Rotary Cam Switches Manufacturer Since 1981

An AC switch is specific for welders, and is primarily used for an alternating current of 50 or 60 HZ, and is suitable for a variety of motors with a rated voltage under 440V.

To meet welder needs, the switch is designed with 6 poles on a 30° switching position. Cansen’s cam switches are easy to install and operate, and we also offer customization services if none of the installation sizes meet your needs.

Normal working conditions
The temperature should be between +40℃ and -25℃, and the 24h average temperature should not be higher than +35℃.
The installation altitude should be under 2000m.
It cannot be switched when the welder is overloaded.
When the temperature is +40℃, the humidity level should be under 50%, and the humidity level can be higher when temperatures are low. For example, 90% at 20℃.
Class of pollution: 3

Technical parameter

Type specification	KDHc-20	KDHc-25	KDHc-32	KDHc-40	KDHc-63
Conventional thermal current Ith A	20	25	32	40	63
Rated working voltage Ue V	240/440	240/440	240/440	240/440	240/440
Rated working current Ie
AC-21A	20	25	32	40	63
Operation cycle
No-load	8500	8500	8500	8500	8500
On-load	1500	1500	1500	1500	1500
Total	10000	10000	10000	10000	10000
Operation frequency times/h	120	120	120	120	120

Listed below are switches produced by Cansen. Please do not hesitate to contact us about customization or for more information.

KDHc-20 3K8121

Rated working current: 20A
Panel: 48*48mm
Diagram code: 3K8121
Color: Red
Handle: I type
IP rating: IP20 Certification: UL, CE, TUV, CCC, ISO


Parameter

Description	KDHc-20
Rated thermal current Ith A	20
Rated working voltage Ue V	240/440
Rated working current A
AC-21A	20
Operation
Non-load	8500
Load	1500
Total	10000
Operation frequency times/h	120

KDHc-25 3K8121

Rated working current: 25A
Panel: 64*64mm
Diagram code: 3K8121
Color: Red
Handle: B type
IP rating: IP20 Certification: UL, CE, TUV, CCC, ISO


Parameter

Description	KDHc-25
Rated thermal current Ith A	25
Rated working voltage Ue V	240/440
Rated working current A
AC-21A	25
Operation
Non-load	8500
Load	1500
Total	10000
Operation frequency times/h	120

KDHc-32 3K8121

Rated working current: 32A
Panel: 64*64mm
Diagram code: 3K8121
Color: Red
Handle: B type
IP rating: IP20 Certification: UL, CE, TUV, CCC, ISO


Parameter

Description	KDHc-32
Rated thermal current Ith A	32
Rated working voltage Ue V	240/440
Rated working current A
AC-21A	32
Operation
Non-load	8500
Load	1500
Total	10000
Operation frequency times/h	120

KDHc-40 3K8121

Rated working current: 40A
Panel: 64*64mm
Diagram code: 3K8121
Color: Red
Handle: B type
IP rating: IP20 Certification: UL, CE, TUV, CCC, ISO


Parameter

Description	KDHc-40
Rated thermal current Ith A	40
Rated working voltage Ue V	240/440
Rated working current A
AC-21A	40
Operation
Non-load	8500
Load	1500
Total	10000
Operation frequency times/h	120

KDHc-63 3K8121

Rated working current: 63A
Panel: 64*64mm
Diagram code: 3K8121
Color: Red
Handle: B type
IP rating: IP20 Certification: UL, CE, TUV, CCC, ISO


Parameter

Description	KDHc-63
Rated thermal current Ith A	63
Rated working voltage Ue V	240/440
Rated working current A
AC-21A	63
Operation
Non-load	8500
Load	1500
Total	10000
Operation frequency times/h