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Protection Relays & Systems

Protection Relays & Systems protect electrical circuits by detecting faults and preventing damage. Key attributes include Delay Time, Operating Temperature, and Trip Range. These components are essential for applications such as switching and control panels.

1,359 active parts
16 manufacturers
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What are Protection Relays & Systems ?

Protection Relays & Systems are devices designed to monitor electrical circuits and provide protection against faults. They are commonly used in switching and control panels, ensuring the safe operation of electrical systems. Important specifications for selection include Delay Time, which affects response speed; Operating Temperature, which ensures reliability under varying conditions; and Trip Range, which determines the sensitivity to faults. Validating lifecycle status and sourcing options is crucial for procurement teams to ensure compatibility and performance.

Parts in this category

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Part & Mfr Delay Time Features Function Mounting Type Operating Temperature Termination Style Trip Range Voltage
Product image for WUV-28DC by TE Connectivity
WUV-28DC
TE Connectivity
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Product image for WUV-405DC by TE Connectivity
WUV-405DC
TE Connectivity
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Product image for 1618112-8 by TE Connectivity
1618112-8
TE Connectivity
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 0 ~ 20s - Underfrequency Chassis Mount -20°C ~ 65°C Screw Terminal 50Hz ~ 60Hz 120VAC
Product image for 1840DBX by TE Connectivity
1840DBX
TE Connectivity
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Product image for WUV-1-120P by TE Connectivity
WUV-1-120P
TE Connectivity
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Product image for WUV-1-240P by TE Connectivity
WUV-1-240P
TE Connectivity
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Product image for 7-1618382-1 by TE Connectivity
7-1618382-1
TE Connectivity
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 0.075 ~ 0.1s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 75°C Screw Terminal 87.5 ~ 156.25VAC 125VDC
Product image for WUV-1-120H by TE Connectivity
WUV-1-120H
TE Connectivity
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Product image for 721X by TE Connectivity
721X
TE Connectivity
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Product image for 720X by TE Connectivity
720X
TE Connectivity
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Product image for 721TDX by TE Connectivity
721TDX
TE Connectivity
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Product image for 723X by TE Connectivity
723X
TE Connectivity
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Product image for 1-1618113-3 by TE Connectivity
1-1618113-3
TE Connectivity
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Product image for WUV-1-208P by TE Connectivity
WUV-1-208P
TE Connectivity
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Product image for 7-1618107-9 by TE Connectivity
7-1618107-9
TE Connectivity
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 0.5 ~ 20s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 84 ~ 150VAC 120VAC
Product image for 1618092-4 by TE Connectivity
1618092-4
TE Connectivity
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Product image for SE-701-0T by Littelfuse Inc.
SE-701-0T
Littelfuse Inc.
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 0.05 ~ 2.5s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault Chassis Mount, DIN Rail -40°C ~ 60°C Screw Terminal - 48VDC
Product image for SE-701-0D-CC by Littelfuse Inc.
SE-701-0D-CC
Littelfuse Inc.
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 0.05 ~ 2.5s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault Chassis Mount, DIN Rail -40°C ~ 60°C Screw Terminal - 12 ~ 24VDC
Product image for 2-1618107-2 by TE Connectivity
2-1618107-2
TE Connectivity
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Product image for WD25-023 by TE Connectivity
WD25-023
TE Connectivity
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 - - - Chassis Mount, DIN Rail -40°C ~ 60°C Screw Terminal - 100 ~ 140VAC, 100 ~ 200VDC
Product image for 1618065-9 by TE Connectivity
1618065-9
TE Connectivity
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Product image for 7-1618107-1 by TE Connectivity
7-1618107-1
TE Connectivity
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 0.5 ~ 20s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 168 ~ 300VAC 240VAC
Product image for 724X by TE Connectivity
724X
TE Connectivity
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 0.5 ~ 20s - - Chassis Mount - Screw Terminal - 575VAC
Product image for 1618059-4 by TE Connectivity
1618059-4
TE Connectivity
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Product image for 1001X by TE Connectivity
1001X
TE Connectivity
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Product image for 251DC-1X by TE Connectivity
251DC-1X
TE Connectivity
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 - - Overvoltage, Undervoltage Chassis Mount -20°C ~ 85°C Stud 84/145.6 ~ 150/260VAC 120/208VAC
Product image for 9-1618112-2 by TE Connectivity
9-1618112-2
TE Connectivity
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 0.5 ~ 20s - Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 84 ~ 120VAC 120VAC
Product image for 731TDX by TE Connectivity
731TDX
TE Connectivity
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Product image for 1-1618104-2 by TE Connectivity
1-1618104-2
TE Connectivity
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Product image for 1820DDBX by TE Connectivity
1820DDBX
TE Connectivity
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Product image for PGR-4700-120 by Littelfuse Inc.
PGR-4700-120
Littelfuse Inc.
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 0 ~ 1.5s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault DIN Rail -10°C ~ 60°C Screw Terminal 0.01 ~ 3A 120VAC
Product image for WOUV-240DC by TE Connectivity
WOUV-240DC
TE Connectivity
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 0.075 ~ 0.1s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 75°C Screw Terminal 168 ~ 300VDC 240VDC
Product image for 9-1618107-6 by TE Connectivity
9-1618107-6
TE Connectivity
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 0.5 ~ 20s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 402.5 ~ 718.75VAC 575VAC
Product image for 1618069-2 by TE Connectivity
1618069-2
TE Connectivity
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Product image for SE-704-0T by Littelfuse Inc.
SE-704-0T
Download Datasheet for SE-704-0T
Littelfuse Inc.
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 0.03 ~ 20s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault DIN Rail -40°C ~ 60°C Screw Terminal 0.01 ~ 5A 48VDC
Product image for 1618112-6 by TE Connectivity
1618112-6
TE Connectivity
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Product image for 5-1618112-5 by TE Connectivity
5-1618112-5
TE Connectivity
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 0.075 ~ 1s - Undervoltage Chassis Mount -40°C ~ 75°C Screw Terminal 16.8VDC ~ 24VDC 24VDC
Product image for WOUV-125DC-P by TE Connectivity
WOUV-125DC-P
TE Connectivity
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 0.075 ~ 0.1s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 75°C Screw Terminal 87.5 ~ 156.25VAC 125VDC
Product image for WOUVT-1-120AC-P by TE Connectivity
WOUVT-1-120AC-P
TE Connectivity
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 0.5 ~ 20s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 84 ~ 150VAC 120VAC
Product image for 6-1618107-6 by TE Connectivity
6-1618107-6
TE Connectivity
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 0.5 ~ 20s - Overvoltage, Undervoltage Chassis Mount -40°C ~ 70°C Screw Terminal 84 ~ 150VAC 120VAC
Product image for AF0100-10-CC by Littelfuse Inc.
AF0100-10-CC
Littelfuse Inc.
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 - - Arc-Flash Chassis Mount, DIN Rail -40°C ~ 70°C Screw Terminal 10 ~ 25 klux 24 ~ 48VDC
Product image for SE-704-0D-CC by Littelfuse Inc.
SE-704-0D-CC
Download Datasheet for SE-704-0D-CC
Littelfuse Inc.
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 0.03 ~ 20s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault DIN Rail -40°C ~ 60°C Screw Terminal 0.01 ~ 5A 12 ~ 24VDC
Product image for 1618107-5 by TE Connectivity
1618107-5
TE Connectivity
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Product image for WD2759-002 by TE Connectivity
WD2759-002
TE Connectivity
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 0.5 ~ 10s - Overvoltage, Undervoltage Chassis Mount, DIN Rail -40°C ~ 60°C Screw Terminal 72 ~ 672VAC 13.5 ~ 32VDC
Product image for 1618107-6 by TE Connectivity
1618107-6
TE Connectivity
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Product image for EL731-10-00 by Littelfuse Inc.
EL731-10-00
Littelfuse Inc.
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 0.05 ~ 2s CT Loop Monitoring, Harmonic Filtering Ground Fault, Overtemperature Panel Mount -40°C ~ 60°C Screw Terminal 0.03 ~ 5A 24/48VAC
Product image for 1618104-1 by TE Connectivity
1618104-1
TE Connectivity
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Product image for 9-1618103-8 by TE Connectivity
9-1618103-8
TE Connectivity
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Product image for 1618105-8 by TE Connectivity
1618105-8
TE Connectivity
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Product image for PGR-4700-240 by Littelfuse Inc.
PGR-4700-240
Littelfuse Inc.
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 0 ~ 1.5s CT Loop Monitoring, Harmonic Filtering, Manual Reset, Test Button Ground Fault DIN Rail -10°C ~ 60°C Screw Terminal 0.01 ~ 3A 240VAC
Showing 1001-1050 of 1,359 products

About Protection Relays & Systems

Protection Relays & Systems play a vital role in ensuring the safety and reliability of electrical systems. These components are designed to detect abnormal conditions and initiate protective actions to prevent damage to equipment and ensure operational continuity.

When sourcing Protection Relays & Systems, it is important to consider key attributes such as Delay Time, Features, Function, Mounting Type, Operating Temperature, Termination Style, Trip Range, and Voltage. These specifications will help you identify the right relay for your specific application needs.

Common applications for Protection Relays & Systems include switching and control panels, new product design and prototyping, production electronics assembly, maintenance and field replacement, and engineering evaluation and qualification. Understanding the operational context will aid in selecting the most suitable components.

Before submitting a Request for Quotation (RFQ), buyers should prioritize comparing critical specifications and validating lifecycle status. It is also advisable to confirm mechanical and electrical compatibility with existing design constraints to minimize sourcing risks. Utilizing parametric filtering can streamline the selection process and enhance procurement efficiency.

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