UKK Double-Level Screw Terminal Blocks

UKK3 Double-Level Screw Terminal
UKK5 Double-Level Screw Terminal

Series Part Number

Part Number: ULO - TB346 - UKK 5 BU
Explanation:

Brand

Product Code

TB345 - UKK3 model
TB346 - UKK5 model

Terminal and Color

UKK 3 BU - Blue UKK3; TB345; 2.5mm² nominal cross-section
UKK3 - Gray UKK3 in Description; TB345; BU omitted
UKK 5 BU - Blue UKK5; TB346; 4mm² nominal cross-section
UKK5 - Gray UKK5 in Description; TB346; BU omitted; each model has two levels, four connections and two separate potentials

Description

Double-level terminal selection

UKK3 and UKK5 each provide two separate potentials and four screw connections arranged on two levels. Both use M3 screws and mount on NS35/7.5 rail. Select the body width, conductor range and bridge size for the individual model.

ParameterUKK3UKK5
Gray modelULO-TB345-UKK3ULO-TB346-UKK5
Blue optionULO-TB345-UKK 3 BUULO-TB346-UKK 5 BU
Levels / connections / potentials2 / 4 / 2
Nominal conductor cross section2.5mm²4mm²
IEC nominal current24A32A
Maximum load current32A
IEC nominal voltage500V
Overvoltage category / pollution degreeIII / 3
Rated impulse voltage6kV

Conductor preparation

ParameterUKK3UKK5
Solid conductor0.2–4mm²; 24–12AWG
Flexible conductor0.2–2.5mm²; 24–14AWG0.2–4mm²; 24–12AWG
Flexible conductor with ferrule0.25–1.5mm²0.25–2.5mm²
Screw / tightening torqueM3 / 0.5N·m
Stripping length8mm

UL use-group ratings

ModelUse groupRated currentRated voltageConductor range
UKK3B20A300V28–12AWG
C
D5A600V
UKK5B30A300V26–10AWG
C
D5A600V

The UL conductor ranges apply to the corresponding UL ratings; the solid and flexible conductor ranges above describe the general connection data.

Construction and mounting dimensions

ParameterValue
Protection levelIP20
Operating temperature-40°C to +105°C
Insulation material / groupPA66 / I
Flammability classificationUL94V-0
Contact material / finishCopper alloy / tin plated
DIN railNS35/7.5
ModelBody widthLengthOverall heightRail-seat-to-top heightWidest local feature
UKK35.15mm56mm60.9mm54.6mm7.75mm
UKK56.15mm8.75mm
UKK3 double-level terminal dimensions
UKK3: 5.15mm body width with a 7.75mm widest local feature. The rail center is 27.45mm from the right end; the half-rail width is 17.5mm.
UKK5 double-level terminal dimensions
UKK5: 6.15mm body width with an 8.75mm widest local feature. The terminal is 56mm long and 60.9mm high.

Assembly accessories

AccessoryUKK3 referenceUKK5 reference
End coverULO-TB392-D-UKK3/5
Compensation end coverULO-TB392-DP-UKK3/5
Partition plateULO-TB395-TS-KK3
Fixed bridgeULO-TB390-FBI XX-5ULO-TB390-FBI XX-6
Pluggable bridgeULO-TB390-EB XX-5ULO-TB390-EB XX-6
Marker stripULO-TB391-ZB5; ULO-TB391-ZBF5ULO-TB391-ZB6; ULO-TB391-ZBF6
Marker cardULO-TB394-B1; ULO-TB394-B2; ULO-TB394-B3
End clampULO-TB393-E/UK; ULO-TB393-E/UK1; ULO-TB393-E-WA

Drawing tolerances

Dimension rangeTotal pitch toleranceNominal dimension tolerance
0–30mm±0.18mm±0.20mm
Over 30–53mm±0.20mm±0.25mm
Over 53–70mm±0.25mm±0.30mm
Over 70–90mm±0.30mm±0.35mm
Over 90–115mm±0.35mm±0.44mm
Over 115–150mm±0.44mm±0.55mm
Over 150–200mm±0.55mm±0.70mm
Over 200–250mm±0.70mm±0.80mm
Over 250–320mm±0.75mm±0.90mm

Geometric tolerances: perpendicularity 0.2mm through 10mm and 0.3mm above 10mm; symmetry 0.3mm; straightness 0.2mm through 100mm; parallelism 0.3mm over 100–150mm and 0.5mm above 150mm.

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