Struthers-Dunn A311XBXP132 Plug-in Relay 120V AC

The Struthers‑Dunn A311XBXP‑120VAC is a DPDT sequencing (stepper) plug‑in relay in the 311 Series, designed for memory‑enabled sequence control with no continuous voltage required for memory. It uses a 120 VAC coil and mates with the 27390D socket, delivering two Form C (DPDT) contacts rated 5 A for resistive loads at 125/250 VAC and 5 A at 28 VDC, with a nominal coil power of 4.9 VA (AC) or 1.8 W (DC). The plug‑in unit features a clear polycarbonate enclosure, a hold‑down clip integral to the base, and mounting compatibility with Struthers‑Dunn’s plug‑in sockets; operating temperature ranges from ‑20 to 60 C, with storage from ‑40 to 105 C, and it weighs about 7.5 oz (190 g). Key performance specs include an operate time of up to 35 ms, a drop‑out voltage of 10% of nominal, 1500 Vrms dielectric strength across open contacts and between insulated points, and insulation resistance of at least 1,000 MΩ at 500 VDC, with coils available in AC or DC up to 300 V and continuous‑duty operation.