Protects compressors and blower motors from adverse voltage conditions that can cause damage to the motor windings.

• Universal range from 190 to 480 V ac or 475 to 600 V ac and 50/60 Hz
• Transient protection meets IEEE and IEC standards
• Four adjustment pots provide versatility for a variety of applications
• Adjustable trip delay and restart delay
• Standard surface or DIN-rail mountable

Protects compressors and blower motors from adverse voltage conditions that can cause damage to the motor windings.

• Protection from low and high voltage, unbalance, single-phase, and reverse phase conditions
• LED diagnostics is quick visual indicator for cause of trip
• Adjustable trip delay to prevent nuisance tripping
• DPDT relay output

Provides all the same voltage/phase protection as the 460 model, but with three added advantages listed in the features section.

• Second set of voltage inputs for monitoring voltage on the load-side of the motor contactor to detect contact failure
• Keeps history of the past 20 fault causes
• Wirelessly download and view fault history

Protects compressors and blower motors from adverse voltage conditions that can cause damage to the motor windings regardless of size.

• Protection for low voltage, voltage unbalance, phase reversal, and harmful power line conditions
• Optional high-voltage monitoring

The LSRX/LSRX-C series is designed to energize the output contact whenever 4.5 Amps or greater is present. Used commonly as an ac current proof relay to indicate if a motor is operating.

• Self-powered
• Quick-connect terminals reduce installation time
• Built-in current sensor eliminates the need for a stand alone current transformer

Varies the effective resistance of its output in direct proportion to the current flowing in the conductor it is monitoring.

• Monitors 0 to 20 A
• Loop powered from 10 to 30 V dc
• Linear output from 4 to 20 mA

Positioned at the power distribution or branch circuit location, it safeguards components from power fluctuations or surges by limiting the fault current to a load or the unit being protected to prevent equipment damage or downtime.

• Capability to clamp and withstand high-energy transients to prevent disruption, downtime, and degradation or damage to equipment
• Thermal protection to eliminate catastrophic failure
• UL Recognized and IEC Compliant in one part number to reduce inventory and support global usage
• DIN-rail mounted and compact footprint to increase panel design flexibility
• An SPD type and voltage-coded plug to prevent module from being placed in wrong base, eliminating the risk of improper protection

Used to delay the blower from turning on, in a heating/cooling system, to allow time for the system to reach temperature before forcing air through the ventilation ducts. Also used to stagger start for multiple compressors within a facility, on start up or after a power outage.

• Universal ac/dc operating voltage
• Two terminal series connection with the load
• Solid state prevents arc and wear over time
• Encapsulated to protect against shock vibration

Used to delay the blower from turning off, in a heating/cooling system, after the demand has been met to allow all of the conditioned air to be forced out of the ventilation ducts.

• 24 to 120 V ac input voltage
• User selectable time delay
• Solid state prevents arc and wear over time
• Encapsulated to protect against shock vibration

The CT series timers combine a delay-on-make and delay-on-break time delay into one unit and may be used to control fan delays in heating and/or cooling equipment.

• Delay-on-make and delay-on-break in one unit
• Voltage 24 V ac input voltage
• Solid state prevents arc and wear over time
• Encapsulated to protect against shock vibration

A multifunction universal time-delay relay. Six timing functions include delay-on-make, interval, single shot, recycling (ON time first, equal recycle delays), delay-on-break, and retriggerable single shot.

• Universal input voltage
• Knob adjustable time delay
• LED indicators provide visual indication of input voltage and relay status

Littelfuse UL fuses protect your system from overload and short circuit. Littelfuse fuses are chosen over breakers due to their higher amperages, quicker response time, easy coordination, and no calibration required.

• Compact design is ideal for space saving protection
• High-interrupting capacity and excellent current-limitation

Littelfuse UL fuses protect your system from overload and short circuit. Littelfuse fuses are chosen over breakers due to their higher amperages, quicker response time, easy coordination, and no calibration required.

• High short-circuit current rating
• Dual-element design
• Available with and without indication

Littelfuse UL fuses protect your system from overload and short circuit. Littelfuse fuses are chosen over breakers due to their higher amperages, quicker response time, easy coordination, and no calibration required.

• Extremely current-limiting
• 200 kA interrupting rating

Littelfuse UL fuses protect your system from overload and short circuit. Littelfuse fuses are chosen over breakers due to their higher amperages, quicker response time, easy coordination, and no calibration required.

• Superior time-delay and cycling characteristics
• Available with and without indication

Cost-effective, predictable temperature sensor that enables tighter operating control and diagnostics to achieve energy savings and optimal performance of systems.

• Exponential resistance-temperature curve
• Wide operating temperature ranges from -50° C to 300° C
• Metal oxide ceramic compounds

Robust, extremely stable and predictable temperature sensor suitable for a wide range of temperatures that enables tighter operating control and diagnostics to achieve energy savings and optimal performance of systems.

• Nearly linear resistance-temperature curve provides ease and consistency of measurement
• Extremely wide temperature ranges, specifically on the higher end, from -50° C to well above 500° C
• Precious metal (typically Pt) on ceramic substrate