ST Spring Cage Protective Earth DIN Rail Terminal Blocks

ST1.5 PE Spring Cage Ground Terminal
ST2.5 PE Spring Cage Ground Terminal

Series Part Number

Part Number: ULO - TB253 - ST2.5 - PE
Explanation:

Brand

Product Code

TB251 - ST1.5-PE model
TB253 - ST2.5-PE model

Terminal Model

ST1.5 - 1.5mm² nominal cross-section; TB251 only
ST2.5 - 2.5mm² nominal cross-section; TB253 only

Function

PE - Required protective-earth version; two spring-cage connections on one level, bonded to one earth potential; green-yellow housing

Description

Single-level protective-earth terminals

ST1.5-PE and ST2.5-PE provide two spring-cage connections on one level. Both connections bond to the metal grounding foot, forming one protective-earth potential on NS35/7.5 DIN rail. Green-yellow housings identify the grounding function.

PropertyST1.5-PEST2.5-PE
ModelULO-TB251-ST1.5-PEULO-TB253-ST2.5-PE
Nominal cross section1.5mm²2.5mm²
Connections / levels / PE potentials2 / 1 / 1
Rated impulse voltage; category III, pollution degree 36kV8kV
Nominal voltage / current / maximum load currentNot assigned for the PE function

Conductor ranges and preparation

Connection propertyST1.5-PEST2.5-PE
Solid conductor0.08–1.5mm²; 28–16AWG0.08–4mm²; 28–12AWG
Flexible conductor0.08–1.5mm²; 28–16AWG0.08–2.5mm²; 28–14AWG
Flexible conductor with ferrule0.14–1.5mm²0.14–2.5mm²
UL conductor-range specification26–14AWG28–12AWG
Stripping length10mm8–10mm
Connection methodSpring cage
Clamping screw / torqueNot applicable

Materials and operating conditions

PropertyBoth models
Insulation / material groupPA66 / I
FlammabilityUL94V-0
ContactsTin-plated copper alloy
ProtectionIP20
Operating temperature-60°C to +110°C
Housing colorGreen-yellow

Outline and mounting dimensions

DimensionST1.5-PEST2.5-PE
Width × length × overall height4.15×48.6×35.25mm5.15×48.6×35.25mm
Top to rail-seat datum29.25mm
Rail centerline to right end24.6mm
Half rail width17.5mm
ST1.5 PE ground terminal outline dimensions
ST1.5-PE external outline: 4.15mm width, 48.6mm length and 35.25mm overall height.
ST2.5 PE ground terminal outline dimensions
ST2.5-PE has a 5.15mm width with the same 48.6mm length and 35.25mm overall height. The top-to-rail-seat dimension is 29.25mm.
Dimension rangeTotal pitch toleranceNominal dimension tolerance
0–30mm±0.18mm±0.20mm
>30–53mm±0.20mm±0.25mm
>53–70mm±0.25mm±0.30mm
>70–90mm±0.30mm±0.35mm
>90–115mm±0.35mm±0.44mm
>115–150mm±0.44mm±0.55mm
>150–200mm±0.55mm±0.70mm
>200–250mm±0.70mm±0.80mm
>250–320mm±0.75mm±0.90mm
Geometric toleranceApplicable dimensionValue
PerpendicularityUp to 10mm0.2mm
Over 10mm0.3mm
SymmetryGeneral0.3mm
StraightnessUp to 100mm0.2mm
Parallelism100–150mm0.3mm
Over 150mm0.5mm

Terminal-strip accessory references

AccessoryST1.5-PE referenceST2.5-PE reference
End coverULO-TB392-D-ST1.5ULO-TB392-D-ST2.5
Marker stripsULO-TB391-ZB4; ULO-TB391-ZBF4ULO-TB391-ZB5; ULO-TB391-ZBF5
Marker cardsULO-TB394-B1; ULO-TB394-B2; ULO-TB394-B3
End clampsULO-TB393-E/UK; ULO-TB393-E/UK1; ULO-TB393-E-WA
Partition plate / pluggable bridgeNot specified
DIN railNS35/7.5

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