Datasheet
www.e-t-a.de
12
3120-N...-...T1-... Thermal Circuit Breaker
1930
 1
X3120-B
X3120-A
Description – X3120-A/-B appliance inlet module
Typical applications
The X3120 appliance inlet module with 3120-N5.6 circuit breaker 
type combines up to four functions within a single component: C14/
C20 inlet plug, an ON/ OFF switch, resettable overcurrent protection 
and a line filter. Screw-type mounting from the front or from the rear. 
Electrical medical apparatus, laboratory equipment, professional 
audio equipment and office machines.
Order numbering code
Approvals
Type No.
X3120  appliance inlet module for circuit breaker type 3120-N
  Module
 A  inlet plug C14 (with filter)
 B  inlet plug C20 (without filter)
 Mounting method
    04 screw-type mounting
   Filter
   00 without
   01 standard line filter
   03 standard line filter for medical equipment
   06 high-power line filter for medical equipment
    Filter rating
    00     without
     01     1  A
    03     3  A
    06     6  A
    08     8  A
    10     10  A
    12     12  A
    15     15  A
     Version
     01   not wired, mounting position 3120-N:  
OFF position at connector
     11    wired; mounting position 3120-N: 
OFF position at connector
       Supply status
       M  module supplied with mounted 3120-N 
circuit breaker and filter (module A)
X3120- B  04 00  00  01   M  ordering example
All information and data given on our products are accurate and reliable to the best of our 
knowledge, but E-T-A does not accept any responsibility for the use in applications which are 
not in accordance with the present specification. E-T-A reserves the right to change specifi-
cations at any time in the interest of improved design, performance and cost effectiveness, 
Dimensions are subject to change without notice. Please enquire for the latest dimensional 
drawing with tolerances if required. All dimensions, data, pictures and descriptions are for 
information only and are not binding. Amendments, errors and omissions excepted. Ordering 
codes of the products may differ from their marking.
X3120-A – C14 inlet plugs
Approval 
authority 
Standard Voltage ratings Max. rated 
current
ENEC
IEC/EN 60320-1
AC 240 V 10 A
UL/CSA
UL 498
AC 250 V 15 A
CQC CCC AC 250 V 10 A
X3120-A - filter
Design to UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939
X3120-B – C20 inlet plugs
Approval 
authority 
Standard Voltage ratings Max. rated 
current
ENEC
IEC/EN 60320-1
AC 240 V 16 A
UL/CSA
UL 498
AC 240 V 20 A
Selection of filter rating
Current rating of 
circuit breaker
 Min. rating of filter
0.1 ... 1 A 1 A
1.2 ... 3 A 3 A
3.5 ... 6 A 6 A
7 ... 8 A  8 A
9 ... 10 A 10 A
12 A 12 A
14 ... 15 A 15 A
The 3120-N5.6 thermal circuit breaker protects the line filter in the 
event of an overload. 
For protection of the filter in the event of higher overcurrents, 
we recommend 3120-N circuit breaker with thermal-magnetic trip 
(3120-N...-M1...). 
Further technical information p 19 ff.










