The Siemens 3RT6926-2PA11 is a pneumatic time-delay relay block designed specifically for the 3RT6 series of motor contactors in size S0. It provides an adjustable on-delay of 10 to 180 seconds, with one normally-open and one normally-closed delayed switching contact. The block clips directly onto the contactor without tools, saving panel space and wiring time.
The auxiliary contact ratings are voltage-dependent: 4 A at 24 V, 2 A at 48 V, 0.7 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 4 A at 400 V, 0.15 A at 440 V, 2.5 A at 500 V, and 1.5 A at 690 V (–,). These are the maximum continuous currents the contacts can switch at each voltage level; for a 24 VDC PLC output driving a 4 A load, this block handles it, but at 440 V the same contact is limited to 0.15 A — a significant derating that matters when selecting for higher-voltage control circuits. The auxiliary contacts are rated for AC-12 duty at 10 A, and the short-circuit protection required is a gG 10 A fuse at 1 kA per IEC 60947-5-1.
AWG equivalents are 20–14 for auxiliary contacts.