KW3A-25ZSW0B-B300B-B High Current 25A Snap Action Switch

Series:KW3A series

Description:

Type:KW3A-25ZSW0B-B300B-B
Construction category:D type
Operation method:Snap Action
Configuration:Single-Pole Double-Throw (SPDT)
Terminal form: #187 quick-connect 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

CNC machine tools
Power generator
Test equipment

Power tools
Water heater control panel
Bathroom products
Vacuum cleaner
Kitchen products
Gas valve
Microwave oven


3. DETAIL SPECIFICATIONS
Type:KW3A-25ZSW0B-B300B-B 
Construction category:D type
Operation method:Snap Action
Configuration:Single-Pole Double-Throw (SPDT)
Terminal form: #187 quick-connect Terminal
Mounting:via side mounting holes
Protection:IP40
3.1OPERATING CHARACTERISTICS

Characteristics

Units

Standards

Note

Actuating Force

N

3.0 Max

Original 3.0 Max.

Release  Force

mm

0.7 Min

Original 0.7 Min.

Operating Position

mm

15.3±0.4

Original 15.3±0.4

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 KW3A Micro Switch used for electronic equipment.
3.2.2 Operating temperature range -25℃ ~ +85℃
3.2.3 Test conditions: Unless otherwise specified. The atmospheric conditions for making measurements and tests are as follows
Ambient temperature
Relative humidity
Air pressure Should any doubt arise in judgment. tests shall be conducted at the following conditions.
Ambient temperature 60~70%
Relative humidity: 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 conditions

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 and terminal  

50mΩ MAX

3.4.2

Insulation 

resistance

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

Applied position: 1)Between terminal and terminal 

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 and terminal :1000VAC (50~60Hz)

2)Between terminal and ground: 3750V AC(50~60Hz)

No dielectric 

breakdown

shall occur

3.5. Durability

NO.

Item

Test conditions

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):

50MΩ MIN

Voltage proof: (item 4.3)

No dielectric breakdown shall occur.

Operating characteristic (item 5.1):

Operating characteristic variety 

Within 

±10% of specified value .

No abnormalities shall be recognized 

in appearance and construction.

3.5.2

Dry heat

After testing at 85±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.  

3.7. Durability

NO.

Items

Test conditions

Criteria

 

3.7.1

 

Endurance

(According to

UL61058)

1hp 125VAC

Switch shall be operated according to following sequence

(Test1~Test2)

 

Voltage

Current

Power 

factor

Operation

 rate

Number 

of operation

Test1

125V

30A

0.75-0.8

6-10

cycles/min

50cycles

Test2

125V

25A

0.75-0.8

6-10

cycles/min

50000

cycles

Voltage proof(Cut-off current:0.5mA) 

Test voltages shall be applied for 1 min

 

25GPA 125/250VAC 

Switch shall be operated 50,000 cycles at 15-20 

cycles/min.

 

Insulation 

resistance

(item 4.2): 

50MΩ MIN

Voltage proof:

Terminal and 

ground:1000VAC

No dielectric 

breakdown 

shall occur.

Operating 

characteristic 

(item 5.1):

Within ±20% 

of specified

value.

6000cycles,

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)

25(10)A 250VAC

Switch shall be operated 50,000 cycles at 15-20 

cycles/min.

Voltage proof(Cut-off current:0.5mA)

Test voltages shall be applied for 1 min

 

Insulation 

resistance

(item 4.2): 

50MΩ MIN

Voltage proof:

Terminal and 

terminal:750VAC

Terminal and 

ground:1500VAC

No dielectric 

breakdown 

shall occur.

Operating 

characteristic 

(item 5.1):

Operating 

characteristic 

variety 

Within ±20% 

of specified 

value .

Temperature 

rise:55℃ MAX

No abnormalities 

shall be recognized 

in appearance and 

construction

 

 

4. DRAWING & DIMENSION:

 

 

5. CIRCUIT DIAGRAM:

6.1

Packing material:

Plastic box / 
Double-layers paper carton

6.2

Packing number:

125 pieces per box 
5 box per inner carton
4 inner cartons per shipping carton
Each shipping carton 2500 pieces

6.3

Weight:

Gross Weight:   21kg

Net Weight:     18kg

6.4

Size:

46.0 x 33.0 x 29.5 CM / 0.045CBM

Approved Rating

Mark

Reference No.

    1hp 125V / 2hp 250V 6K T85

UL&CUL

E176213

 

VDE

 

    25(10)A 250VAC 2E4 25T85

CQC

CQC10002040815

 

NEMKO

 

 

SEMKO

 

 

FIMKO

 

 

DEMKO

 

    25(10)A 250VAC 2E4 25T85

CE

AN50310920003

    25(10)A 250VAC 2E4 25T85

TUV

R50131050

 

ENEC

 

 

EK

 

 

CB

 

 PARTS LIST:

NO.

Quantity

Item

Material

1

1

Plunger

Bakelite PF2A5-151(j)b Red

2

1

  Lever

H62,silver plated

3

1

Case

Engineering plastic PBT4308 (black)

4

1

Moving piece

 Copper,Silver plated T2

5

1

Support

The brass strip H65, silver plated

6

2

Static contact

 AgCdO12

7

1

Terminal

Copper,Silver plated T2

8

1

Terminal

Copper,Silver plated T2

9

1

Move contact

AgCdO12

10

1

Spring sheet

Beryllium bronze QBe2

11

1

Cover

Engineering plastic PBT4308(black)

Note: Returned plastic should not exceed 20%.
return