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© 2019 Schneider Electric
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Contactor Accessories TeSys™ D Contactors
www.se.com/us
Refer to Catalog MKTED210011EN
RC and Varistor Coil Suppressors
LA4DA1U
RC Coil Suppressor
•
Limitation of transient voltage to 300% of nominal voltage maximum.
•
Oscillating frequency limited to 400 Hz maximum. Slight increase in drop-out time
(1.2–2 times normal).
Table 18.57: Resistor/Capacitor Circuit (RC) for Reduction of Electrical Noise in AC
Contactor Coils
Installed by Mounting on Operating Voltage 50/60 Hz
Catalog
Number
Snapping into the cavity on the right
side without tools [17]
LC●D09–D38 (3P),
LC1DT20–DT40 (4P)
24–28 Vac LAD4RCE
50–127 Vac LAD4RCG
110–240 Vac LAD4RCU
Snap-on mounting, and connection
without tools to the contactor coil
terminals
LC1D40A–65A (3P),
LC1DT60A–DT80A
(4P)
24-48 Vac LAD4RC3E
50–127 Vac LAD4RC3G
110–240 Vac LAD4RC3U
380–415 Vac LAD4RC3N
Screw connection to the contactor coil
terminals
LC●D80–D150 (3P),
LC1D80–D115 (4P)
24–48 Vac LA4DA2E
50–127 Vac LA4DA2G
110–240 Vac LA4DA2U
380–415 Vac LA4DA2N
Varistor Coil Suppressor
•
Limitation of transient voltage value to 200% of nominal voltage maximum.
•
Maximum reduction of transient voltage peaks. Slight increase in drop-out time (1.1–
1.5 times normal).
Table 18.58: Varistor (Peak Limiting) for Reduction of Electrical Noise in AC
Contactor Coils
Installed by Mounting on Operating Voltage
Catalog
Number
Snapping into the cavity on the right
side without tools [17]
LC●D09–D38 (3P),
LC1DT20–DT40 (4P)
24–48 Vac LAD4VE
50–127 Vac LAD4VG
110–250 Vac LAD4VU
Snap-on mounting, and connection
without tools to the contactor coil
terminals
LC1D40A–D65A (3P),
LC1DT60A–DT80A
(4P)
24–48 Vac/Vdc LAD4V3E
50–127 Vac/Vdc LAD4V3G
110–250 Vac/Vdc LAD4V3U
Screw connection to the contactor coil
terminals
LC●D80–D115 (3P)
LC1D80–D115 (4P)
24–48 Vac LA4DE2E
50–127 Vac LA4DE2G
110–250 Vac LA4DE2U
Screw connection to the contactor coil
terminals
LC●D80–D95 (3P)
LC1D80 (4P)
24–48 Vdc LA4DE3E
50–127 Vdc LA4DE3G
110–250 Vdc LA4DE3U
Diode Coil Suppressor
LA4DC3U
•
No overvoltage or oscillating frequency.
•
Polarized component. Increased drop-out time (6–10 times normal).
Table 18.59: Diode for Reduction of Electrical Noise in DC Contactor Coils
Installed on the upper part by Mounting on Operating Voltage, DC
Catalog
Number
Snap-on mounting and connection w/o
tools to the contactor coil terminals
LC●D09 to D38 (3P),
LC1DT20 to DT40 (4P)
24–250 Vdc LAD4DDL
Clip-on front mounting
LC●D40A to D65A
(3P),
LC1DT60A to DT80A
(4P)
24–250 Vdc LAD4D3U
Screw connection of wire to the
contactor coil terminals
LC●D80 to D95 (3P),
LC1D80 (4P)
24–250 Vdc LA4DC3U
18
CONTACTORS AND STARTERS-IEC
[17] Installing the suppressor into the cavity makes the electrical connection. Overall width of the contactor remains the same.
9/13/2019