NO - DP - ST

The SU190 is an up-rated variant of the SW190 Series of contactor primarily designed to switch heavy duty D.C. loads, however it is also capable of switching A.C. loads.  The SU190 is suitable for switching Resistive, Capacitive and Inductive loads.  Typical applications include electric motors, hydraulic power packs, winches, speed controllers and Power Distribution Systems.

The contactors feature double pole, double breaking main contacts with silver alloy tips, which are weld resistant, hard wearing and have excellent conductivity.  The SU190 is easy to install, with M5 tapped holes in the switch frame or a variety of optional brackets available.  Electrical connections follow industry standards, with M10 main terminal studs and an option for either 6.3mm standard spade terminals or flying leads on the coil assembly.  Mounting can be vertical or horizontal, when vertical the M10 contact studs should point upwards.  If the requirement is for downwards orientation we can adjust the contactor to compensate for this.

SU190 Technical Information

InterruptedRating ( Ith )Uninterrupted
Thermal Current Rating 250A 350A
Intermittent Current Rating:
30% Duty 455A 640A
40% Duty 395A 555A
50% Duty 355A 495A
60% Duty 325A 450A
70% Duty 300A 420A
Rated Fault Current Breaking Capacity (Icn) 5ms Time Constant: (In accordance with UL583*)
Blowouts 1500A at 96V D.C.
No Blowouts 1500A at 48V D.C.
Rated Fault Current Breaking Capacity (Icn) Resistive Load: (In accordance with UL508*)
Blowouts 525A at 96V D.C.
No Blowouts 525A at 60V D.C.
Maximum Recommended Contact Voltages
Blowouts 250V 250V
No Blowouts 96V 96V
Typical Voltage Drop per pole across New Contacts at 250A 40mV

Mechanical Durability > 3,000,000 Cycles
Coil Voltage Available (Us) (Rectifier board required for A.C.) 6 - 240V

SU190 Features

Component Configurations
Coil Suppression
Coil Terminations

SU190 Resources

SU190 Data Sheet

  • Format: .pdf
  • Size: 951kb

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  • The SU190 has the following optional components available: