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Note: All 41-400 series ignitors are 120 VAC models. Some hot surface modules are rated for 208/240 volts input, however they step the voltage down to 120 VAC.
Robertshaw's 41-400 Series Norton Hot Surface Ignitors deliver dependable ignition heating systems of every description. From furnaces and boilers to rooftop heaters, infrared burners, unit heaters, water heaters, and many other types of HVAC equipment.
The 41-400 Series Hot Surface Ignitors are made of high purity recrystalized silicon carbide which combines physical and thermal strength with stable electrical properties. The 41-400 Series are designed to reach ignition temperatures within 17 seconds. These Hot Surface Ignitors have 18-gauge nickel chrome lead wires embedded and metalized in place for maximum holding strength and electrical conductivity. The lead wires are also enclosed with a special high-temperature fiberglass insulation providing total electrical protection.
Specifications:
- Ceramic Block Style: C, 2" wide
- Terminal Connector Type: D
- Lead Wire Length: 4-1/2"
Mode of Operation - Upon application power, the load is energized. When the thermostat or other switch opens or there is a loss of power, the load is de-energized and the delay period begins. The compressor will not start again during the delay period. Restart occurs after the delay period has elapsed.
Installation & Operation Notes:
- Disconnect power at all sources and verify that all circuits are de-energized before starting work
- Mount the contactor securely in the control compartment or electrical panel as directed by the equipment manufacturer
- Move line, load, and control wires from the existing contactor to the new contactor, matching wiring diagrams and terminal markings
- After energizing the system, verify that the contactor pulls in and opens cleanly, with proper operation during system start and stop cycles
- Confirm that all terminations are tight and that wiring is supported to prevent strain at the terminals
Maintenance & Troubleshooting:
- Inspect the contactor during routine HVAC maintenance for pitted or burned contacts, coil discoloration, or mechanical binding
- Replace the contactor if the coil fails to energize, if the contacts do not close fully, or if there is evidence of overheating or excessive humming
- If repeated contactor issues occur, verify that load current and control voltage are within specification and that short cycling is not overstressing the contactor
Certifications & Compliance:
- Meets ARI 780/790 Standard
User Reviews & Q&A Summary:
- Common theme is "correct part" for the intended replacement, with users reporting it worked as expected after installation
- Review feedback frequently mentions straightforward installation for a direct replacement
- Value and fulfillment are recurring positives (good deal/price and fast shipping)
Product Highlights
0.25 A @ 0.25 to 12 Vdc, 5.1A @ 240 Vac, 8A @ 120 Vac   
Fixed    
SPST, Contacts Break on Temp Rise    
Horizontal, Vertical    
5-5/8" Â Â Â 
2-1/8" DepthSpecs
| Application: | High Limit Low Limit |
|---|---|
| Bulb Size: | 3/8" x 2-7/8" |
| Capillary Length: | 3" |
| Switch Action: | SPST Contacts Break on Temp Rise |
| Electrical Rating: | 0.25 A @ 0.25 to 12 Vdc 5.1A @ 240 Vac 8A @ 120 Vac |
| Electrical Ratings (ALR): | 48A @ 120 Vac 30.6A @ 240 Vac |
| Max Temp Differential: | 2°F |
| Differential: | Fixed |
| Max Ambient Temp (°F): | 150°F |
| Height: | 5-5/8" |
| Width: | 2" |
| Depth (Inches): | 2-1/8" |
| Well Included: | No |
| Mount: | Horizontal Vertical |
| Temperature Range (F): | 40°F to 180°F |
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