SL1021B

Gas Discharge Tubes High Performance Beta Range RoHS Pb Greentube™ SL1021B Series Gas Plasma Arresters ® The SL1021B series offers high levels of performance on fast rising transients in the domain of 100V/µS to 1KV/µS, which are those most likely from induced Lightning disturbances. The SL1021B series also features ultra low capacitance (typically 1pF or less) and optimised internal geometry which provides low insertion loss at high frequencies, so are ideal for the protection of broadband equipment. These devices are extremely robust and are able to divert a 20,000Amp pulse without destruction. FEATURES • RoHS compliant except ‘RS’ suffix • Low insertion loss • Excellent response to fast rising transients. • Ultra low capacitance. • 10KA surge capability tested with 8/20µS pulse as defined by IEC 6100-4-5 • 20,000 A single shot surge capability tested with 8/20µs pulse as defined by IEC 6100-4-5 • Available with thermal failsafe option (add ‘F’ or ‘S’ suffix to part number) Applications: • Broadband equipment. • ADSL equipment. • XDSL equipment. • Satellite and CATV equipment. • General telecom equipment. SL1021A xxxC SL1021B xxxR All dimensions in mm a b ø8.0+0.2 _ 3 ELECTRODE GDT a=TIP b=RING e=GROUND (centre electrode) GRAPHICAL SYMBOL SL1021B xxxRF SL1021B xxxRS ø1.0+0.2 _ ORDERING INFORMATION SL 1021 B Voltage Pin Configuration C=Core R=Leaded Failsafe Optio n F=Plastic S=Solder 338 Mechanical Specifications: Weight: Materials: 0.63g (0.022 oz.) Electrode Base: Nickel Iron Alloy Electrode Plating: Bright Sn Body: Ceramic Littelfuse ‘LF’ marking, Voltage and date code. Blue. Device Marking: w w w. l i t t e l f u s e . c o m 9.5 MAX e Gas Discharge Tubes High Performance Beta Range RoHS Pb Greentube™ SL1021B Series Gas Plasma Arresters ® LITTELFUSE 3 TERMINAL HEAVY DUTY ARRESTER SERIES TOTALLY NON-RADIOACTIVE, UL RECOGNIZED Part Number SL1021B145 SL1021B150 SL1021B200 SL1021B230 SL1021B250 SL1021B260 SL1021B300 SL1021B350 SL1021B400 SL1021B420 SL1021B450 SL1021B500 DC Voltage @ 100V/sec (V) 145 150 200 230 250 260 350 350 400 420 450 500 DC Breakover Voltage Min-Max (V) 116-174 120-180 150-250 184-276 200-300 210-310 240-360 280-420 320-480 345-500 360-540 400-500 Max Dynamic Breakover Voltage @ 100V/µs 500 500 350 350 400 420 450 500 550 600 650 750 Max Max Single Max Repetitive Max Impulse Alternating Impulse Max Impulse Discharge Current Discharge Alternating Discharge Discharge 10/350µs5,6 Current1,3,6 Current Discharge Current (kA) (A) (kA) Current5 (A) (kA) 20 20 20 20 20 20 20 20 20 20 20 20 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 20 20 20 20 20 20 20 20 20 20 20 20 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Life Test Rating2 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 100 shots 8 GAS DISCHARGE TUBES 6 (1) Total current through center (ground) electrode, both line electrodes pulsed simultaneously; half value through respective line terminal to ground. (2) 100 amps, 10/1000µS pulse (3) 10 shots, A.C. 60 Hz, 1sec. Duration. (4) 10 shots, 8/20µS waveform (5) either end (line) electrode to centre (ground) electrode (6) Applies to ‘C’ option devices mounted in a suitable connector with high pressure contacts. Voltage vs Time Characteristic 50 Max dynamic breakover voltage Time vs. Current for Failsafe 45 40 35 30 Voltage (V) Time (s) Hold-over voltage On-State voltage 25 20 15 10 5 0 0 1 1 line to ground both lines to ground 2 3 Current (A) 4 5 0 200 400 600 Time (ns) 800 1000 1200 w w w. l i t t e l f u s e . c o m 339 Gas Discharge Tubes High Performance Beta Range RoHS Pb Greentube™ SL1021B Series Gas Plasma Arresters Profile for reflow soldering Profile for wave soldering 300 ® 250 225 200 Temperature ˚C 175 150 125 100 Temperature (˚C) Solder Flow Area o T 1 m ax = 266C o T 1 = 239 C 200 75 50 25 0 0 50 100 150 200 250 300 350 400 450 500 Time in seconds Tm = 179oC Forced Cooling Preheating Area 100 10 20 Time(seconds) 30 40 Notes: T1 max T1 Tm Tam b = Maximum TabTemperature = 266oC = Flow Tempearture of Solder = 239oC = Melting Point of Solder = 179oC o = 25 C o C Maximum permissible rate of temperature change = 7 / sec 340 w w w. l i t t e l f u s e . c o m