AC Current Switches
CS-400/SC-500


  • Auto-ranging eliminates lost jumpers
  • Self-powered and no insertion loss
  • True digital switching and no leakage
  • Small compact size
  • Easy field adjustment with status LED's
  • Input / Output isolation via current transformer
  • Solid-state reliability
  • Solid, reliable mounting method






The CS-400 / SC-500 series of AC current switches are solid-state switches that activate a contact closure whenever the monitored primary circuit current exceeds a pre-set level. Several models are available to switch various load types as indicated in the Product Ordering Chart. Several models feature integral LED's to indicate device power and also the switch status. Most switch models include a multi-turn adjustment to set the trip threshold to the desired value and the GnG model operates as a go/no-go status indicator with a factory set minimum threshold value. The switches can monitor up to 200 Amps continuous and feature an auto-range circuit to eliminate manual jumpers. All models are CSA certified, UL approved and CE compliant.



Power Supply: None -Self-powered
Enclosure Size
(H x W x D):
Solid Core -49 x 87 x 25 mm
Split Core -70 x 87 x 30 mm
Input Frequency Range: 10-400Hz
AC Conductor Hole:
Solid Core - 20mm
Split Core - 19 x 24mm
Setpoint Range:
1-200 Amps for CS models, 1.5-200 for SC models, GNG model fixed at 1, GNG-L model fixed at 0.5.
CS/SC-325 and CS/SC-325-NS:
Jumper           Amp Range
Low (none)           1-6
Medium               6-40
High                  40-200
Enclosure Material:
UL 94V-0 flammability rated ABS
Hysteresis: < 2% FS max
Certification: CSA-C, CSA-US, CE
Response Time: < 200 mS
Wiring Connections: Solid Core -Barrier strip
Split Core -Screw terminals (14 to 22 AWG)
Operating Temperature: 0 to 70 (32 to 158 F)