Datasheet

5
Accessories and ordering data
1. Surge suppressor
It is used to reduce the effect of switching overvoltages created
during the opening of inductive circuits. Typically they are
mounted outside the body of the contactor relay, and are
connected in parallel with the coil terminals. Various
techniques for the suppression of switching overvoltages can
be employed. For example: RC element, Varistor etc
Surge Suppressor (Varistor)
Coil voltage
MLFB
Std. pkg.
AC DC
(nos.)
24 - 48 V 24 - 70 V 3TX7 402-3GY1
48 - 127 V 70 - 150 V 3TX7 402-3HY1
127 - 240 V 150 - 250 V 3TX7 402-3JY1 10
240 - 400 V – 3TX7 402-3KY1
400 - 460 V – 3TX7 402-3LY1
Surge Suppressor (RC Element)
Coil voltage
MLFB
Std. pkg.
AC DC
(nos.)
24 - 48 V 24 - 70 V 3TX7 402-3RY2
48 - 127 V 70 - 150 V 3TX7 402-3SY2
127 - 240 V 150 - 250 V 3TX7 402-3TY2 10
240 - 400 V – 3TX7 402-3UY2
400 - 460 V – 3TX7 402-3VY2
Dimensional drawings
3TH30 - 0A
3TH30 - 0B
c Auxiliary Contact Block
d Identification tag
Varistor
RC element
2. Add on blocks
Auxiliary Contact Block Type Reference Std. pkg. (nos.)
1NO 3TX40 10 2A
1NC 3TX40 01 2A
10
1NO extended 3TX40 10 4A
1NC extended 3TX40 01 4A
Extended contacts (NO/NC) is early make NO and late break NC
combination.
Useful technical information
Variety of connections for DC applications