Tension spring terminal block. Screwdriver-operated tension spring terminal blocks with side entry, featuring mounting flanges at both ends. A mounting adapter for DIN rails for screw mounting in the base of the terminal block is also available. A maximum distance of 35-40 mm between the adapters is recommended. Order number 101-3877 (WAGO 209-123) is a mounting foot with a screw for DIN-35 rail. It can be screwed onto terminal blocks with mounting flanges. Suitable for tension spring terminals – modular terminal blocks series 260, 261, and 262. Features and benefits: 2 conductor through terminal block, 6 kV overvoltage. 101-3877 is a mounting foot with a screw for DIN 35 rail.