New Products

Type 3 Surge Arresters
DEHNrail modular, multipole
30
L1 L1
L2 L2
L3 L3
L1 L2 L3 N
90
45
12
11
14
L1 L2 L3 N
36
(2 mods.)
7
43.5
66
15.3
9
11
PE PE
N N
Dimension drawing DR M 4P ... FM
Basic circuit diagram DR M 4P ... FM
Four-pole surge arrester consisting of a base part and plug-in protection module; FM version with
floating remote signalling contact
• Four-pole surge arrester consisting of
a base element and plug-in protection
module
• High discharge capacity due to heavyduty
zinc oxide varistor/spark gap combination
• Energy coordination with other arresters
of the Red/Line product family
953 400
DR M 4P 255
953 405
DR M 4P 255 FM
DR M 4P 255
953 400
Überspannungsableiter Typ 3 DEHNrail M4-polig 255V für
Industrieelektronik
DR M 4P 255 FM
953 405
Überspannungsableiter Typ 3 DEHNrail M4-polig 255V für
Industrieelektronik
Type DR M 4P 255 DR M 4P 255 FM
Part No. 953 400 953 405
SPD according to EN 61643-11 Type 3 Type 3
SPD according to 61643-1/-11 Class III Class III
Nominal a.c. voltage (U N ) 230/400 V 230/400 V
Max. continuous operating a.c. voltage (U C ) 255/440 V 255/440 V
Nominal load current a.c. (I L ) 25 A 25 A
Nominal discharge current (8/20 μs) (I n ) 3 kA 3 kA
Total discharge current (8/20 μs) [L1+L2+L3+N-PE] (I total ) 8 kA 8 kA
Combined impulse (U OC ) 6 kV 6 kV
Combined impulse [L1+L2+L3+N-PE] (U OC total ) 16 kV 16 kV
Voltage protection level [L-N] (U P ) ≤ 1000 V ≤ 1000 V
Voltage protection level [L/N-PE] (U P ) ≤ 1500 V ≤ 1500 V
Response time [L-N] (t A ) ≤ 25 ns ≤ 25 ns
Response time [L/N-PE] (t A ) ≤ 100 ns ≤ 100 ns
Max. mains-side overcurrent protection 25 A gL/gG or B 25 A 25 A gL/gG or B 25 A
Short-circuit withstand capability for
mains-side overcurrent protection with 25 A gL/gG 6 kA rms 6 kA rms
Temporary overvoltage (TOV) [L-N] (U T ) 335 V / 5 sec. 335 V / 5 sec.
Temporary overvoltage (TOV) [L/N-PE] (U T ) 400 V / 5 sec. 400 V / 5 sec.
Temporary overvoltage (TOV) [N-PE] (U T ) 1200 V / 200 ms 1200 V / 200 ms
TOV characteristics [L-N] withstand withstand
TOV characteristics [L/N-PE] withstand withstand
TOV characteristics [L+N-PE] safe safe
Operating temperature range (T U ) -40°C...+80°C -40°C...+80°C
Operating state/fault indication green / red green / red
Number of ports 1 1
Cross-sectional area (min.) 0.5 mm 2 solid/flexible 0.5 mm 2 solid/flexible
Cross-sectional area (max.) 4 mm 2 stranded/2.5 mm 2 flexible 4 mm 2 solid/2.5 mm 2 flexible
For mounting on 35 mm DIN rail acc. to EN 60715 35 mm DIN rail acc. to EN 60715
Enclosure material thermoplastic, red, UL 94 V-0 thermoplastic, red, UL 94 V-0
Place of installation indoor installation indoor installation
Degree of protection IP 20 IP 20
Capacity 2 modules, DIN 43880 2 modules, DIN 43880
Approvals, Certifications KEMA, VDE, UL KEMA, VDE, UL
Type of remote signalling contact –– changeover contact
a.c. switching capacity –– 250 V/0.5 A
d.c. switching capacity –– 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
Cross-sectional area for remote signalling terminals –– max. 1.5 mm 2 solid/flexible
Surge Arresters Type 3
Accessory for DEHNrail modular, multipole
Protection Module for DEHNrail M 4P
Four-pole protection module with integrated Y protective
circuit
Type DR MOD 4P 255
Part No. 953 020
Max. continuous operating a.c. voltage (U C ) 255 V
www.dehn.de
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