Screw terminal

Screw terminals meet VDE 0609 / EN 60 999. Dimensions and

twisting moments for testing are shown opposite.

The relevant regulations state that in the case of

Terminals with wire protection.

No special preparation of the conductor is required
- except for the stripping of the insulation..

Series Han E®, Han® HsB, Han Hv E®, Han® K 6/12
Terminals without wire protection

The insulation is first stripped and then a wire ferrule must be used.


with wire protection	without wire protection

Wire gauge (mm²)	1	1,5	2,5	4	6	10
Screw thread	M 2,6	M 3	M 3	M 3,5	M 4	M 4
Test moment of torque (Ncm)	40	50	50	80	120	120

Tensile strength of conductors

The diagram above shows the curve for tensile strength of screw terminations when wire protection is utilised.

Screw thread:	M 3
Twisting moment for testing:	50 Ncm

Termination details for inserts

Inserts	max. wire gauge		Stripping length
Inserts	(mm²)	AWG	l(mm)
Han® 3 A, Han® 4 A	2,5	14	4,5
Han E®, Han-Com®, Han Hv E®	2,5	14	7,0
Han® HsB	6,0	10	11,5
Staf®	1,5	16	4,0
Han® K 4/x (80A)	16	6	14

Recommended tightening torque and size of screw driver

Size of screw	Connector type	Ø Tightening torque (Nm)*	Ø Tightening torque (lbft)	Recommended size of screw driver
M3	Screw terminal Han® 3 A / 4 A / Q 5/0	0.25	0.20	0.4 x 2.5
M3	Screw terminal Han® 10 A - 32 A	0.50	0.40	0.5 x 3.5 or + size 1
M3	Screw terminal Han E®, Hv E® fixing screws of all kinds, guiding pins and bushes	0.50	0.40	0.5 x 3.5
M4	Ground terminal Han A®, Han® E, Han D®, DD®, Ground terminal K (8/24)	1.20	0.90	0.5 x 3.5 or ± size 1+2
M4	Screw terminal Han® HsB	1.20	0.90	0.8 x 4.5
M5	Ground terminal Han® HsB HsC (K 12/2), K 4/., K 6/12	2.00	1.40	0.8 x 4.5 1.2 x 8
M6	Screw terminal Han® K 4/. (80 A)	1.20	0.90	0.8 x 4.5
-	Axial screw terminal Han® K 6/12 (40 A)	1.20	0.90	Hexagon recess 2 mm
M8	Axial screw terminal Han® K 6/6 (100 A)	6.0 - 6.5	4.30	Hexagon recess 4 mm

* in accordance with DIN EN 60999

Increasing the tightening torque does not improve considerably the contact resistances. The torque moments were determined when optimum mechanical, thermal and electrical circumstances were given. If the recommended figures are considerably exceeded the wire or the termination can be damaged.