3RT2037-3KB40

Siemens 3RT2037-3KB40 contactor, SIRIUS 3RT2 series S2, 3 pole, AC-3 rated 65A, 30kW (400V), control voltage 24VAC, with 1NO+1NC auxiliary contacts, insulation 690V, operating temperature -25°C to 60°C.

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Siemens 3RT2037-3KB40 contactor 24VAC/65A

Product Positioning

The Siemens 3RT2037-3KB40 contactor is a SIRIUS 3RT2 series S2 size, 3-pole design, AC-3 rated current 65A, 30kW (400V), suitable for starting and switching control of medium-sized three-phase motors. The Siemens 3RT2037-3KB40 uses a 24VAC low-voltage control voltage, equipped with 1 NO + 1 NC auxiliary contacts, insulation voltage 690V, operating temperature range -25°C to 60°C, and the main circuit uses screw terminal wiring. It has passed multiple international certifications including UL, EAC, CSA, and CCC.

Core Product Advantages and Features

S2 size 3-pole main contactor

AC-3 rated current 65A, 30kW (400V), suitable for starting and switching of medium-sized motors.

24VAC low-voltage control

Reduce control loop voltage to improve operational safety and compatibility.

1NO+1NC auxiliary contact

690V insulation voltage provides basic interlocking and status feedback signals.

Wide temperature range screw terminal design

Operating temperature range: -25°C to 60°C. Certified by UL, EAC, CSA, and CCC.

project	Specification
Rated current (AC-3)	65A
Rated power	30kW (400V)
Extreme number	3 poles
Control/coil voltage	24VAC
Auxiliary contact configuration	1NO+1NC
Insulation voltage	690V
Operating temperature range	-25°C to 60°C
External dimensions	114×55×130 mm
Terminal type	Screw terminals
Applicable series/sizes	SIRIUS 3RT2, Size S2
Certification	UL, EAC, CSA, CCC

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