The Ultimaker Limit Switch with red wire for the UM3 and UM3 Extended is the original end-stop switch for the axis home position identified by the red wire colour in the UM3 wiring system. End-stops establish the reference home position from which all axis movements and print coordinates are calculated. A failed or intermittent switch results in homing failures, axis collisions or incorrect print positioning.

This red-wire variant is the correct replacement for the UM3 axis end-stop position that uses red-coded wiring. Replacing a worn or failed switch with this genuine Ultimaker part restores accurate homing performance and protects the printer mechanics from over-travel damage. For the blue-wire variant, see 210000002053.

Key features

• Genuine Ultimaker OEM limit switch for accurate axis homing on UM3 and UM3 Extended.
• Red wire identification for the correct axis position in the UM3 wiring system.
• Restores reliable end-stop detection and accurate print start positioning.
• Prevents axis over-travel and mechanical damage from a failed or absent end-stop signal.
• Also available with blue wire (210000002053) for the complementary axis end-stop position.

Compatible with: Ultimaker 3, Ultimaker 3 Extended