An apparatus for a circuit assembly, including two plates which are adapted to hold a circuit assembly, connected by a hinge, and including a hold-down adapted to interlock the circuit assembly to a plate, and a sliding lock adapted to secure the plates. Examples of the present subject matter include embodiments wherein the sliding lock secures the first plate and second plate in a first mode of operation, and releases the first plate in a second mode of operation, and wherein the hold-down interlocks the circuit assembly to the first plate in a first state of operation, and interlocks the circuit assembly to the second plate in a second state of operation. Further, the present subject matter includes a method for using a circuit carrier to hold a circuit assembly.