Datasheet
Thermal Overcurrent Circuit Breaker 1658-...
www.e-t-a.de
 3
 1
1908
Thermal Overcurrent Circuit Breaker 1658-...
ø15
0.4
14.3
0.5
3/8-27UNS-2B
2.5
3
3/8-27UNS-2B
P
R
E
S
S
T
O
R
E
S
E
T
E
-
T
-
A
®
B
R
E
A
K
E
R
ø21.4
ø9.9
PAL nut 3/8", 27-thread
Y 306 671 01
Knurled nut 3/8", 27-thread
plastic (standard)
Y 307 117 02
Press to Reset Plate for 3/8"
thread, aluminium
Y 301 059 02
.563
.020
.098
.118.591
.843
.016
.390
2.5
3/8-27UNS-2B
ø13
Knurled nut 3/8", 27-thread
nickel-plated brass
Y
 300 190 03
.512 .098
3/8-27UNS-2B
SW14
Hex nut 3/8", 27-thread
nickel-plated brass
Y 300 192 01
2.5
.551
.098
Accessories
This is a metric design and millimeter dimensions take precedence ( 
mm 
) 
inch
3/8-27 UNS-2B
3/8-27 UNS-2B
Reset button seal for 3/8", 27-thread,
short
X
 201 285 01 (IP64)
long
X 200 799 01 (IP64)
All dimensions without tolerances are for reference only. In the interest of improved design, 
performance and cost effectiveness the right to make changes in these specifications 
without notice is reserved.Product markings may not be exactly as the ordering codes. 
Errors and omissions excepted.
Approvals
Panel cut out
Ø 9,6
9
1658-3/8-27 UNS-2A
Authority  Standard Rated  
voltage
Current 
ratings
Approval 
mark
1658-G
VDE IEC/EN 
60934
AC 240 V
DC 28 V
5 A…25 A 
5 A…25 A
UL UL 1077
CSA C22.2 
No 235
UL 1500
Ignition 
Protected
AC 240 V
DC 32 V
5 A…30 A 
5 A…30 A
CSA CSA C22.2 
No 235
AC 240 V
DC 32 V
5 A…30 A 
5 A…30 A
1658-A
VDE IEC/EN 
60934
AC 240 V
DC 28 V
5 A…25 A 
5 A…25 A
UL UL 244A AC 125 V
DC 28 V
5 A…30 A 
5 A…30 A



