Schneider Electric C400A811100 – Heavy‑Duty Limit Switch for Reliable Position Sensing

The Schneider Electric C400A811100 sits in that dependable class of heavy‑duty limit switches you install once and forget about for years. From my experience, the C400 family is chosen when you need a tough mechanical position sensor with clean, repeatable switching and strong sealing against dust, oil, and coolant. You might notice that it’s typically used on conveyors, packaging lines, and machine tools where a simple, durable contact is all you need—no external power, no protocol overhead.

Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: typically 1 week for in‑stock items; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• Heavy‑duty metal housing – Built to handle industrial shock, vibration, and aggressive fluids in many cases.
• Discrete snap‑action contacts – Typically 1 NO + 1 NC, delivering crisp switching and clear PLC input transitions.
• No external power required – Purely electromechanical; simplifies wiring and improves resilience.
• Industrial sealing – Designed for dusty, oily environments; appears to meet high ingress protection levels common to the C400 family.
• Stable repeatability – Good for homing, end‑of‑travel, or interlock detection where position accuracy is critical.
• Familiar form factor – Fits standard mounting on machine frames and guard doors with straightforward screw installation.

Technical Specifications

Application Fields

This model is a solid pick for discrete position detection and safety interlocking in:

• Conveyor end‑of‑travel and transfer stations
• Packaging machinery (cartoners, case packers, wrappers)
• Machine tools and indexing tables for homing and limit detection
• Material handling equipment and lift gates
• Door/guard position monitoring on industrial enclosures

A maintenance manager we worked with recently swapped older mixed‑brand switches for C400 units across a bottling line; nuisance faults dropped, and the team liked the consistent terminal layout and firm actuation feel.

Advantages & Value

• Reliability in harsh environments – Metal housing and sealed internals stand up to oil mist and washdowns.
• Compatibility – Works cleanly with standard PLC digital inputs; fits common mounting patterns.
• Lower lifecycle cost – No power supply needed; fewer failure modes than active sensors in many cases.
• Support and continuity – Schneider Electric’s long product lines help with replacements and future expansions.

Installation & Maintenance

• Mounting – Fix to a rigid, flat surface; ensure the actuator is contacted within rated overtravel limits.
• Wiring – Use ferruled leads; route through a conduit or cable gland; bond shield/ground per site standards.
• Cabinet/environment – Provide drip loops and strain relief; avoid constant mechanical side‑loading of the plunger/lever.
• Safety – De‑energize circuits before wiring; verify contact state on commissioning with a meter.
• Routine checks – Inspect actuation repeatability and mechanical play quarterly; clean exterior; retighten terminals.

Quality & Certifications

• Designed to meet CE requirements for low‑voltage switching devices
• UL and CSA recognition commonly available for C‑series limit switches
• RoHS compliant materials, with production under ISO 9001 quality systems
• Manufacturer’s warranty: 12 months (365 days)

If you’re consolidating part numbers, I can also suggest compatible Schneider actuator levers and boot kits that pair well with the C400 housing, so you keep the same mounting while tailoring the actuation style to your machine.