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Siemens 3RT2018-2XB42-0LA2 Traction Contactor – 24-34V DC

Siemens 3RT2018-2XB42-0LA2 Traction Contactor, 16A, 24-34V DC, solid-state.

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ManufacturerSiemens

Part number3RT2018-2XB42-0LA2

Type Traction Contactor

AC-3e/AC-3 Rating 16A

Power 7.5 kW / 400 V

Poles 3

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Traction rated AC-3e/AC-3 16A current 7.5kW power 24-34V DC coil Solid-state mechanism Integrated varistor 1 NC auxiliary contact

Product description

The Siemens 3RT2018-2XB42-0LA2 is a specialized 3-pole traction contactor for AC-3e/AC-3 applications, rated at 16A and 7.5 kW at 400V. It features a robust 24-34V DC coil with a solid-state operating mechanism and an integrated varistor for surge protection. This model includes one normally closed (NC) auxiliary contact, spring-loaded terminals, and is size S00.

Designed for demanding traction applications, this contactor offers enhanced reliability, precise control, and protection against electrical disturbances common in mobile and railway environments.

Stanlo Automation, a veteran-owned distributor, provides the Siemens 3RT2018-2XB42-0LA2 traction contactor. We are dedicated to supplying quality surplus industrial automation parts to keep your specialized equipment running.

Technical specifications

Type	Traction Contactor
AC-3e/AC-3 Rating	16A
Power	7.5 kW / 400 V
Poles	3
Coil Voltage	24-34 V DC (0.7-1.25* Uc)
Operating Mechanism	Solid-state
Integrated Varistor	Yes
Auxiliary Contacts	1 NC
Terminals	Spring-loaded
Frame Size	S00

Common applications

Railway vehicles

Electric locomotives

Tramways

Traction systems

Industrial vehicles

Compatible systems

Designed for DC control circuits in traction systems; consult Siemens documentation for specific vehicle or system compatibility.

Also known as

Siemens Traction Contactor S00 Siemens DC Contactor 24V 3RT2018-2XB42

Replaces / compatible with

This traction-grade contactor is designed for specialized applications and may replace other Siemens contactors in high-vibration or demanding DC control environments.

Technical note

Expert tip

The 0.7-1.25* Uc operating range indicates the coil voltage flexibility for reliable switching under varying conditions typical in traction power supplies.

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Frequently asked questions

What makes the Siemens 3RT2018-2XB42-0LA2 suitable for traction applications?

The Siemens 3RT2018-2XB42-0LA2 features a solid-state operating mechanism and is built to withstand the vibrations and electrical demands of traction systems. It includes a varistor for surge protection and is specifically designed for reliable operation in these challenging environments.