Phoenix VAL-SEC-T2-3S-350 TN-S Type 2 Surge Arrester 3-Phase+N 350V AC 40kA DIN Rail

The Phoenix VAL-SEC-T2-3S-350 stands apart from generic surge arresters by combining a robust 3-phase + neutral (TN-S) configuration with a high 40 kA maximum discharge capacity and a low voltage protection level of ≤1.5 kV. This Type 2 device is engineered for main distribution boards where reliable protection of sensitive electronics against transient overvoltages is non-negotiable. Its floating changeover contact enables remote monitoring, making it a practical choice for industrial and commercial installations that demand both performance and oversight.

Highlights

• Type 2 surge protection per IEC/EN 61643-11 for TN-S systems
• Nominal discharge current (In) of 20 kA, maximum discharge current (Imax) of 40 kA (8/20 µs)
• Voltage protection level (Up) ≤ 1.5 kV for effective equipment safeguarding
• Fast response time ≤ 25 ns to clamp surges almost instantly
• Optical status indication (green/red) and remote signaling via floating changeover contact
• DIN rail mounting with screw connections for solid or flexible conductors up to 35 mm² / 25 mm²
• Wide operating temperature range from -40 °C to 80 °C

In daily use

Installed on a standard 35 mm DIN rail, this surge arrester integrates seamlessly into distribution panels. The screw terminals accept large conductor cross-sections, reducing installation effort and ensuring secure connections even in high-current paths. The clear optical indicator allows quick visual checks, while the remote signaling contact can be wired to a building management system for centralized monitoring. With its IP20 housing and durable PA 6.6-FR material, it is suited for indoor electrical enclosures where space and reliability matter.

Full specifications

• SPD Type: Type 2
• Network Configuration: TN-S
• Number of Poles: 3-Phase + N (3+1)
• Nominal Voltage (UN): 230 V AC (L-N) / 400 V AC (L-L)
• Max. Continuous Operating Voltage (UC): 350 V AC (L-N/L-PE)
• Nominal Discharge Current (In): 20 kA (8/20 µs)
• Max. Discharge Current (Imax): 40 kA (8/20 µs)
• Voltage Protection Level (Up): ≤ 1.5 kV
• Response Time (tA): ≤ 25 ns
• Mounting Type: DIN Rail
• Connection Type: Screw Connection
• Max. Conductor Cross Section (Solid): 35 mm²
• Max. Conductor Cross Section (Flexible): 25 mm²
• Degree of Protection: IP20
• Operating Temperature Range: -40 °C to 80 °C
• Status Indication: Optical (Green/Red)
• Remote Signaling: Yes (Floating Changeover Contact)
• Test Standard: IEC 61643-11 / EN 61643-11
• Housing Material: PA 6.6-FR 20% GF

Final note

For dependable surge protection in TN-S power distribution systems, the Phoenix VAL-SEC-T2-3S-350 delivers high discharge capacity, low protection level, and remote monitoring capability in a compact DIN rail module.