72BL

72B, 72BL Series Part No. Nominal dc spark-over voltage Vsdc (V) 72B75/L 72B90/L 72B150/L 72B230/L 72B250/L 72B300/L 72B350/L 72B400/L 72B420/L 72B470/L 72B600/L 75 90 150 230 250 300 350 400 420 470 600 Gas Discharge Tube dc spark-over voltage Vsdc (V) 60~90 72~108 120~180 184~276 200~300 240~360 280~420 320~480 336~504 376~564 480~720 Impulse spark-over voltage at 1kV/μ s Vsi (V) ≦700 ≦700 ≦700 ≦800 ≦800 ≦900 ≦900 ≦1000 ≦1100 ≦1100 ≦1500 10 100 10 Nominal Nominal impulse impulse discharge discharge current current 8/20μ s 10/1000μ s idi idi (KA) (A) Nominal Alternating discharge current at 50Hz, 1s ida (A) Insulation resistance Ris (Ω ) Capacitance at 1kHz C (pF) V (V) 50 50 50 100 100 100 100 100 100 100 150 ≧10 9 ≦3 72BXXX Series 72BXXXL Series Series 72B W3 ψ8.0±0.2 ψ8.0 W4 +0.2 -0.1 L3 1.5±0.1 L4 10.0±0.3 L5 4.25±0.15 Series W3 W4 +0.2 W5 L3 L4 L5 L6 L7 L8 72BL ψ8.0±0.2 ψ8.0 -0.1 15.0±0.5 1.5±0.1 10.0±0.3 4.25±0.15 13.4 -2 4.4±0.3 ψ1.0±0.1