maximum ratings & electrical characteristics mechanical data features data sheet no. sesa-401-1c mechanical specification 4 amp ultrafast recovery diodes case: jedec do-27 molded epoxy (u/l flammability rating 94v-0) terminals: plated axial leads solderability: per mil-std 202 method 208 guaranteed polarity: color band denotes cathode mounting position: any weight: 0.04 ounces (1.12 grams) c11 ratings at 25 c ambient temperature unless otherwise specified. single phase, half wave, 60hz, resistive or inductive load. for capacitive loads, derate current by 20%. average forward rectified current @ t = (as shown) a parameter (test conditions) maximum dc blocking voltage peak forward surge current ( 8.3ms single half sine wave superimposed on rated load) maximum forward voltage at: maximum peak recurrent reverse voltage maximum rms voltage series number i o v rms v rrm v rm symbol ratings volts amps units volts v fm i fsm 200 color banddenotes cathode ld (dia) bd (dia) ll bl ll 1.20 1.25 actual size of do-27 package sym in mm minimum maximum bl bdll ld 1.00 0.048 in mm 0.3650.205 0.052 9.285.2 1.3 25.4 1.2 ufr ufr ufr ufr ufr ufr ufr ufr ufr 401 402 403 404 406 408 409 410 5050 100100 200200 300300 400400 35 70 140 210 280 600600 800800 900900 10001000 420 560 630 700 @t =80 c a o @t =55 c a o 1.70 1.85 400 series ufr400 - ufr410 do - 27 4 4 typical thermal resistance: maximum average dc reverse current at rated dc blocking voltage i rm r q jl r q ja c/w m a @ t = 25 c j o @ t = 125 c j o 1050 5 50 7.5 18.0 (1) measured at 1mhz and an applied reverse voltage of 4 volts. junction operating and storage temperature range t j, t stg c typical junction capacitance (note 1) c j pf -65 to +175 3.01 ufr400 notes: maximum reverse recovery time (i =0.5a, i =1a, i =0.25a) f r rr t rr nsec 50 60 75 45 3-amps dc 4-amps dc junction to lead junction to air tel.: (310) 767-1052 fax: (310) 767-7958 diotec electronics corp. gardena, ca 90248 u.s.a 18020 hobart blvd., unit b low switching noise low thermal resistance high switching capability low forward voltage drop r proprietary junction passivation for superior reliability and performance soft glass void free vacuum die soldering for maximum mechanical strength and heat dissipation (solder voids: typical < 2%, max. < 10% of die area) rohs compliant
figure 5. typical junction capacitance reverse voltage, (volts) rating & characteristic curves for series ufr400 - ufr410 data sheet no. SESA-401-2C figure 3. typical forward characteristics instantaneous forward voltage (volts) 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 1.0 0.1 10 100 0.01 figure 4. typical reverse characteristics percent of rated peak reverse voltage figure 1. forward current derating curve ambient temperature, c o figure 2. maximum non-repetitive surge current number of cycles at 60 hz 1 10 100 250200 150100 50 0 4 amp ultrafast recovery diodes 3.01 ufr400 100 120 140 notes (1)(2) (3) t = 25 c, pulse width = 300 sec, 2.0% duty cycle (4) these curves are typical for the highest voltage diode in the voltage grouping. lead length = 0.375" (9.5mm) jedec method, 8.3 msec. single half sine wave j o m note 1 note 2 c12 20 40 0 60 80 note 3 10 100 resistive and inductive loads ufr406-410 ufr400-404 (1) ufr400-404 (2) ufr406-410 (1) ufr400-404 (2) ufr406-410 (1) (1) (2) (2) tel.: (310) 767-1052 fax: (310) 767-7958 diotec electronics corp. gardena, ca 90248 u.s.a 18020 hobart blvd., unit b note 4 t = 175 c j o t = 25 c j o t = 25 c j o (1) (1) ufr400-404 (2) ufr406-410 (2) t = 175 c j o (2) (1) 20 10 0 30 40 50
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