The JST UB-MC5ABR3-SD204-4S-TB NMP is a USB micro AB receptacle from the JST UB series, designed as the board-mount half of a micro USB connection.
10,000 Mating Cycles — Built for Frequent Connect / Disconnect
Standard micro USB connectors typically spec 5,000 to 10,000 cycles; this one sits at the high end, with the gold-over-nickel contact finish handling the wear without exposing base metal. The solder retention feature keeps the SMT pads anchored to the board through those repeated insertions, resisting the shear force from cable strain.
Current Rating Split — 1.8A on the Power Contact, 0.5A on Signals
The current rating is split across the contacts: 1.8A on one pin (the VBUS power line) and 0.5A or 1A on the others (the data and ID lines). That 1.8A is enough for a low-power device charging at USB 2.0 levels — think a handheld terminal or sensor node — while the 0.5A on the signal contacts keeps temperature rise in check on the fine-pitch SMT pads. The voltage rating of 30VAC/DC covers the 5V USB bus with generous margin.
Obsolete — Sourced Through Surplus or Broker Channel
JST lists the UB-MC5ABR3-SD204-4S-TB NMP as obsolete. The 5-contact micro AB pinout is standard, so a replacement from another manufacturer with the same footprint and mating interface is a viable alternative, but no direct cross-reference is documented here. Confirm the board footprint and mating plug before substituting.
Sourcing This Part
Because this part is obsolete, it is not held on the shelf.