Thermal Magnetic Circuit Breakers

Thermal magnetic circuit breakers are devices that provide protection against overcurrent in circuits. Circuit breakers use an automatically operated electrical switch to disrupt the flow of current when an overload or short circuit is detected. Thermal magnetic circuit breakers do this using an electromagnet and bimetallic strips. 


Circuit breakers provide more sophisticated protection against overcurrent than a simple fuse. Fuses simply burn out and have to be replaced, whereas circuit breakers just need to be reset.


How do thermal magnetic circuit breakers work?

In thermal magnetic circuit breakers, there are two ways the flow of current might be detected and disrupted. In the event of a short circuit, the electromagnet rapidly trips the switch. If the overload is smaller, over a longer period of time, the bimetallic strips will instead eventually react to trip the switch. 


What are thermal magnetic circuit breakers used for?

Thermal magnetic circuit breakers are most often used in distribution boards. They make up part of the subsidiary circuits in the broader electrical supply system, protecting against overcurrent.


...
顯示內容 隱藏內容

篩選條件

正在檢視 81 - 100,共 2172 項產品
Results per page
Description Price Current Rating Number of Poles Range Voltage Rating Width Series Application Break Time Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Hole Diameter Mounting Hole Length Mounting Hole Size Mounting Hole Width
RS庫存編號 188-4746
製造零件編號GV3L731
HK$2,825.68
單位
73A 3 TeSys 690V ac 136mm GV3L - - 6 kA @ 690 V ac - - - - -
RS庫存編號 899-8911
製造零件編號3DU8L
BrandAltech
HK$808.01
單位
8A 3 - - - L Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformer, UL489 Applications Time Delay 10 kA MCCB - - - -
RS庫存編號 284-5906
製造零件編號4400.0017
BrandSchurter
HK$87.11
單位
16A 1 - 240V ac - T11 - - - - - - - -
RS庫存編號 175-1513
製造零件編號GV4P80N
HK$4,126.45
單位
80A 3 TeSys 690V ac 165mm GV4P - - 8 kA @ 660 → 690 V ac - - - - -
RS庫存編號 899-4953
製造零件編號3D25UM
BrandAltech
HK$398.08
單位
25A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers, UL508 Application Time Delay 10 kA MCCB - - - -
RS庫存編號 899-1673
製造零件編號2DU3L
BrandAltech
HK$353.83
單位
3A 2 - - - L Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformer, UL489 Applications Time Delay 10 kA MCCB - - - -
RS庫存編號 899-1535
製造零件編號2D5UM
BrandAltech
HK$265.34
單位
5A 2 - - - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers, UL508 Application Time Delay 10 kA MCCB - - - -
RS庫存編號 881-1148
製造零件編號CMB-123-11C3N-B-A
HK$16.52
/個 (每包:10個)
單位
12A 1 - - - CMB Audio Visual Equipment, Household Appliances, Marine Applications, Medical Equipment, Power Strips, Power Supplies, Transportation Time Delayed 2500 A @ 32 V dc - - 10mm 10 x 11.2mm 11.2mm
RS庫存編號 899-9100
製造零件編號3GU1
BrandAltech
HK$793.94
單位
1A 3 - 480Y/277V - V-EA - Time Delay 10 kA MCCB - - - -
RS庫存編號 284-5782
製造零件編號4400.0059
BrandSchurter
HK$70.81
單位
500mA 1 - 240V ac - T11 - - - - - - - -
RS庫存編號 899-2922
製造零件編號2BU10R
BrandAltech
HK$215.64
單位
10A 2 - 480Y/277V - R Appliance Circuit, Appliances, Business Equipment, Control Circuits and Some Electronic Applications, Lighting, Power Supplies, Sensitive Electronics, UL1077 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS庫存編號 899-3385
製造零件編號2D10UL
BrandAltech
HK$482.76
單位
10A 2 - 480Y/277V - UL Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers Time Delay 10 kA MCCB - - - -
全新
RS庫存編號 209-1360
製造零件編號DOMA45C16
HK$204.00
單位
16A 1P+N Domae 230V ac 18mm Domae MCB DPN - - - - - - - -
RS庫存編號 458-8706
製造零件編號1180-01-3A
BrandETA
HK$125.61
單位
3A 1 - - 8.2mm 1180 - - - - - - - -
RS庫存編號 868-8813
製造零件編號4400.0348
BrandSchurter
HK$85.23
單位
1.5A 1 - - - - - - - MCB - - - -
RS庫存編號 879-8639
製造零件編號AA1-B0-34-615-3B1-C
HK$149.15
單位
15A 1 - - - A Generators, Marine Applications, Military, Renewable Energy Systems, Telecommunications, Welder Medium 5000 A @ 80 V dc - 16mm - - -
RS庫存編號 729-2767
製造零件編號2-5700-IG2-P10-DD-000040-12A
BrandETA
HK$213.24
單位
12A 1 - - 15.7mm 2 5700 - - - - - - - -
RS庫存編號 899-3272
製造零件編號2CU25L
BrandAltech
HK$429.99
單位
25A 2 - - - L Lighting and Control Circuit Applications, Low Inrush Motors, Receptacles, Resistive Load, UL489 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS庫存編號 175-1454
製造零件編號GV4LE03N
HK$3,074.16
單位
3.5A 3 TeSys 690V ac 116mm GV4LE - - 8 kA @ 660 → 690 V ac - - - - -
RS庫存編號 175-1459
製造零件編號GV4LE07N6
HK$2,839.09
單位
7A 3 TeSys 690V ac 116mm GV4LE - - 8 kA @ 660 → 690 V ac - - - - -