Do I need Type 1 or Type 2 surge protection?

Type 1 is required where the building has an external lightning protection system, because it must handle a direct strike's partial current. Type 2 is for distribution boards downstream, or at the incomer of a building with no lightning protection system in an area of low strike risk.

Does an SPD replace an RCCB?

No. They protect against completely different things. An SPD protects equipment from overvoltage transients lasting microseconds. An RCCB protects people from earth leakage current. An installation needs both, and the SPD must be coordinated with a backup fuse or MCB.

Surge Protection

Surge protective devices divert the energy of a lightning strike or a switching transient to earth before it reaches equipment. Type 1 goes at the incoming panel of a building with a lightning protection system, Type 2 at distribution boards, Type 3 close to sensitive equipment. Photovoltaic-specific devices protect the DC side of a solar installation. We supply Siemens, Hager and the full OBO Bettermann range, including the Type 1+2 LightningController for busbar mounting at the main panel.

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Brands we supply for surge protection

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 SENTRON 5SD surge protection devices

5SD74121RC / 5SD74610RC / 5SD74325

Siemens 5SD7 four pole Type 1 surge protection device

Surge protective devices for equipment exposed to lightning and switching surges. The range includes Type 1, Type 2 and Type 3 devices, with pluggable modules and remote signalling on selected models.

Specifications for Siemens SENTRON 5SD surge protection devices
Type 1	RC versions: total Iimp 50 or 100 kA at 10/350 µs; 1P+N and 3P+N
Type 2	Imax 20–40 kA at 8/20 µs, 1P and 3P+N
Type 3	24, 120 or 240 V AC; 26 A
Photovoltaic	1170 V DC (5SD74836RC); 1000 V DC (5SD74836); Imax 40 kA
Feature	Integrated health indicator; remote signalling on selected models

IEC 61643-11EN 61643-11

List price from ₹5,680 per piece (List price, excl. GST, price list of 1 July 2026)

See all 23 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 SPL surge protection devices

SPL212R / SPL240

Hager SPL two pole Type 2 surge protection device

Type 1+2 and Type 2 surge protective devices for distribution boards. The range includes remote-signalling models and separate replacement phase and neutral cartridges.

Specifications for Hager SPL surge protection devices
Type 1+2	Imax 12.5 kA, 2P and 4P, TNS/TT
Type 2	Imax 20, 40, 65 kA, 2P and 4P
Feature	Remote signalling on selected models; replaceable cartridges

IEC 61643-1IEC 61643-11

List price from ₹11,784 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.

OBO LightningController MCF, Type 1+2 combination arrester

MCF75-NAR-TNC+FS

OBO LightningController MCF combination arrester for busbar mounting

Lightning current and surge protection in one device for the main panel of a building with external lightning protection, or where cables enter from outdoors. Mounts directly on a 40 mm busbar and keeps connected equipment at a protection level of 1.5 kV or less.

Specifications for OBO LightningController MCF, Type 1+2 combination arrester
Type	Type 1+2 (Class I+II)
Models	MCF75-NAR-TNC, with or without remote signalling
Lightning current, MCF75	75 kA total (10/350 µs), three-pole
Protection level Up	≤ 1.5 kV
Max. continuous voltage Uc	255 V AC
Max. backup fuse	315 A gL/gG
Feature	Potential-free changeover contact on +FS version

IEC 61643-11IEC 62305IEC 60364-5-53

View on the OBO Bettermann website

Specification from the manufacturer's product page, read 27 October 2026. Confirm current details when ordering.

OBO V20 Type 2 surge arrester

V20-3+NPE-320

Modular Type 2 arrester for main and sub-distribution boards, with a cut-off unit and visual status display. FS versions include remote signalling.

Specifications for OBO V20 Type 2 surge arrester
Type	Type 2 (Class II)
Discharge current	L-N: In 20 kA, Imax 40 kA (8/20 µs)
Protection level Up	≤ 1.4 kV (320 V version, L-N)
Voltage versions Uc	320 V (L-N); 255 V (N-PE)
Poles	3+NPE
Feature	Remote signalling contact on FS versions; 5 year warranty

IEC 61643-11IEC 60364-4-44

View on the OBO Bettermann website

Specification from the manufacturer's product page, read 27 October 2026. Confirm current details when ordering.

Common questions

Do I need Type 1 or Type 2 surge protection?: Type 1 is required where the building has an external lightning protection system, because it must handle a direct strike's partial current. Type 2 is for distribution boards downstream, or at the incomer of a building with no lightning protection system in an area of low strike risk.
Does an SPD replace an RCCB?: No. They protect against completely different things. An SPD protects equipment from overvoltage transients lasting microseconds. An RCCB protects people from earth leakage current. An installation needs both, and the SPD must be coordinated with a backup fuse or MCB.

Guides

MCB, RCCB, RCBO or AFDD: which protects against what?