Description
The CNTD TZ-8166 limit switch from the TZ-8 series is an industrial mechanical switch with a spring and a plastic rod, designed for precise detection of end positions, stops and linear movement. Thanks to the straight spring, it is ideal for applications with limited space, where high switching repeatability and reliable operation are required even under frequent mechanical stress.
Technical specifications
Type: mechanical limit switch
Model: TZ-8166
Contact arrangement: 1× NO + 1× NC (double circuit)
Contact resistance: max. 25 m
Insulation resistance: min. 100 M (at 500 VDC)
Dielectric strength: 1500 VAC / 1 minute
Operating speed: 5 mm/s to 0.5 m/s
Mechanical life: up to 1,000,000 cycles
Electrical life: more than 500,000 switching cycles
Operating temperature: -20°C to +70°C
Relative humidity: max. 95% RH
Protection: IP65
Body dimensions: 29 × 27 × 175 mm
Weight: 135g
Rated voltages and currents
| Resistive (AC) | 125VAC | 5 A | 5 A |
| 250VAC | 5 A | 5 A | |
| Resistive (DC) | 830 VDC | 5 A | 5 A |
| 125 VDC | 0.4A | 0.4A | |
| 250 VDC | 0.2A | 0.2A | |
| Induction (AC) | 125VAC | 3 A | 3 A |
| 250VAC | 3 A | 3 A | |
| Inductive (DC) | 830 VDC | 4 A | 4 A |
| 125 VDC | 3 A | 3 A | |
| 250 VDC | 3 A | 3 A | |
| Surge current | 12 A | 24 A |
Functions and features
Straight spring for precise and repeatable engagement
High sensitivity with small stroke
Double spring contact mechanism for long life
Sturdy aluminum alloy and reinforced plastic housing
Water, dust and oil resistant (IP65)
Grommet design for easy cable connection
Suitable for both AC and DC circuits
Ideal for
Industrial automation
Conveyor and positioning systems
CNC machines and machining equipment
Assembly and packaging machines
Detection of end positions and stops
Package contents
Limit switch CNTD TZ-8166
Why choose this product?
Proven industrial series CNTD TZ-8
High reliability and long service life
Precise switching even with small strokes
Universal use in a wide range of applications
Stable parameters and quality construction






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