3-Phase Bridge Rectifier 50A 1200V – Stable DC voltage with minimal ripple for demanding industrial applications
When powering an inverter, VFD, or battery charging system, the last thing you need is unstable DC voltage with high ripple. This 3-phase bridge rectifier (50A / 1200V) provides the perfect solution—delivering full-wave rectification of all three AC phases for a clean, predictable DC output. It is compact, robust, and ready for seamless integration.
Note: For continuous operation near the 50A limit, we recommend mounting the unit on an external heatsink or ensuring adequate forced airflow.
Why choose this model? (Key Advantages):
- 50A / 1200V — generous safety margin — handles medium-power industrial applications without running at the component’s limit, ensuring a longer service life.
- Dual-purpose aluminium housing — provides both mechanical protection and passive heat dissipation; lowers junction temperature without the need for extra components.
- Significantly lower ripple than single-phase rectifiers — the 6-diode configuration rectifies all 3 phases simultaneously, resulting in a much smoother DC output.
- Quick 5-minute installation — the 6 mm mounting hole allows for direct attachment to a heatsink or control panel without special adapters.
- Proven versatility — ideal for 3-phase inverters, industrial power supplies, VFDs, welding equipment, and solar energy storage systems.
Performance and Specifications
The classic 6-diode bridge design fully rectifies all three phases of the AC supply, delivering DC voltage with minimal ripple—ready to be used as an input stage for additional LC or capacitive filters. For a standard 400V 3-phase network (line voltage), the DC output voltage before filtering is approximately 540V DC.
The compact 60 x 31 mm dimensions allow for easy integration into electrical cabinets, power supply units, or automation equipment where space is at a premium. The aluminium casing is more than just structural; it actively dissipates heat generated during continuous operation, extending the lifespan of the internal diodes.
| Parameter | Value / Detail |
|---|---|
| Maximum Current | 50A |
| Maximum Blocking Voltage | 1200V |
| Rectification Type | 3-Phase Bridge (6 diodes) |
| Housing Material | Aluminium (passive heat dissipation) |
| Colour | Silver |
| Dimensions | 60 x 31 mm (approx.) |
| Mounting Hole Diameter | 6 mm (approx.) |
| DC Output Voltage (400V AC line) | ~540V DC (pre-filtering) |
| Main Applications | Inverters, industrial power supplies, VFDs, battery chargers, solar systems |
Package Contents
- 1 x 3-Phase Bridge Rectifier 50A 1200V – Aluminium Housing
Frequently Asked Questions
What is the practical difference between a single-phase and a 3-phase rectifier?
A 3-phase rectifier rectifies all three AC phases simultaneously, rather than just one. The result is a DC output with significantly lower ripple, providing more stable power to your equipment without requiring massive additional filtering.
Do I need an external heatsink?
For currents below 30-35A and intermittent use, the aluminium housing is sufficient on its own. For currents approaching 50A or prolonged continuous operation, an external heatsink or forced airflow is recommended to keep junction temperatures within safe limits.
How do I connect the rectifier correctly?
The three input terminals (A, B, C or ~) connect to the three phases of your 3-phase AC source. The + and − terminals represent the DC output. Always observe correct polarity at the output; reversing it can damage your connected equipment.
Does it work in solar systems with 3-phase inverters?
Yes. It is compatible with solar systems that utilise 3-phase inverters or DC-DC converters requiring a rectification stage for AC generators coupled to solar panels.
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