LT-40 Type 2 Surge Protector 40kA AC Distribution
Type 2 surge protection devices are used for power distribution boards, which eliminate surge power to the ground and reduce voltage on outgoing devices. Leitai Electric is a company based in China, which has its own manufacturing unit and produce various surge protective devices. The company offers OEM, wholesale and distribution services all over the world.
Applications & circuit protection
Applied in AC distribution boards, incoming panels and electrical rooms, the LT-40 provides 20kA/40kA Type 2 protection. It is popular for installation in the following locations:
- Incoming panels: Protection of high current supply.
- Distribution boards: Type 2 protection at main distribution.
- Industrial installations: Machine and process line protection.
- Data centres: Equipment power protection.
Schematic Diagram
Above is the schematic diagram of internal protection circuit and design of LT-40 surge protective device.
Construction & operating reliability
The LT-40 uses high-energy MOV technology along with internal thermal disconnection to achieve high performance, reliability, and long-lasting use. The company employs dedicated production lines and control of quality at all stages of manufacturing process to ensure the output of the surge protector is consistent and traceable.Its features include：
- high-energy MOV for fast response,
- thermal disconnector with visual indicator of failure,
- IP20 enclosure, UL94 V0 flame retardant.
- Certified under the requirements of IEC 61643-11 / GB/T 18802.11
Type 2 Surge Protector Specifications & Technical Data
| Technical Data | Value |
|---|---|
| Uc | 275V |
| Un | 220V |
| In | 20kA |
| Imax | 40kA |
| Up | 1.2kV |
Type 2 Surge Protector for Sale: Factory Pricing & Sales Support
The LT-40 price is taken from our factory price list which depends on the configuration and a quantity of a certain order. You should call our export department for a written price offer with the volume pricing especially for distributors and project buyers.
- Standard pricing according to the factory price list
- Custom configurations and volume pricing
- Written quotation according to your requirements
How to Install and Connect Type 2 Surge Protector
The LT-40 SPD is connected parallel to the line that needs protection. The earth cable connects it to the PE terminal. The wires connecting the device should be as short as possible to limit residual voltage. For TN systems connect L, N, and PE according to the connection diagram provided.
- Parallel connection with short wires to the PE terminal
- External disconnector suitable for other applications
- Connecting diagram provided in the product documentation
Wiring Diagram
In the above diagram, you can see how the LT-40 is suggested to be connected to a typical distribution board, the wiring of which is consistent with standard practice where both L, N and PE terminals are clearly marked.
How Does Type 2 Surge Protector Compare to Alternative Protection?
When you’re comparing surge protection devices, pay attention to the following aspects: protection level (Up), discharge capacity (In/Imax or Iimp), as well as a relevant standard. Our specialists would be happy to provide you with the right configuration.
| Feature | This SPD | Alternative |
| Type | Type 2 (T2) SPD | Other SPD types available |
| Discharge capacity | 20kA / 40kA | Matched to network duty |
| Protection level | 1.2kV | Lower Up options available |
| Application | AC Distribution | Other installation types |
Export Markets & Country Compatibility
Leitai surge protective devices are supplied to projects in more than 40 countries of the world with local certification and documentation.
SPD Dimensions, Weight & Packing
The LT-40 makes use of a standard modular enclosure for the purpose of 35mm DIN rail mounting. The weight and size can change according to the configuration; dimension drawings can be found in the appropriate datasheet.
- Slim DIN-system profile for panel mounting
- Protection of terminals during transit
- Dimension drawing provided by model
Dimensional Drawing
The drawing above demonstrates the structural outline of the device LT-40, which fits the DIN rail and aids design planning.
Standards & certifications
The LT-40 surge protective equipment complies with IEC 61643-11 and GB/T 18802.11 regulations. Type test and routine test documentation can be issued according to the requirements of a project and specific jurisdiction.
- Design standard: IEC 61643-11/GB/T 18802.11.
- Certification: TUV, CE, CQC (depending on a particular design).
- Terminal and polarity markings as per standard practice.
- Works with the DIN rail design for switching equipment.
OEM & B2B supply support
Original Equipment Manufacturer, wholesale, and distributing programs for Surge Protective Devices (SPDs) with custom marking, branding, and packaging options.
If the LT-40 version is not suitable, please provide us with the appropriate type needed, along with discharge capacity, voltage, and quantity. Our export sales staff will support your inquiry with product selection, technical specifications, and commercial conditions.
- Product samples available for evaluation.
- Ability to deliver the desired quantity for projects and B2B purchases.
- OEM and ODM support is also available.
- Various options for marking, branding, and packaging.
- There is technical documentation and certification support available.
Type 2 Surge Protector Buyer FAQ: What You Need to Know
Does the LT-40 have a failure indicator?
Indeed, the LT-40 features a visual end-of-life indication as well as an internal thermal disconnector.
Where should the LT-40 be installed?
LT-40 should be installed on the DIN rail of the switchboard, main or sub-distribution, located as close as possible to the incoming power supply and at the minimal distance to the ground.
Which earthing systems does it support?
The LT-40 can operate with erthing systems like TN, TT, IT depending on the setting of the protection mode (L-N, L-PE, N-PE).
What do In and Imax mean?
In is the nominal discharge current (8/20us), while Imax stands for maximum discharge current once SPD can endure.
What is a Type 2 SPD used for?
Type 2 SPD is used to protect low voltage boards and the equipment connected to them fro switching and induced lightening transients.
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