The latest PKB-A series eighth-brick dc/dc converter delivers 30A/125W, reportedly with high efficiency throughout the operating range. The series comprises two models: the PKB 4111A (5V/25A) and the PKB 4910A (3.3V/30A). Both are available for surface-mount use as SI versions and through-hole assembly as PI versions.  At its nominal voltage (48V) at 50% load, the PKB 4111A (5V) has a typical efficiency of 93.1% and 92.3% at full load while the PKB 4910A (3.3V) offers 92.7% at 50% load and 91.0% at full load. In OEM quantities, the PKB-A is priced at $24 each. ERICSSON INC., Plano, TX. (972) 583-6910/-5254.