Tap-Off Terminal Blocks

A tap-off terminal block is a complementary terminal block used with a large-cross-section DIN rail terminal block to take a smaller-cross-section branch conductor from the main line. It is used in power distribution panels to take a measuring, control or auxiliary circuit supply from feed terminal blocks, without cutting the main conductor or adding a separate distribution block. In this category, the two types made for Onka MRK series 35-50 mm² and 70-95-120 mm² terminal block groups are listed with 76 A rated current and 750 V rated voltage, in beige, gray, brown, red, blue, yellow, black and green. Choose the tap-off terminal block first by the cross-section group of the main terminal block it will be fitted to (35-50 mm² or 70-95-120 mm²); compare the branch line's current with the 76 A rated current and the branch conductor's cross-section with the connection cross-section in the manufacturer data, and match the housing color to the main terminal block. A tap-off terminal block is not a feed-through terminal block used on its own; it works together with a compatible main terminal block, and protection of the branch line is determined separately in the project.

Products

How to choose Tap-Off Terminal Blocks

A tap-off terminal block is a complementary terminal block used with a large-cross-section DIN rail terminal block to take a smaller-cross-section branch conductor from the main line. It is used in power distribution panels to take a measuring, control or auxiliary circuit supply from feed terminal blocks, without cutting the main conductor or adding a separate distribution block.

  • Clarify whether the task is connection, cable routing, enclosure distribution or termination.
  • Match dimensions, thread standard, conductor cross-section and IP rating with the cable and panel.
  • Choose housing material and pack quantity according to the mounting environment.

Frequently asked questions

What is Tap-Off Terminal Blocks and where is it used?

A tap-off terminal block is a complementary terminal block used with a large-cross-section DIN rail terminal block to take a smaller-cross-section branch conductor from the main line. It is used in power distribution panels to take a measuring, control or auxiliary circuit supply from feed terminal blocks, without cutting the main conductor or adding a separate distribution block.

What should I compare when choosing Tap-Off Terminal Blocks?

Choose the tap-off terminal block first by the cross-section group of the main terminal block it will be fitted to (35-50 mm² or 70-95-120 mm²); compare the branch line's current with the 76 A rated current and the branch conductor's cross-section with the connection cross-section in the manufacturer data, and match the housing color to the main terminal block.

Where can I find technical details for Tap-Off Terminal Blocks products?

A tap-off terminal block is not a feed-through terminal block used on its own; it works together with a compatible main terminal block, and protection of the branch line is determined separately in the project.

Tap-Off Terminal Blocks Selection Guide: Technical Criteria & Application Standards