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Siemens 3KF4440-2LF11
Switch disconnector with fuse 400 A, frame size 4
- MPN
- 3KF4440-2LF11
Price and lead time confirmed within 1 business day
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- 12-month warranty (new) · 3-month (used/refurbished)
- 30-day returns, no restocking fee on unused parts
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What is the Siemens 3KF4440-2LF11?
switch disconnector with fuse 400 A, frame size 4, 4-pole for LV HRC fuse size 1 and 2 front operating mechanism left complete unit with direct operating mechanism flat connector without fuses
Specifications
Model
| product brand name | SENTRON |
| product designation | 3KF switch disconnector with fuses |
| design of the product | 3KF switch disconnector with fuses |
| product version | 3KF NH |
| design of the actuating element | manual operating mechanism |
| design of handle | Direct operating mechanism, gray |
| direction of actuation | from the front |
| type of the driving mechanism motor drive | No |
| number of poles | 4 |
| size of disconnecting link | 2 and 1 |
| size of switch disconnector | 4 |
| size of fuse link | NH1, NH2 |
| mechanical service life (operating cycles) typical | 8 000 |
| electrical endurance (operating cycles) — at AC-23 A at 440 V | 3 000 |
| electrical endurance (operating cycles) — at AC-23 A at 690 V | 2 000 |
| electrical endurance (operating cycles) — at DC-23 A at 440 V | 1 000 |
| I2t value — with closed switch for combination switch + fuse at 500 V maximum | 1 205 000 A²·s |
| I2t value — with closed switch for combination switch + fuse at 400 V maximum | 1 205 000 A²·s |
| I2t value — with closed switch at 690 V for combination switch + gG fuse maximum | 1 300 000 A²·s |
| I2t value — of the fuse at 500 V maximum permissible | 2 150 000 A²·s |
| I2t value — of the gG fuse at 690 V maximum permissible | 2 600 000 A²·s |
| I2t value — of the aM fuse at 690 V maximum permissible | 2 600 000 A²·s |
| position of the switch operating mechanism | left |
| fuse system | LV HRC fuse |
| overvoltage category | IV |
| operating voltage with current paths in series — with degree of pollution 2 at DC rated value | 440 / 3 |
| operating voltage with current paths in series — with degree of pollution 3 at DC rated value | 440 / 3 |
| surge voltage resistance rated value | 12 kV |
Supply voltage
| operating voltage at AC rated value maximum | 690 V |
Protection class
| protection class IP | IP00 |
| protection class IP — with closed switch with cover or cable lug cover | IP20 |
| protection class IP — on the front | IP00 |
Dissipation
| power loss [W] — with conventional rated thermal current per pole | 26 W |
| power loss [W] — with conventional rated thermal current per device | 78 W |
| power loss [W] — with conventional rated thermal current without fuse per pole | 26 W |
| power loss [W] — with conventional rated thermal current without fuse per device | 78 W |
| power loss [W] — for rated value of the current at AC in hot operating state per pole | 26 W |
| power loss [W] — of the fuse per fuse maximum | 34 W |
Main circuit
| operating power at AC-23 A at 500 V rated value | 280 kW |
| operational current rated value | 400 A |
Auxiliary circuit
| number of connected NC contacts for auxiliary contacts | 0 |
| number of connected NO contacts for auxiliary contacts | 0 |
| number of connected CO contacts for auxiliary contacts | 0 |
| number of CO contacts for auxiliary contacts | 0 |
| number of NC contacts for auxiliary contacts | 8 |
| number of NO contacts for auxiliary contacts | 8 |
| suitability for use main switch | Yes |
| suitability for use switch disconnector | Yes |
| suitability for use EMERGENCY OFF switch | No |
| suitability for use maintenance/repair switch | Yes |
| product feature interlock | Yes |
| product function phase failure monitoring | No |
| product component — voltage trigger | No |
| product component — undervoltage release | No |
| product component — undervoltage release with leading contact | No |
| product feature sealable | Yes |
| product extension auxiliary switch | Yes |
| product extension optional locking capability | No |
| product extension optional motor drive | No |
| product extension optional fuse monitoring | Yes |
| product function — fuse monitoring | No |
| product function — overvoltage protection monitoring | No |
Short circuit
| short-circuit current making capacity (Icm) for switch disconnector at 690 V AC/440 V DC without fuse link rated value minimum | 24 kA |
| conditional short-circuit current with line-side fuse protection — at 500 V by gG fuse rated value | 100 kA |
| conditional short-circuit current with line-side fuse protection — at 690 V by gG fuse rated value | 100 kA |
Connections
| arrangement of electrical connectors for main current circuit | Top and bottom |
| tightening torque with screw-type terminals — minimum | 30 N·m |
| tightening torque with screw-type terminals — maximum | 44 N·m |
| type of connectable conductor cross-sections for aluminum conductor stranded with lug | 1x (6 ... 240 mm²), 2x (6 ... 150 mm²) |
| type of connectable conductor cross-sections — for copper busbar | 1x (30 x 10 mm²) |
| type of connectable conductor cross-sections for copper conductor — stranded with lug according to DIN 46234 | 1x (6 ... 240 mm²), 2x (6 ... 150 mm²) |
| type of connectable conductor cross-sections for copper conductor — stranded with lug according to DIN 46235 | 1x (16 ... 185 mm²), 2x (16 ... 150 mm²) |
| type of electrical connection for main current circuit | flat connector |
Mechanical Design
| height | 215 mm |
| width | 363 mm |
| depth | 269.6 mm |
| fastening method | floor mounting |
| fastening method — 4-hole front mounting | No |
| fastening method — front mounting with central attachment | No |
| fastening method — rail mounting | No |
| mounting position | any |
| Net Weight | 9.96 kg |
Environmental conditions
| ambient temperature during operation — minimum | -25 °C |
| ambient temperature during operation — maximum | 70 °C |
| ambient temperature during storage — minimum | -50 °C |
| ambient temperature during storage — maximum | 80 °C |
Downloads & documentation
Official documents from Siemens, downloaded directly from the manufacturer.
Data sheets & manuals
3KF4440-2LF11: frequently asked questions
When can 3KF4440-2LF11 be shipped?
3KF4440-2LF11 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up 3KF4440-2LF11 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for 3KF4440-2LF11 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 3KF4440-2LF11, subject to availability and destination.
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Siemens 3KF4440-2LF11Price and lead time confirmed within 1 business day
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