rdk8__85xx general purpose rectifier diode powerex, inc., 200 hillis street, youngwood, pa 15697-1800 (724) 925-7272 www.pwrx.com 8500 amperes 3000 volts features: low on-state voltage hermetic ceramic package excellent surge and i 2 t ratings applications: dc power supplies ordering information input rectifiers plating supplies select the complete 12 digit part number using the table below. example: RDK83085XXoo is a 3000v-8500a general purpose diode with a typical reverse recovery time of 35s. part voltage rating voltage code current rating current code reverse recovery lead code v drm -v rrm i tavg t rr rdk8 3000v 30 8500a 85 xx oo 2600v 26 2400v 24 35s typical revised: 9/30/2005 powerex general purpose rectifier diodes are designed with high locking voltage capability and low forward voltage drop to minimize conduction losses. these are packaged in hermetic, ceramic pow-r-disc packages which can be mounted using commercially available clamps and heatsinks or fully assembled to a variety of air or water cooled heat exchangers. page 1
rdk8__85xx general purpose rectifier diode powerex, inc., 200 hillis street, youngwood, pa 15697-1800 (724) 925-7272 www.pwrx.com 8500 amperes 3000 volts absolute maximum ratings characteristic symbol rating units repetitive peak reverse voltage v rrm 3000 volts average on-state current, t c =90c i f(avg.) 8500 a rms on-state current, t c =90c i f(rms) 13352 a average on-state current, t c =55c i f(avg.) 10000 a rms on-state current, t c =55c i f(rms) 15708 a peak one cycle surge current, 60hz, v r =v rrm i fsm 100,000 a fuse coordination i 2 t, 60hz i 2 t 4.17e+07 a 2 s peak one cycle surge current, 50hz, v r =0v i fsm 92,500 a fuse coordination i 2 t, 50hz i 2 t 4.28e+07 a 2 s operating temperature tj -40 to+160 c storage temperature t stg. -50 to+190 c approximate weight 6.5 lb 2.95 kg mounting force 16,000 - 20,000 lbs 71.2 - 89.0 knewtons the information on this datasheet is based upon powerex testing and projected ratings and is subject to change without notice. powerex makes no implicit or explicit claim to reliability, capability, performance or suitability of this product for a users application. powerex makes no guarantee of future availability of this product. page 2
rdk8__85xx general purpose rectifier diode powerex, inc., 200 hillis street, youngwood, pa 15697-1800 (724) 925-7272 www.pwrx.com 8500 amperes 3000 volts electrical characteristics, tj=25c unless otherwise specified rating characteristic symbol test conditions min typ max units repetitive peak reverse leakage current i rrm tj=160c, v rrm =rated 150 300 ma peak on-state voltage v fm tj=160c, i fm =4000a 0.82 v v fm model, low level v 0 tj=160c 0.762 v vfm = v o + r? i fm r 15% i fm - ?i fm 5.28e-02 m ? v fm model, high level v 0 tj=160c 0.937 v vfm = v o + r? i fm r ?i fm - i fsm 4.58e-02 m ? v fm model, 4-term a tj=160c 0.462 v fm = a + b?ln(i fm ) + b 15%i fm - i fsm 3.10e-02 c?(i fm ) + d?(i fm ) ? c 4.24e-05 d 1.43e-03 reverse recovery time t rr tj=25c, i fm =400a 35 s di r /dt = 25 a/s thermal characteristics rating characteristic symbol test conditions min typ max units thermal resistance junction to case r jc double side cooled 0.006 0.0063 c/watt case to sink r cs double side cooled 0.0008 0.001 c/watt thermal impedance model z jc double side cooled z jc (t) = (a( n )?(1-exp(-t / tau ( n )))) where: n = 12 3 4 a(n ) = 1.43e-04 9.08e-04 2.07e-03 3.20e-03 t au(n) = 2.62e-03 4.31e-02 6.05e-01 6.00e+00 page 3
rdk8__85xx general purpose rectifier diode powerex, inc., 200 hillis street, youngwood, pa 15697-1800 (724) 925-7272 www.pwrx.com 8500 amperes 3000 volts maximum transient thermal impedance 0.0e+00 1.0e-03 2.0e-03 3.0e-03 4.0e-03 5.0e-03 6.0e-03 7.0e-03 0.01 0.1 1 10 100 time (sec) thermal impedance (c/watt) maximum on-state voltage drop 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 1000 10000 100000 ifm (a) vfm (v) tj = 175c power dissipation 0 4000 8000 12000 16000 0 2000 4000 6000 8000 10000 average fwd current (a) power dissipation (watts) 180 sine (1 ) 120 square (3 ) allowable case temperature 60 80 100 120 140 160 180 0 2000 4000 6000 8000 10000 average fwd current (a) case temperature (c) 180 sine (1 ) 120 square (3 ) page 4
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