FA8-68 PTB is mounted on the JPX188 MDF and it is used for termination
between external lines and jumper wires, with FA9-68 Protectors
protecting the JPX188 MDF against over-voltage and over-current.
FA8-68 PTB is designed in such structure: the external lines and the
jumper wires are disconnected before the protectors are inserted into
the protection connection blocks, only after inserting the protectors
will they be connected. Thus when the external lines suffer danger,
only pull out the protectors, the exchange lines will be disconnected
with the external lines. Each FA8-68 PTB has termination capacity of
25 lines.

Specifications:
1) Insulation Resistance ≥1000 MΩ
2) Dielectric Strength ≥1000V(AC 50Hz for 1 minute), no spark-over and
no flying arc
3) Contact resistance between conductor and reed: ≤3mΩ
4) Contact resistance between reeds: ≤7mΩ
5) Conductor diameter range: 0.4mm-0.8mm
6) Pulling strength: ≥25N