high temperature resistant limit switch

Specifications

Double circuit limit switch
High mechanical strength
Endure above 200 degrees temperature
Easy to maintenance
long life span

 

Introduction:

The interior part adopts fully sealed high temperature contact switches whose maximum allowable current is 5A/AC 220V. Since the contact is specially processed,  it can be used in high temperature environment for a long time without failure from oxidization or pollution.

 

The highest temperature of JDHK-2 series is 350 °C, while the long term working temperature is 250 °C.

As for JDHK-3 series, The highest temperature is 650 °C, while the long term working temperature is 550 °C.

It has filled the domestic blank of ultra-high temperature switch field.

 

Construction:

Every switch has roller, adjustable rod, pressure plunger to meet your different need.  

 

Application:

It’s widely used in electrical, chemical, petroleum, textiles, steel and other industries.  

 

Characteristics:

1. Temperature 250 °C
2. Double circuit limit switch, widely used
3. The one with solid cast aluminum housing
4. High mechanical strength
5. Resistant to oil, water & pressure
6. Easy to maintenance 
7. Easy to use
8. Mechanical life is long

 

 

 

Specification:

1. Operating speed : 0.5mm to 50cm / sec
2. Frequency mechanical movement: 120 beats / min, electrical: 30 beats / min
3. Contact resistance:  25m Ω or less (initial)
4. Insulation resistance: 100m Ω above (under the 500VDC)  1000VAC, 50/60HZ for 1 minute (same polarity)
Withstand voltage: 
5.  No-load current and load current between parts: 1500VAC, 50/60 HZ for 1 minute 
6. Between each terminal and ground: 1500VAC, 50/60 HZ for 1 minute
7. Vibration 10-55HZ, 1.5mm double amplitude
8. The impact of mechanical durability: 1, 000m / Sec 2 (about 100G 'S more)
9. Malfunction: 300m / Sec 2 (about 30G 'S more)

 

Using conditions:
1. Ambient temperature -10 °C to + 250 °C
2. Humidity <95% RH

 

Electrical Parameters:
1. Service life of mechanical durability l: 15,000,000 times
2. Electrical: 500,000 times
3. Weight of about 275g
4. Degree of protection IP67

 

Rated Votage	Non-inductive Load( A )				Inductive Load ( A )
(V)	Resistive Load		Bulb Load		Inductive Load		Motor Load
	NC	NO	NC	NO	NC	NO	NC	NO
125VAC	10		3	1.5	10		5	2
250VAC	5		2	1	5		3	1
480VAC	3		1.5	0.8	3		1.5	0.8
600VAC	1		1	0.5	1.5		1	0.5
8VDC	10		6	3	10		6
14VDC	10		6	3	10		6
30VDC	6		4	3	6		4
125VDC	0.8		0.2	0.2	0.8		0.2
250VDC	0.4		0.1	0.1	0.4		0.1

 

 

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