The Hirose DF56-50P-0.3SD(51) is a 50-position plug from the DF56 series, designed for terminating micro-ribbon cable in ultra-compact consumer and portable electronics. The 0.30 mm pitch packs 50 circuits into a single row, making this the highest-position-count member of the DF56 line. Gold-plated contacts with 3.94 µin thickness handle the low-current signal paths typical of these applications. The free-hanging (in-line) body with a detent lock mates with the corresponding DF56 series receptacle, creating a positive-latch connection that resists accidental disconnect in handheld devices. The 42-46 AWG wire range means it's paired exclusively with fine-gauge ribbon cable or micro-coax — not standard discrete wiring.
At 50 positions, this is the widest DF56 plug available. The 40-position DF56-40P-0.3SD(51) shares the same 0.30 mm pitch, gold plating, and wire gauge range but drops 10 circuits. If your design needs fewer than 50 signal lines, the 40-position variant saves board edge real estate without changing the connector family or tooling. The 30-position DF56-30P-0.3SD(51) is another drop-in option for lower circuit counts, identical in all other specs. No other DF56 plug carries 50 positions — this is the top of the range for this pitch class.
Wire Gauge and Termination Reality
This connector accepts 42-46 AWG wire — that's hair-thin, typically found in micro-coaxial assemblies for camera modules, medical imaging cables, or flex-to-board interconnects. The solder termination requires a steady hand and magnification; a dedicated Hirose crimp tool is specified for the DF56 series contacts. Standard wire strippers won't handle 46 AWG without damaging the conductor. The ribbon cable wire type means the plug is pre-loaded onto a flat flexible cable assembly, not field-terminated one wire at a time. Plan for factory termination rather than field repair.