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  • Littelfuse
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Littelfuse
The ALT alternating relays are used to alternate between two loads. The ALT is commonly used in duplex pumping applications to balance the runtime of both pumps. The ALT-S is used in single high-level float applications. When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes. All ALT relays have a built-in debounce feature that prevents the relay from changing state if the switch or float contact bounces momentarily. The ALT-X has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats. The pumps alternate as in the ALT-S version but the crossconnected relay configuration allows both pumps to run simultaneously when both the lead and lag floats are closed. These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes. In the case of the ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed. Must use the OT08PC socket for UL Rating!
MFR: Littelfuse
MFR #: ALT-115-S-SW
UPC: 079458991314
Item #: 1382862
Available to Order
Phone: 1-855-999-2372 Email Contact Us
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Littelfuse
Solid State Timer
MFR: Littelfuse
MFR #: KSDB314SP
UPC: 079458995565
Item #: 150727
In Stock -
$231.45 each
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Littelfuse
Ground Fault Ground-Check Monitor
MFR: Littelfuse
MFR #: SE-105
UPC: 079458188233
Item #: 454484
Available to Order
$5565.63 each
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Littelfuse
Gf/Gc Term Assembly 5.6V 50W Tc
MFR: Littelfuse
MFR #: SE-TA6A
UPC: 079458989540
Item #: 531235
Available to Order
$1949.48 each
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Littelfuse
Used On Systems Up To 1 kV.
MFR: Littelfuse
MFR #: ER-600VC
UPC: 079458977950
Item #: 450698
Available to Order
$1681.03 each
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PILZ
Contact Expansion, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 8 N/O, 1 N/C, UB = 110 -120 VAC, 90mm
MFR: PILZ
MFR #: 774143
Item #: 180000
Available to Order
$640.50 each
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PILZ
PNOZsigma Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, Manual/Automatic Start, 3 N/O, 1 N/C, 1 SC, UB 24 V DC, 22.5 mm, Plug-in Screw Terminals, Monitoring of E-STOP, Safety Gates, Light Guard
MFR: PILZ
MFR #: 750104
Item #: 519846
Available to Order
$463.50 each
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 3 N/O, 1 N/C, 1 SC, Automatic/Monitored Start, UB 24 V AC/DC, 45 mm, Screw Terminals Integrated, Monitoring of E-STOP, Safety Gates
MFR: PILZ
MFR #: 774310
Item #: 180711
Available to Order
$546.00 each
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PILZ
PSSu, Base Module for Electronic Modules, Periphery, C-rail, 1-Row, 6 Connection Levels, 12 Terminals, Spring-Loaded Connection
MFR: PILZ
MFR #: 312623
Item #: 1532729
Available to Order
$64.00 each
Availability
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PILZ
PNOZsigma Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, Manual/Automatic Start, 3 N/O, 1 N/C, 1 SC, UB 24 VDC, 22.5 mm, Plug-in Spring-Loaded Terminals, Monitoring of E-STOP, Safety Gates, Lightguard
MFR: PILZ
MFR #: 751104
Item #: 503861
Available to Order
$463.50 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without detection of Shorts Across Contacts, 3 N/O, 1 N/C,1 SC, Automatic/Monitored Start, UB = 24 V AC/DC, 45mm, Plug-in Screw Terminals, Monitoring of E-STOP, Safety Gates Sidewards Compatibility with PNOZ X3
MFR: PILZ
MFR #: 787314
Item #: 1587134
Available to Order
$568.50 each
Availability
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PILZ
PNOZsigma Safety Relay, 1-Channel Wiring, Without Detection of Shorts Across Contacts, Manual/Automatic Start, 3 N/O, 1 N/C, 1 SC, UB 24 VDC, 17.5mm, Plug-in Screw Terminals, Monitoring of E-STOP, Safety Gates
MFR: PILZ
MFR #: 750102
Item #: 1638205
Available to Order
$300.84 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without detection of Shorts Across Contacts, 2 N/O, 2 N/Ot-d, UB = 24 VDC, 45mm, Screw Terminals Integrated, E-STOP Monitoring, Safety Gates, with 2 Delay-on De-Energization Contacts, Delay Time Adjustable
MFR: PILZ
MFR #: 774502
Item #: 1552481
Available to Order
$814.50 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 7 N/O, 2 N/C, 2 SC, Automatic/Manual/Monitored Start and Automatic Start with Start-up Test, UB 24 V AC/ DC, 90 mm, Screw Terminals Integrated, Monitoring of E-STOP, Safety Gates
MFR: PILZ
MFR #: 774609
Item #: 111337
In Stock -
$1117.50 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 3 N/O, 1 N/C, 1 SC, Automatic/Monitored Start, UB 120 V AC/24 V DC, 45 mm, Screw Terminals Integrated, Monitoring of E-STOP, Safety Gates
MFR: PILZ
MFR #: 774316
Item #: 181435
In Stock -
$546.00 each
Availability
Location Available Qty
PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 7 N/O, 1 N/C,1 SC, Automatic/Manual/Monitored Start, Start-up Test, UB = 110-120 V AC/24 V DC, 90mm, Screw Terminals Integrated, Monitoring of E-STOP, Safety Gates, Feedback Loop
MFR: PILZ
MFR #: 774085
Item #: 523235
Available to Order
$960.00 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 3 N/O, 2 N/Ot-d, UB = 24 VDC, 45mm, Screw Terminals Integrated, E-STOP Monitoring, Safety Gates with 2 Delay-on De-Energization Contacts, Release Time 0.5s Fixed
MFR: PILZ
MFR #: 774544
Item #: 1394909
Available to Order
$826.50 each
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PILZ
PNOZsigma Contact Expansion, 4 N/O, 1 N/C, UB 24 VDC, 17.5 mm, Plug-in Screw Terminals, Contact Block for Contact Expansion in Connection with Safety-Related Control Components
MFR: PILZ
MFR #: 750107
Item #: 630828
Available to Order
$304.50 each
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PILZ
PNOZsigma Contact Expansion, 2 N/O, 1 SC, UB 24 VDC, 12.5mm, Plug-in Screw Terminals, Contact Block for Contact Expansion in Connection with Safety-Related Control Components
MFR: PILZ
MFR #: 750108
Item #: 1545190
Available to Order
$265.50 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 2 Safety Outputs, 1 Auxiliary Output in SC Technology, Automatic/Monitored Start, UB = 24 VDC, 22.5mm, Plug-in Terminals of Screw Type, Connection Between Several Devices, Monitoring of E-STOP, Safety Gates, Feedback Loop
MFR: PILZ
MFR #: 774133
Item #: 831934
Available to Order
$740.00 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 2 N/O, 2 N/Ot-d, UB = 24 VDC, 45mm, Screw Terminals Integrated, E-STOP Monitoring, Safety Gates, with 2 Delay-on De-Energization Contacts
MFR: PILZ
MFR #: 774500
Item #: 418013
Available to Order
$814.50 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with/without Detection of Shorts Across Contacts, 2 Safety Outputs, 1 Auxiliary Output in SC Technology, Delayed Automatic/Monitored Start, UB = 24 VDC, 22.5mm, Plug-in Terminals of Screw Type, Monitoring of E-STOP, Safety Gates, Feedback Loop
MFR: PILZ
MFR #: 774131
Item #: 1596951
Available to Order
$1006.00 each
Availability
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PILZ
Safety Relay, 1/2-Channel Wiring with Detection of Shorts Across Contacts, 7 N/O, 2 N/C, 2 SC, Automatic/Monitored Start, UB = 24 VDC, 90mm, Screw Terminals Integrated, Monitoring of E-STOP, Safety Gates
MFR: PILZ
MFR #: 774605
Item #: 182632
Available to Order
$1117.50 each
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PILZ
Configurable Safe Small Controllers PNOZmulti 2, Base Unit, Expandable, 20 Safe Digital Inputs, 4 Safe Semiconductor Outputs
MFR: PILZ
MFR #: 772100
Item #: 1249753
Available to Order
$1260.00 each
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PILZ
Contact Expansion, 1/2-Channel Wiring Without Detection of Shorts Across Contacts, 4 N/O, UB 24 VDC, 22.5mm, Plug-in Screw Terminals, Contact Block for Contact Expansion in Connection with Safety-Related Control Components
MFR: PILZ
MFR #: 777587
Item #: 1618524
Available to Order
$372.00 each
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Littelfuse
50-W ground-check termination assembly with convenient mounting holes and screw terminals.
MFR: Littelfuse
MFR #: SE-TA12A
UPC: 079458989489
Item #: 482948
Available to Order
$1949.48 each
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Littelfuse
Used when replacing an Atkinson Omser II with an SE-130-Series Monitor.
MFR: Littelfuse
MFR #: PMA-8
UPC: 079458978421
Item #: 1008517
Available to Order
$1690.93 each
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Littelfuse
The SE-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to monitor the integrity of the neutral-to-ground path and to detect ground faults. It measures current and voltage in a transformer or generator neutral-to-ground connection and continuity of the neutral-grounding resistor (NGR). The SE-325 coordinates these three measurements to detect a loose connection, corrosion, ground fault, or NGR failure, and provides one alarm or trip output contact.
MFR: Littelfuse
MFR #: SE-325
UPC: 079458988079
Item #: 1280879
Available to Order
$6008.93 each
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Littelfuse
Remote indication and reset for the SE-330, SE-330AU, and SE-330HV. NEMA 4 and NEMA 13 rating. Standard 22-mm mounting.
MFR: Littelfuse
MFR #: RK-332
UPC: 079458987836
Item #: 1204732
Available to Order
$1754.50 each
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Littelfuse
The EFCT series is a sensitive nickel-core current transformer used with Littelfuse relays to detect low levels of earth-leakage current.
MFR: Littelfuse
MFR #: EFCT-1
UPC: 079458977684
Item #: 534791
Available to Order
$2728.10 each
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Littelfuse
The SE-330 is an advanced ground-fault and neutral-grounding resistor monitoring relay that is compliant with Rule10-302 of the 2018 Canadian Electrical Code Part I (CE Code). It measures neutral current, neutral-to-ground voltage, and neutral-to-ground resistance. It provides continuous monitoring of the neutral-to-ground path to verify that the neutral-grounding resistor (NGR) is intact and that it has not been bypassed or shorted. An open NGR renders currentsensing ground-fault protection inoperative and could result in a false belief that the system is functioning properly. A shorted NGR results in higher-than-expected ground-fault current. The SE-330 can be used with low- and medium-voltage transformers and generators with low- or high-resistance grounding used in processing, manufacturing, chemical, pulp and paper, petroleum, and water-treatment facilities. For high-voltage applications, use the SE-330HV. For applications that require conformance to Australian standards, use the SE-330AU.
MFR: Littelfuse
MFR #: SE-330-SMA
UPC: 079458988604
Item #: 1204733
Available to Order
$1258.10 each
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Littelfuse
The EFCT series is a sensitive nickel-core current transformer used with Littelfuse relays to detect low levels of earth-leakage current.
MFR: Littelfuse
MFR #: EFCT-26
UPC: 079458977721
Item #: 866232
Available to Order
$1708.20 each
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Littelfuse
50-W ground-check termination assembly with convenient mounting holes and wire leads.
MFR: Littelfuse
MFR #: SE-TA6A-WL
UPC: 079458989557
Item #: 656337
Available to Order
$2237.33 each
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Littelfuse
Used On Systems Up To 15 kV.
MFR: Littelfuse
MFR #: ER-15KV
UPC: 079458977905
Item #: 501382
Available to Order
$9600.28 each
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Littelfuse
MOTOR OVERLOAD PROTECTION 8000
MFR: Littelfuse
MFR #: MP8000
UPC: 079458046113
Item #: 719830
Available to Order
$2811.85 each
Availability
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Littelfuse
CURRENT SENSOR
MFR: Littelfuse
MFR #: ECSL41AD
UPC: 079458992724
Item #: 1238971
Available to Order
$597.93 each
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Littelfuse
NGR MON.,UNIV.,SC FIBER & RJ45,61850
MFR: Littelfuse
MFR #: SE-330-07-00
UPC: 079458812848
Item #: 1528349
In Stock -
$24091.68 each
Availability
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Littelfuse
NGR MON.,UNIV., ETHERNET SC FIBER & RJ45
MFR: Littelfuse
MFR #: SE-330-04-00
UPC: 079458812473
Item #: 1526332
Available to Order
$22417.48 each
Availability
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Littelfuse
3-PHASE VOLTAGE MONITOR W/ DIS
MFR: Littelfuse
MFR #: 601
UPC: 079458989632
Item #: 1543863
Available to Order
$1557.80 each
Availability
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Littelfuse
PIN 8-PIN SOCKET
MFR: Littelfuse
MFR #: NDS-8
UPC: 079458997132
Item #: 746926
Available to Order
$29.50 each
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Littelfuse
3-PHASE VOLT MON/ 190-480V/AD
MFR: Littelfuse
MFR #: 460-B
UPC: 079458990591
Item #: 1359341
Available to Order
$469.80 each
Availability
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Littelfuse
SOCKET, 8 PIN OCTAL
MFR: Littelfuse
MFR #: OT08PC
UPC: 079458997422
Item #: 162871
Available to Order
$46.90 each
Availability
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Littelfuse
2X2 D.O.M. W/RELAY
MFR: Littelfuse
MFR #: KRDM215M
UPC: 079458994773
Item #: 1489833
Available to Order
$265.20 each
Availability
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Littelfuse
1-PHASE VOLTAGE MONITOR/ 115V/
MFR: Littelfuse
MFR #: 460-100-SP
UPC: 079458990508
Item #: 878271
Available to Order
$479.25 each
Availability
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Littelfuse
3-PHASE VOLTAGE MONITOR/ 190-4
MFR: Littelfuse
MFR #: 102A3
UPC: 079458990058
Item #: 24880
Available to Order
$736.30 each
Availability
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Littelfuse
DELAY ON BREAK TIMER
MFR: Littelfuse
MFR #: TSB422
UPC: 079458020434
Item #: 887406
Available to Order
$242.03 each
Availability
Location Available Qty
Littelfuse
3-PHASE VOLT MON/ 190-480V/ AD
MFR: Littelfuse
MFR #: 460
UPC: 079458989625
Item #: 150225
Available to Order
$386.28 each
Availability
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Littelfuse
UNIVERSAL ADJUSTABLE FLASHER
MFR: Littelfuse
MFR #: FSU1004
UPC: 079458993622
Item #: 1260645
Available to Order
$406.55 each
Availability
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