Omron J7K-BMA-10-D24V 20A / 690VAC, 24VDC, 3x NO + 1x NO contactor *no cover plate*

Contactor allows to control large currents with small controlling current. Contactor is almost the same as relay or solenoid, but usually when speaking about contactors it refers to something larger than relay. Contactors auxiliary contacts may be used to create latch circuit or safety feature that for example prohibits activation of other contactor while in first is activated.

Contactor's most important technical information:

• Number of main contacts and type:
  • 3x NO (Normally open)
• Main contacts max current (I_th):
  • 20A
• Rated max motor power:
  • 115VAC
    • 1HP 1~
    • 2HP 3~
  • 200VAC
    • 2HP 1~
    • 3HP 3~
  • 230VAC
    • 2HP 1~
    • 3HP 3~
  • 460VAC
    • 7,5HP 3~
  • 575VAC:
    • 10HP 3~
• Utilization category (Unmarked classes = Manufacturer has not provided information or we just do not have that particular information):
  • AC-1, (I_th, I_u) Non-inductive or slightly inductive loads, example: resistive furnaces, heaters
    • 20A / 690VAC
  • AC-2, Slip-ring motors: starting, switching off
  • AC-3, Squirrel-cage motors: starting, switches off spinning motors
    • 12A / 3kW / 230VAC
    • 12A / 5,5kW / 400VAC
    • 12A / 7,5kW / 500VAC
    • 9A / 7,5kW / 690VAC
  • AC-4, Squirrel-cage motors: starting, plugging, inching
    • 8,7A / 2,2kW / 230VAC
    • 8,5A / 4kW / 400VAC
    • 9A / 5,5kW / 500VAC
    • 6,7A / 5,5kW / 690VAC
  • AC-5a, Switching of discharge lamps
  • AC-5b, Switching of incandescent lamps
  • AC-6a, Switching of transformers
  • AC-6b, Switching of capacitor banks
  • AC-7a, Slightly inductive loads in household appliances: examples: mixers, blenders
  • AC-7b, Motor-loads for household appliances: examples: fans, central vacuum
  • AC-8a, Hermetic refrigerant compressor motor control with manual resetting overloads
  • AC-8b, Hermetic refrigerant compressor motor control with automatic resetting overloads
  • AC-12, Control of resistive loads and solid state loads with opto-coupler isolation
  • AC-13, Control of solid state loads with transformer isolation
  • AC-14, Control of small electromagnetic loads (<72VA)
  • AC-15, Control of electromagnetic loads (>72VA)
  • AC-20, Connecting and disconnecting under no-load conditions
  • AC-21A, (I_e) Frequent switching of resistive loads, including moderate overloads
  • AC-21B, (I_e) Occasional switching of resistive loads, including moderate overloads
  • AC-22A, Frequent switching of mixed resistive and inductive loads, including moderate overloads
  • AC-22B, Occasional switching of mixed resistive and inductive loads, including moderate overloads
  • AC-23A, Frequent switching of motor loads or other highly inductive loads
  • AC-23B, Occasional switching of motor loads or other highly inductive loads
  • DC-1, Non Inductive or slightly inductive loads, resistance furnaces, heaters
    • <60VDC:
      • 20A
    • 110VDC:
      • 20A
    • 220VDC:
      • 15A
    • 440VDC:
      • 3A
  • DC-3, Shunt-motors, starting, plugging(1), inching(2), dynamic braking of motors
    • <60VDC:
      • 20A
    • 110VDC:
      • 20A
    • 220VDC:
      • 8A
  • DC-5, Series-motors, starting, plugging(1), inching(2), dynamic braking of motors
    • <60VDC:
      • 16A
    • 110VDC:
      • 16A
  • DC-6, Switching of incandescent lamps
  • DC-12, Control of resistive loads and solid state loads with opto-coupler isolation
  • DC-13, Control of electromagnetics
  • DC-14, Control of electromagnetic loads when having variable resistors in the circuit
  • DC-20A, Frequent connecting and disconnecting under no-load conditions
  • DC-20B, Occasional connecting and disconnecting under no-load conditions
  • DC-21A, Frequent switching of resistive loads, including moderate overloads
  • 25A (depends on the operating voltage and number of contacts in series)
  • DC-21B, Occasional switching of resistive loads, including moderate overloads
  • 25A (depends on the operating voltage and number of contacts in series)
  • DC-22A, Frequent switching of mixed resistive and inductive loads, including moderate overloads (i.e. shunt motors)
  • 25A (depends on the operating voltage and number of contacts in series)
  • DC-22B, Occasional switching of mixed resistive and inductive loads, including moderate overloads (i.e. shunt motors)
  • 25A(depends on the operating voltage and number of contacts in series)
  • DC-23A, Frequent switching of highly inductive loads (i.e. series motors)
  • 21A (depends on the operating voltage and number of contacts in series)
  • DC-23B, Occasional switching of highly inductive loads (i.e. series motors)
  • 21A (depends on the operating voltage and number of contacts in series)
• Number of auxiliary contacts and type:
  • 1x NO (normally open)
• Auxiliary contacts max current (I_th):
  • 16A
• Controlling voltage:
  • 24VDC
• Other circuit related specialties:
  • There is none
• Contacts max operating voltage:
  • 600VAC / 12A
• Max short circuit current (SCCR):
  • 5kA
• Mounting:
  • 35mm DIN rail / screw attachment through 4mm holes
• Contactor width:
  • 45mm
• Contactor's model marking:
  • 7K-BMA-10-D
  • 7K-BMA-10-D24V (D stands for DC control voltage)

Download Omron J7K and J7TK contactor system technical datasheet