The Siemens SIRIUS 3RV1928-1H is a Type E terminal block designed for Size S0 circuit breakers, providing the increased air clearances and creepage distances required for self-protected combination motor controllers per UL 508 (Type E). It accepts solid conductors up to 2x 10 mm² and stranded up to 2x 16 mm² (or 1x 25 mm²), with a maximum ampacity of 40 A. The insulation voltage is rated 690 V AC at pollution degree 3.
Designed for Size S0 circuit breakers, the 3RV1928-1H mounts directly on the breaker's line or load side. Dimensions are 44.8 mm wide, 38.9 mm high, and 73.6 mm deep. Screw-type terminals accept a wide range of conductor sizes: solid 2x (1–10 mm²), stranded 2x (2.5–16 mm²) plus 1x (1.5–25 mm²), and with core-end processing 1x (1–16 mm²) or 2x (1–10 mm²).