KW4A-DSWB2ST400A Competitive Mini Switch from China Factory SWITECH with Roller

Series:KW4A series

Description:

Type:KW4A-DSWB2ST400A

Construction category:D type
Operation method:Snap Action
Configuration:Single-Pole Single-Throw (SPST)
Terminal form:Solder Terminal
Mounting:via side mounting holes
Protection:IP40

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  • Applications
  • Technical parameters
  • Remarks

Widely used in home appliance, electronic equipment, automatic machine,
communication equipment, car electron, apparatus and instrument, electric motion tool etc.

Rice cooker
Slow cooker
Electric Heating Faucet
Shredder

Electromagnetic lock
Baby chair
CNC machine tools
Power generator
Test equipment

Power tools
Air conditioner
Water heater control panel
Bathroom products
Vacuum cleaner
Kitchen products

3.DETAIL SPECIFICATIONS
Type:KW4A-DSWB2ST400A
Construction category:D type
Operation method:Snap Action
Configuration:Single-Pole Single-Throw (SPST)
Terminal form:Quick connect Terminal #110

Mounting:via side mounting holes

Protection:IP40

3.1OPERATING CHARACTERISTICS

Characteristics

Units

Standards

Note

Actuating Force

N

1.3  Max

Original 1.3 Max

Over Travel

mm

1.2 Max

Original 1.2 Max

Operating Position

mm

12-14

Original 12-14

Note:
Actuating Force
The force required to move the actuator from the free to the operation position
Release Force
The force allowed the mechanism to reset actuator after operation
Free Position
The position of the actuator when no external force is applied
Operating Position
The position of the actuator when contact change-over take place
Movement Differential
The distance between operation and release position 

3.2 General
3.2.1 Application This specification is applied to KW4A Micro Switch used for electronic equipment.
3.2.2 Operating temperature range -25℃ to +125℃
3.2.3 Test conditions      
Unless otherwise specified. The atmospheric conditions for making measurements and tests are as follows.
Ambient temperature: 15~35℃
Relative humidity: 45~85%
Air pressure: 86~106kPa (860~1060 mbar)
Should any doubt arise in judgment. tests shall be conducted at the following conditions.
Ambient temperature: 20±2℃
Relative humidity: 60~70%
Air pressure: 86~106kPa (860~1060 mbar)
3.3 Appearance construction and dimensions
3.3.1 Appearance Switch shall have good finishing, and no rust crack or plating failures.
3.3.2 Construction and dimensions   Refer to individual product drawing.
3.4. Electrical specifications

NO.

Items

Test Condition

Criteria

3.4.1

Contact 

Resistance

Shall be measured at 1A,5V DC by voltage drop 

\method after some operations without load.

Applied position: Between terminal “C” and terminal “NO”.

50mΩ MAX

3.4.2

Insulation

 resistance

Test voltage:500VDC, measured after 1 min ±5s

Applied position: 
1)Between terminal “C” and terminal “NO”

2)Between terminal and ground

100MΩ MIN

3.4.3

Voltage proof

Following test voltages shall be applied for 1 min.

(Cut-off  current:0.5mA)

1)Between terminal “C” and terminal “NO”:1000VAC (50~60Hz)

2)Between terminal and ground: 1500V AC(50~60Hz)

Nodielectric 

breakdown 

shall occur

3.5. Durability

No.

Item

Test Condition

Criteria

3.5.1

Cold

After testing at -25±2℃ for 96 h,

 the switch shall be allowed to stand 

under normal room temperature and 

humidity condition for 1h, and 

then measurement shall be made 

within 1 h. water drops shall be 

removed.

Contact resistance(item 4.1): 

100mΩ MAX

Insulation resistance (item 4.2):

100MΩ MIN

Voltage proof:(item 4.3)

Nodielectric breakdown shall occur.

Operating characteristic (item 5.1):

Within specified value .

No abnormalities shall be 

recognized in 

appearance and construction。

 

 

3.5.2

Dry heat

After testing at 125±2℃ for 96 h, 

the switch shall be allowed to stand 

under normal room temperature 

and humidity condition for 1h, and 

then measurement shall be made 

within 1 h.

3.5.3

Damp heat

After testing at 40±2℃ and 90-95%RH 

for 96 h, the switch shall be 

allowed to stand under normal room

 temperature and humidity 

condition for 1h, and then measurement 

shall be made within 1 h. 

water drops shall be removed.

3.5.4

Change of 

temperature

After 5 cycles of following conditions

 the switch shall be allowed to 

stand under normal room 

temperature and humidity condition for 1h, 

and then measurement shall be

 made within 1 h. water drops shall 

be removed.

3.5.5

Salt mist

Switch shall be checked after following lest.

1) Temperature: 35±2℃

2) Salt solution: 5±1% (solids by mass)

3) Duration: 24±1h

After test, salt deposit shall be 

removed in running water

 

No remarkable corrosion shall be 

recognized in metal part

3.6. Welding Performance

 

3.6.1

 

Solder ability

Switch test under such conditions and inspect after. 

1Variable temperature range:235±5℃

2Dip time:3±0.5s

 

The area of dip tin 

should 

capture the 95% 

impregnated area

 

3.6.2

 

Resistance to 

soldering heat

 

The switch will be inspect under such conditions below

        Temperature and impregnated time

Trial measure

temperature(

Time(s

Slot welding method

260±5

5±1

Soldering method

350±5

3±0.5

 

 

 

All of the 

appearance, 

motor functions, 

electrical 

properties are no 

abnormal. 

 

3.6.1

 

Solder ability

Switch test under such conditions and inspect after. 

1Variable temperature range:235±5℃

2Dip time:3±0.5s

 

The area of dip tin 

should 

capture the 95% 

impregnated area

 

3.6.2

 

Resistance to

 soldering heat

 

The switch will be inspect under such conditions below

        Temperature and impregnated time

Trial measure

temperature(

Time(s

Slot welding method

260±5

5±1

Soldering method

350±5

3±0.5

 

 

 

All of the appearance, 

motor 

functions, electrical 

properties 

are no abnormal. 

3.7.  Durability

NO.

Item

Test Condition

Criteria

 

3.7.1

 

Endurance

(According

 to

 UL61058)

1/4hp 250VAC

Switch shall be operated according to following sequence

(Test1~Test2)

 

Voltage

Current

Power 

Factor

Operation 

Rate

Operation

 Cycles

Test 1

125V

17.4 A

0.4-0.5

6-10cycles/min

50cycles

Test 2

125V

2.9A

0.75-0.8

6-10cycles/min

50000cycles

 

5GPA 125/250VAC; 4A 30VDC

Operating Cycles:50,000 cycles

Operation Frequency:15~20 /min

Voltage proof:Test voltage shall be applied for 1 

min(50~60Hz, Cut-off current:0.5mA)

 

 

Insulation 

resistance

(item 4.2):

50MΩ MIN

Voltage proof:

Terminaland 

terminal:

1000VAC

No dielectric 

breakdown 

shall occur.

 

Operating 

characteristic 

(item 5.1):

Within 20% 

of specified
value .

 

6000 cycles 

temperature 

rise: 30℃ MAX

50000cycles 

temperature 

rise: 55℃ MAX

No abnormalities 

shall be 

recognized in 

appearance 

and construction

 

3.7.2

 

Endurance

(According

 to

 EN61058-1

/IEC61058

-1)

5A 250VAC

Operating Cycles:50,000 cycles

Operation Frequency:15~20 /min

Voltage proof:Test voltage shall be applied for 

1 min(50~60Hz, Cut-off current:0.5mA)

 

 

Insulation 

resistance

(item 4.2): 

50MΩ MIN

Voltage proof:

Terminal and 

terminal:750VAC

Terminal and 

ground:1125VAC

No dielectric 

breakdown 

shall occur.

Operating 

characteristic

 (item 5.1):

Within 10%,

-30% 

of specified
value .

Temperature 

rise:55℃ MAX

No 

abnormalities 

shall be 

recognized in 

appearance and 

construction

4. DRAWING & DIMENSION

5. CIRCUIT DIAGRAM

7.  PACKING:

7.1

Packing material:

Plastic box / 

Double-layers paper carton

7.2

Packing number:

100  pieces  per  box;25 boxes  per  inner  carton;

4 inner  cartons  per shipping  cartons

7.3

Weight:

Gross Weight:   24kg

Net Weight:     21kg

7.4

Size:

500 x 530 x 240mm

SAFETY APPROVAL & RATING:

Approved Rating

Mark

Reference No.

5A 125V AC ;5(3)A125/ 250V 

AC 5GPA 125/250VAC 1/4hp 250VAC 

25T125 5E4 50-60Hz IP40 4A 30VDC 25T125

5E4 IP40

UL&CUL

E176213

5A 250V AC μ10T85 1E4

VDE

137557

5(2)A 250V AC μ25T125 1E4

CQC

CQC02002001692

 

NEMKO

 

 

SEMKO

 

 

FIMKO

 

5(3)A125/ 250V AC 5GPA 125/250VAC 1/4hp 250VAC 25T125 5E4 50-60Hz IP40 4A 

30VDC 25T125 5E4 IP40

DEMKO

D-00715

5(3)A 250V AC μ25T125 5E4

CE

AN 50191602

5(3)A 250V AC μ25T125 5E4

TUV

R50191600

5(3)A125/ 250V AC 5GPA 125/250VAC 1/4hp 250VAC 25T125 5E4 50-60Hz IP40 4A 

30VDC 25T125 5E4 IP40

ENEC

ENEC-00181

 

EK

 

5(3)A125/ 250V AC 5GPA 125/250VAC 1/4hp 250VAC 25T125 5E4 50-60Hz IP40 4A 

30VDC 25T125 5E4 IP40

CB

DK-5170

5(3)A 250V AC μ25T125 5E4

KTL

 


 PARTS LIST

NO.

quantity

Items

Material

1

1

NC Terminal

The brass strip H65 Plate with silver

2

1

Cover

Engineering plastic Black PBT4308 

3

1

NO Terminal

The brass strip H65 Plate with silver

4

1

Support

The brass strip H65 Plate with silver

5

1

Case

Engineering plastic Black PBT4308

6

1

Plunger

Engineering plastic Black PPS-hGR40/41

7

1

Moving Piece

Beryllium bronze   QBe2

8

1

Spring Sheet

Beryllium bronze   QBe2

9

1

Moving arm

Stainless steel

10

2

Static Contact

AgNi10/Cu

11

1

Move Contact

AgNi10/Cu

Note: Returned plastic should not exceed 20%.

return