LT-40N Type 2 Surge Protector 40kA Distribution

LT-40N Type 2 Surge Protector 40kA Distribution

A Type 2 surge protection device for either main distribution or sub-distribution panels, diverting surge currents to the ground and protecting equipment located downstream from high voltage. Leitai Electric is a Chinese supplier of surge protective equipment, featuring manufacturing, testing, and quality assurance capabilities for all types of SPDs.

Applications & circuit protection

The LT-40N can be used in low-voltage distribution systems that are utilized with incoming and sub-distros providing protection of 20kA and 40 kA for supply boards. Its usage is common in the following locations.

• Primary Distribution: Protection against surges for incoming supply.
• Secondary Distribution: Protection for branches of circuit.
• Commercial Building: Protection against circuits of HVAC, socket and lighting.
• Industrial Fedders: Protection against circuits supplying processing center.

Schematic Diagram

The schematic presentation below describes how the internal protective circuit and connection approach of the LT-40N one of the surge protection devices works.

Construction & operating reliability

Using high-energy MOV elements and an internal thermal disconnector, the LT-40N ensures consistent clamping ability and lifetime. Each SPD is assembled, aged, and impulse tested prior to packing, with test results recorded per order for traceability.

• High-energy MOV elements for high-speed operation.
• Thermal disconnector with visual failure indicator.
• IP20 housing, flame-retardant UL94 V0 material.
• Tested as per IEC 61643-11 / GB/T 18802.11.

Type 2 Surge Protector Specifications & Technical Data

Where to Buy Type 2 Surge Protector at Factory Sales Prices

The selling price of the LT-40N comes from our price list based on the configuration and quantity. Please talk to our export team regarding the quotations to obtain the competitive volume pricing for distributors and project customers.

• Standard rates from the price list
• Customized configurations and volume rates to respect the order
• Quotation achieved based on your requirements

Type 2 Surge Protector Connection & Installation Basics

Mount the LT-40N to an area with 35mm DIN rail that is close to the panel or equipment being protected. The SPD will have a parallel connection. Follow the label markings on the housing and the wiring schematic in the product documentation.

• The connection is parallel and involves short connections to the PE terminal.
• External disconnecting device should be specified in the documentation.
• A wiring schematic is provided in the documentation.

Wiring Diagram

According to the connection diagram provided, the suitable wiring of LT-40N in a standard distribution panel is shown including L, N and PE terminals.

Type 2 Surge Protector vs Other Options: Key Differences for Buyers

Choose SPD according to its type, discharging capacity and operating voltage rating. SPD type three and type two safeguard the terminal devices and distribution network respectively while type one discharges the lightning strikes at the source.

Export Markets & Country Compatibility

Leitai’s surge protection devices are exported to more than forty countries with all the required certifications and documents for the each country.

SPD Dimensions, Weight & Packing

The lightweight and small size of LT-40N make it easy to use on DIN rails for control panels. All dimensions and packing information is available in the product data sheets.

• Small size of the product results in convenient usage on a DIN rail mounting.
• The dimmers are packed to protect them during shipment.
• The dimensions of the product are given in its datasheet.

Dimensional Drawing

The dimensional drawing above shows the mounting footprint of the LT-40N for DIN rail installation and panel layout planning.

Standards & certifications

The above diagram illustrates the footprint for the mounting of the LT-40N as well as the design layout for mounting it on a panel.

The LT-40N surge suppressor has been manufactured as per IEC 61643-11 and GB/T 18802.11.

• Type and routine test records can be provided according to your requirements.
• Standard applied: IEC 61643-11 / GB/T 18802.11.
• Certifications: TUV, CE (by model).
• Terminals and polarity are marked as per industry standards.
• Designed for mounting on a rail.

OEM & B2B supply support

Our manufacturing team has been able to provide assistance to distributors and manufacturers, project buyers, and others, spanning from single samples to container loads.

If our LT-40N configuration does not suit your project needs, just send us the necessary type, discharge capacity, voltage, and quantity, and our export team will provide you with a written quote, where delivery time is confirmed with the order.

• Samples are available for evaluation of the product.
• Project quantities can be flexible.
• An OEM and ODM service is provided for products intended for various uses.
• Marking and branding options are provided.
• The company provides all necessary technical documentation and certifications.

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Frequently Asked Questions About Type 2 Surge Protector

Which earthing systems does it support?

The LT-40N can manage TN, TT, and IT systems, depending on the installed protective modes of the device (L-N, L-PE, and N-PE).

What do In and Imax mean?

In is the normal discharge current (8/20us) for the steady state operation; Imax is the maximum discharge current that an SPD can sustain just once.

Does the LT-40N have a failure indicator?

Yes, the striking unit is provided with an obvious end of life indicator and built-in thermal cut-off switch.

What is a Type 2 SPD used for?

Type 2 SPD is designed to safeguard low-voltage distribution cabinets and other downstream appliances against switching and induced lightning surges.

Can I order samples for testing?

Yes. Samples, OEM/ODM support and competitive pricing are available for B2B customers.