Description:

The DEHNguard IT 440 is a professional-grade Type 2 Surge Protective Device (SPD) designed to protect electrical installations and sensitive equipment from transient overvoltages. Manufactured by DEHN, this modular surge arrester delivers reliable performance and high discharge capacity for industrial and technical power systems.

Configured in L+ / PE / L− topology, the device ensures comprehensive pole protection and is ideal for distribution boards where complete surge suppression is required. Its compact modular construction with replaceable cartridges and integrated visual status indicator allows fast maintenance and reduced downtime.

Designed for DIN rail installation, the DEHNguard IT 440 is suitable for industrial panels, automation systems, and energy distribution environments requiring dependable surge protection.

🛠 Warranty: 12 months by Green Energy

⚙️ Technical Details:

Brand: DEHN
Series: DEHNguard
Model: IT 440
Part No.: 900 675
SPD Type: Type 2 (T2)
Nominal Voltage: 440 V AC
Max Continuous Voltage (Uc): 440 V~
Nominal Discharge Current (In): 20 kA
Maximum Discharge Current (Imax): 40 kA
Voltage Protection Level (Up): ≤ 2 kV
Configuration: L+ / PE / L−
Status Indicator: Green = OK / Red = Replace
Cartridges: Replaceable modules
Mounting: DIN rail

📌 Key Functions:

✔️ Type 2 surge protection for AC systems
✔️ High discharge capacity up to 40 kA
✔️ Full-pole protection configuration
✔️ Modular replaceable cartridges
✔️ Integrated visual status indicator
✔️ Compact industrial design
✔️ Reliable DEHN professional protection technology

🛠 Applications:

✔️ Industrial electrical panels
✔️ Power distribution systems
✔️ Technical installations and automation systems
✔️ Protection of electronic equipment
✔️ 440 V AC electrical infrastructures

⚡ Operating Principle:

When a transient overvoltage occurs:

• The SPD intercepts the voltage spike.

• Excess energy is safely diverted to earth.

• Residual voltage is limited to ≤ 2 kV, protecting downstream devices.

When a protection module reaches end of life, the indicator changes from green to red, signaling the need for replacement.

🚀 Reliable professional surge protection for industrial electrical systems — engineered in Germany and tested by Green Energy.