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Weg
CWBN00-11-30V24
NEMA Contactor, 9 Amp (9A), 1NO/1NC Auxiliary Contacts, 3NO Power Pole, 208-240VAC, 50/60Hz, Screw Terminal, 78.4 x 45 x 134.6mm (3.09 x 1.77 x 5.30"(HWD)
$47.48$47.48 -
Weg
CWC07-10-30L02
Mini Contactor, 7 Amp, 1NO Auxiliary Contacts, 3NO Power Poles, 12VDC (LC), Screw Terminal, IP20, 2.28" x 1.77" x 2..05" (HWD), CWC Series
$21.76$21.76 -
Weg
CWCA0-04-00C06
Mini Contactor Control Relay, 10 Amp, No Main Contacts, 42VDC, Screw Terminal, IP20, 2.28 x 1.77 x 2.05" (HWD), CWC Series
$20.71$20.71 -
Weg
CWM18-00-20V04
Contactor, IEC, 18 Amp (18A), 2NO, 20V 50Hz/24VAC 60 Hz, Screw Terminal, 81 x 45 x 87mm (3.19 x 1.77 x x 3.43"), IP20, CWM Series
$36.87$36.87 -
Available Now! 
Available Now!Weg
CWM18-01-30V18
Contactor, IEC, 18 Amps, 1NC, 120VAC, 3-Pole, UL508, Use RW Overload Relay
$47.97$47.97 -
Weg
CWM18-10-30V56
IEC Contactor, 18 Amp (18A), 3 Pole, 3NO, 600VAC, UL508, Screw Terminal, 81 x 45 x 87mm (3.19 x .77 x 3.43") (HWD), IP10 Main Circuit, IP20 Control Circuit, Use RW Overload Relay
$47.97$47.97 -
$102.48$102.48 -
$128.12$128.12 -
$104.81$104.81 -
Weg
CWM630-22-30E39
Contactor, IEC, 630 Amps, 2NO/2NC, 200-240VAC/DC, 3-Pole, UL508, Use RW Overload Relay
$2,051.60$2,051.60 -
Available Now! 
Available Now!Weg
CWM65-00-30V04
Contactor, IEC, 65 Amps, 24VAC, 3-Pole, UL508, Use RW Overload Relay
$69.62$69.62 -
$189.46$189.46
A motor starter is a contactor plus an overload relay; without an overload it is just a contactor.
A motor starter starts and stops a connected motor load and will provide protection in case of a sudden loss of power or if the motor overloads. A contactor is similar to a relay (but can handle larger amounts of electrical power and handle higher voltage loads) and is used for switching current on and off in a circuit. Contactors are used to control electrical loads and motors without providing overload protection.
a.k.a. motor starter, IEC contactor, dp contactor, thermal overload relay, motor protectors