Eaton 10250T45 Special Function Contact Block

The 10250T45 is a 2LONC block: two late opening normally closed contacts. Both contacts are closed at rest and break late in the operator's travel, which is how you sequence one circuit to drop after another on the same pushbutton or selector switch. If you need standard NO/NC timing, this is the wrong block, it is a special function unit.

Up to six blocks can be stacked unless the operator specifies otherwise. That is the limit to plan around when you are building a multi-circuit station behind a single button.

Pressure terminals. You land bare conductors under the clamp and tighten, no ring lugs or spade terminals needed.

10250T45. It is the 10250T series special function block carrying two late opening NC contacts, and that is the number to quote when ordering or cross-referencing.

Late opening contacts break after the standard contacts in the same stack, so you get a built-in sequence from one operator, for example dropping a control circuit before an interlock or holding a seal-in an instant longer. The 10250T45 provides two such NC contacts in one heavy-duty 30.5 mm block. A standard block gives you no timing offset at all.