-2255548

List price from ₹432 per piece (MRP, incl. GST, price list of 1 July 2026)

See all 16 list prices in this range

View on the Siemens website

Specification from the manufacturer price list effective 1 July 2026. Confirm current details when ordering.

Siemens Betagard 5SL4 MCB, 10 kA, C curve

5SL41167RC

Siemens Betagard 5SL4 single pole 10 kA MCB

Single pole C curve breaker for final distribution, with a 10 kA breaking capacity. Part of the Betagard 5SL range for building installations.

Specifications for Siemens Betagard 5SL4 MCB, 10 kA, C curve
Rated current	0.5 – 63 A
Breaking capacity	10 kA
Poles	1P
Curve	C

IS/IEC 60898-1:2015ISI CM/L-2255548

List price from ₹523 per piece (MRP, incl. GST, price list of 1 July 2026)

See all 15 list prices in this range

View on the Siemens website

Specification from the manufacturer price list effective 1 July 2026. Confirm current details when ordering.

Siemens Betagard 5SL7 MCB, K curve

5SL71163RC

K curve trips instantaneously between 10 and 14 times rated current, so it rides through the inrush of motors, transformers and other inductive loads without nuisance tripping. For industrial, infrastructure and process automation.

Specifications for Siemens Betagard 5SL7 MCB, K curve
Rated current	2 – 63 A
Breaking capacity	15 kA (10 kA at 40–63 A)
Curve	K - trips at 10–14 × In
Poles	1P, 2P, 3P, 4P

IS/IEC 60947-2:2016

List price from ₹720 per piece (MRP, incl. GST, price list of 1 July 2026)

See all 40 list prices in this range

View on the Siemens website

Specification from the manufacturer price list effective 1 July 2026. Confirm current details when ordering.

Siemens Betagard 5SV RCCB, Type AC and Type A

5SV43120RC / 5SV33126RC

Siemens 5SV4 residual current circuit breaker

Residual current circuit breakers for building distribution. Type AC detects alternating residual currents; Type A also detects pulsating DC residual currents.

Specifications for Siemens Betagard 5SV RCCB, Type AC and Type A
Rated current	25, 40, 63, 80 A
Sensitivity	30, 100, 300 mA
Poles	2P and 4P
Surge withstand	> 1000 A at 8/20 µs (Type A)

IS 12640 (Part 1):2016IEC 61008-1:2012ISI CM/L-7676092

List price from ₹5,485 per piece (MRP, incl. GST, price list of 1 July 2026)

See all 48 list prices in this range

View on the Siemens website

Specification from the manufacturer price list effective 1 July 2026. Confirm current details when ordering.

Siemens SENTRON 5SV6 arc fault detection device

5SV60166KK16 / 5SV63167KK16

Siemens 5SV6 arc fault detection device with integrated MCB

Arc fault detection for new and existing distribution boards. Detects dangerous series and parallel arcing faults, with versions combining the AFDD with an MCB or an RCBO in an 18 mm module.

Specifications for Siemens SENTRON 5SV6 arc fault detection device
Rated current	6 – 40 A
Module width	1 MW = 18 mm
Curve	B and C
Variants	With integrated MCB, or with integrated RCBO (30 mA Type A)

List price from ₹52,945 per piece (List price, excl. GST, price list of 1 July 2026)

See all 38 list prices in this range

View on the Siemens website

Specification from the manufacturer price list effective 1 July 2026. Confirm current details when ordering.

Hager MCB, C curve, 10 kA

NCN106N

C curve breakers from 2 A to 63 A for domestic and commercial distribution, in one, two, three and four pole versions. B and D curve variants are also available in the range.

Specifications for Hager MCB, C curve, 10 kA
Rated current	2 – 63 A (C curve)
Breaking capacity	10 kA
Poles	1P, 2P, 3P, 4P
Curve	C (also NBN = B curve, NDN = D curve)

IS/IEC 60898-1IEC 60898

List price from ₹488 per piece (MRP, incl. GST, price list of 1 September 2026)

See all 124 list prices in this range

View on the Hager website

Specification from the manufacturer price list effective 1 September 2026. Confirm current details when ordering.

Hager compact two pole RCBOs

AD956Y / AE966Y / AF990Y / ADH966

Compact breakers combining overload, short-circuit and earth-leakage protection for final distribution circuits. The range includes standard and high immunity versions, with an earth fault indicator.

Specifications for Hager compact two pole RCBOs
Rated current	6–40 A standard; 16–40 A high immunity
Sensitivity	30, 100 or 300 mA, depending on rating and version
Breaking capacity	6 kA
Poles / width	2P / 2 modules

IEC 61009

List price from ₹8,973 per piece (MRP, incl. GST, price list of 1 September 2026)

See all 26 list prices in this range

Specification from the manufacturer price list effective 1 September 2026. Confirm current details when ordering.

Hager RCCB type Hi (high immunity)

CH240J / CQ263J

High immunity residual current circuit breakers for electrical networks with high harmonics, pulsating DC currents and transients. Includes earth fault and positive contact indication.

Specifications for Hager RCCB type Hi (high immunity)
Rated current	25 A (2P); 40 and 63 A (2P and 4P)
Sensitivity	30 and 300 mA, depending on rating
Poles	2P and 4P
Feature	Earth fault indicator and positive contact indication

IEC 61008EN 61543

List price from ₹11,888 per piece (MRP, incl. GST, price list of 1 September 2026)

See all 8 list prices in this range

View on the Hager website

Specification from the manufacturer price list effective 1 September 2026. Confirm current details when ordering.

Common questions

What is the difference between an MCB and an RCCB?: An MCB protects the wiring from overload and short circuit, meaning too much current. An RCCB protects people from electric shock by detecting current leaking to earth, typically at 30 mA. They do different jobs, so most installations need both.
Which MCB curve should I use: B, C or D?: B curve trips at 3–5 times rated current, for resistive loads like lighting and heaters. C curve trips at 5–10 times, the general-purpose choice for mixed domestic and commercial circuits. D curve trips at 10–20 times, for motors and transformers with high inrush.
What sensitivity of RCCB do I need?: 30 mA for personal protection on socket and lighting circuits - this is the level that protects against electric shock. 100 mA or 300 mA is used for fire protection on incoming or sub-main circuits, where nuisance tripping from normal leakage would otherwise be a problem.
What is an AFDD and do I need one?: An arc fault detection device spots the arcing in damaged or loose wiring that causes electrical fires but does not draw enough current to trip an MCB. It is not yet mandatory in India, but is worth specifying in hospitals, schools, hotels and data centres.

MCBs, RCCBs & RCBOs

Brands we supply for mcbs, rccbs & rcbos

Siemens

Hager

Range

Common questions

Guides