Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
BFK3800A400 – 3P CONTACTOR 30KVAR 400V 50/60HZ
Lovato BFK3800A400 three-pole power factor correction contactor with AC control circuit, built-in limiting resistors, 30 kvar rating at 400 V and 400 V AC 50/60 Hz coil for capacitor bank switching applications.
£138.37
Why Choose the Lovato BFK3800A400 Power Factor Correction Contactor?
The Lovato BFK3800A400 is a compact and robust three-pole power factor correction contactor designed for controlled capacitor bank switching in industrial electrical panels, reactive power compensation systems and automatic power factor correction assemblies. As part of the Lovato BFK38 series, it is purpose-built for AC-6b capacitor switching duties and includes limiting resistors to help reduce high inrush current when capacitor stages are energised.
This contactor is rated for a maximum IEC operational power of 30 kvar at 400 V, with additional capacitor switching ratings of 17 kvar at 230 V, 33 kvar at 440 to 480 V and 36 kvar at 690 V. It uses a 400 V AC 50/60 Hz coil, making it suitable for switchboards and control panels where a 400 V AC command supply is required.
With 3 normally open main poles, 56 A conventional free air thermal current, screw or 35 mm DIN rail mounting, IP20 terminal protection when correctly wired and recognised international approvals, the BFK3800A400 is a dependable choice for capacitor switching stages where compact size, controlled inrush performance and long service life are required.
Key Advantages
- Purpose-built capacitor switching contactor for power factor correction systems.
- 30 kvar at 400 V maximum IEC operational power rating.
- Integrated limiting resistors help reduce capacitor inrush current.
- 400 V AC 50/60 Hz coil for compatible industrial AC control circuits.
- 3-pole design with normally open main contacts.
- 56 A conventional free air thermal current for capacitor switching assemblies.
- 1.4 million electrical cycles and 20 million mechanical cycles.
- Suitable for screw fixing or 35 mm DIN rail mounting.
- Certified to major IEC, EN, BS, UL and CSA contactor standards.
Key Features
- Lovato BFK38 series capacitor switching contactor.
- AC control circuit with built-in limiting resistors.
- Rated operational power: 30 kvar at 400 V AC-6b.
- Number of poles: 3.
- Main contact configuration: 3 normally open contacts.
- Built-in auxiliary contacts: 0.
- Rated coil voltage: 400 V AC at 50/60 Hz.
- Conventional free air thermal current Ith: 56 A.
- Rated insulation voltage Ui: 690 V.
- Rated impulse withstand voltage Uimp: 6 kV.
- Rated operational current: 43 A.
- Making capacity: 380 A RMS.
- Power terminal protection: IP20 when correctly wired.
- Fixing: screw mounting or 35 mm DIN rail.
Reliable Capacitor Switching for Power Factor Correction Panels
Power factor correction contactors are designed to switch capacitor stages safely and repeatedly in automatic capacitor banks. When capacitors are energised, high transient inrush current can occur. The Lovato BFK3800A400 uses built-in limiting resistors to help reduce these current peaks, supporting longer contactor life and more stable capacitor bank operation.
The 30 kvar at 400 V rating makes this model suitable for larger capacitor bank stages where compact installation, reliable AC control operation and repeatable switching performance are required. Its 400 V AC 50/60 Hz coil, BFK38 frame, controlled inrush design and IP20 front protection make it straightforward to integrate into professional power factor correction panels.
Typical Applications
- Automatic power factor correction capacitor banks.
- Reactive power compensation panels.
- Industrial electrical distribution systems.
- Capacitor switching stages up to 30 kvar at 400 V.
- Commercial and industrial energy management systems.
- Low-voltage switchgear and control panels.
- OEM power factor correction equipment.
- Installations requiring a 400 V AC control coil.
Technical Specifications
Tick the specs you need, then view products that match.
| Terminal Type | Screw | |
|---|---|---|
| Coil Voltage Range | 380–440 V | |
| Device Type | Capacitor Switching Contactor | |
| Current | 43 A | |
| Voltage | 400 V | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Coil / Supply Voltage | 400 V AC | |
| Auxiliary Contacts | None | |
| Coil Type | AC | |
| Current AC-1 | 56 A | |
| Series | BFK38 | |
| Product designation | Power contactor | |
| Product type | Contactor for power factor correction with AC control circuit | |
| Application | Capacitor bank and power factor correction switching | |
| Number of poles | 3 | |
| Main contact configuration | 3 NO | |
| Type of coil | AC coil 50/60 Hz | |
| Rated coil voltage | 400 V AC at 50/60 Hz | |
| Operational frequency | 25 to 400 Hz | |
| IEC operational power at 230 V | 17 kvar | |
| IEC operational power at 400 V | 30 kvar | |
| IEC operational power at 440 to 480 V | 33 kvar | |
| IEC operational power at 690 V | 36 kvar | |
| Rated operational current | 43 A | |
| IEC conventional free air thermal current Ith | 56 A at ≤40 °C | |
| Rated insulation voltage Ui | 690 V | |
| Rated impulse withstand voltage Uimp | 6 kV | |
| Short-time allowable current | 320 A for 10 s | |
| Protection fuse | 63 A gG | |
| Making capacity | 380 A RMS | |
| Breaking capacity | 304 A at 440 V, 240 A at 500 V, 192 A at 690 V | |
| Average resistance per pole | 2 mΩ | |
| Power dissipation per pole at Ith | 6 W | |
| Terminal tightening torque | 2.5 to 3 Nm | |
| Coil terminal tightening torque | 0.8 to 1 Nm | |
| Maximum connectable wires per terminal | 2 | |
| Maximum conductor section | 6 AWG/kcmil | |
| Flexible conductor section without lug | 2.5 to 16 mm² | |
| Flexible conductor section with lug | 1 to 10 mm² | |
| Flexible conductor section with insulated spade lug | 1 to 10 mm² | |
| Power terminal protection | IP20 when properly wired | |
| Operating position | Vertical plane, allowable ±30° | |
| Mounting type | Screw fixing / 35 mm DIN rail | |
| Approximate dimensions | 45 x 126 x 123 mm | |
| Weight | 492 g | |
| Mechanical life | 20,000,000 cycles | |
| Electrical life | 1,400,000 cycles | |
| B10d rated load cycles | 400,000 | |
| B10d mechanical load cycles | 20,000,000 | |
| Maximum mechanical operating frequency | 3,600 cycles/h | |
| AC coil operating range at 50 Hz | 80 to 110% Us pick-up, 20 to 55% Us drop-out | |
| AC coil operating range at 60 Hz | 85 to 110% Us pick-up, 20 to 55% Us drop-out | |
| AC coil consumption at 50 Hz | 75 VA inrush, 9 VA holding | |
| AC coil consumption at 60 Hz | 70 VA inrush, 7 VA holding | |
| Dissipation at holding | 2.5 W at 50 Hz | |
| Average closing time | 8 to 24 ms | |
| Average opening time | 5 to 15 ms | |
| UL rated operational voltage | 600 V AC | |
| UL general use current | 56 A | |
| Operating temperature | -50 °C to +70 °C | |
| Storage temperature | -60 °C to +80 °C | |
| Maximum altitude | 3,000 m | |
| Pollution degree | 3 | |
| EMC compatibility | Yes | |
| ETIM classification | EC001079 - Capacitor contactor | |
| Package quantity | 10 | |
| Package dimensions | 265 x 265 x 135 mm | |
| Package volume | 948.038 cm³ | |
| EAN | 8013975164372 | |
| Certifications | CCC, EAC, cULus | |
| Standards | IEC/EN/BS 60947-1, IEC/EN/BS 60947-4-1, UL 60947-1, UL 60947-4-1, CSA C22.2 No. 60947-1, CSA C22.2 No. 60947-4-1 | |
| HS Code | 85365080 |
Frequently Asked Questions
What is the Lovato BFK3800A400 used for?
The Lovato BFK3800A400 is used for switching capacitors in automatic power factor correction systems, reactive power compensation panels and industrial capacitor bank assemblies.
What is the kvar rating of the BFK3800A400?
It is rated for 30 kvar at 400 V. It is also rated at 17 kvar at 230 V, 33 kvar at 440 to 480 V and 36 kvar at 690 V for AC-6b capacitor switching duty.
What coil voltage does this contactor use?
The BFK3800A400 uses a 400 V AC 50/60 Hz coil, making it suitable for compatible industrial AC control circuits in power factor correction panels.
Does the BFK3800A400 include limiting resistors?
Yes. The contactor includes limiting resistors to help reduce capacitor inrush current when capacitor stages are switched on.
Does this contactor include auxiliary contacts?
No. This BFK3800A400 variant has 0 built-in auxiliary contacts. External auxiliary contact blocks may be selected separately where signalling or interlocking is required.
How is the Lovato BFK3800A400 mounted?
It can be installed using screw fixing or mounted on a standard 35 mm DIN rail, making it suitable for capacitor bank panels and electrical control cabinets.
Trusted by Panel Builders and Energy Engineers
Lovato BFK capacitor switching contactors are trusted by panel builders, facilities engineers and energy management specialists for dependable power factor correction, compact installation and reliable capacitor switching performance in industrial electrical systems.
