Tensile strength: Test Ua1:
Value of applied force for Ua1 test:
Diameter (d) of
corresponding round leads
Force with tolerance of ±10%
∅ ≤ 0.25 mm 1.0 N
0.25 < ∅ ≤ 0.35 mm 2.5 N
0.35 < ∅ ≤ 0.50 mm 5.0 N
0.50 < ∅ ≤ 0.80 mm 10.0 N
Bending strength: Test Ub:
Two 90°-bends in opposite directions
Value of applied force for Ub test:
Diameter (d) of
corresponding round leads
Force with tolerance of ±10%
∅ ≤ 0.25 mm 0.5 N
0.25 < ∅ ≤ 0.35 mm 1.25 N
0.35 < ∅ ≤ 0.50 mm 2.5 N
0.50 < ∅ ≤ 0.80 mm 5 N
Torsional strength: Test Uc: severity 2
The lead is bent by 90° at a distance of 6 to 6.5 mm from the thermistor body.
The bending radius of the leads should be approx. 0.75 mm. Two torsions of
180° each (severity 2).
When subjecting leads to mechanical stress, the following should be observed:
Tensile stress on leads
During mounting and operation tensile forces on the leads are to be avoided.
Bending of leads
Bending of the leads directly on the thermistor body is not permissible.
A lead may be bent at a minimum distance of twice the wire's diameter +4 mm from the solder
joint on the thermistor body. During bending the wire must be mechanically relieved at its outlet.
The bending radius should be at least 0.75 mm.
Temperature measurement B57863S
Miniature sensors with bendable wires S863
Page 12 of 21Please read Cautions and warnings and
Important notes at the end of this document.
