Datasheet
page1©2011 DEHN + SÖHNE GmbH + Co. KG Hans-Dehn-Str. 1 Postfach 1640 D-92306 Neumarkt, Germany, Tel. +499181 906-700 www.dehn.de, as at: 2011-05-02
INFORMATION TECHNOLOGY SYSTEMS BLITZDUCTOR® XT LifeCheck®
Modules
PLUGGABLE SPDS FOR DIN RAIL MOUNTING BXT ML4 BD 180
Dimension drawing BXT ML4 BD If LifeCheck detects thermal and electrical
overload, the SPD has to be replaced. This
status is indicated contactlessly by the
DEHNrecord LC reader.
Space-saving combined lightning current and surge arrester module with LifeCheck feature for
protecting 2 pairs of balanced interfaces which are galvanically isolated.
LifeCheck SPD monitoring function
Optimal protection of 2 single pairs
For installation in conformity with the lightning
protection zones concept at the boundaries
from 0
A
– 2 and higher
BXT ML4 BD 180
SPD class L
SPD monitoring system LifeCheck
Nominal voltage [U
N]
180 V
Max. continuous operating d.c. voltage [U
C]
180 V
Max. continuous operating a.c. voltage [U
C]
127 V
Nominal current at 45°C [I
L]
0.75 A
D1 Total lightning impulse current (10/350 µs) [I
imp]
10 kA
D1 Lightning impulse current (10/350 µs) per line [I
imp]
2.5 kA
C2 Total nominal discharge current (8/20 µs) [I
n]
20 kA
C2 Nominal discharge current (8/20 µs) per line [I
n]
10 kA
Voltage protection level line-line for I
imp
D1 [U
p]
≤ 270 V
Voltage protection level line-PG for I
imp
D1 [U
p]
≤ 550 V
Voltage protection level line-line at 1 kV/µs C3 [U
p]
≤ 250 V
Voltage protection level line-PG at 1 kV/µs C3 [U
p]
≤ 550 V
Series impedance per line 1.8 ohm(s)
Capacitance line-line [C] ≤ 240 pF
Capacitance line-PG [C] ≤ 16 pF
Operating temperature range -40°C...+80°C
Degree of protection (plugged-in) IP 20
Pluggable into base part
Earthing via base part
Enclosure material polyamide PA 6.6
Colour yellow
Test standards IEC 61643-21, UL 497B
SIL classification SIL2 / SIL3
for more details see: www.dehn.de/en/sil/
Ex certifications ATEX: DEKRA 11ATEX0089 X: II 3 G Ex nA IIC T4 Gc
IECEx DEK 11.0032X: Ex nA II T4 Gc
Approvals, Certifications CSA, VdS, UL, GOST
Ordering information
Type BXT ML4 BD 180
Part No. 920 347
Packing unit 1 pc
We reserve the right to modify design, technology, dimensions, weights and materials according to technical progress. Illustrations are non-binding. Pictures may differ from the modules described.