The STP T12 40 5Y2PVM surge arresters are a group of devices for installation in standard electrical distribution boards, dedicated for use with photovoltaic installations on the DC supply side. These five-pole surge arresters are specifically designed for PV systems with two MPPTs for DC voltages up to 1000 V and for combining multiple strings.

The task of the STP 5Y2PVM Type 1+2/Class I+II, 5-pole surge arresters is to protect against the effects of direct lightning currents (10/350μs) and induced transient overvoltages (8/20μs). Fully compliant with IEC 61643-31 and EN 50539-11 standards.

The STP T12 40 5Y2PVM surge arresters use a thermodynamic disconnection system, eliminating the need for additional backup fuses thanks to their high resistance to short-circuit currents. DIN rail mounting. Ideal for building complex photovoltaic systems, especially in buildings equipped with a lightning protection system.

Key product features:

• VDC 1060 V
• Supports up to 2 MPPTs, multiple strings
• Multipole MPPT SPD
• Maximum discharge current (8/20μs): 40 kA
• Nominal discharge current (8/20μs): 20 kA
• Ucpv: 65, 80, 660, 1060 Vdc and 1500 Vdc
• Iscpv: 10 kA (EN 50539-11), no backup fuse required
• SCCR: 50–100 kA (UL 1449, 4th edition)
• Remote signalling contact
• DIN rail mounting
• Visual wear indicator
• Reversible housing, allows inverted installation
• Mechanically coded cartridge to avoid replacement errors
• Space-saving design