Definite Purpose Contactors

Class 45 and Class 42 DP Contactors

Class 45 and Class 42

Siemens Class 45 and Class 42 Definite Purpose (DP) Contactors are back by popular demand! They can be ordered using our original part numbers for easy, direct replacement in fit, form, and function for all common DP contactor applications. The DP Contactor was developed for applications such as HVAC, refrigeration, fans, blowers and welders for OEMS and manufacturers of machinery. However, the market for DP contactors has grown to include many more commercial, construction and industrial applications

Technical Information on Definite Purpose Contactors

Industry Mall

Siemens DP Contactor Features:

Advanced Features are standard for the entire DP Contactor Family

Class 45 and 42 DP Contactors have industry standard mounting but they offer so much more.  The Siemens DP Contactors with their compact sizing save space allowing for smaller panels, more wiring room, and easy retrofits.  The quick connect for power and control wires reduce installation and retrofit times.  In order to reduce maintenance, provide longer life, and improve performance the Siemens DP Contactor family has a fully encapsulated body to reduce the penetration of dust and other contaminants.  Other features include visual contact position indication, weld-resistant silver cadmium oxide contacts, Class F coil insulation and quiet operation.  

DP Flyer for easy and quick selection

Definite Purpose Quick Selector

Class 45

1 and 2 pole Applications

Class 45 DP contactors:  1 and 2 pole Applications

Siemens DP Class 45 Contactors have the advanced features that are standard across the family.  These advanced features include the compact sizing, quiet operation, an encapsulated body and coil, visual contact position indication, weld-resistant silver cadmium oxide contacts, Class F coil insulation and quick connect power terminations.  In addition to the standard features, the Class 45 have the following features:

  • 1 pole shunt bar standard
  • Screw terminations on 30 amp
  • Lug terminals on 40 amp
  • Quad quick connects

Class 42

2 and 3 pole Applications

 Class 42 DP Contactors:  2 pole and 3 pole Applications

Siemens Class 42 Contactors have the same advanced features that are standard across the DP Contactor family such as quiet operation, compact sizing, completely enclosed body and coil, visual contact position indication, power termination quick connects( for 30A screws, 40A and above box lugs), weld-resistant silver cadmium contacts, and Class F coil insulation.  Features that are specific to the Class 42 DP Contactors are:

• 2-pole in 30 and 40 amps

• 3-pole in 30 to 90 amps

• Snap-on auxiliary contacts

  • Replacement coils