New Improved Littelfuse 1026 maximum duty arrester series a b e 3 ELECTRODE GDT a=TIP b=RING e=GROUND (centre electrode) 55 KILO AMPS CAPABILITY. (SINGLE SHOT) 40 KILO AMPS CAPABILITY. REPETITIVE GRAPHICAL SYMBOL LITTELFUSE MAXIMUM DUTY 3 TERMINAL ARRESTER TOTALLY NON-RADIOACTIVE, UL RECOGNISED 275V 400V 700V DC sparkover (V) 200-350 300-500 490-910 (i) Impulse sparkover (max) (V) 800 900 1000 (ii) (A) 40 40 40 (iii) (KA) 40 40 40 (iv) ELECTRICAL CHARACTERISTICS Alternating discharge current Impulse discharge current Insulation resistance (Ω) 2 x 10 2 x 10 2 x 10 (v) Capacitance (max) (pF) 2.5 2.5 2.5 (vi) Holdover (V) 150 150 150 (vii) Gap to gap transfer time (ns) 100 100 100 (viii) Voltage colour code BLACK YELLOW RED Type colour code BLACK BLACK BLACK 55 55 55 Impulse discharge current Single shot KA (i) End to centre or end to end, measured using a rate of rise of voltage of 100V/s. (ii) End to centre, measured using a rate of rise of voltage of 1KV/µsec. (iii) Measured at 1 sec duration, 5 shots @ 3 min intervals, 50Hz. (iv) Measured at 8/20µsec, 5 shots each polarity between one end and centre. (v) Measured at ± 100V dc. (vi) Measured at 1 MHz, end to centre. (vii) Measured using test based on ITU (formally CCITT) K12, section 4.2, test 3, with PS2 set to 0V & PS1 variable. (viii) Measured using a voltage rising at 1kV/µs (relative to the centre electrode) applied simultaneously to both end electrodes via separate 1k resistors. These devices are designed so that the failure mode is most likely to be open circuit rather than short-circuit. They may be used as a replacement for the 16 series (now obsolete) to handle higher a.c. fault currents. ORDERING INFORMATION SL 1026 – Voltage All dimensions in mm w w w. l i t t e l f u s e . c o m 75