Mitsubishi Electric MS-T Series - Surge Absorber Installation

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3.3.3 Surge absorber
 The varistor (used in the coil , surge absorber , etc.) may emit smoke due to
deterioration. Make sure not to near the product during operation, and always use a
short-circuit protection device such as a fuse on the operating circuit.
 A surge will be generated from the contact and coil during switching. Avoid danger by
connecting a surge absorber, etc.
 Destruction or fires may occur if the surge absorber is used exceeding the rated
voltage.
(1) Types and applicable magnetic contactors
Types Applicable magnetic contactors
UT-SA21
UT-SA22
UT-SA23
UT-SA25
S-T10,S-T12,
S-T20,S-T21,
S-T25,SR-T5
(2) Applicable voltage range
Rated voltage
Recommend applicable
voltage range
Minimum applicable
voltage
Remarks
AC 48V
AC24～AC50V, DC24～60V
AC,DC12V UT-SA25
AC12V, DC12V
UT-SA21, UT-SA23, UT-SA25
(CR type UT-SA23 is exclusive for AC)
AC 200V
AC100～AC240V, DC100～220V
AC50V, DC60V UT-SA22
AC 400V
AC346～480V
AC12V UT-SA21
(3) Surge absorber mounting procedures
CAUTION
Installation
[Note]
Tighten the surge absorber
terminal with the coil terminal
Removing
Stick
1)
2)
C
li
c
k