FT203 PTB is mounted on the line (vertical) side of HPX67 MDF and it is
used for termination between external lines and jumper wires. FA906
Protectors can be inserted into this block, protecting the HPX67 MDF
against over-voltage and over-current.

FT203 PTB is designed in such structure: the external lines and the
jumper wires are disconnected before the protectors are inserted into
the PTB, Only after inserting the protectors will they be connected.
Thus when the external lines suffers danger, only pull out the protector,
the exchange lines will be disconnected with the external lines. Each
FT203 PTB has termination capacity of 100 lines, consisting of 10pieces
of 10-line modules.

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