1.1 Scope
This part of IEC 60947 specifies requirements for PCB terminal blocks primarily intended for industrial or
similar use.
Mounting and fixing on the printed circuit board is made by soldering, press-in or equivalent methods to
provide electrical and mechanical connection between copper conductors and the printed circuit board.
This standard applies to PCB terminal blocks intended to connect copper conductors, with or without
special preparation, having a cross-section between 0,05 mm2 and 300 mm2 (AWG 30/600 kcmil),
intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V
d.c.
NOTE 1 Large cross section terminal blocks are dedicated to specific design of high current PCBs. The range up to 300 mm2 is kept
to cover any possible application. Examples of high current PCBs and PCB terminal blocks are shown in Annex C.
NOTE 2 AWG is the abbreviation of “American Wire Gage” (Gage (US) = Gauge (UK));
kcmil = 1 000 cmil;
1 cmil = 1 circular mil = surface of a circle having a diameter of 1 mil;
1 mil = 1/1 000 inch.
This standard may be used as a guide for special types of PCB terminal blocks with components, such as
disconnect units, integrated cartridge fuse-links and the like.
If applicable, in this standard the term “clamping unit” is used instead of “terminal”. This is taken into
account in case of references to IEC 60947-1.
1.1DV D2 Modification by adding the following:
1.1DV.1 This standard also applies to terminal blocks that have insulation piercing or
displacement clamping units.
1.1DV.2 The wire range for terminal blocks covered by this standard include 0,051 mm2 to
300 mm2 (30 AWG to 600 kcmil) copper conductors and 3,31 mm2 to 300 mm2 (12 AWG to
600 kcmil) aluminum conductors. See Annex DVA for aluminum requirements.
In Mexico, 3,31 mm2 (12 AWG), 5,26 mm2 (10 AWG), and 8,37 mm2 (8 AWG) aluminum
conductors are not allowed.
1.1DV.3 The voltage range includes up to 1500 Vac and 1500 Vdc.