https://www.phoenixcontact.com/us/produkte/2795960
05.10.2012Page2/4
Surge protection device-TT-UKK5-M/ 24DC-2795960
Technical data
Protective circuit
IEC category C3
VDE requirement class C3
Nominal voltage UN 24 V DC
Maximum continuous operating voltage UC 28 V DC
Maximum continuous operating voltage UC 20 V AC
Maximum continuous voltage UC (wire-wire) 28 V DC
Maximum continuous voltage UC (wire-ground) 20 V AC
Nominal current IN 12 A (45°C)
Operating effective current IC at UC ≤ 5 µA
Nominal discharge surge current In (8/20) µs (Core-Core) 169 A
Total surge current (8/20) µs 169 A
Max. discharge surge current Imax (8/20) µs maximum (Core-
Core)
169 A
Nominal pulse current Ian (10/1000) µs (Core-Core) 33 A
Output voltage limitation at 1 kV/µs (Core-Core) static ≤ 40 V
Residual voltage at In, (conductor-conductor) ≤ 55 V
Response time tA (Core-Core) ≤ 1 ns
Cut-off frequency fg (3 dB), sym. in 150 Ohm system Typ. 1.2 MHz
Capacity (Core-Core) ≤ 1.6 nF
Surge carrying capacity in acc. with IEC 61643-21 (Core-Core) C3 (25 A)
Connection data
Connection method Screw connection
Connection type IN Screw terminal blocks
Connection type OUT Screw terminal blocks
Screw thread M3
Tightening torque 0.5 Nm
Stripping length 8 mm
Conductor cross section stranded min. 0.2 mm²
Conductor cross section stranded max. 4 mm²
Conductor cross section solid min. 0.2 mm²
Conductor cross section solid max. 4 mm²
Conductor cross section AWG/kcmil min. 24
Conductor cross section AWG/kcmil max 12
Connection, protective circuit
Standards/regulations IEC 61643-21
Classifications
eclass
eCl@ss 4.0 27140201
eCl@ss 4.1 27130801
eCl@ss 5.0 27130801
