R28SERIES GAS DISCHARGE TUBE R28 Series ・Quick response for surge ・High surge current capacity ・It canwithstand alternating current. ・Excellent insulation resistance and small capacitance. ・Recommendation of ITU-T conformity. ・Applications ・Home telephone, Business telephone, PBX ・Wireless base station ・Optical transmission equipments ・CATV transmission equipment, Broadcasting equipments ・Fire alarm system, Home security systems ●R28(2-Electrode Arresters) Test Model R28-900-BHL R28-151-BHL R28-231-BHL R28-251-BHL R28-301-BHL R28-351-BHL R28-401-BHL R28-471-BHL R28-601-BHL DC spark-over Voltage 100V/s∼ 500V/s (V) 90V±20％ 150V±20％ 230V±20％ 250V±20％ 300V±20％ 350V±20％ 400V±20％ 470V±20％ 600V±20％ Impulse spark-over Voltage 100V/μs Max. (V) 450 500 550 600 650 650 700 900 1300 Impulse discharge current 8/20μs (kA) Alternating discharge current 50Hz,/1sec. 10Times (A) 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Impulse life test Insulation resistance 10/1000μs 100A (Times) 300 300 300 300 300 300 300 300 300 Min. Capacitance Max. (pF) (MΩ) 104 104 104 104 104 104 104 104 104 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 ●R28(2-Electrode Arresters)High-Voltage Types Test Model R28-801-BHL R28-102-BHL R28-152-BHL R28-242-BJL R28-302-BKL R28-362-BKL R28-402-BKL R28-452-BKL DC spark-over Voltage 500V/s (V) 800V±20％ 1000V±20％ 1500V±20％ 2400V±20％ 3000V±20％ 3600V±20％ 4000V±20％ 4500V±20％ Impulse discharge current 8/20μs (kA) 10 10 10 10 10 10 10 10 Insulation resistance Min. (MΩ) Impulse life test 8/20μs 100A (Times) 300 300 300 300 300 300 300 300 104 104 104 104 104 104 104 104 Capacitance Max. Withstand Voltage Test (pF) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 − − − AC1250V 3sec. AC1500V 60sec. AC1800V 3sec. AC2000V 60sec. AC2000V 60sec. Dim : mm Model R28-□□□-BHL R28-□□□-BJL R28-□□□-BKL 74 A 5.7 6.45 7.9 R38SERIES GAS DISCHARGE TUBE ●R38(3-Electrode Arresters) Test Model Impulse spark-over Voltage 100V/μs Max.(V) 450 550 600 650 900 1300 Impulse discharge current 8/20μs Alternating discharge current 50Hz,/1sec. 10Times (A) 10 10 10 10 10 10 (kA) 10 10 10 10 10 10 Impulse life test Insulation resistance 10/1000μs 100A(Times) Min. Capacitance Max. 300 300 300 300 300 300 (pF) (MΩ) 104 104 104 104 104 104 1.5 1.5 1.5 1.5 1.5 1.5 SURGE ABSORBERS R38-900-BOL R38-231-BOL R38-261-BOL R38-351-BOL R38-421-BOL R38-601-BOL DC spark-over Voltage 100V/s∼ 500V/s (V) 90V±20％ 230V±20％ 260V±20％ 350V±20％ 420V±20％ 600V±20％ Type designation 10/200μs，20kV Surge Wave form 10kV/div R28−351−B H L Type of wire L：With wire R28-900-BHL Break down Voltage 900V 0.5kV/div None：Without wire Length H：5.7mm 10μs/div J：6.45mm 1.2/50μs，20kV Surge Wave form K：7.9mm O：10.0mm 10kV/div Type of taping A：with taping B：without taping(bulk) 0.5kV/div DC spark-over Vbltage 351：35×101＝350V Series name 75 R28-231-BHL Break down Voltage 700V 1.0μs/div