Corporate| Railway | Industry

Vapor relays & contactors

Designed, Tested and Proven for Critical Applications

From rail passenger cars and locomotive control and starting circuits to earth moving
equipment, Vapor relays and contactors have established a reputation for quality and reliability where dependable control of DC circuits is required. Performance-proven in thousands of applications worldwide, Vapor relays and contactors meet or exceed stringent qualification requirements of major locomotive and rail passenger car builders and heavy machinery manufacturers.
Units are in daily service on U.S. Class 1 railroads, the New York City Transit Authority, the Chicago Transit Authority, the Toronto Transit Commission and other railroads and transit agencies around the globe.

Extended Service Life

Vapor designs incorporate the highest quality components and materials to provide long life with minimum maintenance. Control relays provide from 1 to 2 million cycle load life and 10 million mechanical cycles. Contactors provide up to 5 million mechanical cycles.

Shock and Vibration

All products have been designed for an extended service life on moving equipment, and will withstand continuous conditions
of shock and vibration.

Custom Designs

A wide selection of standard relays and contactors is available. In addition, Vapor can design and manufacture units to meet
specific requirements.

Minimum Maintenance

Rugged enclosures, accessible designs, quality materials and controlled manufacturing processes all contribute to minimizing
maintenance problems and expense.

Compact, Lightweight Units

As units are engineered for a particular purpose, application and/or specification, they represent the lightest, most compact
design possible.

Computerized Testing

All relays and contactors are thoroughly tested during the manufacturing process using computerized test equipment. Electronic records verify the specification compliance
of every unit.
Passenger rail car control panel
Locomotive control panel


DC Relays and Contactors for high reliability and long life

Control Relays

for general control circuits, small motors, solenoids, alarm circuits, switching circuits and safety equipment.


Time Delay Relays

for delay intervals of second or minutes. Hybrid electromechanical designs.

Latching Relays

for alarm and signal circuit supervision with manual or electrical reset.

Medium and Heavy Duty Contactors

for motors, lighting, multiple solenoid circuits, heating, motor starting, battery charging, signal and alarm circuits, motor and generator field control.


2-Pole Relay
4-Pole Relay
6-Pole Relay
Medium-duty Contactor
Starting Contactor
12-Pole Relay


Explore the product portfolio

Mors Smitt Group worldwide

Regional sales offices
Mors Smitt B.V.
Vrieslantlaan 6
3526 AA Utrecht
The Netherlands
T: +31 30 288 1311
Mors Smitt Asia Ltd.
21/F., 9 Des Voeux Road West
Sheung Wan, Hong Kong
T. +852 2343 5555
RMS Mors Smitt
6 Anzed Court
Mulgrave,VIC 3170
T: +61 (0)3 8544 1200
Mors Smitt France SAS
2 Rue de la Mandinière
72300 Sablé-sur-Sarthe
T: +33 243 92 8200

Mors Smitt Technologies Inc.
1010 Johnson Drive
Buffalo Grove, IL 60089-6918
T. +1 847 777 6497
Mors Smitt UK Ltd.
Graycar Business Park
Barton under Needwood
Burton on Trent
DE13 8EN
United Kingdom
T: +44 1283 722650
Local sales & support offices
Mors Smitt Sales & Support - Brazil
Sao Paolo, Brazil
Mors Smitt Sales & Support - Gulf Region
Abu Dhabi, United Arab Emirates
Mors Smitt Sales & Support - Malaysia
Kuala Lumpur, Malaysia
Mors Smitt Sales & Support - China
Zhongshan, P.R. China
Mors Smitt Sales & Support - India
Bangaluru, India

© Mors Smitt 2018

Your feedback is valuable for us