SL1122A LITTELFUSE | Alldatasheet

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Technical content

347www.littelfuse.com 8GAS DISCHARGE TUBES Gas Discharge Tubes High Performance Alpha Range

ORDERING INFORMATION

3 ELECTRODE GDT

a=TIP b=RING e=GROUND (centre electrode) GRAPHICAL SYMBOL a b e Greentube™ SL1122A Series Hybrid Gas Plasma Arresters The SL1122 series Hybrid features a high performance Alpha Gas Plasma Tube in conjunction with a high speed Silicon Avalanche Diode ( SAD ). These devices are matched so that High speed pulses are initially clamped by the SAD, then as the current rises, the transient energy is switched through the Gas Tube. The Hybrid offers high levels of performance on fast rising transients in the domain of 100V/ µS to 10 KV/µS, so eliminates the dv/dt switching delay normally exhibited by standard GDT’s. These devices are extremely robust and are able to divert a 10,000Amp pulse without destruction, so are ideal for central office ( tele- phone exchange ) protection.

FEATURES

  • RoHs Compliant
  • Excellent response to fast rising transients.
  • Flat response up to 10KV/µS.
  • 10KA surge capability tested with 8/20µS pulse as defined by IEC 61000-4-5
  • SAD ensures short circuit failure mode in the event of severe transient overload.
  • Thermal failsafe. Applications:
  • MDF protection
  • Alarm panels.
  • ADSL equipment.
  • XDSL equipment.
  • General Telecom Equipment Mechanical Specifications: Weight: 2.7g (0.095 oz.) Materials: Electrode Base: Nickel Iron Alloy Electrode Plating: Bright Sn Body: Ceramic Device Marking: Littelfuse ‘LF’ logo, voltage and date code ®RoHS

348 www.littelfuse.com Gas Discharge Tubes CCT DIAGRAM LITTELFUSE 3 TERMINAL ARRESTER SERIES TOTALLY NON-RADIOACTIVE, UL BREAKER VOLTAGE Notes: (1) Measured using a voltage rate of rise of 100V/s. (2) In ionized mode (3) Tested according to ITU-T Rec.K.12 (4) Either end electrode to center electrode (5) Total current through center electrode, both line electrodes subject to simultaneous pulses (6) 10 shots, AC 60Hz, 1 sec duration (7) 10 shots, 8/20 µs waveform (8) Measured @ 100V (9) Measured at MHz, line to ground Part Number SL1122A090 SL1122A200 SL1122A230 SL1122A250 SL1122A260 SL1122A350 SL1122A450 DC Voltage (V) 200 230 250 260 350 450 Breakover Voltage1,2,4 (V) 70-120 140-250 184-276 200-300 210-350 280-420 420-600 Max Dynamic Breakover Voltage @ 1 kV/us (Vbr) 150 250 350 400 400 600 700 Max Repetitive Impulse Discharge Current 4,7 (kA) Max Repetitive Impulse Discharge Current 5,7 (kA) Alternating Discharge Current4,6 (A) Insulation Resistance8 (Ω) 1x108 @ 50V 1x108 @ 120V 1x108 @ 150V 1x108 @ 150V 1x108 @ 175V 1x108 @ 265V 1x108 @ 350V Max Capacitance9 (pF) 200 100 100 100 100 100 100 Greentube™ SL1122A Series Hybrid Gas Plasma Arresters High Performance Alpha Range Holdover Voltage3 (V) 120 135 135 135 135 135 Nominal On-State Voltage @ 1A (V) HYBRID G.D.T. ONLY RoHS