Single Row Terminal Blocks

General Information

Single Row Terminal Blocks are available in four basic line to line molding sizes. Some are available in either open or feed thru/printed circuit designs. The basic material is phenolic. Modifications are also available on most terminal blocks, including marking strips.

411 GP 06 PSB / 411 GP 06 PSB KT11 KT12

411 GP 06 PSB / 411 GP 06 PSB KT11 KT12

812 GP 03 KT75

812 GP 03 KT75

691 GP 06 PSB

1691 GP 06 PSB

Single Row Terminal Blocks - Reference Chart
Amps Voltage Rating Series (click links below for dimensions/catalog #s) Base Material Bare-Wire Range Screw Size Inches L to L # of Lines Features Click link to view Datasheet
Class B Class C
5 300 n/a 411 Phenolic #18 - 20 3-56 .250 1-23 Open Back Datasheet
15 300 150 599 / 799 Phenolic #16-22 5-40 .375 1-30 Open Back Datasheet
20 300 150 699 / 899 Phenolic #14-20 6-32 .437 1-23 Open Back Datasheet
30 600 600 812 / 912 Phenolic #10-14 8-32 .562 1-18 Open Back Datasheet
20 300 300 1690 Phenolic #14-20 6-32 .437 1-25 Feed Thru N/A
15 300 150 2590 Phenolic #16-22 6-32 .375 1-25 Printed Circuit N/A
20 300 300 2690 Phenolic #14-20 6-32/8-32 .437 1-25 Printed Circuit N/A
Ratings and Standards

The voltage ratings of terminal blocks are based upon the minimum spacing between electrically conductive parts line-to-line through air and over surface and line-to-ground through air and over surface.

Class A - Service, including deadfront switchboards, panel boards and service entrance devices.

Class B - Commercial appliances including business equipment and electronic data processing equipment.

Class C - Industrial, general

Spacing Requirements (in inches)
  Voltage Through Air Over Surface
Class A 51-150 0.500 0.750
151-300 0.750 1.250
301-600 1.000 2.000
Class B 51-150 0.063 0.063
151-300 0.094 0.094
301-600 0.375 0.500
Class C 51-150 0.125 0.250
151-300 0.250 0.375
301-600 0.375 0.500