# BR-40 2P Type 2 40kA Surge Protective Device for TNS Systems
## Introduction to Surge Protection in TNS Systems
The BR-40 2P Type 2 40kA Surge Protective Device (SPD) is specifically designed to protect electrical installations in TNS (Terre-Neutre-Séparé) systems from transient overvoltages. These systems, commonly used in residential and commercial buildings, require robust protection against lightning strikes and switching surges that can damage sensitive electronic equipment.
## Key Features of the BR-40 SPD
High Performance Protection
The BR-40 offers a nominal discharge current (In) of 20kA per pole and a maximum discharge current (Imax) of 40kA, providing excellent protection against powerful electrical surges.
Compact 2-Pole Design
With its space-saving 2-pole configuration, this SPD is ideal for installation in distribution boards where space is often limited.
Visual Status Indication
The device features clear visual indicators that show the operational status and warn when replacement is needed.
## Technical Specifications
| Parameter | Value |
|---|---|
| Type | Type 2 SPD |
| Nominal Discharge Current (In) | 20kA (10/350μs) |
| Maximum Discharge Current (Imax) | 40kA (8/20μs) |
| Voltage Protection Level (Up) | ≤ 1.5kV |
| Operating Voltage (Uc) | 230/400V AC |
## Installation and Applications
Simple Installation
The BR-40 is designed for easy DIN rail mounting in distribution boards, requiring minimal installation time and expertise.
Ideal Applications
- Residential buildings with TNS earthing systems
- Commercial and industrial facilities
- Data centers and telecommunications equipment
- Medical facilities with sensitive equipment
## Why Choose the BR-40 for TNS Systems?
The BR-40 2P Type 2 SPD offers optimal protection for TNS systems by:
- Providing high surge current handling capacity
- Maintaining low let-through voltage to protect downstream equipment
- Offering reliable performance with minimal maintenance requirements
- Complying with relevant international standards (IEC 61643-11)
For comprehensive protection of your electrical installation in a TNS system, the BR-40 represents an excellent balance of performance, reliability, and value.
