Limit switch with built-in Bestact contacts
(R25) for excellent environmental resistance.
(R25) for excellent environmental resistance.
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Limit Switches
Heavy Duty Industrial Limit Switch PSKU-□R25C□ PIKU-□R25C□ (Medium-Capacity Type)
▼Features
◼ These types of limit switches have been used for many years as position detection switches for cranes and trolleys in steel, chemical plant and cement manufacturing facilities.
◼ These limit switches use Bestact (R25) for the built-in contacts, and are hardly affected by environmental influences such as dust, gas, high temperature and high humidity, and have excellent contact reliability.
◼ These limit switches are suitable for a wide range of applications, from micro current circuits at signal level to power circuits for inductive load switching.
◼ These types of limit switches have been used for many years as position detection switches for cranes and trolleys in steel, chemical plant and cement manufacturing facilities.
◼ These limit switches use Bestact (R25) for the built-in contacts, and are hardly affected by environmental influences such as dust, gas, high temperature and high humidity, and have excellent contact reliability.
◼ These limit switches are suitable for a wide range of applications, from micro current circuits at signal level to power circuits for inductive load switching.
PIK□ series and PSK□ series with air contacts built into the ▼ contact section are also available.
Please consider this when you need to directly control equipment with a large load capacity. For details, please download the catalog from here.
If the installation location is in an environment with corrosive gas or humidity that may cause contact failure of the air contacts, consider the PSKU-□R25C□□ and PIKU-□R25C□□ models with built-in Bestact contacts on this page.
Please consider this when you need to directly control equipment with a large load capacity. For details, please download the catalog from here.
| AC100-110V 10A | AC200-220V 10A | AC400-440V 5A | AC500-550V 3A |
| DC100-110V 3A | DC200-220V 2A |
If the installation location is in an environment with corrosive gas or humidity that may cause contact failure of the air contacts, consider the PSKU-□R25C□□ and PIKU-□R25C□□ models with built-in Bestact contacts on this page.
▼Warning about this counterfeit products
In recent years, it has been reported that many counterfeit products of our products have been found in many places around the world, especially in the East Asia region. These counterfeit products are being handled by companies that are not our sales representatives or authorized distributors, or through Internet trading sites in which we are not involved.
Please check here for details.
In recent years, it has been reported that many counterfeit products of our products have been found in many places around the world, especially in the East Asia region. These counterfeit products are being handled by companies that are not our sales representatives or authorized distributors, or through Internet trading sites in which we are not involved.
Please check here for details.
Ratings and Specifications
Actuator options | Roller Lever | Cylindrical Roller Lever ( Horizontal Mounting ) | Cylindrical Roller Lever ( Vertical Mounting ) | Pull Lever | Pull Lever ( Crane Drum Over-Winding Protection ) | Fork Lever | Pull Lever ( One Direction Pull ) | Pull Lever ( Both Direction Pull ) | |
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Type | PSKU-□R25C | PSKU-□R25CB | PSKU-□R25CV | PSKU-□R25CE | PSKU-□R25CO | PSKU-□R25C | PIKU-□R25CE | PIKU-□R25CET22 | |
Switch Action | Spring return | Maintained | |||||||
Contact Arrangement | 2NO, 1NO1NC, 2NC | 2NO *⁷, 1NO1NC | 2NO, 1NO1NC, 2NC | ||||||
Built-in Contact Type (Bestact) | |||||||||
Contact Performance | Rated Operational Current （Inductive Load） | 240VAC 0.5A（50/60Hz）, 115VDC 0.3A（L/R=40ms） | |||||||
Minimum Operational Power Ratings | 24VDC 1mA Failure Rate λ₆₀＝4.6×10⁻⁹（/time）or less | ||||||||
Initial Contact Resistance | 500mΩ or less（6VDC 1A） | ||||||||
Rated Insulation Voltage | 250VAC（50/60Hz） | ||||||||
Insulation Resistance | 10MΩ or greater (with 500VDC Megger) | ||||||||
Withstand Voltage | Across open contacts: 500VAC, 1 min (50/60Hz) Between live parts and ground: 1500VAC, 1 min (50/60Hz) | ||||||||
Vibration Resistance | Malfunction : 9.8m/s²（1G）（10～100Hz） | ||||||||
Shock Resistance | Malfunction : 59mm/s²（6G）,Destruction : 980mm/s²（100Ｇ） | ||||||||
| Operating Temperature | -10℃ to +80℃ (With no freezing or condensation) | ||||||||
Storage Temperature | -20℃ to +80℃ (With no freezing or condensation) | ||||||||
Degree of Protection | Equivalent to IP56 | ||||||||
Maximum Recommended Speed of Actuation | 100m/min *⁸ | ||||||||
| Operating Frequency | 1200 times/hour | ||||||||
Mechanical Life | 5,000,000 operations or greater | ||||||||
Lead-in Method | G 1/2 (13 diameter hole) | ||||||||
Approx. Weight | 2kg | 4kg | 4kg | 2kg | 5kg | 2kg | 2kg | 2.5kg | |
Note:
1. The □ part of the type varies depending on the contact configuration: "200" for 2NO contacts, "020" for 2NC contacts, and "110" for 1NO1NC contacts.
2. Do not modify NO contacts to NC contacts or NC contacts to NO contacts.
3. For DC circuits, connect (+) to terminals with odd numbers and (−) to terminals with even numbers.
4. The contact performance specifications refer to the built-in contacts.
5. The rated operational current indicates the current value to be used under the rated operational voltage and specified conditions (make and break current, switching frequency, and electrical endurance).
For 240VAC: The setting is based on 10× make (cosφ = 0.6–0.7) and 1× break (cosφ = 0.3–0.4). A rated operational current of 1A means 10A for making and 1A for breaking. For 115VDC: The setting is based on 1× make and 1× break, specified for inductive loads (L/R = 40ms).
6. Temperature characteristics are values under conditions without freezing or condensation.
*7. For the 2NO contact configuration, please specify the operating direction. Clockwise ON: type suffix R / Counterclockwise ON: type suffix L.
*8. For Pull Lever (Crane Drum Over-Winding Protection) type, there are no specific speed limits, but please ensure the weight can travel to the mechanical limit. If it stops before reaching this limit, design the circuit so that an OFF contact will not re-engage due to vibration.For the Fork Lever type, the minimum operating speed varies by application. Please contact us for details.
1. The □ part of the type varies depending on the contact configuration: "200" for 2NO contacts, "020" for 2NC contacts, and "110" for 1NO1NC contacts.
2. Do not modify NO contacts to NC contacts or NC contacts to NO contacts.
3. For DC circuits, connect (+) to terminals with odd numbers and (−) to terminals with even numbers.
4. The contact performance specifications refer to the built-in contacts.
5. The rated operational current indicates the current value to be used under the rated operational voltage and specified conditions (make and break current, switching frequency, and electrical endurance).
For 240VAC: The setting is based on 10× make (cosφ = 0.6–0.7) and 1× break (cosφ = 0.3–0.4). A rated operational current of 1A means 10A for making and 1A for breaking. For 115VDC: The setting is based on 1× make and 1× break, specified for inductive loads (L/R = 40ms).
6. Temperature characteristics are values under conditions without freezing or condensation.
*7. For the 2NO contact configuration, please specify the operating direction. Clockwise ON: type suffix R / Counterclockwise ON: type suffix L.
*8. For Pull Lever (Crane Drum Over-Winding Protection) type, there are no specific speed limits, but please ensure the weight can travel to the mechanical limit. If it stops before reaching this limit, design the circuit so that an OFF contact will not re-engage due to vibration.For the Fork Lever type, the minimum operating speed varies by application. Please contact us for details.
Dimensions (㎜)
