Image is Representational - See Manufacturer Specs | Solid State Relay - 90-140 VAC Control Voltage Range - 12 A Maximum Load Current - 24-280 VAC Operating Voltage Range - Zero Voltage Turn-On - LED Input Status Indicator - DIN Rail Mounting. The DR24B12 solid state relay fits standard 35mm DIN rail. Dimensions of this relay are: 3.45 (87.6mm) x 3.3 (83.7mm) x 0.72 (18.3mm).