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EA170-32100 Danaher

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The Danaher EA170-32100 is a Snaplock Limit Switch featuring a double pole configuration with 2 normally open and 2 normally closed contacts made from silver alloy. It is built with a zinc and aluminum housing, supports long mounting, and operates counterclockwise with an overall torque of 23 in-lb. This switch is rated for 20 A at 125 Vac and 5 A at 125 Vdc.

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Product Description:

The EA170-32100 is a snap-action rotary limit switch built by Danaher for the Snaplock Limit Switches series. Installed on machinery shafts, it translates angular motion into discrete electrical signals that start, stop, or sequence equipment in automated lines. The front-mounted shaft positions the cam interface toward the accessible side of the machine, while the zinc and aluminum housing protects the internal contacts from common industrial contaminants and incidental impact.

The electrical stage uses a double-pole architecture with two normally open and two normally closed contacts, allowing control circuits to handle power and feedback paths simultaneously. Each normally open circuit can switch up to 20 A at 125 VAC, while DC applications are limited to 5 A at 125 VDC because direct-current arcs are more difficult to interrupt. Silver-alloy butt contacts resist pitting during repetitive operation. The Form Z contact geometry keeps the normally open and normally closed elements isolated, and neither pole shares a common terminal. This arrangement permits galvanic isolation between motor power circuits and low-level PLC inputs. The cam mechanism requires an operating torque of 23 in-lb and rotates only in the specified counterclockwise direction. It provides a total angular travel of 37°, and the cam reaches its trip point after 10° of rotation to produce a rapid state change for time-sensitive interlocks.

After actuation, the cam may continue to the recommended travel position of 13°, which keeps dwell forces low and helps extend contact life. Reset occurs when the shaft reverses to a clearance position of , allowing a narrow dead band without false reengagement. Long mounting slots simplify alignment when the switch is attached near a rotating machine member. The separated double-pole circuits can support independent control paths where electrical isolation is required. Its compact rotary mechanism is suitable for conveyor diverters, lift tables, indexing equipment, and other machinery that requires discrete angular position feedback.

Contact Arrangement
2 NO, 2 NC
Contact Form
Form Z
Contact Material
Silver Alloy
Contact Type
Butt
Current At 125 Vac
20 A
Current At 125 Vdc
5 A
Housing Material
Zinc/Al.
Mounting Style
Long Mounting
Operating Direction
CCW
Overall Torque
23 in-lb
Pole Configuration
Double Pole
Recommended Travel
13°
Reset Travel
Shaft Position
Front Shaft
Total Travel
37°
Trip Travel
10°

Frequently Asked Questions about EA170-32100:

Q: What is the contact arrangement of the EA170-32100 limit switch?

A: The EA170-32100 switch features a contact arrangement of 2 normally open and 2 normally closed contacts for versatile circuit control.

Q: What is the maximum current rating of the EA170-32100 at 125 Vac?

A: This model supports a maximum current of 20 A at 125 Vac, suitable for higher current applications.

Q: Where is the shaft located on the EA170-32100 limit switch?

A: The EA170-32100 comes with a front shaft position, making it accessible for direct connections.

Q: What materials are used in the housing of the EA170-32100 switch?

A: The housing of the EA170-32100 is constructed from a combination of zinc and aluminum for enhanced durability.

Q: What contact material does the EA170-32100 feature?

A: This snaplock switch uses a silver alloy for its contact material, providing reliable electrical conductivity.


Internal Product Review

  • ‘‘The EA170-32100 is a Danaher Snaplock limit switch with a double-pole Form Z contact arrangement. Silver alloy contacts and 20 A capacity at 125 Vac support clean switching performance in demanding control circuits. A 10° trip travel and 23 in-lb overall torque make the unit a precise and dependable choice for machine interlock service.’’

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