Effective & Reliable
Protection for Pumps

Pumps are frequently exposed to hazardous conditions and situations that can cause severe damage to your pump system. Littelfuse PumpSaver® products will protect and disable your pump in these situations. Plus, this line offers a wide variety of control options for both single phase and three phase applications. Rugged and reliable, these products are ideal for all your pump protection needs.





Enhanced Power Monitors

The revolutionary MP8000 Bluetooth® Enabled Overload Relay communicates directly with your smart phone via Bluetooth®. No need to open the control panel. Monitor and control unlimited relays through the Littelfuse App from a safe distance via your smartphone or tablet.



Many pumping applications require advanced power monitoring and control. Littelfuse enhanced power monitors provide protection and features you expect from enhanced overload relays, and are specifically designed to support all of your low horsepower and/or low speed motor applications.

Click the link below to view datasheet:

 52ff0e80b07d28b590bbc4b30befde52 77C-KW/HP  52ff0e80b07d28b590bbc4b30befde52 77C-LR-KW/HP
 52ff0e80b07d28b590bbc4b30befde52 777-575-KW/HP-P2 52ff0e80b07d28b590bbc4b30befde52 777-MLR-KW/HP-P2
 52ff0e80b07d28b590bbc4b30befde52 777-LR-KW/HP-P2 52ff0e80b07d28b590bbc4b30befde52 777-HVR-KW/HP-P2 
 52ff0e80b07d28b590bbc4b30befde52 777 AccuPower  52ff0e80b07d28b590bbc4b30befde52 777- KW/HP-P2



Intrinsically Safe Relays

Applying electronic controls in hazardous environments can be difficult. Fortunately, Littelfuse intrinsically-safe relays and pump controllers are designed to interface between hazardous and non-hazardous areas. We also offer a variety of models with distinct output relay configurations to meet your unique system requirements.

Click the link below to view datasheet:

 52ff0e80b07d28b590bbc4b30befde52 ISS-100  52ff0e80b07d28b590bbc4b30befde52 ISS-101
 52ff0e80b07d28b590bbc4b30befde52 ISS-102A-LC  52ff0e80b07d28b590bbc4b30befde52 ISS-102AA-DCS
 52ff0e80b07d28b590bbc4b30befde52 ISS-102ACI-MC  52ff0e80b07d28b590bbc4b30befde52  ISS-105
52ff0e80b07d28b590bbc4b30befde52  ISS-105-ISO  52ff0e80b07d28b590bbc4b30befde52 ISS-102C-M-LC
52ff0e80b07d28b590bbc4b30befde52 ISS-102CCI-M-MC  


Alternating Relays

Alternating relays are designed to balance the run time between two independent loads that are typical in many pumping and compressor applications. This ensures that redundant equipment is equally exercised and your system runs reliably.

Click the link below to view datasheet:

 52ff0e80b07d28b590bbc4b30befde52 ALT  52ff0e80b07d28b590bbc4b30befde52 ALT-XXX-1-SW
 52ff0e80b07d28b590bbc4b30befde52 ALT-XXX-3-SW  52ff0e80b07d28b590bbc4b30befde52 50R-400-ALT


Pump Controller Relays

Multiple-pump applications often require balanced run times and redundancy. Littelfuse provides pump controllers (both intrinsically safe and non-IS) that are designed to handle multiple pump applications.

Click the link below to view datasheet:

 52ff0e80b07d28b590bbc4b30befde52 PC-105 52ff0e80b07d28b590bbc4b30befde52 ISS-105


Liquid Level Controls /
Seal Leak Detectors

Using either float or conductance probes, Littelfuse offers relays that control conductive liquid pumping operations ideal for both your pump-up or pump-down applications. Plus, our seal leak and leak/temp relays provide protection against seal leaks and over-temperature by monitoring sensors within the pumps and providing early warning or disabling the pumps.

Click the link below to view datasheet:

 52ff0e80b07d28b590bbc4b30befde52 460-15-100-LLS  52ff0e80b07d28b590bbc4b30befde52 PC-102CICI-DL
 52ff0e80b07d28b590bbc4b30befde52 PC-102CICI-LT  52ff0e80b07d28b590bbc4b30befde52 PC-XXX-LLC-CZ
 52ff0e80b07d28b590bbc4b30befde52 PC-XXX-LLC-GM  52ff0e80b07d28b590bbc4b30befde52 201-100-SLD
 52ff0e80b07d28b590bbc4b30befde52 460-15-100-SLD  


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Interested in learning more about our Pump Protection Relays? A variety of resources are available to download by clicking the links below.