18A Datasheet, PDF (1/1 Pages) Littelfuse – 18A/18B Series Potted Gas Plasma Arresters

Gas Discharge Tubes
Modified Protector
18A/18B Series Potted Gas Plasma Arresters
®
Features
• Conforms to BT specifications D2982B
• Hermetically sealed eclosure for use in underground
joints and pole tops.
• Flying leads for easy connection to IDC or screw
terminals.
• High surge capability
• Conforms to BT specification D2982B
• Flame retardent materials to UL 94V0
a
b
e
3 ELECTRODE GDT
a=TIP
b=RING
e=GROUND
(centre electrode)
GRAPHICAL SYMBOL
All dimensions in mm
LITTELFUSE 3 TERMINAL POTTED ARRESTERS, 18A, 18B,
CONFORMS TO BT SPECIFICATION D2982B TOTALLY
NON-RADIOACTIVE, UL RECOGNIZED
Max Alternating
Electrical
DC
Impulse Discharge
Characteristics Sparkover¹ Sparkover² Current³
(V)
(V)
(A)
Impulse
Discharge
Current⁴
(kA)
Insulation Max
Resistance⁵ Capacitance⁶ Holdover⁷
(Ω)
(pF)
(V)
18A
210-310
800
5
5
1x10⁸
30
100
18B
400-500 1000
5
5
1x10⁸
30
100
(1) Measured using a rate of rise of voltage of 100V/s.
(2) Measured using a rate of rise of voltage of 1KV/µsec.
(3) Measured at 1 sec duration, 5 shots @ 3 min intervals, 50Hz.
(4) Measured using 8/20µsec, 5 shots each polarity.
(5) Measured at ±170V dc (18A) or ±350V dc (18B).
(6) Measured at 1 MHz, Line to ground.
(7) Measured using BT test circuit.
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ORDERING
INFORMATION
PROTECTOR 18A
PROTECTOR 18B