The Telemecanique XCKN3903F12S66 is a compact plastic-body limit switch from the Osiswitch family, rated for 240 VAC at 3 A and 250 VDC at 0.1 A. That 0.1 A DC rating is the one to watch — it limits the switch to low-current DC signal circuits, not power switching on DC bus lines. PF 1/2 cable entry accepts standard metric or PG gland sizes common in European panels. The switch is designed to EN/IEC 60947-5-1 (control circuit devices) and EN/IEC 60204-1 (machinery safety), so it fits into CE-marked machine builds.
Telemecanique XCKN3903F12S66 Limit Switch, Compact, IP65, 24
MPNXCKN3903F12S66
Telemecanique Osiswitch XCKN compact limit switch, model XCKN3903F12S66, PF 1/2 cable entry, 240 VAC 3 A / 250 VDC 0.1 A contacts, IP65 plastic enclosure, UL/CSA approved.
$138.09Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Type | COMPACT |
| Connection type | PF 1/2 CABLE ENTRY |
| Enclosure | IP65 |
| Operating temperature | -32 TO 21 DEG F |
| Body material | PLASTIC |
| Approval | UL, CSA |
| Model | XCKN |
| Category | Medium Duty Limit Switches |
| Sub-Category | General/Heavy Duty Limit Switch |
| Contact rating | 240 VAC 3 AMPERE, 250 VDC 0.1 AMPERE |
| Manufacturer brand | Square D Co. |
| Product description | Telemecanique XCKN3903F12S66 Limit Switch |
| Additional information | APPLICABLE STANDARD EN/IEC 60204-1, EN/IEC 60947-5-1 |
| Full technical description | Compact Type; PF 1/2 Cable Entry Connection Type; 240 VAC 3 Ampere, 250 VDC 0.1 Ampere Contact Rating; UL, CSA Approval; IP65 Enclosure; Plastic Body Material; -32 to 21 Deg F Operating Temperature; OSISWITCH[R] Brand; Applicable Standard En/Iec 60204-1, En/Iec 60947-5-1; XCKN Model |
Product details
Frequently asked questions
What are the key electrical ratings for XCKN3903F12S66?
Contacts are rated 240 VAC at 3 A and 250 VDC at 0.1 A. The DC rating is the limiting factor — use it for signal-level DC loads only, not for switching DC motors or solenoids.
What approvals does this limit switch carry?
UL and CSA approvals are listed, covering North American installation requirements.
What is the enclosure protection class?
IP65, meaning dust-tight and protected against water jets. Suitable for washdown environments but not for submersion.
What standards does the XCKN3903F12S66 comply with?
It complies with EN/IEC 60204-1 (machinery safety) and EN/IEC 60947-5-1 (control circuit devices), supporting CE-marked machine builds.
MPN
XCKN3903F12S66