The small transformers covered by this specification are intended for use in the following applications:

Type IL transformers are intended for 6-volt power supply for indicator lamps on switchboard such as the bull's-eye type. These transformers are also used in ordnance applications.

Type CC transformers are intended for use in control circuit applications such as zeroing synchros and input to closing coils for circuit breakers and contactors, where the proper voltage for these appliances is not directly available on the bus.

Type SL transformers are intended for use in ordnance applications, specifically for illumination of gun sights, for instrument illumination, and for Bureau of Ships interior communication and fire control applications.

Type GF transformers are intended for use in gun, torpedo, rocket, and depth charge firing systems.

Type PR transformers are intended for use as anode transformers, interphase transformers, cathode transformers, auxiliary transformers in power rectifiers of the tube type, and metallic cell rectifiers.

Type TF transformers are intended for use in isolation of grounds in torpedo firing circuits.

Type SA transformers are intended for use as internal components of equipment and having performance characteristics, mounting and size most suited for the specific application.