128 features applications quick response for surge. high impulse current capacity. it can withstand alternating current. excellent insulation resistance and small capacitance. recommendation of itu-t conformity. telephone, pbx, wireless base station, optical transmission equipments, catv transmission equipments, fire alarm systems and home security systems. dimensions unit: mm ul :ul497b :ul1449 e139599 e332107 safety standard file no. 25min. 25min. 1.0 +0.2 -0.1 8.00.25 a0.2 model number r28- ? ? ? -bhl r28- ? ? ? -bjl r28- ? ? ? -bkl a 5.7 6.05 7.5 electrical specifications (high voltage type) r28-801-bhl r28-102-bhl r28-152-bhl r28-242-bjl r28-302-bkl r28-362-bkl r28-402-bkl r28-452-bkl 800v20% 1,000v20% 1,500v20% 2,400v20% 3,000v20% 3,600v20% 4,000v20% 4,500v20% model number - ac1,250v 3s ac1,500v 60s ac1,800v 3s ac2,000v 60s (conforms to itu-t) dc sparkover voltage 500v/s (v) impulse discharge current 8/20 s (a) 10,000 impulse life test 8/20 s 1,000a (times) 300 10 4 1.5 insulation resistance min. (m ) capacitance max. (pf) withstand voltage test electrical specifications (low voltage type) 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 90v20% 150v20% 230v20% 250v20% 300v20% 350v20% 400v20% 470v20% 600v20% 450 500 600 650 750 800 900 1,300 model number dc sparkover voltage 100v/s~2,000v/s (v) safety standard impulse sparkover voltage 100v/ s (v) impulse discharge current 8/20ms (a) 10,000 alternating discharge current 50hz, 1s 10 times (a) 10 impulse life test 10/1,000 s 100a (times) 300 10 4 1.5 capacitance max. (pf) insulation resistance min. (m ) - - - - ul 497b ul 1449 safety standard ul 1449 r28 series surge protective devices length type of wire model numbering system r28 5 31 h bl series name dc sparkover voltage type of taping 351 35x101=350v h j k o 5.7mm 6.05mm 7.5mm 10.0mm b bulk l none with lead without lead r28 r38 2 electrode arrester 3 electrode arrester { { { { { { { { * 1 * 2 * 1 * 2 * 1 * 2 * 1 * 2 * 1 * 2 * 1 * 2 * 1 * 2 * 1 * 2 { { { { { * 1 * 1 * 1 * 1 * 1 * 2 *1 rated voltage ac125v: approved if it is connected to ul approved varistor (v1.0ma 270v, d ? 14mm). *2 rated voltage ac250v: approved if it is connected to ul approved varistor (v1.0ma 470v, d ? 14mm).
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