? semiconductor components industries, llc, 2000 october, 2000 rev. 4 1 publication order number: mr750/d mr750 series mr754 and mr760 are preferred devices high current lead mounted rectifiers ? current capacity comparable to chassis mounted rectifiers ? very high surge capacity ? insulated case mechanical characteristics: ? case: epoxy, molded ? weight: 2.5 grams (approximately) ? finish: all external surfaces corrosion resistant and terminal lead is readily solderable ? lead temperature for soldering purposes: 260 c max. for 10 seconds ? polarity: cathode polarity band ? shipped 1000 units per plastic bag. available tape and reeled, 800 units per reel by adding a arl'' suffix to the part number maximum ratings please see the table on the following page device package shipping ordering information axial lead button case 194 style 1 http://onsemi.com mr750rl axial lead 800/tape & reel mr750 axial lead 1000 units/bag mr751 axial lead 1000 units/bag mr751rl axial lead 800/tape & reel mr752 axial lead 1000 units/bag high current lead mounted silicon rectifiers 50 1000 volts diffused junction mr752rl axial lead 800/tape & reel preferred devices are recommended choices for future use and best overall value. mr754 axial lead 1000 units/bag mr756 axial lead 1000 units/bag mr754rl axial lead 800/tape & reel mr756rl axial lead 800/tape & reel mr760 axial lead 1000 units/bag mr760rl axial lead 800/tape & reel marking diagram mr7xx lyyww mr7xx = device code xx = 50, 51, 52, 54, = 56 or 60 l = location code yy = year ww = work week
mr750 series http://onsemi.com 2 maximum ratings characteristic symbol mr750 mr751 mr752 mr754 mr756 mr760 unit peak repetitive reverse voltage working peak reverse voltage dc blocking voltage v rrm v rwm v r 50 100 200 400 600 1000 volts nonrepetitive peak reverse voltage (halfwave, single phase, 60 hz peak) v rsm 60 120 240 480 720 1200 volts rms reverse voltage v r(rms) 35 70 140 280 420 700 volts average rectified forward current (single phase, resistive load, 60 hz) see figures 5 and 6 i o 22 (t l = 60 c, 1/8 lead lengths) 6.0 (t a = 60 c, p.c. board mounting) amps nonrepetitive peak surge current (surge applied at rated load conditions) i fsm 400 (for 1 cycle) amps operating and storage junction temperature range t j , t stg 65 to +175 c electrical characteristics characteristic and conditions symbol max unit maximum instantaneous forward voltage drop (i f = 100 amps, t j = 25 c) v f 1.25 volts maximum forward voltage drop (i f = 6.0 amps, t a = 25 c, 3/8 leads) v f 0.90 volts maximum reverse current t j = 25 c (rated dc voltage) t j = 100 c i r 25 1.0 m a ma
mr750 series http://onsemi.com 3 figure 1. forward voltage figure 2. maximum surge capability figure 3. forward voltage temperature coefficient figure 4. typical transient thermal resistance 1.8 2.4 0.6 v f , instantaneous forward voltage (volts) 700 500 20 50 10 i f , instantaneous forward current (amp) 5.0 2.0 1.0 1.2 0.8 1.0 1.4 1.6 2.0 2.2 2.6 7.0 100 70 0.2 0.5 0.7 200 30 3.0 0.3 300 maximum typical t j = 25 c number of cycles at 60 hz 100 1.0 300 100 80 60 i 2.0 5.0 10 20 50 200 400 600 , peak half wave current (amp) fsm t j = 175 c 25 c v rrm may be applied between each cycle of surge. the t j noted is t j prior to surge i f , instantaneous forward current (amp) 1.0 0.2 +0.5 0 -0.5 -1.0 -1.5 -2.0 2.0 coefficient (mv/ c) 10 20 100 200 0.5 5.0 50 typical range t, time (seconds) 1.0 10 1.0 0.2 2.0 5.0 10 20 50 5.0 20 r 3.0 2.0 0.5 0.3 0.1 0.2 0.3 0.5 0.7 3.0 30 7.0 70 both leads to heat sink, with lengths as shown. variations in r jl(t) below 2.0 seconds are independent of lead connections of 1/8 inch or greater, and vary only about 20% from the values shown. val ues for times greater than 2.0 seconds may be obtained by drawing a curve, with the end point (at 70 seconds) taken from figure 8, or calculated from the notes, using the given curves as a guide. either typical or maximum values may be used. for r jl(t) values at pulse widths less than 0.1 second, the above curve can be extrapolated down to 10 m s at a continuing slope. thermal resistance ( c/w) 175 c 25 c 1/2" 3/8" 1/4" 1/8" , junction-to-lead transient jl(t) q heat sink l l
mr750 series http://onsemi.com 4 figure 5. maximum current ratings t l , lead temperature ( c) 0 8.0 i f(av) 0 12 20 28 40 80 120 160 200 figure 6. maximum current ratings 0 8.0 4.0 0 16 24 32 i f(av) , average forward current (amps) p f(av) figure 7. power dissipation , power dissipation (watts) 5/8" , average forward current (amps) capacitance loads 8.0 12 16 resistive inductive loads t a , ambient temperature ( c) 0 1.0 i f(av) 0 2.0 3.0 4.0 40 80 120 160 200 figure 8. steady state thermal resistance f = 60 hz , average forward current (amps) resistive inductive loads capacitance loads - 1 & 3 20 6 1 & 3 20 i avg t a(a) t a(k) t l(a) t c(a) t j t c(k) t l(k) p f r q s(a) r q l(a) r q j(a) r q j(k) r q l(k) r q s(k) use of the above model permits junction to lead thermal resistance for any mounting configuration to be found. lowest values occur when one side of the rectifier is brought as close as possible to the heat sink as shown below. terms in the model signify: t a = ambient temperature t c = case temperature t l = lead temperature t j = junction temperature r s = thermal resistance, heat sink to ambient r l = thermal resistance, lead to heat sink r j = thermal resistance, junction to case p f = power dissipation (subscripts a and k refer to anode and cathode sides, respectively.) values for thermal resistance components are: r l = 40 c/w/in. typically and 44 c/w/in maximum. r j = 2 c/w typically and 4 c/w maximum. since r j is so low, measurements of the case temperature, t c , will be approximately equal to junction temperature in practical lead mounted applications. when used as a 60 hz rectifierm the slow thermal response holds t j(pk) close to t j(avg) . therefore maximum lead temperature may be found from: t l = 175 -r q jl p f . p f may be found from figure 7. the recommended method of mounting to a p.c. board is shown on the sketch, where r q ja is approximately 25 c/w for a 1-1/2" x 1-1/2" copper surface area. values of 40 c/w are typical for mounting to terminal strips or p.c. boards where available surface area is small. board ground plane recommended mounting for half wave circuit 24 28 32 0 1/4 5.0 0 1/2 3/4 1.0 l, lead length (inches) r jl , thermal resistance, single lead to heat sink, insignificant heat flow through other lead 10 15 20 25 30 35 40 24 16 4.0 20 60 100 140 180 4.0 12 20 28 1/8 3/8 5/8 7/8 q junction-to-lead( c/w) both leads to heat sink with lengths as shown 3/8" 1/4" l = 1/8" 20 60 100 140 180 5.0 6.0 7.0 i (pk) = 5 i avg i (pk) = 10 i avg i (pk) = 20 i avg 10 i avg i (pk) = 5 i avg resistive - inductive loads both leads to heat sink, equal length 6 (i pk /i ave = 6.28) see note r q ja = 40 c/w see note r q ja = 25 c/w notes thermal circuit model (for heat conduction through the leads)
mr750 series http://onsemi.com 5 figure 9. rectification efficiency figure 10. reverse recovery time repetition frequency (khz) 2.0 1.0 100 50 30 20 70 3.0 5.0 100 relative efficiency (%) 70 7.0 10 20 30 50 t j = 25 c current input waveform i r /i f , ratio of reverse to forward current 0.2 0.1 20 7.0 5.0 2.0 1.0 7.0 0.3 0.5 10 3.0 t rr , reverse recovery time ( s) 10 0.7 1.0 2.0 3.0 5.0 t j = 25 c i f = 5 a 3 a 1 a i f 0 i r t rr figure 11. junction capacitance figure 12. forward recovery time v r , reverse voltage (volts) 1.0 3.0 500 300 200 100 70 50 2.0 c, capacitance (pf) 10 20 100 7.0 5.0 50 30 t j = 25 c 1.0 i f , forward pulse current (amp) 0.7 0.5 0.3 0.2 0.1 2.0 , forward recovery time ( s) t fr 5.0 3.0 1.0 7.0 10 fr = 1.0 v t j = 25 c fr f t fr t j = 175 c 30 700 1000 30 20 10 70 fr = 2.0 v r s r l v o figure 13. singlephase halfwave rectifier circuit the rectification efficiency factor s shown in figure 9 was calculated using the formula: s p (dc) p (rms) v 2 o (dc) r l v 2 o (rms) r l . 100% v 2 o (dc) v 2 o ( ac) v 2 o (dc) . 100% (1) for a sine wave input v m sin (wt) to the diode, assumed lossless, the maximum theoretical efficiency factor becomes: s (sine) v 2 m 2 r l v 2 m 4r l . 100% 4 p 2 . 100% 40.6% (2) for a square wave input of amplitude v m , the efficiency factor becomes: s (square) v 2 m 2 r l v 2 m r l . 100% 50% (3) (a full wave circuit has twice these efficiencies) as the frequency of the input signal is increased, the reverse recovery time of the diode (figure 10) becomes significant, resulting in an increasing ac voltage component across r l which is opposite in polarity to the forward current, thereby reducing the value of the efficiency factor s , as shown on figure 9. it should be emphasized that figure 9 shows waveform efficiency only; it does not provide a measure of diode losses. data was obtained by measuring the ac component of v o with a true rms ac voltmeter and the dc component with a dc voltmeter. the data was used in equation 1 to obtain points for figure 9.
mr750 series http://onsemi.com 6 package dimensions axial lead button case 19404 issue f notes: 1. cathode symbol on package. style 1: pin 1. cathode 2. anode a k b k 2 1 d dim min max min max inches millimeters a 8.43 8.69 0.332 0.342 b 5.94 6.25 0.234 0.246 d 1.27 1.35 0.050 0.053 k 25.15 25.65 0.990 1.010
mr750 series http://onsemi.com 7 notes
mr750 series http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 3036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mr750/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
|
