Grade 2 Large Surface Door Contact with 1 Reed and 6 Terminals - White [SC550/WH] The SC550/WH Grade 2 Large Surface Door Contact are suitable for use in Ungraded, Grade 1 and Grade 2 systems. These contacts are required to have a mechanical tamper and/or be potted/sealed. End of Line (EOL) resistors are an option but are not a requirement to meet Grade 2. A range of contacts in plastic and aluminium which can be surface mounted and which will suit most domestic and commercial installations. Features: Large surface contact 6 Terminals Operating Gap - 30mm Leaf spring tamper EN50131-2-6 Grade 2 Environmental Class: II Specification: Connections: 6 Reed Switches: 1 Pull-in Gap: 30mm Material: Polystyrene Size mm: 85 x 25 x 20 Contact Form: SPST form A Voltage Range: 1-50v DC Switching Current: 500mA Contact Material: Rhodium Colours: White