Abb Switch OT25G1-4BSN2 25A 4 Poles IEC frame G1

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ABB OT25G1-4BSN2 6417019931111

The ABB OT25G1-4BSN2 25A 4-pole disconnector (frame G1) is a compact switch-disconnector for DIN rail or base, ideal for safe disconnection of lines and loads. Fourth pole switched late-break/early-make, lockable knob handle (external not included), Ui 800 V and Uimp 8 kV.

  • Thermal current Ith/Ithe: 25 A

  • Poles: 4P

  • Fourth pole: right side, switched (late-break / early-make)

  • Front protection degree: IP20

  • Mounting: on base / DIN rail

  • Operating mode: front

  • Pollution degree: 3

  • Power loss: 0.4 W per pole

  • Ui: 800 V (IEC 60947-1)

  • Uimp: 8 kV

  • Ie AC-21A/AC-22A/AC-23A: 25 A @ 415 V / 690 V

  • Pe AC-23A: 11 kW @ 415 V; 22 kW @ 690 V

  • Icm: 1.76 kA @ 690 V

  • Icw: 0.8 kA (1 s) / 1.25 kA (0.2 s)

  • Mechanical endurance: 100,000 operations

  • Handle: black knob, 28.5 mm (external handle and shaft not included)

  • Lock: padlock provision

  • Max auxiliary contacts: 4 NO + 4 NC

  • Dimensions (W×H×D): 46×68×62 mm

  • Weight: 0.145 kg

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Abb Switch OT25G1-4BSN2 25A 4 Poles IEC frame G1
€17.27
€17.27

€17.27
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ABB OT25G1-4BSN2: reliable disconnection in reduced spaces

The ABB OT25G1-4BSN2 disconnector belongs to the OT range (frame G1) and is designed to offer safe and immediate disconnection in electrical panels. With a rated current of 25 A and 4P configuration, it is particularly suitable for three-phase systems with neutral or for applications where complete isolation of all conductors is required. The compact format facilitates integration even in dense panels, maintaining order and accessibility.

Switched fourth pole: neutral management with late-break/early-make logic

A distinctive feature is the position of the fourth pole on the right side with a switched function. The late-break / early-make logic means that the fourth pole (typically the neutral) opens last and closes first, improving safety during operations and reducing possible undesirable conditions during circuit opening/closing. It is a highly appreciated feature in distribution panels where the correct disconnection sequence is essential.

Electrical performance for operation and disconnection

The disconnector is suitable for the main categories of use:

  • AC-21A / AC-22A / AC-23A: 25 A at 415 V and 690 V

  • AC-23A power: 11 kW (415 V) and 22 kW (690 V)

These values make it suitable both for line disconnection and for operating typical loads in civil-commercial environments and small industrial plants.

Panel safety: Uimp 8 kV, Ui 800 V and padlockable locking

With Uimp 8 kV and Ui 800 V, the device offers adequate withstand for professional LV panels. The provision for padlockable locking is ideal for maintenance and lockout/tagout procedures, preventing unauthorized reactivations. The external handle and shaft are not included, allowing the control to be configured according to the installation (internal panel or dedicated external control).

Mechanical reliability and low dissipation

The declared mechanical endurance of 100,000 operations highlights a construction designed for frequent use. Additionally, the power loss is very low: 0.4 W per pole under nominal operating conditions, a useful detail to contain thermal dissipation in more compact panels.

TECHNICAL DATA
Main circuit cable sections Flexible with ferrule 1/2x Cu 0.75…4 mm²
Solid 1/2x Cu 0.75…6 mm²
Flexible 1x Cu 1.5…16 mm²
Flexible 2x Cu 1.5…6 mm²
Stranded 2x Cu 1.5…6 mm²
Conventional thermal current Ith 25 A
Conventional thermal current Ithe 25 A
Protection degree IP20 (front)
Fourth pole position Right side
Fourth pole type Switched – Late break / Early make
Handle colour Black
Handle length 28.5 mm
Handle type Knob handle (shaft not included)
Lock type Padlockable
Max auxiliary contacts 4 NO + 4 NC
Mechanical endurance 100,000 operations
Mounting type Base / DIN rail
Number of poles 4P
Operating mode Front
Pollution degree 3
Line terminal position Top–bottom / Bottom–top
Power loss per pole 0.4 W
Impulse withstand voltage (Uimp) 8 kV
Rated insulation voltage (Ui) 800 V (IEC 60947-1)
Rated current AC-21A 25 A (415 / 690 V)
Rated current AC-22A 25 A (415 / 690 V)
Rated current AC-23A 25 A (415 / 690 V)
AC-23A power 11 kW @ 415 V / 22 kW @ 690 V
Main circuit rated voltage 800 V
Closing capacity Icm 1.76 kA @ 690 V
Short-time withstand current Icw 0.8 kA (1 s) / 1.25 kA (0.2 s)
Recommended screwdriver Pozidriv 2
Control type Top mechanism
Terminal type Screw terminals
Tightening torque 1 N·m
Lug length 9–10 mm
DIMENSIONS
Width 46 mm
Height 68 mm
Depth 62 mm
Net weight 0.145 kg

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Data sheet

Voltage:
690V
Poles:
4P
Degree of protection:
IP20
Model:
OT Plus
Amps:
25A
Circuit Protections:
Disconnectors
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