Surge Protection for Radiocom site DS252C-48DC/G 1-pole Type 1 and Type 2 SPD for 48 Vdc PRC1800-716/MF 'Quarter wave' coaxial protector DS230-48DC DC power surge protector - 48 Vdc DS254VG-300/G Type 1+2+3 AC surge protector - 3-phase+N DLA-24D3 1-pair DIN rail plug-in Data surge protector OR OR DAC1-13-31-275 Type 1+2 AC surge protector - 3-phase+N OBSTA