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Battery combiner Victron BCD 402 40A for 2 batteries - this is a diode combiner of batteries, which allows you to provide critical loads with power from two DC sources simultaneously. If one source fails, the power is automatically maintained by the other, without the need for switching.
The device is designed specifically for mission-critical systems such as electronic engine control systems, telecommunications equipment, marine systems and emergency power systems.
Thanks to the use of Schottky diodes, the device has a low voltage drop, reducing heat loss and ensuring high efficiency.
Key advantages of the Victron BCD 402 battery combiner
- Connection of up to 2 batteries for one consumer
- Continuous power supply to the load, even if one source fails
- Low voltage drop thanks to Schottky diodes (≈0.3-0.45 V)
- Compatible with 12 V and 24 V systems
- Compact size and easy installation
- Passive operation without complex electronics
- No standby current consumption
- Ideal for critical systems that cannot be left without power
Technical specifications
- Article: BCD000402000
- Maximum continuous current: 40 A
- Number of connected batteries: 2
- Nominal system voltage: 12 V / 24 V
- Connection type: M6 screw terminals
- Voltage drop:
- ~0.3 V at low loads
- ~0.45 V at rated current
- Dimensions (mm): 60 x 120 x 75
- Weight: 0.8 kg
- Housing material: aluminum with cooling fins
- Mounting: only on a non-flammable surface (warning from the manufacturer)
Usage scenarios
- Critical motor control systems – uninterruptible power supply
- Telecommunication equipment – backup power supply
- Autonomous systems in campers and special equipment
- Marine vessels and navigation equipment
- Infrastructural backup power systems (alarm, control, security)
- Medical equipment – stable power supply without electronics that can fail
Technological features
- Composition of isolated power supplies
- Compatibility with any type of battery – AGM, GEL, LiFePO₄
- Operation scenario on small objects or embedded systems
- Passive operation without a controller or microcircuits – complete reliability
- High efficiency with small size and weight