Danfoss Brushless DC
Hermetic Compressors

BD80F

The BD80F compressor is one of the most recent and powerful addition to the Danfoss DC compressor line.  The compressor was introduced in mid-2005 and combines over 25 years of experience in a compact and highly efficient unit.  Like the smaller BD35F and BD50F models (below), the BD80F uses an electronically commutated permanent magnet brushless DC motor.  The advantages of this approach are small size, high efficiency and variable-capacity.  Also, as with its predecessors, the BD80F requires the use of an electronic power module.  While the majority of the modules for the two smaller compressors are compatible for both compressors, the module for the BD80F is different.  It includes an internal cooling fan (cooling kit 071-0500 is not required) and incorporates a special "Adaptive Energy Optimizing (AEO)" feature.  The AEO feature allows the compressor to adapt its speed to the actual cooling demand resulting in additional energy efficiency.

NOTE:  The BD80F compressor requires a Power Module to run.  The same module is used for 12vdc and 24vdc systems.  The module must be purchased separately from the compressor.  For additional technical information, see Danfoss BD80F Specifications and Wiring.   

BD50F

The BD50F is next in line to the BD80F compressor.  Like the smaller BD35F (below) and larger BD80F (above), the BD50F uses an electronically commutated permanent magnet brushless DC motor.  The advantages of this approach are small size and variable-capacity.  As with its predecessors, the BD50F does require the use of an electronic power module.  Like all electronics, the power module is extremely reliable as long as it is properly installed and does not overheat.  (To prevent overheating use our Danfoss Power Module Cooling Fan Kit.) 

NOTE:  The BD50F compressor requires a Power Module to run.  The same power module is used for 12vdc and 24vdc systems.  The module must be purchased separately from the compressor.  There are three types of modules to choose from, the standard power module (010-1175), the Adaptive Energy Optimizing (AEO) module (010-1176), or the High Start module (010-1178).  The AEO module is more energy efficient as the compressor will always adapt its speed to the actual cooling demand.  The High Start module provides additional starting torque  and is more dependable in turning the system on.  For additional technical information, see Danfoss BD50F Specifications and Wiring.

BD35F

With the discontinuation of the BD 3.0 and 2.5, the BD35F is now the smallest of the direct DC compressors.  It has the same features, size and weight as the BD50F and BD80F but has a lower capacity and slightly lower efficiency.  Because of its lower capacity, it is the preferred replacement for existing systems using the older compressor models.  The BD35F requires the use of an electronic power module.  As with the BD50F, the power module is extremely reliable as long as it is properly installed and does not overheat.  (To prevent overheating use our Danfoss Power Module Cooling Fan Kit.)  

NOTE:  The BD35F compressors require a Power Module to run.  The same power module is used for 12vdc and 24vdc systems.  The modules must be purchased separately from the compressor.  There are two types of module to choose from, the standard power module (010-1175) or the Adaptive Energy Optimizing module (010-1176).  The AEO module is more energy efficient as the compressor will always adapt its speed to the actual cooling demand.  For additional technical information, see Danfoss BD35F Specifications and Wiring.

Danfoss Power Modules
For Older (4-Pin) Compressors.

Feb. 19, 2003 - Danfoss has discontinued production of all 4-pin modules.  Owners of older 4-pin compressors will need to replace both the module and compressor with either the BD35F or BD50F above.  Our 011-1010 Danfoss Retrofit DIY Kit is the perfect step-by-step solution for module and compressor replacement.