Littelfuse, Inc. Datasheets for Current Sensors

Current sensors measure AC and/or DC current levels. They receive current inputs and provide outputs as analog voltage signals, analog current levels, switches, or audible signals.
Current Sensors: Learn more

Product Name Notes
Box cover units provide an economical method of protecting small motors against overcurrent damage. For use with Edison-Base plug fuses (TOO, TLO) or Type S plug fuses (SOO, SLO) with...
Current SensorCurrent sensor used to detect ground-fault current.
Current Sensors detect the current(Voltage, Temperature sensing for alternative selection) that flow through xEV systems, such as Battery Charger System, Battery system, Power Distributor System, Inverter System, Converter System. Applications:...
Current Transformer for low-level ground faults, flux conditioner is standard. (30-A primary).
Current Transformer for low-level ground faults, flux conditioner is standard. (30-A primary)
Detects phase current or ground-fault current. (200-A primary)
Obsolete 5/26/16. Current transformer for measuring ground-fault current.
Protects the EFCT input on the SE-701, SE-703, MPU-32, and FPU-32 when a current transformer other than the EFCT-1, EFCT-2, or EFCT-26 is used.
Replaced by SE-CS30-26 Series - Current Transformer Current Transformer for low-level ground faults, flux conditioner is standard. (30-A primary)
Replaced by SE-CS30-70 Series - Current Transformer Current Transformer for low-level ground faults, flux conditioner is standard. (30-A primary)
Sensitive current transformer used to detect ground-fault current. (5-A primary)
The DCSA Series is a loop-powered, linear output current transducer that provides an output that is directly proportional to the RMS AC current passing through the LCSC10T12 sensor. The DCSA...
The ELCT series is a sensitive current transformer with integrated flux conditioner used with Littelfuse relays to detect low levels of earth-leakage current.
The LSR-0 is a self-powered load sensor intended for use as a proof relay. It is used to verify that current is flowing as intended. It has a guaranteed 15A...
The LSR-XXX load sensors use current levels to determine feed rates, tool wear, loss of prime on pumps, mixer viscosity and all types of overload and underload conditions. They may...
The LSRU is a microcontroller-base d family of load sensors. The LSRU family of products employ three basic types of control logic: motor control logic, alarm logic and feed control...
The LSRX is an AC current sensor designed to energize the output contact whenever 4.5 Amps or greater is present. The LSRX is used commonly as an AC current proof...
The SE-CS10 series current transformers (CTs) are key components of the Littelfuse protection relay product line. Littelfuse SE-134C and SE-135 Ground-Fault Ground-Check Monitors are designed specifically for use with the...
The SE-CS40 series is a current transformer used with Littelfuse relays to detect earth leakage current.
The TCS Series is a low cost method of go/no go current detection. It includes a solid-state output to sink or source current when connected directly to a standard PLC...
The TCSA Series is a loop-powered, linear output current transducer that provides an output that is directly proportional to the RMS AC current passing through the onboard toroid. The TCSA...
The ZSCT series is a current transformer used with Littelfuse relays to detect low levels of earth-leakage current.