Datasheet
www.e-t-a.de
2
3120-N... Thermal Circuit Breaker
1846
1
Technical data Current ratings and internal resistance values
Current rating
(A)
Internal
resistance
per pole (Ω)
Current rating
(A)
Internal
resistance
per pole (Ω)
0.1 94 4 0.0435
0.2 24 4.5 0.0435
0.3 12 5 0.0325
0.4 5.30 6 0.0215
0.5 4.20 7 0.0165
0.6 2.90 8 0.0165
0.8 1.50 10 < 0.02
1 0.9 12 < 0.02
1.2 0.80 14 < 0.02
1.5 0.45 15 < 0.02
2 0.27 16 < 0.02
2.5 0.0785 18 < 0.02
3 0.0595 20 < 0.02
3.5 0.0565
For detailed technical information please see www.e-t-a.de/ti_e
Voltage ratings AC 240 V, DC 50 V
(AC 415 V upon request)
Current rating range 0.1 ... 20 A
(up to 30A upon request for single pole
units)
Typical life 1-pole
AC 240 V: 0.1...20 A 30,000 operations at 1 x I
N
, inductive
DC 50 V: 0.1...4 A 30,000 operations at 1 x I
N
, inductive
4.5...16 A 30,000 operations at 1 x I
N
, resistive
DC 28 V: 0.1...20 A 30,000 operations at 1 x I
N
, inductive
Typical life 2-pole
AC 240 V: 0.1...16 A 50,000 operations at 1 x I
N
, inductive
17...20 A 30,000 operations at 1 x I
N
, inductive
DC 50 V: 0.1...16 A 50,000 operations at 1 x I
N
, inductive
17...20 A 50,000 operations at 1 x I
N
, inductive
Ambient temperature -30 ... +60°C (-22 ... +140°F)
Insulation coordination
(IEC 60664)
2.5 kV /2 reinforced insulation at
operating area
Dielectric strength
operating area
pole to pole (2-pole)
test voltage AC 3,000 V
test voltage AC 1,500 V
Insulation resistance > 100 MΩ (DC 500 V)
Interrupting capacity Icn (IEC/EN 60934)
I
N
U
N
I
cn
1-pole, 2-pole 0.1 ... 2 A AC 240 V /
DC 50 V
10 x I
N
1-pole 2.5 ... 10 A DC 50 V 50 A
1-pole 2.5 ... 20 A AC 240 V /
DC 28 V
200 A
2-pole 2.5 ... 20 A DC 50 V 250 A
2-pole 2.5 ... 20 A AC 240 V /
DC 28 V
300 A
Interrupting capacity I
nc
(UL 1077)
I
N
U
N
I
nc
1-pole, 2- pole 0.1 ... 20 A AC 250 V 5,000 A, C, 1
1-pole, 2- pole 0.1 ... 20 A DC 50 V 1,000 A, C, 1
Degree of protection
(IEC 60529)
operating area IP65
mounting area IP65
terminal area IP00
Vibration 8 g (57-500 Hz), ± 0.61 mm (10-57 Hz)
test to IEC 60068-2-6, test Fc
10 frequency cycles/axis
Shock 30 g (11 ms)
test to IEC 60068-2-27, test Ea
Corrosion 96 hours at 5 % salt mist,
test to IEC 60068-2-11, test Ka
Humidity 240 hrs in 95 % RH
test to IEC 60068-2-78,
test Cab
Mass approx. 30 g (1-pole)
approx. 34 g (2-pole)
approx. 45 g (2-pole with PT terminals)