Collection: Stud Terminals For DIN Rail

The Onka MRK-P range of stud terminal blocks is built for the jobs standard DIN rail terminals can't handle: high-current power distribution where a screw or push-fit connection simply isn't rated for the load. Each size clips onto standard 35mm DIN rail and terminates a large cross-sectional-area (CSA) cable through a threaded stud connection — M6 through to M12 depending on size — giving a mechanically secure joint that a conventional terminal can't match.

The MRK-P range runs from 25mm² (101A) up to 240mm² (415A), all rated to 1000V. The size quoted for each terminal is the maximum cable CSA it accepts, so there's a size to suit most industrial DC and AC power runs.

Integrated snap-shut lid as standard. Every MRK-P terminal has a hinged lid on each side that snaps shut over the stud connection, keeping it fully insulated and touch-safe even mid-installation. Many alternative stud terminals are supplied without a cover, or need one bought separately as an extra accessory — with MRK-P it's included in the price. The bolted connection is also far less prone to loosening under vibration than a screw terminal — a real factor in rail, mobile and marine applications as well as static panels subject to thermal cycling.

Typical uses include:

• Photovoltaic (PV) installations — high-current DC strings and combiner boxes
• Battery and inverter connections — where standard terminals aren't rated for the current
• Rail, marine and mobile plant — vibration-resistant terminations for high-vibration environments
• Industrial distribution panels — main incomer and busbar tap-off points carrying large CSA cable

All MRK-P terminals are sold individually and are fully encapsulated in PA6.6 housings with copper bridge contacts, rated for continuous use from -40°C to +140°C.