Name: Siemens 3KF33250MF51 Circuit breaker Fuse size = 1 250 A 690 V AC 1 pc(s)
Brand: Siemens
SKU: 2864050

An electrically operated switch by Siemens with two main and two auxiliary contacts. A key component in electrical control systems.

Circuit diagram of an electrical switch with three parallel terminals, numbered 1 to 6. Two vertical dividing lines mark the terminals.

Technical drawing of an electrical switch with dimensions and various views, including front and side elevation.

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Product type

Circuit breaker

Fuse size

Number of pins

Nominal current - rounded value

250 A

Type

3KF circuit breakers with fuses

Datasheet (PDF)

EAN:

Part number:

Item no:

Unavailable

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Technical specifications

Design of electrical connection / for main circuit: Flat connection
Display design / for door clutch rotary actuator switch position indicator: ON-OFF TEST
Layout of electrical connection / for main circuit: Top and bottom
Number of NO contacts / for auxiliary contacts: 8
Number of NC /for auxiliary contacts: 8
Tightening torque / with screw connection / minimum: 30 Nm
Tightening torque / for screw connection / maximum: 44 Nm
Design of the device: Fixed installation
Frame size of the separation pad: 1 and 0
Design size of the circuit breaker: 3
Limited short-circuit current (IQ): 100000 A.
Mounting type: Floor mounting
Operating power / at AC-23 A / at 400 V: 132000 W
Operating power / at AC-23 A / at 690 V: 250 kW
Forward current / with switch closed / at 690 V / with combination switch + AM fuse / maximum permissible: 30310 A.
Forward current / with closed switch / at 690 V / with combination switch + gG fuse / maximum permissible: 30310 A.
Forward current / with switch closed / for combination switch + fuse / at 500 V / maximum permissible: 28700 A.
Forward current / the fuse / at 400 V / maximum permissible: 33700 A.
Forward current / the fuse / at 690 V / maximum permissible: 39700 A.
Suitability for use / main switch: Yes
Suitable for use / switch disconnectors: Yes
Suitable for use / EMERGENCY STOP switch: Yes
Suitable for use / safety switch: Yes
Suitable for use / Maintenance/Repair switch: Yes
All mounting positions permitted
Electrical life (switching cycles) / at AC-23 A / at 440 V: 5000
Electrical life (switching cycles) / at AC-23 A / at 690 V: 4000
Electrical life (switching operations) / at DC-23 A / at 440 V: 1000
Mechanical life (cycles) / typical: 10000
Insulation voltage (UI) 1000 V
Position / of actuator: Front
Position / manual drive: After the first pole
Product extension / auxiliary switch: Yes
Product extension / optional / lockable: Yes
Product extension / optional / fuse monitoring: Yes
Protection class IP: IP00
Protection class IP / with switch closed / with aperture or cable shoe cover: IP00
Surge voltage resistance: 12 kV
Ambient temperature / during operation / minimum: -25 °C.
Ambient temperature / during operation / maximum: 70 °C.
Power loss/maximum 153 W.
Pollution level 3
Type of connectable conductor cross-sections / for copper conductors / multi-wired / with cable lugs / according to DIN 46234: 1x (6 ... 240 mm²), 2x (6 ... 120 mm²) / 1x (AWG 8 ... 4/0), 2x (AWG 8 ... 2)
Type of connectable conductor cross-sections / for copper conductors / multi-wired / with cable lugs / according to DIN 46235: 1x (6 ... 240 mm²), 2x (6 ... 120 mm²
Type of connectable conductor cross-sections / for Cu power rails: 1x (25 x 3 mm²)

Type: 3KF circuit breakers with fuses

Product type: Circuit breaker

Fuse size: 1

Number of pins: 3

RoHS-compliant: Yes

Dim: (W x H x D) 248.9 x 207 x 178.5 mm

Content: 1 pc(s)

Nominal current: 250 A

Nominal current - rounded value: 250 A

Nominal voltage: 690 V AC

Width: 248.9 mm

Height: 207 mm

Depth: 178.5 mm

UKCA: yes

Documents & Downloads

Datasheet

Datasheet 2864050 Siemens 3KF33250MF51 Circuit breaker Fuse size = 1 250 A 690 V AC 1 pc(s)

User & Safety Instructions

User & Safety Instructions 2864050 Siemens 3KF33250MF51 Circuit breaker Fuse size = 1 250 A 690 V AC 1 pc(s)

Description

Switch disconnectors with 3KF SITOR, 250A, size: 3, 3-pole, for NH fuse sizes 0 and 1 for semiconductor protection, front-wheel drive, center, basic unit without handle, flat connection without fuses

This text is machine translated.