Gas Discharge Tube Gdt Products Page 58 Gas Discharge Tube GDT Products

Gas Discharge Tubes 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 SG Series Reflow Condition Pb - Free assembly Pre Heat - Temperature Min (T s(min) ) 150C - Temperature Max (T s(max) ) 200C - Time (Min to Max) (t s ) 60 - 180 secs Average ramp up rate (Liquidus Temp (T L ) to peak 3C/second max T S(max) to T L - Ramp-up Rate 5C/second max Reflow - Temperature (T L ) (Liquidus) 217C - Temperature (t L ) 60 - 150 seconds Peak Temperature (T P ) 260 +0/-5 C Time within 5C of actual peak Temperature (t p ) 10 - 30 seconds Ramp-down Rate 6C/second max Time 25C to peak Temperature (T P ) 8 minutes Max. Do not exceed 260C Soldering Parameters - Reflow Soldering (Surface Mount Devices) Time Temperature T P T L T S(max) T S(min) 25 t P t L t S time to peak temperature (t 25C to peak) Ramp-down Ramp-up Preheat Critical Zone T L to T P Device Dimensions 4.5 +/- 0.3 2.7 +/- 0.3 0.5 +/- 0.1 5.2 2.8 3.2 +/- 0.3 Recommended Soldering Pad Layout 4 Dimensions in Millimeters. Device Marking Type Code A3A Production Year Code (last digit) Production Month Code Type Code A SG75 B SG90 C SG150 D SG230 E SG300 F SG300Q G SG350 H SG350Q I SG400 J SG420 K SG420Q L SG450Q M SG500Q N SG600Q O SG200 Month Code A January B February C March D April E May F June G July H August I September J October K November L December

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