Ironwood Electronics SBT sockets are small footprint sockets that are compatible with other product lines such as GHz elastomer sockets, Giga-Spring sockets, etc. The socket needs about 2.5mm extra space around the chip than the actual chip size, utilizing only very small PCB real estate. A heat sink screw on the top provides the compression force as well as thermal relief and can be customized to dissipate more power. The SBT socket uses SBT contact technology for high endurance and wide temperature applications. Solutions are available for 0.4mm to 1.27mm LGA, BGA, QFN, QFP, SOIC and other packages. The contact technology has a 3-part system which includes top plunger, bottom plunger and a spring.
Typical specifications for the SBT contact technology include: 5.2GHz - 21.9GHz bandwidth @-1dB, contact resistance under 15mOhm, self-inductance 0.88 - 0.95nH, capacitance under 0.3pF, operating temperature range -55C to +180C, insertion/extraction life over 500,000 cycles, current rating at 80C temperature rise is 4A - 8A per pin.