The Siemens 3RT2926-2PA01-0MT0 is a SIRIUS pneumatic timing relay block — a slow-operating, ON-delay accessory designed to clip onto size S0 contactors (3RT2 series). It provides an adjustable pickup delay from 0.1 to 30 seconds with a stated relative accuracy of 20% of the set value, and switches one normally-open plus one normally-closed auxiliary contact. The block is rated for AC-12 duty at 10 A maximum, with voltage-dependent current ratings that drop as line voltage rises: 6 A at 230 V, 4 A at 400 V, 2.5 A at 500 V, and 1.5 A at 690 V. At 24 V it handles 4 A; at 48 V, 2 A; at 110 V, 0.7 A; at 220 V, 0.3 A; and at 440 V, only 0.1 A. These are the switching capacities for the auxiliary contacts under the respective voltages — the 10 A AC-12 figure is the thermal current limit for resistive loads. Mechanical service life is rated at 5,000,000 switching cycles typical when mounted on a 3RT2 contactor. The block is finger-safe (IP20 on the front), mounts in any position via clip-on fastening, and uses screw-type terminals.
The block clips directly onto a size S0 contactor (3RT2 series) — no DIN rail footprint of its own. Overall dimensions are 45 mm wide, 44.6 mm high, and 83.5 mm deep.