Prepäťová ochrana 4P 12,5kA (10/350) trieda T1+T2 (B+C) SCHELINGER

The SCHELINGER A51-SPD03-4P-B+C is a high-performance combined Type 1 + Type 2 surge protective device (SPD) designed for protection against direct and indirect lightning strikes. With a 4-pole configuration and an impulse current of 12.5 kA (10/350 µs) per pole, it provides robust protection for electrical installations in residential, commercial, and industrial buildings. This Class B+C arrester meets IEC 61643-11 standards and features a metal oxide varistor (MOV) technology with a thermal disconnector for safe operation.

Advantages

Combined Type 1 + Type 2 protection in a single device saves space and installation cost. High impulse current handling (12.5 kA) ensures reliable protection against direct lightning surges. Visual status indicator (green/red) allows easy monitoring of device health. DIN rail mounting simplifies installation in distribution boards.

Suitable for

• Main distribution boards in buildings requiring lightning protection
• Industrial and commercial electrical systems
• Residential installations with external lightning protection
• Telecommunications and data centers

Key specifications

• Type: Combined Type 1 + Type 2 (Class B+C)
• Number of Poles: 4P
• Rated Voltage (Un): 230/400 V AC
• Maximum Continuous Operating Voltage (Uc): 275 V AC
• Nominal Discharge Current (In): 20 kA (8/20 µs) per pole
• Impulse Current (Iimp): 12.5 kA (10/350 µs) per pole
• Maximum Discharge Current (Imax): 40 kA (8/20 µs) per pole
• Voltage Protection Level (Up): < 1.5 kV
• Response Time: < 25 ns
• Mounting: DIN Rail (35 mm)
• Degree of Protection: IP20
• Operating Temperature: -40°C to +80°C
• Standards: IEC 61643-11
• Short-circuit Withstand Capability (Isccr): 50 kA
• Connection Cable Cross-section: 6-35 mm² (flexible/rigid)
• Housing Material: Thermoplastic, flame retardant

Recommendations

For optimal protection, install this SPD at the main distribution board as close as possible to the service entrance. Ensure proper grounding and bonding according to local electrical codes. Regularly check the visual indicator; if red, replace the module immediately.