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Phoenix Contact 3210156 Knife Disconnect Terminal Block

The PHOENIX CONTACT PT 2,5-MT knife disconnect terminal block is designed for reliable and efficient electrical connections. It utilizes a push-in connection mechanism, simplifying wiring and eliminating the need for tools. The compact design and front connection allow for space-saving installation in various industrial applications. The terminal block is suitable for connecting conductors with a cross-section of 0.14 mm² to 4 mm² (AWG 26-12) and is rated for a nominal current of 20A and a nominal voltage of 400V. It incorporates a knife disconnect mechanism for easy disconnection and testing, enhancing safety and maintenance efficiency. The terminal block is compatible with NS 35/7.5 and NS 35/15 mounting rails.

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Source:Newark
Part No:3210156
Stock:147
Inv Date:05-28-2026
Price: Unit price: $7.69
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Source:DigiKey
Part No:3210156
Stock:41
Inv Date:05-28-2026
Price: Unit price: $4.46
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Part No:3210156
Stock:1186
Inv Date:05-29-2026
Price: Unit price: $5.84
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Part No:3210156
Stock:392
Inv Date:05-28-2026
Price: Unit price: $5.67
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Part No:3210156
Stock:143
Inv Date:05-28-2026
Price: Unit price: $4.69
Buy/RFQ:
Part No:3210156
Stock:143
Inv Date:05-28-2026
Price: Unit price: $4.69
Buy/RFQ:
Part No:3210156
Stock:38
Inv Date:05-28-2026
Price: Unit price: $6.156
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Phoenix Contact 3210156 Knife Disconnect Terminal Block Specifications:

  • Number of levels: 1
  • Number of connections: 2
  • Nominal cross section: 2.5 mm²
  • Color: gray
  • Insulating material: PA
  • Flammability rating according to UL 94: V0
  • Rated surge voltage: 6 kV
  • Degree of pollution: 3
  • Overvoltage category: III
  • Insulating material group: I
  • Connection in acc. with standard: IEC 60947-7-1
  • Maximum load current: 20 A (with 4 mm² conductor cross section)
  • Nominal current IN: 20 A
  • Nominal voltage UN: 400 V
  • Open side panel: Yes
  • Shock protection test specification: DIN EN 50274 (VDE 0660-514):2002-11
  • Back of the hand protection: guaranteed
  • Finger protection: guaranteed
  • Result of surge voltage test: Test passed
  • Surge voltage test setpoint: 7.3 kV
  • Result of power-frequency withstand voltage test: Test passed
  • Power frequency withstand voltage setpoint: 1.89 kV
  • Result of the test for mechanical stability of terminal points: Test passed
  • Result of bending test: Test passed
  • Bending test rotation speed: 10 rpm
  • Bending test turns: 135
  • Bending test conductor cross section/weight: 0.14 mm² / 0.2 kg, 2.5 mm² / 0.7 kg, 4 mm² / 0.9 kg
  • Tensile test result: Test passed
  • Conductor cross section tensile test: 0.14 mm², 2.5 mm², 4 mm²
  • Tractive force setpoint: 10 N, 50 N, 60 N
  • Result of tight fit on support: Test passed
  • Tight fit on carrier: NS 35
  • Setpoint: 1 N
  • Result of voltage-drop test: Test passed
  • Requirements, voltage drop: ≤ 6,4 mV
  • Result of temperature-rise test: Test passed
  • Short circuit stability result: Test passed
  • Conductor cross section short circuit testing: 2.5 mm², 4 mm²
  • Short-time current: 0.3 kA, 0.48 kA
  • Result of aging test: Test passed
  • Ageing test for screwless modular terminal block temperature cycles: 192
  • Result of thermal test: Test passed
  • Proof of thermal characteristics (needle flame) effective duration: 30 s
  • Oscillation, broadband noise test result: Test passed
  • Test specification, oscillation, broadband noise: DIN EN 50155 (VDE 0115-200):2008-03
  • Test spectrum: Service life test category 1, class B, body mounted
  • Test frequency: f1= 5 Hz to f2= 150 Hz
  • ASD level: 1.857 (m/s²)/2/Hz
  • Acceleration: 5 g
  • Test duration per axis: 5 h
  • Test directions: X-, Y- and Z-axis (pos. and neg.)
  • Test specification, shock test: DIN EN 50155 (VDE 0115-200):2008-03
  • Shock form: Half-sine
  • Shock duration: 30 ms
  • Number of shocks per direction: 3
  • Relative insulation material temperature index (Elec., UL 746 B): 130 °C
  • Temperature index of insulation material (DIN EN 60216-1 (VDE 0304-21)): 125 °C
  • Static insulating material application in cold: -60 °C
  • Width: 5.2 mm
  • End cover width: 2.2 mm
  • Length: 62 mm
  • Height: 35.30 mm
  • Height NS 35/7,5: 36.5 mm
  • Height NS 35/15: 44 mm
  • Connection method: Push-in connection
  • Conductor cross section solid min.: 0.14 mm²
  • Conductor cross section solid max.: 4 mm²
  • Conductor cross section AWG min.: 26
  • Conductor cross section AWG max.: 12
  • Conductor cross section flexible min.: 0.14 mm²
  • Conductor cross section flexible max.: 2.5 mm²
  • Min. AWG conductor cross section, flexible: 26
  • Max. AWG conductor cross section, flexible: 14
  • Conductor cross section flexible, with ferrule without plastic sleeve min.: 0.14 mm²
  • Conductor cross section flexible, with ferrule without plastic sleeve max.: 2.5 mm²
  • Conductor cross section flexible, with ferrule with plastic sleeve min.: 0.14 mm²
  • Conductor cross section flexible, with ferrule with plastic sleeve max.: 2.5 mm²
  • 2 conductors with same cross section, stranded, TWIN ferrules with plastic sleeve, max.: 0.5 mm²
  • Stripping length: 8 mm ... 10 mm
  • Internal cylindrical gage: A3

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You can download the 3210156 datasheet or visit the Phoenix Contact website for support.

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Phoenix Contact

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