It's used in high temperature environment for a long time without failure from oxidization or pollution.

Characteristics:

  Temperature 250 °C  Double circuit limit switch, widely used  The one with solid cast aluminum housing  High mechanical strength  Resistant to oil, water & pressure  Easy to maintenance   Easy to use  Mechanical life is long

 Summary:

The interior part: fully sealed high temperature contact switches whose maximum allowable current is 5A/AC 220V. Since the contact is suffered special treatment, 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. Every switch has roller, adjustable rod, pressure plunger to meet your different need. It’s widely used in electrical, chemical, petroleum, textiles, steel and other industries.

Specification:

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

Technical Parameters:

Operating speed : 0.5mm to 50cm / sec Frequency mechanical movement: 120 beats / min, electrical: 30 beats / min Contact resistance:  25m Ω or less (initial) Insulation resistance: 100m Ω above (under the 500VDC)  1000VAC, 50/60HZ for 1 minute (same polarity)Withstand voltage:     No-load current and load current between parts: 1500VAC, 50/60 HZ for 1 minute     Between each terminal and ground: 1500VAC, 50/60 HZ for 1 minute Vibration 10-55HZ, 1.5mm double amplitude The impact of mechanical durability: 1, 000m / Sec 2 (about 100G 'S more) Malfunction: 300m / Sec 2 (about 30G 'S more) Ambient temperature -10 °C to + 250 °C Humidity <95% RH Service life of mechanical durability l: 15,000,000 times Electrical: 500,000 times Weight of about 275g Degree of protection IP67

Honeywell High Temp Resistant Limit Switch