KW7-0 Push-Button Microswitch
A compact momentary microswitch for compatible travel-limit mechanisms, foot-operated equipment, water pumps, diaphragm pumps and pressure-washer assemblies. Choose a normally open, normally closed or three-terminal changeover configuration and the pack size required for your project.
The supplier describes silver contacts and silver-plated copper components. Suitability depends on the original equipment, mounting dimensions, terminal layout and electrical load; this is not a universal replacement for every appliance.
Choose the Contact Configuration
| Option | Button released | Button pressed | Terminals |
|---|---|---|---|
| Normally Open (NO) | Open circuit | Closed circuit | 2 |
| Normally Closed (NC) | Closed circuit | Open circuit | 2 |
| 3-Pin Changeover (SPDT) | COM–NC closed; COM–NO open | COM–NC open; COM–NO closed | COM, NC and NO |
The illustrated two-terminal NO version has terminals closer together; the illustrated NC version has wider spacing. Use the actual terminal markings and an unpowered continuity check to confirm the configuration. Contact positions in the drawing are reference information and do not mean every option has three fitted terminals.
Supplier Technical Specifications
| Parameter | Supplier drawing |
|---|---|
| Model | KW7-0 |
| Electrical rating | 16A, 125/250VAC; source drawing value |
| Initial contact resistance | ≤100mΩ |
| Insulation resistance | ≥100MΩ at 500V DC |
| Dielectric strength | 500V AC, 50Hz, 1 minute |
| Operating temperature | −25°C to +75°C |
| Electrical life | ≥10,000 cycles |
| Mechanical life | ≥1,000,000 cycles |
| Main body dimensions | 28.00±0.10 × 16±0.10 × 10±0.15 mm; actuator and terminals project beyond the body |
| Mounting-hole offsets | 22.40±0.20 mm horizontally; 10.40±0.20 mm vertically |
| Mounting reference | 2 × Ø3.10 holes or M3 screws in the mounting sketch; body view separately labels Ø3.30±0.10 mm |
| Terminal dimensions | See detailed drawing; blade thickness 0.80 mm, overall blade width 6.30 mm |
| Pack sizes | 1, 2, 5, 10 or 20 switches |
These are supplier-provided specifications. Housing examples show different rating inscriptions, including 16(5)A at 250V AC and T125 markings; the drawing lists a −25°C to +75°C operating range. Use the rating on the supplied switch for the intended load and do not treat 16A as a guaranteed motor-load or DC rating. The supplier illustrations carry CE/CQC/CB markings, but independent certification documents were not supplied.
Selection and Installation
- Match contact action, terminal arrangement, mounting holes and actuator travel to the original part.
- For three-terminal versions, COM is common, NC is normally closed and NO is normally open; normal refers to the released actuator.
- Appliance heating, keep-warm, lid interlock and detection circuits differ. Use the equipment's own schematic rather than a generic rice-cooker wiring assignment.
- Disconnect power before fitting. Mains-powered equipment should be serviced by a qualified person; do not bypass protective interlocks.
Package Contents
The selected quantity of assembled KW7-0 switches in the selected contact configuration. Quantity means pieces per pack; shopping-cart quantity means the number of packs. Disassembled photos show internal construction only. Mounting screws, wires, connectors and equipment are not included.
Details
English versions of the supplier illustrations, with explanations and series-specific reference notes.
NO and NC Terminal Reference
English translation of the supplier comparison. The illustrated NO contact closes when pressed; the NC contact opens when pressed. Verify the actual terminal markings and continuity; certification markings shown have not been independently verified.
Dimensions and Technical Drawing
Dimensions are in millimetres. This supplier drawing depicts an NO circuit; select the required contact type separately. Mounting sketch calls out diameter 3.10 holes while the body view labels diameter 3.30 plus or minus 0.10; confirm fit against the actual part. The 4.80mm terminal dimension has a unilateral tolerance of +0.00/-0.05mm.
