microsemi scottsdale division page 1 copyright ? 2005 9-12-2005 rev 0 www. microsemi . com ELCR80, e3 low capacitance rectifier scottsdale division descri pt i on appearan ce the ELCR80 low capacitance rectifier is used in parallel with a low-capacitance t ransient voltage suppressor (tvs) such as the lce6.5-170a series for unidirectional applications as shown in figure 4. it is rated for 100 amp forward surges to compliment this 1500 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 100 pf when used in parallel to the lce6.5-170a series will result in a total capacitance of 200 pf or less at zero volts for protecting higher frequency applications from inductive switching threats or electrical systems involving secondar y 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. t-18 important: for the most current data, consult microsemis website: http://www.microsemi.c o m feat u res appli cat i on s / ben efi t s ? suppresses transient in forward direction up to 1500 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. mxELCR80, mvELCR80, etc. ? also available in surface mount package with part number hsmbjlcr80 (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 1 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: 100 amps @ 10/1000 s with repetition rate of 0.01% or less* ? steady state power dissipation: 5 watts at t l = 25 o c 3/8 inch from body ? 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 body meeting ul94v-0 ? finish: tin-lead or rohs compliant annealed matte-tin plating readily solderable per mil-sd-750, method 2026 ? polarity: cathode marked with band ? marking: part number ELCR80 or elcre3 ? weight: 0.7 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 ELCR80 ELCR80e3 200 220 10 7.0 100 100 ELCR80, e3 *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 0 www. microsemi . com ELCR80, 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 ELCR80 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 lce6.5 C 170a series of low capacitance tvss that are rated at 100 pf maximum. this results in a total of 2 00 pf maximum in this parallel configuration since the ELCR80 is also the same capacitance value of 100 pf maximum. pack age di m en si on s ELCR80 low capacitance rectifier lce xxx (low capacitance tvs) figure 4 unidirectional configuration of low capacitance tvs (such as the lce6.5-170a series) and a separate ELCR80 rectifier in parallel) ELCR80, 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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