EA170-51100

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The Danaher EA170-51100 is part of the Snaplock Limit Switches series and features a rugged Zinc/Aluminum Zinc housing material. It boasts an operating torque of 23 in-lb, a continuous current rating of 5A at 600V, and adjustable lever increments up to 360° for reverse shaft configurations. The switch includes 2 N.O. and 2 N.C. contacts.

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Product Description:

The EA170-51100 Switch is designed for industrial automation applications by Danaher and it comes under the series of Snaplock Limit Switches which ensures reliable operation across varied voltage ratings.

The EA170-51100 switch can handle various voltage and current ratings which indicate its capability to be used in industrial or high power applications. The amount of force required to actuate the switch’s lever mechanism is 30 inch/lbs which suggests that it requires a moderate amount of force to be triggered and prevents accidental activation. It is suitable for environments where temperature falls between -20°C to +90°C which makes it versatile for industrial as well as outdoor use. This limit switch actuation shaft is positioned in the reverse orientation compared to a standard configuration which may impact installation and compatibility with mechanical linkages. The angular movement required to trigger the switch is 10° which means the actuator must be moved by at least this angle before the switch operates which ensures precise control in applications that require accurate position sensing. The efficiency of the electrical load which the switch is controlling is between 75 to 100% which means it is suitable for resistive or slightly inductive loads which ensures minimal energy loss during operation.

This EA170-51100 limit switch is operated using a lever mechanism which is common in industrial and mechanical applications where physical objects or cams push against the lever to trigger the switch. It does not come with pre attached wires and instead it has screw terminals or other connection points which allows the user to attach their own wiring based on application requirements. It has a broader mounting base which makes it more stable and easier to install.

Ambient temperature rating
Up to +90 °C ambient
Contact configuration
2 N.O. + 2 N.C. contacts
Contact design
Butt silver-alloy contacts, Form Z
Electrical ratings
5 A@125 V DC; 1.5 A@250 V DC; 5 A@600 V AC
High-temperature version range
+20 °C to +180 °C
Housing material
Zinc/aluminum alloy
Low-temperature version range
–40 °C to +90 °C
Mounting options
Standard, wide & reverse shaft
NEMA enclosure rating
Types 1, 4 & 13
Operating torque
23 in·lb (without return spring)
Power factor
75 – 100 %
Reverse shaft lever adjustment
360° in 7°30' increments
Shipping weight
3.5 lb (std) / 4 lb (alt)
Standard shaft lever adjustment
7°30' increments up to 167°

Frequently Asked Questions about EA170-51100:

Q: How does the reverse shaft position of the EA170-51100 switch impact its functionality?

A: The reverse shaft position allows for alternative mounting configurations, making it adaptable to different industrial setups. This enhances compatibility with custom mechanical linkages and automation systems.

Q: Why is the 10° trip travel important in the EA170-51100 limit switch?

A: The 10° trip travel ensures precise actuation, preventing false triggering in automation processes. This feature is crucial for applications requiring accurate position sensing and motion control.

Q: How does the 30 inch/lbs torque rating improve the EA170-51100 switch’s performance?

A: The 30 inch/lbs torque requirement ensures controlled activation, reducing unwanted actuation due to minor vibrations. This enhances durability and reliability in high-motion industrial environments.

Q: What is the benefit of having a power factor between 75-100% in EA170-51100?

A: A high power factor means improved electrical efficiency and minimal energy loss. This ensures the switch operates effectively in resistive and slightly inductive load applications.

Q: Why is a wide mounting base important in the EA170-51100 switch?

A: The wide mounting base enhances stability and reduces mechanical stress during operation. It helps in securing the switch firmly in high-vibration industrial environments.


Internal Product Review

  • ‘‘The EA170-51100 limit switch by Danaher delivers high-performance operation with a lever actuation method and a 10° trip travel for precise control. Its torque rating of 30 inch/lbs ensures reliable activation while preventing accidental triggers. With a versatile -20°C to +90°C temperature range and screw terminals for custom wiring, it is a robust choice for industrial applications.’’

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