ABB OVRZP+3N12.5-255MCB6 Combined Surge Protective Device Type 1+2, 3P+N, 255 V, 12.5 kA, with Integrated MCB 2CTB815799R3100

In industrial facilities and commercial buildings, the ABB OVRZP+3N12.5-255MCB6 safeguards three-phase power distribution systems against lightning strikes and switching surges. This combined Type 1+2 surge protective device (SPD) is engineered for DIN rail mounting and integrates a 6 A miniature circuit breaker (MCB) for backup protection, ensuring continuous operation of critical equipment.

Key specifications

• Type: Combined SPD Type 1+2
• Number of poles: 3P+N (3-phase + Neutral)
• Maximum continuous operating voltage (Uc): 255 V AC
• Nominal discharge current (In): 20 kA (8/20 µs)
• Impulse current (Iimp): 12.5 kA (10/350 µs) per pole
• Voltage protection level (Up): < 1.5 kV
• Short-circuit withstand capability (Isccr): 50 kA
• Integrated backup protection: 6 A MCB (C-curve)
• Mounting: DIN rail 35 mm
• Degree of protection: IP20
• Operating temperature: -25 to +60 °C
• Remote signaling: Yes (auxiliary contact)
• Protection technology: Varistor
• Number of modules: 6 (width 108 mm)
• Rated frequency: 50/60 Hz
• Housing material: Thermoplastic, UL 94 V-0

Why choose it

The integrated MCB eliminates the need for separate backup fusing, simplifying installation and reducing panel space. The device meets IEC 61643-11 and EN 61643-11 standards, providing reliable protection for low-voltage power distribution systems. Its remote signaling contact enables monitoring of device status, enhancing maintenance efficiency.

Ideal use cases

• Main distribution boards in industrial plants
• Commercial building power entry points
• Protection of sensitive three-phase equipment
• Upgrading existing surge protection to Type 1+2

Good to know

The thermoplastic housing with UL 94 V-0 flammability rating ensures safety in electrical installations. The device is designed for indoor use (IP20) and operates across a wide temperature range from -25 °C to +60 °C.