https://www.phoenixcontact.com/us/produkte/2818122
05.10.2012Page2/4
Surge protection device-S-PT1-2PE-24DC-2818122
Technical data
Protective circuit
IEC category D1
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-wire) 20 V AC
Nominal current IN 250 mA (25°C)
Operating effective current IC at UC ≤ 5 µA
Ground conductor current IPE ≤ 2 µA
Nominal discharge surge current In (8/20) µs (Core-Core) 10 kA
Nominal discharge surge current In (8/20) µs (Core-Earth) 10 kA
Total surge current (8/20) µs 20 kA
Max. discharge surge current Imax (8/20) µs maximum (Core-
Core)
10 kA
Max. discharge surge current Imax (8/20) µs maximum (Core-
Earth)
10 kA
Nominal pulse current Ian (10/1000) µs (Core-Core) 180 A
Nominal pulse current Ian (10/1000) µs (Core-Earth) 180 A
Output voltage limitation at 1 kV/µs (Core-Core) spike ≤ 60 V
Output voltage limitation at 1 kV/µs (Core-Earth) spike ≤ 450 V
Output voltage limitation at 1 kV/µs (Core-Core) static ≤ 60 V
Residual voltage at In, (conductor-conductor) ≤ 40 V
Residual voltage at In, (conductor-ground) ≤ 60 V
Residual voltage with Ian (10/1000)µs (conductor-conductor) ≤ 25 V
Residual voltage with Ian (10/1000)µs (conductor-ground) ≤ 20 V
Protection level UP (Core-Core) ≤ 55 V
Protection level UP (Core-Earth) ≤ 550 V
Response time tA (Core-Core) ≤ 1 ns
Response time tA (Core-Earth) ≤ 100 ns
Input attenuation aE, sym. ≤ 1.6 dB (up to 500 kHz, 50 Ω system)
Input attenuation aE, sym. ≤ 0.6 dB (up to 200 kHz, 150 Ω system)
Input attenuation aE, sym. ≤ 0.2 dB (up to 50 kHz, 600 Ω system)
Cut-off frequency fg (3 dB), sym. in 50 Ohm system Typ. 3.5 MHz
Cut-off frequency fg (3 dB), sym. in 150 Ohm system Typ. 1.5 MHz
Cut-off frequency fg (3 dB), sym. in 600 Ohm system Typ. 400 kHz
Capacity (Core-Core) Typ. 1.5 nF
Resistance in series 10 Ω 5%
Surge carrying capacity in acc. with IEC 61643-21 (Core-Core) C2 (10 kV/5 kA)
Surge carrying capacity in acc. with IEC 61643-21 (Core-Earth) C2 (10 kV/5 kA)
Surge carrying capacity in acc. with IEC 61643-21 (Core-Earth) D1 (2.5 kA)
Alternating current carrying capacity in acc. with IEC 61643-21
(Core-Earth)
5 A - 1 s
Connection data
