ABB OTDC400UFV11-SH Disconnect Transfer Switch

ABB OTDC400UFV11-SH is a two-pole DC disconnect switch marketed as a PV disconnect transfer switch, rated for 400 A at up to 1,500 V DC for high‑current solar and energy‑storage installations. As part of ABB's OTDC family, it carries UL 98B and IEC 60947 approvals, offers a 10 kA short-time withstand rating, and is designed for direct mounting with lug terminals in DC power architectures. The unit uses an IP20 enclosure with base mounting and has overall dimensions of approximately 211 mm high, 157.5 mm wide, and 135 mm deep. Typical applications include isolating PV strings and ESS connections, providing a safe, code‑compliant means to disconnect and transfer between sources in DC power networks. The OTDC400UFV11-SH employs a two-pole configuration with the switching mechanism positioned between the poles, and ABB notes this family supports DC switching for systems up to 1,500 VDC, aligning with common PV and ESS installation practices.