SCHELINGER A51-SPD01-1P-B+C Type 1+2 Surge Protective Device 1-Pole 5kA (10/350) Class B+C

Type 1+2 surge protective device engineered for primary and secondary protection in low-voltage power distribution systems. Its 5 kA impulse current handling (10/350 µs waveform) safely diverts direct lightning partial currents, while the 1-pole modular design fits standard 35mm DIN rails for fast installation.

Advantages

Combines Class I and Class II protection in a single 18mm-wide module, reducing panel space and wiring complexity. The visual status flag provides immediate indication of protection readiness, and the <25 ns response time ensures sensitive downstream equipment is shielded from fast transient overvoltages. With a 50 kA short-circuit withstand rating and up to 125A gG backup fuse compatibility, it integrates reliably into demanding electrical installations.

Suitable for

• Main distribution boards and sub-distribution panels in residential, commercial, and industrial buildings
• Protection of electrical installations at the boundary between lightning protection zones LPZ 0–1 and LPZ 1–2
• Applications requiring compliance with IEC/EN 61643-11 for surge protective devices
• Systems with 230V AC nominal voltage and 275V AC maximum continuous operating voltage

Key specifications

• SPD type: Type 1 + Type 2 (T1+T2), Class I + Class II (B+C)
• Number of poles: 1 (1P)
• Impulse current (Iimp): 5 kA (10/350 µs)
• Nominal discharge current (In): 20 kA (8/20 µs)
• Maximum discharge current (Imax): 40 kA (8/20 µs)
• Voltage protection level (Up): ≤ 1.5 kV
• Response time: < 25 ns
• Short-circuit withstand capability (Icc): 50 kA
• Mounting: 35mm DIN rail
• Module width: 1 module (18mm)
• Status indication: visual flag (green/red)
• Operating temperature range: -40°C to +80°C
• Degree of protection: IP20
• Standards compliance: IEC/EN 61643-11
• Max. backup fuse: 125A gG

Recommendations

Install this SPD at the main distribution board to protect against direct lightning strikes and switching overvoltages. Verify the visual flag periodically to ensure protection is active.