Datasheet

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POWER SUPPLY SYSTEMS DEHNflex
SPDS TYPE 3 DFL M 255
Dimension drawing DFL M Basic circuit diagram DFL M
DFL M: Surge arrester for use in all types of installation systems for terminal equipment;
compact dimensions
Two-pole surge arrester with monitoring device
and disconnector
Enhanced safety due to distinctive Y protection
circuit
Acoustic fault indication
Compact design
For use in flush-mounted systems, cable ducts
and flush-type boxes
DFL M 255
SPD according to EN 61643-11 Type 3
SPD according to IEC 61643-1 Class III
Nominal a.c. voltage [U
N]
230 V
Max. continuous operating a.c. voltage [U
C]
255 V
Nominal discharge current (8/20 µs) [I
n]
1.5 kA
Total discharge current (8/20 µs) [L+N-PE] [I
total]
3 kA
Combined impulse [U
OC]
3 kV
Combined impulse [L+N-PE] [U
OC total]
6 kV
Voltage protection level [L-N] [U
P]
≤ 1.25 kV
Voltage protection level [L/N-PE] [U
P]
≤ 1.5 kV
Response time [L-N] [t
A]
≤ 25 ns
Response time [L/N-PE] [t
A]
≤ 100 ns
Max. mains-side overcurrent protection 32 A gL/gG or B 32 A
Short-circuit withstand capability for mains-side overcurrent
protection with 32 A gL/gG
6 kA
rms
Temporary overvoltage (TOV) [L-N] [U
T]
335 V / 5 sec.
Temporary overvoltage (TOV) [L/N-PE] [U
T]
400 V / 5 sec.
Temporary overvoltage (TOV) [L+N-PE] [U
T]
1200 V + U
0
/ 20
TOV characteristics [L-N] withstand
TOV characteristics [L/N-PE] withstand
TOV characteristics [L+N-PE] failure
Fault indication acoustic signal on
Number of Ports 1
Operating temperature range [T
U]
-25°C...+40°C
Terminal wires 1 mm
2
, length: 120 mm
Enclosure material thermoplastic, red, UL 94 V-2
Location category indoor
Degree of protection of installed device IP 20
Dimension 30 x 50 x 11 mm
Ordering information
Type DFL M 255
Part No. 924 396