base anode 2 63.50 [2.500] 60.96 [2.400] 23.55 [.927] 20.42 [.804] 14.99 [.590] 15.75 [.620] 20.32 [.800] 17.78 [.700] 39.75 [1.565] 40.26 [1.585] 80.01 [3.150] 34.925 [1.375] 3.35 [.132] 3.02 [.119] 90.17 [3.550] 92.71 [3.650] 7.49 [.295] 6.99 [.275] 2x ? 10.41 [.410] 9.65 [.380] ? 4.70 [.185] 4.95 [.195] 1/4-20 slotted hex common cathode ref. terminal lug common cathode anode 1 terminal lug ? notes: 1. dimensions are shown in millimeters [inches]. 2. controlling dimension: millimeter modified jedec outline to-244ab dimensions in millimeters and (inches) i f(av) rectangular 300 a waveform v rrm range 35 to 45 v i fsm @ tp = 5 s sine 27000 a v f @ 150apk, t j =125c 0.62 v (per leg) t j range - 55 to 150 c characteristics 300cnq... units major ratings and characteristics the 300cnq center tap schottky rectifier module series has been optimized for low reverse leakage at high temperature. the proprietary barrier technology allows for reliable opera- tion up to 150 c junction temperature. typical applications are in high current switching power supplies, plating power supplies, ups systems, converters, free-wheeling diodes, welding, and reverse battery protection. 150 c t j operation center tap module high purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance low forward voltage drop high frequency operation guard ring for enhanced ruggedness and long term reliability description/features to-244ab schottky rectifier 300 amp 300cnq... series www.irf.com 1 bulletin pd-20481 10/01
300cnq... series 2 bulletin pd-20481 10/01 www.irf.com t j max. junction temperature range - 55 to 150 c t stg max. storage temperature range - 55 to 150 c r thjc max. thermal resistance junction 0.30 c/w dc operation * see fig. 4 to case (per leg) r thjc max. thermal resistance junction 0.15 c/w dc operation to case (per package) r thcs typical thermal resistance, case 0.10 c/w mounting surface , smooth and greased to heatsink wt approximate weight 79 (2.80) g (oz.) t mounting torque base min. 24 (20) max. 35 (30) mounting torque center hole typ. 13.5 (12) terminal torque min. 35 (30) max. 46 (40) case style to - 244ab modified jedec v fm max. forward voltage drop 0.61 v @ 150a (per leg) * see fig. 1 (1) 0.77 v @ 300a 0.62 v @ 150a 0.75 v @ 300a i rm max. reverse leakage current 15 ma t j = 25 c (per leg) * see fig. 2 (1) 750 ma t j = 125 c c t max. junction capacitance (per leg) 7750 pf v r = 5v dc , (test signal range 100khz to 1mhz) 25c l s typical series inductance (per leg) 6.0 nh from top of terminal hole to mounting plane dv/dt max. voltage rate of change 10000 v/ s (rated v r ) part number 300CNQ035 300cnq040 300cnq045 v r max. dc reverse voltage (v) v rwm max. working peak reverse voltage (v) voltage ratings absolute maximum ratings parameters 300cnq units conditions a i f(av) max. average forward (per leg) 150 a 50% duty cycle @ t c = 104 c, rectangular wave form current * see fig. 5 (per device) 300 i fsm max. peak one cycle non-repetitive 27000 5s sine or 3s rect. pulse surge current (per leg) * see fig. 7 2400 10ms sine or 6ms rect. pulse e as non-repetitive avalanche energy 150 mj t j = 25 c, i as = 30 amps, l = 0.67 mh (per leg) i ar repetitive avalanche current 30 a current decaying linearly to zero in 1 sec (per leg) frequency limited by t j max. v a = 1.5 x v r typical (1) pulse width < 300s, duty cycle <2% thermal-mechanical specifications parameters 300cnq units conditions t j = 25 c t j = 125 c v r = rated v r parameters 300cnq units conditions kg-cm (ibf-in) electrical specifications 35 40 45 following any rated load condition and with rated v rrm applied
300cnq... series 3 bulletin pd-20481 10/01 www.irf.com fig. 1 - maximum forward voltage drop characteristics reverse voltage - v r (v) fig. 3 - typical junction capacitance vs. reverse voltage forward voltage drop - v fm (v) instantaneous forward current - i f (a) reverse voltage - v r (v) junction capacitance - c t (pf) fig. 4 - max. thermal impedance z thjc characteristics t 1 , rectangular pulse duration (seconds) thermal impedance z thjc (c/w) reverse current - i r (ma) fig. 2 - typical values of reverse current vs. reverse voltage 1 10 100 1000 0 0.2 0.4 0.6 0.8 1 1.2 1.4 tj = 150?c tj = 125?c tj = 25?c 0.01 0.1 1 10 100 1000 10000 0 5 10 15 20 25 30 35 40 45 125 ? c 100 ? c 75 ? c 50 ? c 25 ? c tj = 150 ? c 1000 10000 0 5 10 15 20 25 30 35 40 45 tj = 25 ? c 0.001 0.01 0.1 1 0.00001 0.0001 0.001 0.01 0.1 1 10 single pulse (thermal resistance) d = 0.75 d = 0.50 d = 0.33 d = 0.25 d = 0.20 notes: 1. duty factor d = t1/ t2 2. peak tj = pdm x zthjc + tc 2 t 1 t p dm
300cnq... series 4 bulletin pd-20481 10/01 www.irf.com fig. 7 - max. non-repetitive surge current (per leg) fig. 5 - max. allowable case temperature vs. average forward current fig. 6 - forward power loss characteristics average forward current - i f(av) (a) allowable case temperature (c) average forward current - i f(av) (a) average power loss (watts) square wave pulse duration - t p (microsec) non-repetitive surge current - i fsm (a) (2) formula used: t c = t j - (pd + pd rev ) x r thjc ; pd = forward power loss = i f(av) x v fm @ (i f(av) / d) (see fig. 6); pd rev = inverse power loss = v r1 x i r (1 - d); i r @ v r1 = 80% rated v r 60 70 80 90 100 110 120 130 140 150 160 0 50 100 150 200 250 dc see note (2) square wave (d = 0.50) 80% rated vr applied 0 20 40 60 80 100 120 140 0 50 100 150 200 250 dc rms limit d = 0.75 d = 0.50 d = 0.33 d = 0.25 d = 0.20 1000 10000 100000 10 100 1000 10000 at any rated load condition and with rated vrrm applied following surge
300cnq... series 5 bulletin pd-20481 10/01 www.irf.com ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 tac fax: (310) 252-7309 visit us at www.irf.com for sales contact information. 10/01 data and specifications subject to change without notice. this product has been designed and qualified for industrial level. qualification standards can be found on ir's web site.
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