Datasheet
www.e-t-a.de
20
Thermal-magnetic circuit breaker 3120-N...-...M1-...
1930
 1
Approvals
Approval 
authority
Standard Voltage ratings Current rating 
range
VDE IEC/EN 
60934
AC 240 V 
DC 50 V
0.1 ... 16 A
0.1 ... 16 A
UL UL 1077 AC 250 V
AC 125 V
0.1 ... 10 A
0.1 ... 16 A
CSA C22.2 No 
235
AC 250 V 
DC 125 V
0.1...10 A 
0.1...14 A
CQC (CCC) GB 17701 AC 240 V 
DC 50 V
0.1...16 A 
0.1...16 A
For further details please see: www.e-t-a.de/ti_e
Rated voltage AC 240 V, DC 50 V (AC 415 V upon request)
Current rating range  0.1…16 A 
Typical life 1-pole
AC 240 V:  0.1...16 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...16 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
DC 50 V:  0.1...16 A  50,000 operations at 1 x I
N
, inductive
Ambient temperature  -30... 60 °C 
Insulation coordination
(IEC 60664)  2.5 kV / 2
    reinforced insulation in the operating area
Dielectric strength 
 Operating area  test voltage AC 3000 V
 Current path/current path  test voltage AC 1500 V
Insulation resistance  > 100 MOhm (DC 500 V)
Rupture capacity I
cn
 (IEC/EN 60934)
I
N
U
N
I
cn
1-pole, 2-pole 0.1 ... 2 A AC 240 V /  
DC 28 V
100 x I
N
1-pole 0.1 ... 10 A DC 50 V 50 A
1-pole 2.5 ... 16 A AC 240 V /  
DC 28 V
200 A
2-pole 0.1 ... 2 A DC 50 V 10 x I
N
2-pole 2.5 ... 16 A DC 50 V 250 A
2-pole 2.5 ... 16 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 ... 10 A AC 250 V 2,000 A, C, 1
1-pole, 2-pole 0.1 ... 16 A AC 125 V 1,000 A, C, 1
Degree of protection 
(IEC 60529)
Operating area
Terminal area
IP40 
with water splash protection IP65
IP00 
with water splash protection IP64
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 resistance  30 g (11 ms) 
    test to IEC 60068-2-27, test Ea
Corrosion  96 hrs in 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. 53 g (2-pole)
    approx. 50 g (1-pole) 
Technical data
Time/current characteristics
The time/current characteristic depends on the ambient temperature. In 
order to eliminate nuisance tripping, please multiply the current rating by a 
derating factor.
ambient tempera-
ture [°C]
-30 -20 -10 0 23 40 50 60
temperature factor 0.8 0.84 0.88 0.92 1 1.08 1.14 1.23
… times rated current
Trip time in seconds
… times rated current
0.1…2 A
2.5…16 A AC/DC
1)
Single or double pole load
12468102040
10000
1000
100
10
1
0.1
0.01
0.001
60 80 100
12468102040
10000
1000
100
10
1
0.1
0.01
0.001
60 80 100
Trip time in seconds
1)
Magnetic tripping currents are increased by 25% on DC supplies.
AC/DC
1)










