The Danfoss 103N0011 is a PTC (Positive Temperature Coefficient) starting device engineered to provide dependable start-up assistance for hermetic and semi-hermetic refrigeration compressors. PTC starting devices leverage the self-regulating electrical resistance properties of PTC thermistors to deliver a high-current starting boost and then automatically limit current draw once the compressor is running — eliminating the need for mechanical relay components and reducing maintenance requirements.
Designed for use in refrigeration and air conditioning applications, the Danfoss 103N0011 is a direct, compact solution for improving compressor starting torque, particularly in systems where low voltage conditions or high back-pressure may otherwise hinder reliable start-up. Its solid-state design means no moving parts, resulting in a long service life and consistent performance across repeated start cycles.
Key Features
- PTC thermistor-based solid-state starting device — no moving parts
- Provides high starting current boost to assist compressor start-up
- Automatically self-limits current after start cycle completes
- Compatible with hermetic refrigeration and air conditioning compressors
- Compact design for easy installation in tight equipment spaces
- Reduces wear compared to mechanical start relays
- Danfoss quality engineering for long service life and reliability
Applications
- Refrigeration compressor starting assistance
- Air conditioning systems with difficult starting conditions
- Low-voltage or high back-pressure starting scenarios
- Replacement for worn or failed compressor start relays
Why Choose Danfoss?
Danfoss is a globally recognized leader in refrigeration and HVAC controls, delivering innovative, energy-efficient solutions trusted by technicians and engineers worldwide. The 103N0011 PTC Starting Device reflects Danfoss’s commitment to reliable, low-maintenance components that keep refrigeration systems operating at peak performance.
