Gas Discharge Tubes SL1026 Series SL1026 Series RoHS Description The SL1026 Series is a heavy-duty transient suppresser using Gas Plasma technology. In response to transients that exceed the device's breakover voltage, the device changes from a very high impedance state to a low impedance state to conduct harmful current away from the protected system. The SL1026 is designed to protect electrical and electronic equipment such as communications, control and railway systems. Carefully designed geometry ensures against short circuiting if a failure occurs due to conditions and events beyond the design criteria. Optional electrical mounting clip (part SL1053 ) is available to aid mounting and connection. 3 Electrode GDT Graphical Symbol a a = TIP b = RING e = GROUND (centre electrode) b Features e Additional Information Datasheet Resources •Will protect against capacitor discharge voltage transient waveforms as specified in RIA 12. •Will protect against double exponential voltage transient waveforms as specified in IEC 571. •RoHS compliant •55 kA surge capability (single shot) tested with 8/20μS pulse as defined by IEC 61000-4-5 •40 kA surge capability (repetitive) •Will protect against Trapezoidal waveforms as specified in RIA 12. Samples Applications •Trackside cabinets. •Cell phone base stations •Signaling equipment. •Communication equipment •Control gear. Electrical Characteristics DC Voltage 100 V/sec Part Number* MIN MAX DC Voltage 1kV/µs 1 AC Current 9 cycles @50-60Hz (Amps) 1 AC Current 50Hz 1 sec x10 (Amps) 1 Surge Current 8/20μSec x 10 (kAmps) Max Single Surge 8/20μSec (kAmps) 1,2 Max Single Surge 10/350μSec (kAmps) 1 1 150(+) and 150(-) 10/1000μSec (Amps) SL1026-275 200 350 800 200 10 20 40 8 200 SL1026-400 300 500 900 200 10 20 40 8 200 SL1026-700 560 840 1300 200 10 20 40 8 200 NOTES: End of life limits -- DC: 50% of minimum initial DC breakdown voltage limit to 150% of maximum initial DC breakdown voltage limit. -- Impulse: less that 150% of initial impulse breakdown voltage limit. 1. Total current through center electrode, tested using SL1053B-NL holder 2. Exceeds capability of SL1053B-NL holder © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 Gas Discharge Tubes SL1026 Series Product Dimensions Voltage vs. Time Characteristic SL1026 GDT Series Profile Max dynamic breakover voltage 45.0 Max 22.0 Ref Voltage (V) Ø8.7 Ø9.1 Max Max Type 1053 Holder Profile Hold-over voltage On-State voltage 0 200 400 600 800 1000 1200 Time (ns) Electrical Specifications Insulation Resistance > 10GΩ at 100 Volts Capacitance: <=2.5pf, 1MHz 0 Volts Bias Holdover Voltage: <150mS, tested at 130 volts according to ITU-T Rec. K.12 & REA PE 80 Arc Voltage: ~35 Volts, On State Voltage at 1 Amp (Depending on Voltage Type) Glow to Arc Transition Current: ~1 Amp Glow Voltage: > 150 Volts, depending on Voltage Type Physical Specifications Weight: 11g (0.388 oz.) Materials: Electrode Base: Nickel Iron Alloy Electrode Plating: Nickel Body: Ceramic Part Marking: Color coded body SL1026-275: Black/Black SL1026-400: Black/Yellow SL1026-700: Black/Red Storage and Operating Temperature: -40°C to +90°C © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/06/15 All dimensions in mm Part Numbering System SL 1026 – Voltage Packaging GDT devices are provided as bulk pack in poly bag -- 20 pieces per bag and 5 bags per carton.