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. |
