The JST 20RF-JMCS-G-1B-TF(N)(LF)(SN) is a 20-position receptacle from the JMC series, using a center strip contact arrangement on a 0.020" (0.50mm) pitch in a dual-row layout. It's a surface-mount board-to-board connector designed for dense PCB stacking where every millimeter of board real estate counts. The gold contact finish handles the repeated mating cycles typical of portable electronics or modular board assemblies without fretting corrosion.
Key Assembly Features
Two built-in features save you from common SMT headaches: a board guide that nudges the part into alignment during pick-and-place, and solder retention pads that hold it flat through reflow so it doesn't tombstone. The 0.130" (3.30mm) height above board keeps the stack low for tight enclosures.
Lifecycle Reality — This Part Is Obsolete
JST has marked the 20RF-JMCS-G-1B-TF(N)(LF)(SN) as Obsolete. That means the factory no longer builds it, and the usual distribution channel won't carry it as a stocked line item. No official replacement part number has been published by JST for this exact order code.
Sourcing This Part
Because the part is obsolete, there's no standard lead time or shelf stock. We locate available inventory through our independent distribution network and quote each request individually. Submit an RFQ with your target quantity and we'll confirm what's out there and at what price.