Home ProductsIndustrial Plugs

Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor

China Shenzhen City Breaker Co., Ltd. certification
China Shenzhen City Breaker Co., Ltd. certification
Excellent quality and fast delivery.

—— Victor

I want to say that your products very good. Thank you for all your suggestion, also good after sales service.

—— Mr Abílio Cipriano

Easy to talk with, very professional and fast service, the flag quality is super good. Even better than we ordered from Germany!!

—— Germany Fabian Scherb

I'm Online Chat Now

Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor

small.img.alt small.img.alt

Large Image :  Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor

Product Details:
Place of Origin: China
Brand Name: KRIPAL
Certification: CE, UL
Model Number: UKH40
Payment & Shipping Terms:
Minimum Order Quantity: 500 pcs
Price: negotiable
Packaging Details: Each unit packed in a individual box
Delivery Time: 20 days and depends on ordering quantity
Payment Terms: T/T, L/C
Supply Ability: 30000 pcs per month
Detailed Product Description
Customized: Color Pins: 3
Type: Thermal Protection: Overload
Usage: Usually With Ac Contactor Reset: Manual / Automatic
High Light:

Overload Protection Relay


Overcurrent Relays


Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor



Thermal overload relays are protective devices. They are designed to cut power if the motor draws too much

current for an extended period of time. To accomplish this, thermal overload relays contain a normally closed 

 (NC) relay. When excessive current flows through the motor circuit, the relay opens due to increased motor 

temperature, relay temperature, or sensed overload current, depending on the relay type. 


These overload relays are similar to circuit breakers in construction and use, but most circuit breakers differ

 in that they interrupt the circuit if overload occurs even for an instant.  Thermal overload relays are conversely 

designed to measure a motor's heating profile; therefore, overload must occur for an extended period before

 the circuit is interrupted.





UKH series overload relays apply to circuit of AC 50Hz or  60Hz, rated voltage to below 660V and rated current . 1A-800A for AC motor overload and open-phase protection during long time or intermittent long time service, which can also protect 3-phase serious imbalance and long starting time of motor or long timer operation, can also be used for corresponding AC contactor for electromagnetic starter.





Three-phase Balance Motion Time



Times of the setting current

Motion time

Start condition

Ambient temperature




Cold state





Heat state(Following the No.1 test)







2s< Tp≤10s


Cold state


4s< Tp≤10s





1. Direct mounting structure:

  The  thermal overload rela can be mounted directly to the Magnetic Contactors without

   additonal brackets.  (Applied model: UKH-22, 40, 85,100,150,220,630)


2. Safety cover

   The finger proof safety cover prevent careless touch of electric conductor


3 . Separation of power part and operation part

   The main circuit and the operation part are separately designed and the operation part is commonly used.


4 . Easy operation



Working condition:


1.  The installation altitude less than 2000m


2.  The surrounding temperature range: from -5°C ~ +40°C


3.  In the non-explosive condition. or without adequate erosion and destruction of gas and dust

     conductive area .


4.  Without  rain and snow invade 


5.  Pollution level 2




Class 10A Manual / Automatic Overload Thermal Relay With AC Contactor 0

Contact Details
Shenzhen City Breaker Co., Ltd.
Send your inquiry directly to us (0 / 3000)