Description
Micro Switch 9125 4AC2 Industrial Snap Action Limit Switch S5-NO S5A-NO
The Micro Switch 9125 is a compact snap-action limit switch manufactured by Micro Switch (Freeport, IL, USA) — a division now operating under Honeywell. This example carries the variant designation 4AC2 stamped on the mounting plate and is fitted with three pre-wired leads labeled S5A-NO, S5-NO, and S5-COM, indicating a normally-open contact configuration with a shared common. The assembly includes a spring-loaded plunger and roller actuator mechanism mounted to a metal bracket chassis.
Specifications & What's Included
- Brand: Micro Switch (Freeport, IL USA) — Honeywell division
- Model: 9125
- Variant / Sub-type: 4AC2 (stamped on plate)
- Type: Snap-action limit switch
- Contact configuration: Normally Open (NO) with Common (COM)
- Wire lead labels: S5A-NO (normally open), S5-NO (normally open), S5-COM (common)
- Actuator: Spring-loaded plunger and roller mechanism
- Construction: Metal mounting plate / bracket assembly with two sub-switch bodies
- Mounting: Panel or bracket mount via base plate
- Country of manufacture: United States
Applications
Snap-action limit switches of this type are standard components in industrial automation and machine control systems, where they detect the position, travel limit, or presence of a moving part and trigger a control circuit response. The Micro Switch brand — one of the most recognized names in electromechanical switching — produced these switches for a wide range of applications including conveyor systems, actuators, robotic positioning equipment, machine tool end-stops, and general factory automation. Multi-lead normally-open configurations like this 9125 4AC2 are commonly wired into relay logic or PLC input circuits. Micro Switch components from this era (mid-to-late 20th century) were manufactured to high mechanical durability standards and remain in service in legacy industrial systems, as well as in retrofits and repairs where original-spec switching is required.
This Micro Switch 9125 (4AC2) snap-action limit switch has been inspected and appears to be in good used condition. It was pulled from a working environment where it was previously in service. The metal mounting plate and switch bodies show light surface wear consistent with industrial use. Wire leads are intact and labeled (S5-NO, S5A-NO, S5-COM). No broken or missing hardware is visible. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Micro Switch |
Model: |
9125 |
MPN: |
9125 |
Secondary Model: |
4AC2 |
Type: |
Snap Action Limit Switch |
SKU: |
41942 |
Switch Configuration: |
Normally Open (NO) |
Wire Lead Labels: |
S5-NO, S5A-NO, S5-COM |
Actuator Type: |
Spring-loaded plunger / roller mechanism |
Contact Type: |
Normally Open (NO) and Common (COM) |
Mounting: |
Panel / bracket mount |
Form Factor: |
Compact electromechanical assembly |
Country/Region of Manufacture: |
United States (Freeport, IL) |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Includes wire leads labeled S5-NO, S5A-NO, and S5-COM |
Application: |
Industrial automation, machine control, position sensing |
Condition Notes: |
Micro Switch 9125 (4AC2) snap-action limit switch. Used, pulled from a working environment. Inspected and in good condition. Wire leads intact and labeled. Light surface wear. Please view photos and contact us with questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
