SM2T18A STMicroelectronics

SM2T TRANSIL FEATURES High Peak pulse power: 200 W (10/1000 s ) 1000 W ( 8/20 s) Stand-off voltage range 5 to 24V A Unidirectional types Low clamping factor V /V CL BR K Fast response time 1.0mm overall component height DESCRIPTION STmite The SM2T series are Transil diodes designed spe- (JEDEC DO-216AA) cifically for portable equipment and miniaturized electronics devices subject to ESD transient over- voltages. Table 1: Order Codes Fully compatible with pick and place equipment and inspectable soldering joints. Part Number Marking SM2T6V8A MUA SM2T14A MUE SM2T18A MUG SM2T27A MUJ Table 2: Absolute Ratings (T = 25C) amb Symbol Parameter Value Unit 1 P T initial = T 200 W PP Peak pulse power dissipation (see note ) j amb T = 100C P Power dissipation on infinite heatsink 2.5 W amb t = 10 ms p I Non repetitive surge peak forward current 25 A FSM T initial = T j amb T stg -65 to 175 Storage temperature range C Maximum junction temperature T 150 j T Maximum lead temperature for soldering during 10 s. 260 C L Note 1: 10/1000s pulse waveform. Table 3: Thermal Resistances Symbol Parameter Value Unit Rth(j-t) Junction to tab 20 C/W Rth(j-a) Junction to ambient on PCB with recommended pad layout 250 C/W January 2005 REV. 3 1/6SM2T Table 4: Electrical Characteristics (T = 25C) amb I Symbol Parameter I F V Stand-off voltage RM V Breakdown voltage BR VV V CL BR V Clamping voltage V V CL RM F V I I Leakage current V RM RM RM I Peak pulse current PP T Voltage temperature coefficient I V Forward voltage drop PP F I V V I V I C T RM RM BR R CL PP max typ max min max Types note1 0V -4 A VV mA VA pF 10 /C SM2T6V8A 50 5 6.4 10 9.2 19.6 5.7 1600 SM2T14A 1 12 13.3 1 19.9 9 8.3 650 SM2T18A 1 16 17.1 1 26 7 8.8 500 SM2T27A 1 24 25.7 1 28.9 4.6 9.6 350 Note 1: 10/1000s pulse waveform. 2/6