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Phoenix Contact 3037821
AllConnectorsTerminal blocksSpring-cage connection
Phoenix ContactOfficial Distributor

By Phoenix Contact

SKU
MPN
ST 2,5-TWIN-MT BU
Weight
0.01 kg
This product is Not Cancellable/Not Returnable

ST 2,5-TWIN-MT BU - Knife-disconnect terminal block

Knife-disconnect terminal block, nom. voltage: 400 V, nominal current: 20 A, 1 level, connection method: Spring-cage connection, Rated cross section: 2.5 mm2, cross section: 0.08 mm2 - 4 mm2, mounting: NS 35/7,5, NS 35/15, color: blue

  • Three and four-conductor terminal blocks can be used for multi-conductor connections
  • User-friendly wiring thanks to front connection
  • Test pick-off parallel to the disconnect point for test plugs with 2.3 mm diameter
  • Consistent and can be double bridged for all tasks in time-saving potential supply and distribution
  • Tested for railway applications
Technical Specifications

General

NoteThe max. load current must not be exceeded by the total current of all connected conductors.

Product properties

Area of applicationRailway industry
Area of applicationMachine building
Area of applicationPlant engineering
Number of Connections3
Number of rows1
Potentials1

Insulation characteristics

Overvoltage categoryIII
Degree of pollution3

Electrical properties

Rated surge voltage6 kV
Maximum power dissipation for nominal condition0.77 W

Connection data

Number of connections per level3
Nominal cross section2.5 mm²

1 level

Stripping length8 mm ... 10 mm
Internal cylindrical gageA3
Connection in acc. with standardIEC 60947-7-1
Conductor cross section rigid0.08 mm² ... 4 mm²
Cross section AWG28 ... 12 (converted acc. to IEC)
Conductor cross section flexible0.08 mm² ... 2.5 mm²
Conductor cross section, flexible [AWG]28 ... 14 (converted acc. to IEC)
Conductor cross-section flexible (ferrule without plastic sleeve)0.14 mm² ... 2.5 mm²
Flexible conductor cross section (ferrule with plastic sleeve)0.14 mm² ... 2.5 mm²
2 conductors with the same cross section, flexible, with TWIN ferrule with plastic sleeve0.5 mm²
Nominal Current20 A (with 4 mm² conductor cross section)
Maximum Load Current20 A (with 4 mm² conductor cross section)
Nominal Voltage400 V
Nominal cross section2.5 mm²

Dimensions

Width5.2 mm
End cover width2.2 mm
Height72 mm
Depth on NS 35/7,536.5 mm
Depth on NS 35/1544 mm

Material specifications

Colorblue
Flammability rating according to UL 94V0
Insulating material groupI
Insulating materialPA
Static insulating material application in cold-60 °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
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

Mechanical data

Open side panelYes

Oscillation/broadband noise

SpecificationDIN EN 50155 (VDE 0115-200):2008-03
SpectrumService life test category 2, bogie-mounted
Frequencyf1 = 5 Hz to f2 = 250 Hz
ASD level6.12 (m/s²)²/Hz
Acceleration3.12g
Test duration per axis5 h
Test directionsX-, Y- and Z-axis
ResultTest passed

Shocks

SpecificationDIN EN 50155 (VDE 0115-200):2008-03
Pulse shapeHalf-sine
Acceleration30g
Shock duration18 ms
Number of shocks per direction3
Test directionsX-, Y- and Z-axis (pos. and neg.)
ResultTest passed

Ambient conditions

Ambient Temperature (Operation)-60 °C ... 110 °C (Operating temperature range incl. self-heating; for max. short-term operating temperature, see 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 (operation)20 % ... 90 %
Permissible humidity (storage/transport)30 % ... 70 %

Standards and Regulations

Connection in acc. with standardIEC 60947-7-1

Mounting

Mounting TypeNS 35/7,5
Mounting TypeNS 35/15
Accessories
  • Phoenix Contact3030514
    3030514
    3030514 - End cover, depth: 29.1 mm, width: 2.2 mm, height: 72.2 mm, color: gray
  • Phoenix Contact3030815
    3030815
    3030815 - Partition plate, depth: 45 mm, width: 2 mm, height: 90.9 mm, color: gray
  • Phoenix Contact1204517
    1204517
    1204517 - Actuation tool, for ST terminal blocks, also suitable for use as a bladed screwdriver, size: 0.6 x 3.5 x 100 mm, 2-component grip, with non-slip grip
  • Phoenix Contact3030941
    3030941
    3030941 - Warning cover, 5-pos., for terminal width: 5.2 mm
  • Phoenix Contact3030513
    3030513
    3030513 - End cover, depth: 29 mm, width: 0.8 mm, height: 72 mm, color: orange
  • Phoenix Contact3039900
    3039900
    3039900 - Operating decal for the ST terminal block
  • Phoenix Contact3247954
    3247954
    3247954 - Switching lock, depth: 23.1 mm, width: 3.5 mm, height: 10.5 mm, color: white
  • Phoenix Contact1207608
    1207608
    1207608 - Actuation tool, for all 2.5 mm2 - 4.0 mm2 spring-cages
  • Phoenix Contact3062757
    3062757
    3062757 - Cover for conductor shaft, 10-pos., for spring cage terminal blocks (ST) and terminal blocks with push-in technology (PT) with a width of 5.2 mm
  • Phoenix Contact3032447
    3032447
    3032447 - Component connector, with 47 kOhm resistance for wire-break monitoring, pitch: 5.2 mm, depth: 34.8 mm, width: 4.1 mm, height: 8.9 mm, number of positions: 2, color: black
  • Phoenix Contact3061282
    3061282
    3061282 - Cover for actuation shaft, 5-pos., for spring-cage terminal blocks with width of 5.2 mm
  • Phoenix Contact3030172
    3030172
    Wire bridge - FBSW 2-5/250MM
  • Phoenix Contact3030170
    3030170
    Wire bridge - FBSW 2-5/60MM
  • Phoenix Contact3030171
    3030171
    Wire bridge - FBSW 2-5/110MM
  • Phoenix Contact3030172
    3030172
    Wire bridge - FBSW 2-5/250MM
  • Phoenix Contact3030170
    3030170
    Wire bridge - FBSW 2-5/60MM
  • Phoenix Contact3030171
    3030171
    Wire bridge - FBSW 2-5/110MM
  • Phoenix Contact3030161
    3030161
    3030161 - Plug-in bridge, pitch: 5.2 mm, number of positions: 2, length: 23 mm, color: red
  • Phoenix Contact3030174
    3030174
    3030174 - Plug-in bridge, pitch: 5.2 mm, number of positions: 3, length: 23 mm, color: red
  • Phoenix Contact3030187
    3030187
    3030187 - Plug-in bridge, pitch: 5.2 mm, number of positions: 4, length: 23 mm, color: red
  • Phoenix Contact3030190
    3030190
    3030190 - Plug-in bridge, pitch: 5.2 mm, number of positions: 5, length: 23 mm, color: red
  • Phoenix Contact3030213
    3030213
    3030213 - Plug-in bridge, pitch: 5.2 mm, number of positions: 10, length: 23 mm, color: red
  • Phoenix Contact3030226
    3030226
    3030226 - Plug-in bridge, pitch: 5.2 mm, number of positions: 20, color: red
  • Phoenix Contact3038930
    3038930
    3038930 - Plug-in bridge, pitch: 5.2 mm, number of positions: 50, color: red
  • Phoenix Contact3033702
    3033702
    3033702 - Plug-in bridge, pitch: 5.2 mm, number of positions: 2, color: red
  • Phoenix Contact3001591
    3001591
    3001591 - Plug-in bridge, pitch: 5.2 mm, number of positions: 3, color: red
  • Phoenix Contact3001592
    3001592
    3001592 - Plug-in bridge, pitch: 5.2 mm, number of positions: 4, color: red
  • Phoenix Contact3001593
    3001593
    3001593 - Plug-in bridge, pitch: 5.2 mm, number of positions: 5, color: red
  • Phoenix Contact3033710
    3033710
    3033710 - Plug-in bridge, pitch: 5.2 mm, number of positions: 10, color: red
  • Phoenix Contact3036877
    3036877
    3036877 - Plug-in bridge, pitch: 5.2 mm, number of positions: 2, color: blue
  • Phoenix Contact3036880
    3036880
    3036880 - Plug-in bridge, pitch: 5.2 mm, number of positions: 3, color: blue
  • Phoenix Contact3036893
    3036893
    3036893 - Plug-in bridge, pitch: 5.2 mm, number of positions: 4, color: blue
  • Phoenix Contact3036903
    3036903
    3036903 - Plug-in bridge, pitch: 5.2 mm, number of positions: 5, color: blue
  • Phoenix Contact3036916
    3036916
    3036916 - Plug-in bridge, pitch: 5.2 mm, number of positions: 10, color: blue
  • Phoenix Contact3036929
    3036929
    3036929 - Plug-in bridge, pitch: 5.2 mm, number of positions: 20, color: blue
  • Phoenix Contact3032114
    3032114
    3032114 - Plug-in bridge, pitch: 5.2 mm, number of positions: 50, color: blue
  • Phoenix Contact0801733
    0801733
    0801733 - DIN rail perforated, Pack of 25 (50 m), acc. to EN 60715, material: Steel, galvanized, passivated with a thick layer, Standard profile, color: silver
  • Phoenix Contact0801681
    0801681
    0801681 - DIN rail, unperforated, Pack of 25 (50 m), acc. to EN 60715, material: Steel, galvanized, passivated with a thick layer, Standard profile, color: silver
  • Phoenix Contact1204119
    1204119
    1204119 - DIN rail perforated, Pack of 25 (50 m), acc. to EN 60715, material: Steel, Galvanized, white passivated, Standard profile, color: silver
  • Phoenix Contact1204122
    1204122
    1204122 - DIN rail, unperforated, Pack of 10 (20 m), acc. to EN 60715, material: Steel, Galvanized, white passivated, Standard profile, color: silver
  • Phoenix Contact0801704
    0801704
    0801704 - DIN rail, unperforated, Pack of 25 (50 m), acc. to EN 60715, material: Aluminum, uncoated, Standard profile, color: silver
  • Phoenix Contact1206421
    1206421
    1206421 - DIN rail perforated, Pack of 25 (50 m), acc. to EN 60715, material: Steel, galvanized, Standard profile, color: silver
  • Phoenix Contact1206434
    1206434
    1206434 - DIN rail, unperforated, Pack of 25 (50 m), acc. to EN 60715, material: Steel, galvanized, Standard profile, color: silver
  • Phoenix Contact0801762
    0801762
    0801762 - DIN rail, unperforated, Pack of 10 (20 m), acc. to EN 60715, material: Copper, uncoated, Standard profile, color: copper-colored
  • Phoenix Contact1206560
    1206560
    1206560 - DIN rail end piece, for DIN rail NS 35/7.5
  • Phoenix Contact1050004
    1050004
    1050004 -
  • Phoenix Contact1050017
    1050017
    1050017 -
  • Phoenix Contact1050020
    1050020
    1050020 -
  • Phoenix Contact1050033
    1050033
    1050033 -
  • Phoenix Contact1050415
    1050415
    1050415 -
  • Phoenix Contact0818108
    0818108
    0818108 -
  • Phoenix Contact0824581
    0824581
    Marker for terminal blocks - UC-TM 5 CUS
  • Phoenix Contact0828734
    0828734
    0828734 -
  • Phoenix Contact0808642
    0808642
    0808642 -
  • Phoenix Contact0810821
    0810821
    0810821 -
  • Phoenix Contact0810863
    0810863
    0810863 -
  • Phoenix Contact0818153
    0818153
    0818153 -
  • Phoenix Contact0824638
    0824638
    Marker for terminal blocks - UC-TMF 5 CUS
  • Phoenix Contact0828744
    0828744
    0828744 -
  • Phoenix Contact3002843
    3002843
    3002843 - Insulating sleeve, color: white
  • Phoenix Contact3002856
    3002856
    3002856 - Insulating sleeve, color: gray
  • Phoenix Contact3002869
    3002869
    3002869 - Insulating sleeve, color: black
  • Phoenix Contact3035975
    3035975
    3035975 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035974
    3035974
    3035974 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035977
    3035977
    3035977 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035976
    3035976
    3035976 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035978
    3035978
    3035978 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035980
    3035980
    3035980 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035982
    3035982
    3035982 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035979
    3035979
    3035979 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035981
    3035981
    3035981 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3035983
    3035983
    3035983 - 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
  • Phoenix Contact3030983
    3030983
    3030983 - Test plug, Modular test plug, number of positions: 1, color: red
  • Phoenix Contact3036725
    3036725
    3036725 - Spacer plate, depth: 29 mm, width: 5.2 mm, height: 22.4 mm, number of positions: 1, color: red
  • Phoenix Contact3038723
    3038723
    3038723 - Test plug, number of positions: 1, color: red
  • Phoenix Contact1201662
    1201662
    1201662 - End clamp, for end support of UKH 50 to UKH 240, is pushed onto DIN rail NS 35 and fixed with 2 screws, width: 10 mm, color: aluminum

Why Proax for Phoenix Contact 3037821?

Proax is an authorized distributor of Phoenix Contact 3037821 and one of Phoenix Contact's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.

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Additional Information

Pack Size50
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    3031267 - Ground terminal, number of connections: 3, connection method: Spring-cage connection, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: green-yellow
  • Phoenix Contact3040847
    3040847
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  • Phoenix Contact3035603
    3035603
    3035603 - Component terminal block, with disconnected current bar and resistor, nom. voltage: 2 V, nominal current: 0.05 A, number of connections: 3, connection method: Spring-cage connection, 1 level, Rated cross section: 2.5 mm2, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: orange
  • Phoenix Contact3036521
    3036521
    3036521 - Component terminal block, with integrated diode, nom. voltage: 800 V, nominal current: 0.5 A, number of connections: 3, connection method: Spring-cage connection, Rated cross section: 1 mm2, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: gray
  • Phoenix Contact3037850
    3037850
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    3036246
    3036246 - Component terminal block, with integrated diode, nom. voltage: 800 V, nominal current: 0.5 A, number of connections: 3, connection method: Spring-cage connection, Rated cross section: 1 mm2, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: gray
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    3037847
    3037847 - Component terminal block, with integrated diode, nom. voltage: 800 V, nominal current: 0.5 A, number of connections: 3, connection method: Spring-cage connection, Rated cross section: 1 mm2, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: red
  • Phoenix Contact3038354
    3038354
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    3061389 - Latching flange, mounting type: NS 35/7,5, NS 35/15, color: gray
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    3042120 - Spring cage ground terminal block, number of connections: 3, connection method: Spring-cage/plug-in connection, 1st level connection left, cross section: 0.08 mm2 - 4 mm2, 1st level connection right, mounting type: NS 35/7,5, NS 35/15, color: green-yellow
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Sold in quantities of 50

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