Siemens D130 UL Classified Replacement Square D &ldquo;QO&rdquo; Circuit Breaker, 1-Pole 30-Amp Siemens classified circuit breaker type qd by Siemens energy and automation. Replacement for square d type qo. 10,000 aic. 1-Pole, 30A. Ul listed. 1 Pole, 30 Amp Type QD for use in Square D QO load centers Requires one 3/4-inch space UL Classified for Square D panels, directly replaces QO130