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    AI Overview
    The Ultimate Protection: Type 2 40kA Surge Protector - LSP
    Type 2 40kA SPD (Surge Protective Devices) are designed for AC power systems to protect sensitive electrical equipment and appliances from transient overvoltages (e.g., switching surges, indirect lightning). They are commonly installed in sub-distribution boards or residential panels with a 35mm DIN rail and feature a maximum discharge current (
    Imaxcap I sub m a x end-sub
    𝐼𝑚𝑎𝑥
    ) of 40kA. 
    Key Features and Specs 
    • Protection Class: Type 2 (Class II/Class C).
    • Max Discharge Current (
      Imaxcap I sub m a x end-sub
      𝑰𝒎𝒂𝒙
      ):       40kA.
    • Nominal Discharge Current (
      Incap I sub n
      𝑰𝒏
      ):       Typically 20kA.
    • Operating Voltage (
      Uccap U sub c
      𝑼𝒄
      ):       Commonly 275V, 385V, or 440V AC.
    • Application: Suitable for TN-S, TN-C, and TT network configurations.
    • Design: Usually pluggable modules for easy replacement, often with a visual status indicator (red/green). 
    Common Models/Types 
    • Hager T2 Surge Arrester SPB440D: 4P, 40kA, designed for 4-module din-rail mounting.
    • Mersen SP2-40K275V: 1P 275V replacement cartridge.
    • General 2P/4P 40kA SPD: Widely available generic options for 230/400V, popular on sites like eBay. 
    These devices typically offer a voltage protection level (
    Upcap U sub p
    𝑈𝑝
    ) of
    ≤is less than or equal to
    ≤
     1.5 kV, protecting components like TVs, PCs, and smart appliances. 
    • Why Should You Fit a Type 2 SPD?
      Feb 11, 2024 — so let's take a look at some of the benefits of having this new consumer unit fitted. and if we start on the far right hand side a...
      2:31
      YouTube·GSH Electrical
    • 40ka type 2 ac spd 4p power surge protective device
      Type 2 AC SPD 4P 40kA 230V 275V AC power surge protective device is used in AC power supply system (50/60Hz) and low-voltage contr...
      Anhui Jinli Electric Tech. Co., Ltd
    • Surge Protective Devices SPD T2
      Type 2 surge protective devices (SPDs) are used to protect equipment against overvoltages. They are usually used as the second pro...
      ABB
    Show all
    • Why Should You Fit a Type 2 SPD?
      Feb 11, 2024 — so let's take a look at some of the benefits of having this new consumer unit fitted. and if we start on the far right hand side a...
      2:31
      YouTube·GSH Electrical
    • 40ka type 2 ac spd 4p power surge protective device
      Type 2 AC SPD 4P 40kA 230V 275V AC power surge protective device is used in AC power supply system (50/60Hz) and low-voltage contr...
      Anhui Jinli Electric Tech. Co., Ltd
    • Surge Protective Devices SPD T2
      Type 2 surge protective devices (SPDs) are used to protect equipment against overvoltages. They are usually used as the second pro...
      ABB
    • What sets Type 1 and Type 2 Surge Protective Devices (SPD) apart from ...
      Oct 31, 2012 — Type 1 SPDs provide the first line of defense against high-energy surges entering from external sources. Type 2 SPDs offer downstr...
      Schneider Electric
    • AC Surge Protector Protection AC SPD 1P+N 20KA~40KA C ~ ...
      About this Item. 【Effective Circuit Protection】The surge protector perfectly protects the electrical system from lightning strikes...
      Amazon.com
    • Type 2 SPD and How do Surge Protection Devices Work​
      Jul 23, 2025 — modern villas are packed with smart appliances. and sensitive electronics all requiring clean stable power that's why installing a...
      1m
      YouTube·Surge Protective Device - LSP
    • DOML01740 - Surge Protection Device, Domae, 3P+N, T2, 40 ...
      Specifications ; [Imax] maximum discharge current, 40 kA ; [Uc] maximum continuous operating voltage, Common mode: 340 V L/PE Comm...
      Schneider Electric
    • Hager T2 TNS/TT 4P 40KA Surge Arrester SPB440D
      Hager T2 TNS/TT 4P 40KA Surge Arrester SPB440D Rated operating voltage: 240 - 415V Max. voltage permanent regime com mode 275V Num...
      Elettronew
    • Go to product viewer dialog for this item.
      Hager T2 Surge Arrester SPB440D
      Type 2 (T2) surge protective device, designed for electrical systems with TN-S and TT configurations. It guarantees a continuous o...
      Google
    • The Ultimate Protection: Type 2 40kA Surge Protector - LSP
      A 40kA Surge Protector is a tool that guards electrical systems. It protects them from sudden voltage increases, often caused by l...
      lsp.global
    • Go to product viewer dialog for this item.
      Mersen SP2-40K275V Surge Protection Accessory Signal
      SP2-40K275V Mersen Type 2 1P 230V Replacement Cartridge (275V, 230V, 1 Pole, 275 volt, 20Ka) delivers robust, standards-compliant ...
      Google
    • Go to product viewer dialog for this item.
      SPD Surge Protector Protective Device AC 40kA 2P 270V 385V 440V Surge Arrester
      Type 2 Surge Arrester GSP8. Circuit Breaker. NOTE: GSP8-40 2P,4P is suitable for TN-S system, 3P is suitable for TN-C system. Surg...
      Google
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    My Ad Center
    Images
    Type 2 DC SPD, Imax 40kA, Class II PV Surge Protective Device
    Type 2 DC SPD, Imax 40kA, Class II PV Surge Protective Device
    ETEK China
    SPD T2 - Surge Protective Devices | Surge Protective Devices ...
    SPD T2 - Surge Protective Devices | Surge Protective Devices ...
    ABB
    Best 275v type 2 40ka ac power surge protective device spd ...
    Best 275v type 2 40ka ac power surge protective device spd ...
    Anhui Jinli Electric Tech. Co., Ltd
    The Ultimate Protection: Type 2 40kA Surge Protector - LSP
    The Ultimate Protection: Type 2 40kA Surge Protector - LSP
    LSP
    Supply 40kA Pluggable Surge Protective Device SPD Wholesale ...
    Supply 40kA Pluggable Surge Protective Device SPD Wholesale ...
    Thermally Protected MOV, UL1449 Din Rail Surge Protective ...
    40ka AC SPD Type 2 Solar Surge Protector Device
    40ka AC SPD Type 2 Solar Surge Protector Device
    Wenzhou Leeyee Electric Co., Ltd.
    Type 2 AC SPD, Imax 40kA, Class II Surge Protective Device
    Type 2 AC SPD, Imax 40kA, Class II Surge Protective Device
    ETEK China
    Why Should You Fit a Type 2 SPD?
    Why Should You Fit a Type 2 SPD?
    YouTube
    The Ultimate Protection: Type 2 40kA Surge Protector - LSP
    The Ultimate Protection: Type 2 40kA Surge Protector - LSP
    LSP
    All images
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    People also ask
    What is a Type 2 SPD rating?
    The Type 2 SPD is the main protection system for all low voltage electrical installations. Installed in each electrical switchboard, it prevents the spread of overvoltages in the electrical installations and protects the loads. Type 2 SPD is characterised by an 8/20µs current wave.

    BEAMA Guide to Surge Protection Devices (SPDs)


    BEAMA
    https://www.beama.org.uk › static › uploaded
    BEAMA
    https://www.beama.org.uk › static › uploaded
    What is a Type 2 surge protector SPD?
    An error has occurred. Please try again later.
    What is the difference between Type 1 and Type 2 SPD?
    An error has occurred. Please try again later.

    Ask anything in AI Mode

    Explain what causes voltage surges
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    Web results

    Surge-Trap® Pluggable STPT2 Series - 40kA


    Mersen
    https://www.mersen.com › ... › Surge Protection
    Mersen
    https://www.mersen.com › ... › Surge Protection
    STP T2 40 is the series of Type 2/Class II devices for discharging voltage surges, in accordance with EN/IEC 61643-11.Read more

    Surge Protective Arrester Device Rail Installation 2P DC ...


    Amazon.com
    https://www.amazon.com › Protective-Installation-Phot...
    Amazon.com
    https://www.amazon.com › Protective-Installation-Phot...
    DC SPD Surge Protector for 100V-1000V PV Systems, 2-Pole 40kA T2 Level, Replaceable Module ...Read more
    30-day returns

    Surge Protection Device, Type 2, 20/40/60/80kA


    ATO.com
    https://www.ato.com › ... › Surge Protection Devices
    ATO.com
    https://www.ato.com › ... › Surge Protection Devices
    With max. discharge current of 20kA / 40kA / 60kA / 80kA, the SPD is designed in accordance with IEC Class II, reliable performance and low price.Read more
    $62.63 · In stock · 5.0(2) · Free delivery · 30-day returns

    The Ultimate Protection: Type 2 40kA Surge Protector - LSP


    lsp.global
    https://lsp.global › the-ultimate-protection-type-2-40ka-s...
    lsp.global
    https://lsp.global › the-ultimate-protection-type-2-40ka-s...
    Jul 3, 2025 — A 40kA Surge Protector is a tool that guards electrical systems. It protects them from sudden voltage increases, often caused by lightning or power changes.Read more
  • What is the kA Rating of a...
  • Where Is a 40kA SPD Typically...

    • JLSP type 2 single phase surge arrester 2 Poles 40kA DC ...


    eBay
    https://www.ebay.com › itm
    eBay
    https://www.ebay.com › itm
    Brand new item as described in plastic package. Highly recommended! JLSP din rail mounted AC surge protector 2 poles surge protection device 275V (#305567533627).Read more
    $25.98 · In stock · $7.95 delivery

    Type 2 Surge Protective Devices | Warshauer Electric


    spd-depot.com
    https://www.spd-depot.com › catalog › shop › Type-2-...
    spd-depot.com
    https://www.spd-depot.com › catalog › shop › Type-2-...
    Type 2 Surge Protective Panels are mounted to the load side of an electric service panel and protect against residual external power disturbances.Read more
    Missing: 40ka ‎| Show results with: 40ka

    Surge Protection Device, Domae, 3P+N, T2, 40 kA


    Schneider Electric
    https://www.se.com › ... › Domae SPD
    Schneider Electric
    https://www.se.com › ... › Domae SPD
    Specifications ; [Imax] maximum discharge current, 40 kA ; [Uc] maximum continuous operating voltage, Common mode: 340 V L/PE Common mode: 260 V N/PE Differential ...Read more

    Surge Protective Devices SPD T2


    ABB
    https://new.abb.com › ... › Surge Protective Devices
    ABB
    https://new.abb.com › ... › Surge Protective Devices
    Type 2 tested surge protective devices are usually used as the second protection stage in sub-distribution boards or in final circuits to protect equipment ...Read more

    275v type 2 40ka ac power surge protective device spd


    Anhui Jinli Electric Tech. Co., Ltd
    https://www.jinlispd.com › 275v-type-2-40ka-ac-power...
    Anhui Jinli Electric Tech. Co., Ltd
    https://www.jinlispd.com › 275v-type-2-40ka-ac-power...
    AC power surge protective device is used in AC power supply system (50/60Hz) and low-voltage control system to protect from lightning striker and transient ...Read more
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    Videos
    SPD Type 2 vs Type 3: Most Electricians Get This Wrong
    YouTube · eFIXX
    1 month ago
    YouTube · eFIXX
    7:24
    Distance affects voltage seen by equipment during surge events; if equipment is >10m from upstream SPD, consider coordinated protection.
    eFIXX
    YouTube·
    Mar 31, 2026

    SPD Type 2 vs Type 3: Most Electricians Get This Wrong

    YouTube·eFIXX·Mar 31, 2026
    YouTube
    In this video
    • 00:00
      What SPD should you install?
    • 00:22
      Common SPD debates explained
    • 00:50
      Upstream vs downstream (simple explanation)
    • 01:35
      What an SPD actually does
    • 02:20
      Voltage protection level (Up) explained
    • 03:00
      Type 2 vs Type 3 SPDs
    • 03:50
      Combined SPDs and coordination
    • 04:40
      The 10 metre rule explained
    • 05:20
      What causes voltage rise in cables
    • 06:00
      Real-world sub-board example
    • 06:50
      So what should you install?
    • 07:10
      Final thoughts and takeaway
    Type 2 SPD and How do Surge Protection Devices Work​
    YouTube · Surge Protective Device - LSP
    Jul 23, 2025
    YouTube · Surge Protective Device - LSP
    1:53
    A type 2 surge protector is installed at the service entrance or near devices and uses high energy and GDTS with a unique disconnection mechanism.
    Surge Protective Device - LSP
    YouTube·
    Jul 23, 2025

    Type 2 SPD and How do Surge Protection Devices Work​

    YouTube·Surge Protective Device - LSP·Jul 23, 2025
    YouTube
    In this video
    • 00:00
      Why installing a Type 2 Surge Protection Device
    • 00:16
      Type 2 Surge Protective Device installation location and specifications
    • 00:22
      When Type 2 Surge Protector needs to be replaced
    • 00:30
      Type 2 Surge Protector internal structure
    • 00:35
      Unique disconnection mechanism
    • 00:46
      Mis-insertion prevention design
    • 00:54
      Safe creepage and clearance distances
    • 00:58
      Remote signaling functionality
    • 01:01
      Reinforced metal parts
    • 01:16
      Type 2 Surge Protection Device working principle
    • 01:34
      A Type 2 Surge Protector is a smart investment, crucial for keeping sensitive electronics safe and maintaining a stable, secure electrical system.
    Surge Protection Device SPD Type 1 vs Type 2 vs Type 3
    YouTube · Surge Protective Device - LSP
    Oct 19, 2025
    YouTube · Surge Protective Device - LSP
    6:37
    Type 1 SPDs are installed at the main service entrance to handle high energy surges from direct lightning strikes, using a 10/350 waveform.
    Surge Protective Device - LSP
    YouTube·
    Oct 20, 2025

    Surge Protection Device SPD Type 1 vs Type 2 vs Type 3

    YouTube·Surge Protective Device - LSP·Oct 20, 2025
    YouTube
    In this video
    • 00:00
      What is a surge protective device (SPD)
    • 00:13
      Types of surge protection devices
    • 00:26
      SPD Type 1 vs Type 2 vs Type 3
    • 00:38
      Type 1 surge protector overview
    • 00:54
      10/350 µs waveform (Type 1 SPD)
    • 01:51
      Type 1 surge protection device impulse current capacity: I(imp) 25kA to 100kA
    • 02:01
      Installation: Type 1 SPD at main electrical panel
    • 02:20
      Introduction to Type 2 surge protection device
    • 02:37
      8/20 µs waveform (Type 2 SPD)
    • 03:18
      Type 2 surge protector current capacity: I(n) / I(max) 20kA to 75kA
    • 03:29
      Installation: Type 2 SPD at sub-panels
    • 03:55
      Overview of Type 3 surge protector
    • 04:23
      1.2/50 µs waveform (Type 3 SPD)
    • 05:06
      Type 3 surge protection device voltage protection: U(oc) 6kV to 20kV
    • 05:17
      Installation: Type 3 SPD in front of TVs, computers, and other sensitive electronic equipment
    • 05:56
      Use cascading surge protection Type 1, Type 2 and/or Type 3
    • 06:32
      LSP - Reliability in surge protection
    View all
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