features high surge current capability avalanche types available stud cathode and stud anode version wide current range types up to 1200v v rrm typical applications battery charges converters power supplies machine tool controls parameters 25f(r) units i f(av) 25 a @ t c 120 c i f(rms) 40 a i fsm @ 50hz 356 a @ 60hz 373 a i 2 t@ 50hz 636 a 2 s @ 60hz 580 a 2 s v rrm range 100 to 1200 v t j range - 65 to 175 c major ratings and characteristics case style do-203aa (do-4) 25f(r) series standard recovery diodes 25 a 1 stud version bulletin i2018 rev. c 01/05 www.irf.com
25f(r) series 2 bulletin i2018 rev. c 01/05 www.irf.com voltage v rrm , maximum v rsm , maximum non- v r(br) , minimum i rrm max. type number code repetitive peak repetitive peak avalanche @ t j = 175c reverse voltage reverse voltage voltage vvv (1) ma 10 100 150 -- 20 200 275 -- 40 400 500 500 25f(r) 60 600 725 750 12 80 800 950 950 100 1000 1200 1150 120 1200 1400 1350 electrical specifications voltage ratings i f(av) max. average forward current 25 a 180 conduction, half sine wave @ case temperature 120 c i f(rms) max. rms forward current 40 a p r maximum non-repetitive 10 k/w 10s square pulse, t j = t j max. peak reverse power see note (2) i fsm max. peak, one-cycle forward, 356 t = 10ms no voltage non-repetitive surge current 373 t = 8.3ms reapplied 300 t = 10ms 100% v rrm 314 t = 8.3ms reapplied sinusoidal half wave, i 2 t maximum i 2 t for fusing 636 t = 10ms no voltage initial t j = t j max. 580 t = 8.3ms reapplied 450 t = 10ms 100% v rrm 410 t = 8.3ms reapplied i 2 t maximum i 2 t for fusing 6360 a 2 s t = 0.1 to 10ms, no voltage reapplied v f(to)1 low level value of threshold voltage v f(to)2 high level value of threshold voltage r f 1 low level value of forward slope resistance r f 2 high level value of forward slope resistance v fm max. forward voltage drop 1.30 v i pk = 78a, t j = 25c, t p = 400s rectangular wave parameter 25f(r) units conditions 5.70 (i > x i f(av) ), t j = t j max. 6.80 (16.7% x x i f(av) < i < x i f(av) ), t j = t j max. m ? 0.90 (i > x i f(av) ), t j = t j max. 0.80 (16.7% x x i f(av) < i < x i f(av) ), t j = t j max. v a 2 s a forward conduction (2) available only for avalanche version, all other parameters the same as 25f. (1) avalanche version only available from v rrm 400v to 1200v.
25f(r) series 3 bulletin i2018 rev. c 01/05 www.irf.com parameter 25f(r) units conditions t j max. junction operating temperature range -65 to 175 t stg max. storage temperature range -65 to 200 r thjc max. thermal resistance, junction to case 1.5 dc operation r thcs max. thermal resistance, case mounting surface, smooth, flat and to heatsink g reased t allowable mounting torque 1.5 +0-10% n m not lubricated threads 13 lbf.in 1.2 +0-10% nm lubricated threads 10 lbf.in wt approximate weight 7 (0.25) g (oz) case style do-203aa (do-4) see outline table c 0.5 k/w thermal and mechanical specifications 180 0.28 0.24 t j = t j max. 120 0.39 0.41 90 0.50 0.54 60 0.73 0.75 30 1.20 1.21 conduction angle sinusoidal co nduction rectangular conduction units conditions k/w ? r thjc conduction (the following table shows the increment of thermal resistence r thjc when devices operate at different conduction angles than dc) ordering information table 1 2 3 4 5 device code a 25 f r 120 m 1 - a = avalanche diode none = standard diode 2 - current rating: code = i f(av) 3 - f = standard device 4 - none = stud normal polarity (cathode to stud) r = stud reverse polarity (anode to stud) 5 - voltage code: code x 10 = v rrm (see voltage ratings table) 6 - none = stud base do-203aa (do-4) 10-32unf-2a m = stud base do-203aa (do-4) m5 x 0.8 - (not available for avalanche diodes) 6
25f(r) series 4 bulletin i2018 rev. c 01/05 www.irf.com outlines table fig. 1 - current ratings characteristics fig. 2 - current ratings characteristics 100 110 120 130 140 150 160 170 180 0 5 10 15 20 25 30 30 60 90 120 180 maximum allowable case temperature (c) conduction angle average forward current (a) 25f(r) series r (dc) = 1.5 k/w thjc 100 110 120 130 140 150 160 170 180 0 5 10 15 20 25 30 35 40 45 dc 30 60 90 120 180 maximum allowable case temperature (c) conduction period average forward current (a) 25f(r) series r (dc) = 1.5 k/w thjc case style do-203aa (do-4) all dimensions in millimeters (inches)
25f(r) series 5 bulletin i2018 rev. c 01/05 www.irf.com fig. 3 - forward power loss characteristics 0 25 50 75 100 125 150 175 maximum allowable ambient temperature (c) r = 1 k / w - d e l t a r t h s a 2 k / w 3 k / w 4 k / w 6 k / w 8 k / w 1 2 k / w 2 0 k /w 4 0 k / w 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 average forward current (a) rms limit maximum average forward power loss (w) conduction angle 180 120 90 60 30 25f(r) series t = 175c j fig. 4 - forward power loss characteristics 0 25 50 75 100 125 150 175 maximum allowable ambient temperature (c) r = 1 k / w - d e l t a r 2 k / w 3 k / w 4 k / w 6 k / w 1 2 k / w 8 k / w 2 0 k / w 4 0 k / w th s a 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 dc 180 120 90 60 30 average forward current (a) rms limit maximum average forward power loss (w) conduction period 25f(r) series t = 175c j fig. 5 - maximum non-repetitive surge current fig. 6 - maximum non-repetitive surge current 50 100 150 200 250 300 350 110100 peak half sine wave forward current (a) number of equal amplitude half cycle current pulses (n) initial t = 175c @ 60 hz 0.0083 s @ 50 hz 0.0100 s at any rated load condition and with rated v applied following surge. rrm j 25f(r) series 0 50 100 150 200 250 300 350 400 0.01 0.1 1 10 peak half sine wave forward current (a) pulse train duration (s) maxi mum non repeti tive surge current initial t = 175c no voltage reapplied rated v reapplied versus pulse train duration. j rrm 25f(r) series
25f(r) series 6 bulletin i2018 rev. c 01/05 www.irf.com fig. 7 - forward voltage drop characteristics fig. 8 - thermal impedance z thjc characteristics 1 10 100 1000 0 0.5 1 1.5 2 2.5 3 3.5 4 t = 25c j instantaneous forward current (a) instantaneous forward voltage (v) t = 175c j 25f(r) series 0.1 1 10 0.001 0.01 0.1 1 10 square wave pulse duration (s) thjc transient thermal impedance z (k/w) 25f(r) series steady state value r = 1.5 k/w (dc operation) thjc
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