120-1-A-3/1

120-1-A-3/1 is a 120 series ultra high density 4mm² (4mm x 4mm (0.157in x 0.157in) footprint) single-pole reed relay designed for ATE switching matrices and multiplexers where maximum channel count matters. It supports high density / ultra high density layouts thanks to an internal mu-metal magnetic screen that permits side-by-side stacking on a 4mm pitch, while maintaining low leakage performance with insulation resistance greater than 10¹² ohm. Two switch options are available: a general-purpose sputtered ruthenium switch rated up to 1A / 20W (15W at 3V), and a low-level version rated 0.5A / 10W optimised for cold-switching techniques. Standard operating temperature is –20 to +85°C, with high temperature use up to +125°C possible when coil drive is increased to compensate for copper’s resistance/temperature coefficient.

• Highest quality instrumentation grade reed switch
• Plastic package with internal mu-metal magnetic screen
• 100% tested for dynamic contact resistance for guaranteed performance
• 1 Form A (SPST) normally open energize to make relay
• Operating temperature range from -20°C to +85°C
• Coil voltage is 3V, coil resistance is 200 ohm
• Maximum contact resistance is 0.18ohm
• Maximum operating voltage is 2.25V, minimum operating voltage is 0.3V
• Power rating is 15W, maximum switch current is 1.0A
• Maximum switching voltage is 200V, life expectancy is 10⁹