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. SL1021A xxxC • Satellite and CATV equipment. SL1021B xxxR • General telecom equipment. All dimensions in mm a b ø8.0+ _0.2 9.5 MAX e 3 ELECTRODE GDT a=TIP b=RING e=GROUND (centre electrode) GRAPHICAL SYMBOL ø1.0+ _0.2 SL1021B xxxRF SL1021B xxxRS ORDERING INFORMATION SL 1021 B Mechanical Specifications: Voltage Weight: Materials: Pin Configuration C=Core R=Leaded Failsafe Optio n F=Plastic S=Solder 338 Device Marking: w w w. l i t t e l f u s e . c o m 0.63g (0.022 oz.) Electrode Base: Nickel Iron Alloy Electrode Plating: Bright Sn Body: Ceramic Littelfuse ‘LF’ marking, Voltage and date code. Blue. 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 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) Part Number DC Voltage @ 100V/sec (V) DC Breakover Voltage Min-Max (V) Max Dynamic Breakover Voltage @ 100V/µs SL1021B145 145 116-174 500 20 10 10 20 2.5 100 shots SL1021B150 150 120-180 500 20 10 10 20 2.5 100 shots SL1021B200 200 150-250 350 20 10 10 20 2.5 100 shots SL1021B230 230 184-276 350 20 10 10 20 2.5 100 shots SL1021B250 250 200-300 400 20 10 10 20 2.5 100 shots SL1021B260 260 210-310 420 20 10 10 20 2.5 100 shots SL1021B300 350 240-360 450 20 10 10 20 2.5 100 shots SL1021B350 350 280-420 500 20 10 10 20 2.5 100 shots SL1021B400 400 320-480 550 20 10 10 20 2.5 100 shots SL1021B420 420 345-500 600 20 10 10 20 2.5 100 shots SL1021B450 450 360-540 650 20 10 10 20 2.5 100 shots SL1021B500 500 400-500 750 20 10 10 20 2.5 100 shots Life Test Rating2 GAS DISCHARGE TUBES 8 (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 Time vs. Current for Failsafe 50 Max dynamic breakover voltage 45 40 35 Time (s) Voltage (V) 30 25 20 15 Hold-over voltage 10 5 On-State voltage 0 0 0 200 400 600 Time (ns) 800 1000 1200 1 1 line to ground both lines to ground w w w. l i t t e l f u s e . c o m 2 3 4 5 6 Current (A) 339 Gas Discharge Tubes High Performance Beta Range RoHS Pb Greentube™ SL1021B Series Gas Plasma Arresters Profile for reflow soldering ® Profile for wave soldering 250 300 225 T 1 max = 266oC Solder Flow Area 175 150 T 1 = 239oC 125 100 200 75 Temperature (˚C) Temperature ˚C 200 50 25 0 0 50 100 150 200 250 300 Time in seconds 350 400 450 Tm = 179oC Forced Cooling Preheating Area 500 100 10 20 30 Time(seconds) Notes: T1 max T1 Tm Tamb = Maximum TabTemperature = 266oC = Flow Tempearture of Solder = 239oC = Melting Point of Solder = 179oC o = 25 C o Maximum permissible rate of temperature change = 7C / sec 340 w w w. l i t t e l f u s e . c o m 40