One kind of terminal block or connector that is frequently utilized in electrical and electronic applications is KF250NH-5.08. You seem to be referring to an 11-pin, double-row version of this connector, which is probably intended for a 5.08 mm pitch, based on the information you have given. KF250NH: This usually denotes the connector's or terminal block's model number or series. 5.08: This represents the pitch, or the 5.08 mm separation between the pins. Many terminal blocks, particularly those used in power or high-current applications, have this standard spacing. 11-pin: Indicates how many pins or connectors are in the block. Double Row: Shows that there are two rows of pins instead of just one. More connections may be possible as a result.