Home improvement replacement that helps compressors start dependably in refrigeration and freezer systems, the Danfoss Start Relay 103N0021 suits common repair jobs. Reliable operation brings peace of mind for property owners and workshop technicians. Is it the right fit for a DIY swap or a professional repair?
⚡ At a Glance
- • Starting Performance: Consistent starting behaviour for refrigeration and freezer compressors, supported by user feedback
- • Best for: Technicians and competent DIYers replacing worn start relays in refrigeration and freezer compressors
- • Not ideal for: Installations that require manufacturer-specific starter modules or integrated electronic protection
Compact start relay designed for basic start control in compressor circuits. User feedback highlights dependable operation and straightforward replacement.
Dependable starts – with 220–230 V rating
Rated for operation at 220–230 V, designed to work within the voltage range typical of domestic and light commercial refrigeration circuits. The electrical rating aligns with standard compressor starter requirements.
Consistent starts reduce failed-start events and help maintain steady cooling performance, lowering the chance of unexpected downtime.
Quick wiring – thanks to 4.8 mm terminal connection
Uses a 4.8 mm terminal interface that matches common compressor wiring practices, enabling secure push-fit or crimp connections. The terminal size offers a familiar fit for technicians.
Faster swap-outs cut workshop time and make routine repairs more approachable for competent DIYers.
Practical replacement option – with broad compressor compatibility
Specified for use in various compressors and noted by users as a successful replacement for original relays. Compatibility covers a range of standard compressor starter configurations.
Suitable for routine maintenance and repairs where a like-for-like relay is required, reducing the need for specialist parts sourcing.
✨ The 4 Key Reasons for Danfoss Start Relay 103N0021
- Replacement quality – Confirmed by users as a reliable direct substitute for originals
- Dependable operation – Users report steady starts, reducing unexpected compressor downtime
- Broad suitability – Compatible with a range of compressors for common refrigeration tasks in workshops and homes
- Simple electrical connection – 4.8 mm terminal allows straightforward wiring and secure contact
📋 Technical Details at a Glance
- Category: Home Improvement
- Brand: Danfoss
- Model: Start Relay 103N0021
- Product ID: B00FVV0GZC
- Connection: 4.8 mm terminal
❓ Frequently Asked Questions
Q: Is the relay rated for UK mains refrigeration systems?
A: Yes. The relay is specified for 220–230 V operation, matching typical UK refrigeration supplies.
Q: What terminal size does the relay use for wiring?
A: The relay uses a 4.8 mm connection suitable for common compressor terminal fittings.
Q: Can it replace original start relays?
A: User reviews indicate successful replacement of original relays in various compressors, making it suitable for routine swaps when compatible.
🏆 Our Verdict
The Danfoss Start Relay 103N0021 suits technicians and competent DIYers who need a straightforward replacement for refrigeration compressor starters. Reliable starting behaviour, a standard 4.8 mm terminal and 220–230 V rating make it practical for common refrigeration repairs. Long-term value comes from dependable operation and fewer repeat fixes, making it a sensible maintenance choice.
