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Contactor Overload Relays

The entire electric motor comes with a warranty to let them work reliably, efficiently, and safely. Since a protective system is our main concern, however, some causes happen with the failure of electrical overload, often referred to as overcurrent. As soon as a motor brings high voltage as compared to the designed to tackle its failures, the temperature develops a system consequence of overheating. Motor windings and coils are harmed by this. The motor and its circuit need to be protected, which is where connector overload relays might be useful. Schneider Electric, Siemens, ABB, Eaton, Lovato, and Rockwell Automation are just a few of the prestigious industry companies that offer a wide selection of high-quality connector overload relays.

What is Overload Safety?

Overload is usually referred to as a motor drawing a potential voltage over the rated value for a long time. Since they lead to overheating in the motor, which caused damage and failures in the system. In order to monitor or control such scenarios, devices like contactor relays are primarily manufactured for industrial control and automated motor protection. They are used with integrated contractors as a component of a machine starter and control board. 

What are the Various Types of Contactor Overload Relays?

Motor safety devices are categorized into two prime types such as thermal types and electronic types.

  • Thermal Relays: The thermal overload relays make use of a bi-metallic plate situated immediately to the heating object. When a current excessively passes through the heating device Normally closed connection turns over and starts contacts. The interference power ranges from flowing to the connection's automated or control circuit. Typically, thermal overloads have a manual or automatic reset option as well as an adjustable current range.
  • Electronic Relays: Electronic overload relays don't operate using a bi-metallic mechanism; instead, they measure the load current using parts like temperature sensors. They often have a larger current range and are more precise than thermal devices. A selectable trip class offers improved trip prevention against single phasing against the motor.

Why Enrgtech?

Enrgtech offers an extensive collection of durable and reliable contactor overload relays with excellent specifications. We rank in the market for product durability, excellence, designs, and varied desired applications. Visit our website to explore other product categories and order inexpensively using our eCommerce platform with efficient delivery services.


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3RB3026-1PB0, Siemens
1 In Stock
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£ 86.30
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3RU2126-1CB0, Siemens
1 In Stock
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£ 49.23
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3RB3016-1SB0, Siemens
3 In Stock
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£ 87.60
Lovato
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RF382500, Lovato
27 In Stock
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£ 57.52
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3RB3123-4SB0, Siemens
1 In Stock
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£ 146.71
1SAZ431201R1002 TF140DU-110, ABB
5 In Stock
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£ 202.13
1SAZ911201R1004 TF96-78, ABB
2 In Stock
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£ 129.65
Schneider Electric
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A9E21181, Schneider Electric
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£ 302.99
Schneider Electric
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CA4KN313BW3, Schneider Electric
4 In Stock
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£ 52.73
Schneider Electric
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CAD503BD, Schneider Electric
1 In Stock
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£ 77.03
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1SAX121001R1103 EF19-2.7, ABB
4 In Stock
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£ 92.85
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1SAX121001R1104 EF19-6.3, ABB
3 In Stock
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£ 98.13
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1SAZ721201R1043 TF42-10, ABB
17 In Stock
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£ 45.62
Schneider Electric
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CA3KN31FD, Schneider Electric
2 In Stock
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£ 60.22
Schneider Electric
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CA2KN31P7, Schneider Electric
10 In Stock
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£ 46.12
Schneider Electric
LRD35, Schneider Electric
3 In Stock
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£ 108.95
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3RU2126-1FC0, Siemens
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£ 42.26
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3RU2116-1EB0, Siemens
2 In Stock
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£ 45.83
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3RU2126-1EB0, Siemens
1 In Stock
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£ 49.23
RFE453200, Lovato
2 In Stock
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£ 103.84
RFE450200, Lovato
1 In Stock
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£ 82.80
Schneider Electric
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CA2KN22M7, Schneider Electric
14 In Stock
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£ 32.54
Lovato
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RF829500, Lovato
2 In Stock
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£ 167.30
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3TH4293-0AD0, Siemens
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£ 90.74
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278435 ZB12-1, Eaton
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£ 46.12
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New Items
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010042 & DILER-22-G(24VDC), Eaton

010042 & DILER-22-G(24VDC), Eaton

Eaton Contactor Overload Relays - DILE Mini Contactor Relays Features and Benefits
New items
EF19-6.3, ABB

EF19-6.3, ABB

Electronic Overload Relay Electronic overload relays are the alternative to the thermal overload relays; they offer reliable and fast protection for motors in the event of overload or phase failure. Overload protection – trip class 10E, 20E, 30E selectable Phase loss sensitivity Adjustable current setting for overload protection Automatic or manual reset selectable Trip-free mechanism Status indication STOP and TEST function Sealable operating elements
New items
1SAZ421301R1006, ABB

1SAZ421301R1006, ABB

1SAZ421301R1006 The ABB NFZ contactor relay is used for switching auxiliary and control circuits. NFZ contactor relay include an electronic coil interface accepting a wide control voltage Uc min. to Uc max. It has only four coils cover control voltages between 24 to 250 V 50/60 Hz or 12 to 250 V DC. It can manage large control voltage variations. Screw terminals IP20 Protection
New items
1SBH101001R2031, ABB

1SBH101001R2031, ABB

1SBH101001R2031 The ABB NFZ contactor relay is used for switching auxiliary and control circuits. NFZ contactor relay include an electronic coil interface accepting a wide control voltage Uc min. to Uc max. It has only four coils cover control voltages between 24 to 250 V 50/60 Hz or 12 to 250 V DC. It can manage large control voltage variations. Screw terminals IP20 Protection
New items
1SBH103001R8122, ABB

1SBH103001R8122, ABB

1SBH103001R8122 The ABB NFZ contactor relay is used for switching auxiliary and control circuits. NFZ contactor relay include an electronic coil interface accepting a wide control voltage Uc min. to Uc max. It has only four coils cover control voltages between 24 to 250 V 50/60 Hz or 12 to 250 V DC. It can manage large control voltage variations. Screw terminals IP20 Protection
New items
3RT2016-1JB41, Siemens

3RT2016-1JB41, Siemens

Contactors - 3RT Range, Screw Connections The 3RT Range of Siemens Contactors. All models are highly reliable and extremely good quality. Screw Connection All models vary with Current rating and Voltage. Various NO/NC Values Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
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3RU2116-1JC1, Siemens

3RU2116-1JC1, Siemens

Overload Relay - 3RU range Switch position indicator and test function STOP button Selector switch for manual/automatic reset Screw connection or Spring-clamp versions Impulse voltage resistance 6 kV Insulation voltage 690V Surface or DIN-rail stand-alone mounts available, see 706-1699 etc The 3RU21 thermal overload relays up to 80 A have been designed for current-sensitive protection of loads with normal starting. These thermal overload relays for use with Sirius Size S0 & S00 Contactors Note Screw terminals can only be used with screw terminal overloads and spring terminals can only be used with spring terminal overloads. Approvals CE, UL, CSA Siemens Sirius Range Contactor & Control Relays Siemens control gear for feeders up to 5.5kW. The complementary nature of the devices allows fast and simple assembly, for example, of motor starters and reversers. A perfect match between contactors, overloads, circuit breakers and accessories for the same power ratings provides a uniform panel appearance and the standard widths with no side-by-side mounting derating allows for space saving.
New items
010157  DILER-31-G(24VDC), Eaton

010157 DILER-31-G(24VDC), Eaton

Eaton Contactor Overload Relays - DILE Mini Contactor Relays Features and Benefits
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LRD365L, Schneider Electric

LRD365L, Schneider Electric

Three-pole Thermal Overload Relays Three-pole thermal overload relays designed to protect ac circuits against overloads, phase failure, long starting times and prolonged stalling of the motor. Adjustable relay setting dial Test button Stop button Manual/auto reset Trip indicator Sealable cover 1N/O & 1N/C auxiliary contacts Direct mounting beneath three-pole contactors or independent mounting on DIN rail Insulation voltage 600V, Withstand Voltage 6kV Dimensions when mounted on an ac contactor Contactor Rating(kW) H (mm) W (mm) D (mm) 4 - 9 123 45 86 11 - 18.5 137 45 92 22 - 37 175 75 123 45 178 85 129 59 - 80 267 120 136 Dimensions when mounted on a dc contactor Contactor Rating (kW) H (mm) W (mm) D (mm) 4 - 9 123 45 95 11 - 18.5 137 45 101 Approvals UL and CSA
New items
3RB3046-1UW1, Siemens

3RB3046-1UW1, Siemens

The Siemens 50A electronic overload relay mainly used for motor protection of size S3. It has different electrical connection for main current circuit straight-through transformers connection and for auxiliary and control current circuit screw-type termin Protection class IP20 Ambient temperature during operation -25 to +60 °C Trip class 10E
New items
276316  DILA-40(24V50HZ), Eaton

276316 DILA-40(24V50HZ), Eaton

Eaton Contactor Overload Relays - DILA Series Industrial Control Relays Features and Benefits
New items
1SBH137001R1231, ABB

1SBH137001R1231, ABB

Contactor Relay AF contactor relays are AC/DC operated AF09-AF38 contactor relays include an electronic coil interface accepting a wide control voltage Ucmin - Ucmax. Only four coils cover control voltages 24 → 500 Vac or 20 → 500 Vdc AF..Z contactor relays equipped with a Z coil type allow direct control by 24 Vdc, 500 mA PLC output and obtain a reduced holding coil consumption AF.Z contactor relay withstand short dips and voltage interruptions (SEMI F47 compliance) AF contactor relay have built in surge protection and does not require any additional surge suppressors. The contactor relays have mechanically-linked contact elements compliant with Annex L of IEC 609947-5-1 and include the "mechanically Linked" symbol on their side Standards IEC 60947-5-1 and EN 60947-5-1, UL 508, CSA C22.2 N 14
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Contactor Overload Relays and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Contactor Overload Relays or any other product.
This depends on the Contactor Overload Relays individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Contactor Overload Relays and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Contactor Overload Relays.
Yes. We keep updating our stock frequently and if a product like Contactor Overload Relays is not in stock then we will let you know.