Up for sale is an obsolete SQUARE D Q1B350 (SQUARE D A1B350) 50 AMP, 3 POLE, 240 VOLT MOLDED CASE THERMAL MAGNETIC TRIP CIRCUIT BREAKER for use with Square D / Schneider Electric 'Type Q1B / A1B' Enclosures and Loadcenters (Cat No: SQD Q1B350 or SQD A1B350, 2 or 3 Pole, 40ºC, CU-AL, 240V AC, 125/250V DC) ~ please feel free to email me for price, pick-up or shipping information.