Contactor Overload Relays

All electric motors have a lifespan, and to keep them running efficiently and safely they must be protected. One of the main causes of failure is electrical overload, sometimes called overcurrent. When a motor draws more current than it is designed to handle it causes the temperature to build-up resulting in overheating. This damages motor windings and coils. It is important to protect the motor and its circuit, and this is where the use of contactor overload relays can help.RS Components offer an extensive range of high-quality contactor overload relays from leading industry brands including Schneider Electric, Siemens, ABB, Eaton, Lovato, and Rockwell Automation.

What is overload protection?

Overload is where a motor draws a high current above its rated value for an extended amount of time. Overload causes overheating of the motor causing damage. To prevent this from happening devices such as contactor relays are specifically designed for industrial control motor protection. They are used with contactors as part of a motor starter or in a control panel or centre.

What are the different types of contactor overload relays?

The motor protection devices can be classified into two main types which are thermal types and electronic types.Thermal overload relaysUtilise a bi-metallic plate located near a heating element. When excessive current is passed through the heating element N/C (Normally Closed) contacts switch over and opens contacts. This interrupts power from flowing to the contactor's control circuit. Thermal overloads usually offer an adjustable current range as well as a manual or automatic reset option.Electronic RelaysElectronic overload relays don't have a bi-metallic mechanism, Instead, they work by using components such as temperature sensors to measure the load current. They are generally more accurate than thermal devices and they usually have a wider current range, a selectable trip class provides enhanced trip protection against single phasing against the motor.


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Omschrijving Prijs FLC Motor Rating Contact Current Rating Control Voltage Range Pole Configuration Mounting Style Contact Voltage Rating Series Normal State Configuration Supply Voltage Power Rating Reset Method Terminal Type Number Of Auxiliary Contacts
RS-stocknr. 781-2611
FabrikantnummerLEV100A5ANG 9-1618389-8
FabrikantTE Connectivity
102,27 €
Each
Aantal stuks
- 100 A - KILOVAC - - - LEV100 1NO - - - Screw -
RS-stocknr. 394-9330
FabrikantnummerLRD21
55,91 €
Each
Aantal stuks
12 → 18 A 18 A - TeSys 3P Direct Contactor 690 V ac LRD 1NO + 1NC - - Automatic, Manual Screw 2
RS-stocknr. 261-5733
FabrikantnummerLT3SM00M
279,93 €
Each
Aantal stuks
- - 115 V ac, 230 V ac TeSys - - 250 V ac LT3S 1NO + 1NC - 100 VA Manual Cage Clamp 2
RS-stocknr. 279-6292
FabrikantnummerCA3KN31BD
32,72 €
Each
Aantal stuks
- 10 A 24 Vdc TeSys K - Plate 690 V ac CA3KN 3NO + 1NC - - - Screw -
RS-stocknr. 395-0425
FabrikantnummerCAD32BD
68,02 €
Each
Aantal stuks
- 10 A 24 Vdc TeSys - DIN Rail Mount 690 V dc CAD 2NO + 2NC - - - Screw -
RS-stocknr. 781-2620
FabrikantnummerLEV200A4ANA 1618387-3
FabrikantTE Connectivity
116,76 €
Each
Aantal stuks
- 500 A - KILOVAC - - - LEV200 1NO - - - Lug Ring Terminal -
RS-stocknr. 759-099
FabrikantnummerCA4KN40BW3
37,36 €
Each
Aantal stuks
- 10 A - TeSys K - - 690 V dc CA4KN 4NO - - - Screw -
RS-stocknr. 394-9403
FabrikantnummerLRD07
51,87 €
Each
Aantal stuks
1.6 → 2.5 A 2.5 A - TeSys 3P Direct Contactor 690 V ac LRD 1NO + 1NC - - Automatic, Manual Screw 2
RS-stocknr. 608-7182
FabrikantnummerCA3KN22BD3
35,43 €
Each
Aantal stuks
- 10 A - TeSys K - DIN Rail Mount 690 V ac CA3KN 2NO + 2NC - - - Screw -
RS-stocknr. 395-0396
FabrikantnummerCAD32P7
37,31 €
Each
Aantal stuks
- 10 A - TeSys - - 690 V ac CAD 2NO + 2NC - - - Screw -
RS-stocknr. 758-850
FabrikantnummerCA2KN22F7
29,38 €
Each
Aantal stuks
- 10 A - TeSys K - DIN Rail Mount 690 V ac CA2KN 2NO + 2NC - - - Screw -
RS-stocknr. 727-6210
FabrikantnummerLRD340
84,13 €
Each
Aantal stuks
30 → 40 A 40 A - TeSys D - Under Contactor Mount 1 kV ac LRD 1NO + 1NC - - - Screw 2
RS-stocknr. 395-0374
FabrikantnummerCAD50BD
68,02 €
Each
Aantal stuks
- 10 A - TeSys - - 690 V ac CAD 5NO - - - Screw -
RS-stocknr. 122-1304
FabrikantnummerRW27-2D3-D018
FabrikantWEG
48,56 €
Each
Aantal stuks
1.8 A 1.2 → 1.8 A - - 3P Direct Contactor 690 V ac RW27 1NO + 1NC - 0.9 → 1.7 W Automatic, Manual Screw 2
RS-stocknr. 711-6301
Fabrikantnummer1SBH137001R1340 NF40E-13
FabrikantABB
61,00 €
Each
Aantal stuks
- 6 A - AF Range - - 690 V ac NF 4NO - - - Screw 4
RS-stocknr. 685-1318
Fabrikantnummer11BG0040A230
FabrikantLovato
19,82 €
Each
Aantal stuks
- 10 A - Orange - - 690 V ac BG 4NO - - - Screw -
RS-stocknr. 685-1488
Fabrikantnummer11BG0022A230
FabrikantLovato
19,82 €
Each
Aantal stuks
- 10 A - Orange - - 690 V ac BG 2NO + 2NC - - - Screw -
RS-stocknr. 297-2351
Fabrikantnummer066166 & EMT6
FabrikantEaton
81,81 €
Each
Aantal stuks
- 3 A 24 → 240 Vac/dc EMT - DIN Rail Mount 400 V ac EMT6 1NO + 1NC - 2 W Automatic, Manual Screw 2
RS-stocknr. 394-9380
FabrikantnummerLRD08
51,87 €
Each
Aantal stuks
2.5 → 4 A 4 A - TeSys 3P Direct Contactor 690 V ac LRD 1NO + 1NC - - Automatic, Manual Screw 2
RS-stocknr. 493-0539
Fabrikantnummer276379 & DILA-31(24VDC)
FabrikantEaton
35,92 €
Each
Aantal stuks
- 4 A - XStart - - 415 V ac DILA 3NO + 1NC - - - Screw -