CZ Micro Switch

A micro switch, also known as snap-action switch, is a generic term used to refer to an electric switch that is actuated by very little physical force, through the use of a tipping-point mechanism. They are very common due to their low cost and durability, greater than 1 million cycles and up to 10 million cycles for heavy duty models. This durability is a natural consequence of the design. Internally a stiff metal strip must be bent to activate the switch. This produces a very distinctive clicking sound and a very crisp feel. When pressure is removed the metal strip springs back to its original state. Common applications of micro switches include the door interlock on a microwave oven, levelling and safety switches in elevators, vending machines, and to detect paper jams or other faults in photocopiers. Micro switches are commonly used in tamper switches on gate valves on fire sprinkler systems and other water pipe systems, where it is necessary to know if a valve has been opened or shut.
The defining feature of micro switches is that a relatively small movement at the actuator button produces a relative large movement at the electrical contacts, which occurs at high speed (regardless of the speed of actuation). Most successful designs also exhibit hysteresis, meaning that a small reversal of the actuator is insufficient to reverse the contacts; there must be a significant movement in the opposite direction. Both of these characteristics help to achieve a clean and reliable interruption to the switched circuit.

CS Series

CM Series

CZ Series

Features

Virous of actuators, the operation position is adjustable. (such as CZ-7121).

Outer shell covered with intensive plastic, water-proof and oil-proof.

The mechanical strength is better than CM type of micro swith, bear hitting.

Contact Form

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Ratings

Rated Voltage (V)	Noninductive Load (A)					Inductive Load (A)
	Resistance Load		Lamp Load			Inductive Load		Motor Load
	NC	NO	NC	NO		NC	NO	NC	NO
125VAC 250VAC 480VAC	10 10 3		3 2.5 1.5		1.5 1.25 0.75	10 10 2.5		5 3 1.5	2.5 1.5 0.75
8VDC 14VDC 30VDC 125VDC 250VDC	10 10 8 0.5 0.25		3 3 3 0.4 0.2		1.5 1.5 1.5 0.4 0.2	6 6 6 0.05 0.03		6 6 5 0.05 0.03	5 5 2.5 0.05 0.03

NOTES:

1. Inductive load has a power factor of 0.4 min.(AC) and a time constant of 7 msec.max.(DC).
2. Lamp load has an inrush current of 10 times the steady-state current,while motor load has an inrush current of 6 times the steady-state current.

Characteristics

Operation speed	0.5mm-50cm/sec
Operating frequency	Mechanical: 120 operations/min.
	Electrical: 30 operations/min.
Contact resistance	15mΩ max. (initial value)
Insulation resistance	100mΩ min. (at 500VDC)
Dielectric strength	1000VAC, 50/60HZ for 1 minute between terminals of the same polarity
	1500VAC, 50/60 HZ for 1 minute between currentcarrying and non-current-carrying metal parts
	1500VAC, 50/60 HZ for 1 minute between each terminal and ground
Vibration frequency	10-55HZ,1.5mm double amplitude
Shock	Mechanical durable: 1, 000m/Sec2 (about 100G'S) Malfunction: 300m/Sec2 (about 30G'S)
Ambient temperature	-5℃ to +65℃
Humidity	<95% RH
Life	Mechanical: 10,000,000 operations above (under rated OT) Electrical: 500,000 operations above
Weight	About 60g
Degree of protection	IP65

Operating characteristics

Models	CZ-7100	CZ-7110	CZ-7310	CZ-7311	CZ-7312	CZ-7120
OF Max.	600g	600g	600g	600g	600g	150g
RF Min.	100g	100g	100g	100g	100g	40g
PT Max.	2.0mm	2.0mm	2.0mm	2.0mm	2.0mm	13.5mm
OT Min.	0.8mm	5.0mm	6.0mm	6.0mm	6.0mm	4.0mm
MD Max.	0.8mm	0.8mm	0.8mm	0.8mm	0.8mm	3.2mm
OP	30.5 ±0.8mm	44 ±1.2mm	21.8 ±1.2mm	33.3 ±1.2mm	33.3 ±1.2mm	25 ±1mm
FP						35mm

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Models	CZ-7140	CZ-7121	CZ-7141	CZ-7124	CZ-7144	CZ-7166
OF Max.	220g	180g	240g	200g	280g	120g
RF Min.	60g	50g	80g	60g	100g
PT Max.	8.5mm	11.0mm	6.5mm	11mm	6.5mm	250mm
OT Min.	2.5mm	3.0mm	2.0mm	3.0mm	2.0mm	11mm
MD Max.	2.0mm	2.4mm	1.5mm	2.4mm	1.5mm
OP	25 ±1mm	40 ±1mm	40 ±1mm	50 ±1.2mm	50 ±1.2mm
FP	32mm		46mm		56mm