| Electrical characteristics | | | | |
| Max. continuous operating voltage (DC) | 550V | | 1000V | |
| Nominal discharge current (8/20) | 20kA per pole | 20kA per pole | 20kA per pole | 20kA per pole |
| Max. discharge current (8/20) | 40kA per pole | 40kA per pole | 40kA per pole | 40kA per pole |
| Impulse current (10/350) | 12.5kA per pole | 12.5kA per pole | 12.5kA per pole | 12.5kA per pole |
| Specific energy | 39kJ/Ω | 39kJ/Ω | 39kJ/Ω | 39kJ/Ω |
| Charge | 6.25As | 6.25As | 6.25As | 6.25As |
| Protection level | < 1.75kV | | < 2.6kV | < 2.6kV |
| Residual voltage at Iimp | < 1.45kV | | < 2.2kV | < 2.2kV |
| Follow current | NO | NO | NO | NO |
| Response time | < 25ns | < 25ns | < 25ns | < 25ns |
| Thermal protection | YES | YES | YES | YES |
| Mechanical characteristics | | | | |
| Temperature range | - 40˚C ….+ 80˚C | - 40oC ….+ 80oC | - 40oC ….+ 80oC | - 40oC ….+ 80oC |
| Terminal screw torque | max. 4.5Nm | max. 4.5Nm | max. 4.5Nm | max. 4.5Nm |
| Terminal cross section | 35mm² (solid)/25mm² (stranded) | 35MK18 (solid)/25MK18 (stranded) | 35ML18 (solid)/25ML18 (stranded) | 35mm18 (solid)/25mm18 (stranded) |
| Mounting EN 60715 | 35mm top-hat rail | 35mm top-hat rail | 35mm top-hat rail | 35mm top-hat rail |
| Degree of protection | IP 20 | IP 20 | IP 20 | IP 20 |
| Housing material | Thermoplastic; extinguishing degree UL 94 V-0 | Thermoplastic; extinguishing degree UL 94 V-0 | Thermoplastic; extinguishing degree UL 94 V-0 | Thermoplastic; extinguishing degree UL 94 V-0 |
| Dimensions DIN 43880 | 4TE | 4TE | 4TE | 4TE |
| Weight per unit | 370g | 370g | 578g | 578g |
| Ordering code PV PROTEC BS 12.5/xxxx | 501 507 | 501 507 | 501 541 | 501 541 |
| Remote contacts | YES | YES | YES | YES |
| Contact ratings | AC: 250V/0.5A; 125V/3A | AC: 250V/0.5A; 125V/3A | AC: 250V/0.5A; 125V/3A | AC: 250V/0.5A; 125V/3A |
| Terminal cross section | max. 1.5mm² | max. 1.5MK27 | max. 1.5ML27 | max. 1.5mm27 |
| Remote terminal torque | 0.25Nm | 0.25Nm | 0.25Nm | 0.25Nm |
| Weight per unit | 375g | 375g | 583g | 583g |
