microsemi scottsdale division page 1 copyright ? 2005 9-12-2005 rev a www. microsemi . com lcr60, e3 low capacitance rectifier scottsdale division descri pt i on appearan ce the lcr60 low capacitance rectifier is us ed in parallel applications with a low- capacitance t ransient voltage suppressor (tvs) such as the sac5.0-50 series for unidirectional applications as shown in figure 4. it is rated for 44 amp forward surges to compliment this 500 watt tvs series and also provide a low capacitance and a low forward (v f ) voltage with fast response time. the low capacitance rating of 30 pf when used in parallel to the sac series will result in a total capacitance of 60 pf or less at zero volts for protecting higher frequency applications from inductive sw itching threats or electrical systems involving secondary lightning effects per iec61000-4-5 as well as rtca/do- 160d or arinc 429 for airborne avionics. with their fast response time, they also provide esd and eft protection per iec61000-4-2 and iec61000-4-4 respectively. do-41 important: for the most current data, consult microsemis website: http://www.microsemi.c o m lcr60, e3 feat u res appli cat i on s / ben efi t s ? suppresses transient in forward direction up to 500 watts peak pulse power @ 10/1000 s ? economical small plastic surface mount with robust axial subassembly package ? optional 100% screening for avionics grade is available by adding ma prefix to part number for added 100% temperature cycle -55 o c to +125 o c (10x) as well as surge (3x) and 24 hours htrb with post test v z & i r ? options for screening in accordance with mil-prf- 19500 for jan, jantx, jantxv, and jans are also available by adding mq, mx, mv, or msp prefixes respectively to part number, e.g. mxlcr60, mvlcr60, etc. ? also available in surface mount package with part number hsmbjlcr60 (see separate data sheet) ? rohs compliant devices available by adding e3 suffix ? low-capacitance rectifier to compliment the low capacitance tvs series for unidirectional applications ? improved protection of low capacitance tvs ? low capacitance for data-line protection to 10 mhz ? protection for aircraft fast data rate lines per select level waveforms in rtca/do-160d & arinc 429 with bit rates of 100 kb/s (per arinc 429, part 1, par. 2.4.1.1) ? esd and eft protection per iec61000-4-2 and iec61000-4-4 respectively ? secondary lightning protection per iec61000-4-5 with 42 ohms source impedance in the forward direction for class 1, 2, 3, and 4 ? secondary lightning protection per iec61000-4-5 with 12 ohms source impedance in the forward direction for class 1, 2, and 3 m ax i m u m rat i n gs m ech an i cal an d pack agi n g ? forward peak pulse current at 25 o c: 44 amps @ 10/1000 s with repetition rate of 0.01% or less* ? steady state power dissipation* at t l = +75 o c: 2.5 watts. ? clamping speed (0 volts to v (br) min.) less than 5 nanoseconds. ? operating and storage temperature: -65 o c to +150 o c ? case: void free transfer molded thermosetting plastic epoxy meeting ul94v-0 ? finish: tin-lead or rohs compliant annealed matte-tin plating readily solderable per mil-std-750, method 2026 ? polarity: cathode marked with band ? marking: part number lcr60 or lcr60e3 ? weight: 0.1 grams (approx.) elect ri cal ch aract eri st i cs @ 2 5 o c microsemi part number working peak reverse voltage v rwm volts reverse breakdown voltage @ i (br) 1.0ma v (br) volts min. reverse current @v rwm i r a maximum forward voltage @ i pp v f volts maximum peak pulse current* rating i pp amps maximum capacitance @ 0 volts pf lcr60 lcr60e3 200 220 10 7.0 44 30 *see figure 3 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503 downloaded from: http:///
microsemi scottsdale division page 2 copyright ? 2005 9-12-2005 rev a www. microsemi . com lcr60, e3 low capacitance rectifier scottsdale division graph s i pp C peak pulse current - % i pp peak power (single pulse) % of rated power average power t l C lead temperature C o c t C time C ms figure 2 figure 3 sch em at i c appli cat i on s a typical low capacitance tvs device configur ation is shown in figure 4 when used with a separate rectifier to maintain low cap acitance. as shown, an additional low capacitance rectifier diode is used in parallel in the same polarity direction as the tvs. in applica tions where random high voltage transients occur, this will prevent reverse transi ents from damaging the internal low capacitance rectifier diode within the tvs and also provide a low voltage conducting direct ion. this added rectifier diode such as t he lcr60 is of similar low capacitance as the tvs and also has a higher reverse voltage rating than the tvs clamping voltage v c . the unidirectional configuration in figure 4 will result in twice the capacitance of the sacxxx series of low capacitance tvss that are rated at 30 pf maximum. this results in a total of 60 pf max imum in this parallel configuration since the lcr60 is also the same capacitance value of 30 pf. pack age di m en si on s lcr60 low capacitance rectifier sacxxx (low capacitance tvs) figure 4 unidirectional configuration of low capacitance tvs (such as the sac5.0-50 series) and a separate lcr60 rectifier in parallel. lcr60, e3 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503 downloaded from: http:///
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