Phoenix UT 16Sq Terminal Block

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Feed-through terminal block, nom. voltage: 1000 V, nominal current: 76 A, connection method: Screw connection, Rated cross section: 16 mm2, cross section: 1.5 mm2 - 25 mm2, mounting type: NS 35/7,5, NS 35/15, color: gray
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Product properties
Product typeFeed-through terminal block
Area of applicationRailway industry
Machine building
Plant engineering
Process industry
Number of connections2
Number of rows1
Insulation characteristics
Overvoltage categoryIII
Degree of pollution3
Electrical properties
Rated surge voltage8 kV
Maximum power dissipation for nominal condition2.43 W
Connection data
Number of connections per level2
Nominal cross section16 mm²
Level 1 above 1 below 1
Screw threadM5
Tightening torque2.5 ... 3 Nm
Stripping length14 mm
Internal cylindrical gageA7
Connection in acc. with standardIEC 60947-7-1
Conductor cross section solid1.5 mm² ... 25 mm²
Cross section AWG16 ... 4
Conductor cross section flexible1.5 mm² ... 25 mm²
Conductor cross section, flexible [AWG]16 ... 4
Flexible conductor cross section flexible (ferrule, w/o plastic sleeve)1 mm² ... 16 mm²
Flexible conductor cross section (ferrule with plastic sleeve)1 mm² ... 16 mm²
2 conductors with same cross section, solid1 mm² ... 6 mm²
2 conductors with same cross section, flexible1 mm² ... 6 mm²
2 conductors with same cross section, flexible, with ferrule without plastic sleeve1 mm² ... 6 mm²
2 conductors with the same cross section, flexible, with TWIN ferrule with plastic sleeve0.75 mm² ... 10 mm²
Nominal current76 A
Maximum load current101 A (with 25 mm² conductor cross section)
Nominal voltage1000 V
NoteNote: Product releases, connection cross sections and notes on connecting aluminum cables can be found in the download area.
Nominal cross section16 mm²
Ex data
Rated data (ATEX/IECEx)
ATEX certificateKEMA 04 ATEX 2048 U
IEC Ex certificateIECEx  KEM 06.0027 U
IdentificationEx eb IIC Gb
Operating temperature range-60 °C ... 110 °C
Ex-certified accessories3047206 D-UT 16
1205066 SZS 1,0X4,0 VDE
3022276 CLIPFIX 35-5
3022218 CLIPFIX 35
Plug-in bridge / FBS 2-12 / 3005950
Bridge data73.5 A / 16 mm²
Ex temperature increase40 K (80.5 A / 16 mm²)
Rated voltage630 V
for bridging with bridge690 V
Rated insulation voltage630 V
Ex level General
Rated current73.5 A
Maximum load current89.5 A
Contact resistance0.16 mΩ
Ex connection data General
Torque range2.5 Nm ... 3 Nm
Nominal cross section16 mm²
Rated cross section AWG6
Connection capacity rigid1.5 mm² ... 25 mm²
Connection capacity AWG16 ... 4
Connection capacity flexible1.5 mm² ... 16 mm²
Connection capacity AWG16 ... 6
2 conductors with same cross section, solid1 mm² ... 6 mm²
2 conductors with the same cross-section AWG rigid18 ... 10
2 conductors with same cross section, stranded1 mm² ... 4 mm²
2 conductors with the same cross-section AWG flexible18 ... 12
Width12.2 mm
End cover width2.2 mm
Height54.4 mm
Height NS 35/1562.5 mm
Height NS 35/7,555 mm
Length55.5 mm
Material specifications
Flammability rating according to UL 94V0
Insulating material groupI
Insulating materialPA
Static insulating material application in cold-60 °C
Temperature index of insulation material (DIN EN 60216-1 (VDE 0304-21))130 °C
Relative insulation material temperature index (Elec., UL 746 B)130 °C
Fire protection for rail vehicles (DIN EN 45545-2) R22HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R23HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R24HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R26HL 1 - HL 3
Calorimetric heat release NFPA 130 (ASTM E 1354)28 MJ/kg
Surface flammability NFPA 130 (ASTM E 162)passed
Specific optical density of smoke NFPA 130 (ASTM E 662)passed
Smoke gas toxicity NFPA 130 (SMP 800C)passed
Electrical tests
Surge voltage test
Test voltage setpoint9.8 kV
ResultTest passed
Temperature-rise test
Requirement temperature-rise testIncrease in temperature ≤ 45 K
ResultTest passed
Short-time withstand current 16 mm²1.92 kA
ResultTest passed
Power-frequency withstand voltage
Test voltage setpoint2.2 kV
ResultTest passed
Mechanical properties
Mechanical data
Open side panelYes
Mechanical tests
Mechanical strength
ResultTest passed
Attachment on the carrier
DIN rail/fixing supportNS 32/NS 35
Test force setpoint5 N
ResultTest passed
Test for conductor damage and slackening
Rotation speed10 rpm
Conductor cross section/weight1.5 mm² / 0.4 kg
16 mm² / 2.9 kg
25 mm² / 4.5 kg
ResultTest passed
Environmental and real-life conditions
Needle-flame test
Time of exposure30 s
ResultTest passed
Oscillation/broadband noise
SpecificationDIN EN 50155 (VDE 0115-200):2018-05
SpectrumService life test category 2, bogie-mounted
Frequencyf1 = 5 Hz to f2 = 250 Hz
ASD level6.12 (m/s²)²/Hz
Test duration per axis5 h
Test directionsX-, Y- and Z-axis
SpecificationDIN EN 50155 (VDE 0115-200):2008-03
Pulse shapeHalf-sine
Shock duration18 ms
Number of shocks per direction3
Test directionsX-, Y- and Z-axis (pos. and neg.)
Ambient conditions
Ambient temperature (operation)-60 °C ... 105 °C (max. short-term operating temperature RTI Elec.)
Ambient temperature (storage/transport)-25 °C ... 60 °C (for a short time, not exceeding 24 h, -60 °C to +70 °C)
Ambient temperature (assembly)-5 °C ... 70 °C
Ambient temperature (actuation)-5 °C ... 70 °C
Permissible humidity (storage/transport)30 % ... 70 %
Standards and regulations
Connection in acc. with standardIEC 60947-7-1
Mounting typeNS 35/7,5
NS 35/15


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