Overview
The Hotwatt SC62-3 cartridge heater is a standard industrial heating element manufactured by Backer Hotwatt, an industry leader in electric heating since 1952. This model provides 250W of heat output at 120V AC, making it suitable for localized heating in dies, platens, processing equipment, HVAC systems, and refrigeration applications. The SC62-3 features a stainless steel sheath and operates at 50W/sq.in. power density with maximum surface temperatures reaching 1,250°F, enabling precise thermal control in restricted work areas.
Key Features
- 250W power output at 120V AC for reliable heat delivery
- 5/8″ diameter × 3″ length for compact installation in standard reamed holes
- Stainless steel sheath with 1,250°F maximum surface temperature rating
- 12″ fiberglass-insulated leads (Type SF1) for safe electrical connection
- 50W/sq.in. power density for efficient heat transfer and extended element life
- Precision manufacturing with tight tolerances ensures optimal fit and performance
Technical Specifications
- Power Output: 250W
- Voltage: 120V AC
- Diameter: 5/8″ (0.625″)
- Length: 3″
- Lead Type: 12″ fiberglass-insulated (SF1)
- Power Density: 50W/sq.in.
- Sheath Material: Stainless Steel (Series 300)
- Maximum Surface Temperature: 1,250°F
- Heating Element: Nichrome wire in magnesium oxide (MgO) ceramic
- Weight: 0.21 lbs
- Diameter Tolerance: ±0.001″ to ±0.009″ (slide fit into standard reamed holes)
- Length Tolerance: ±2% with 1/16″ minimum
Typical Applications
Cartridge heaters of the SC62-3 specification are widely used in:
- HVAC and refrigeration equipment for auxiliary heating
- Dies and injection molding platens for precise temperature control
- Hot-melt adhesive dispensing systems
- Heat sealing and packaging machinery
- Industrial processing equipment requiring localized heat
- Laboratory and scientific instrument heating
- Equipment where close thermal regulation prevents thermal shock and extends heater life
Compatibility & Replacements
Compatible With
- Any standard heating cavity or hole drilled and reamed to 5/8″ nominal diameter
- 120V AC electrical systems (single-phase)
- Temperature control systems and thermostats requiring localized heating
- HVAC and refrigeration component assemblies
- Industrial dies, molds, and processing platens
Replaces / Drop-In Replacement For
- Earlier-generation Hotwatt SC62-3 units
- Equivalent OEM cartridge heaters with matching 5/8″ × 3″ dimensions and 250W/120V rating
- Standard 250W 120V cartridge heaters from competing manufacturers with identical form factor
Works With
- 120V AC single-phase power supplies
- Industrial thermostats and temperature controllers
- Thermal management systems in HVAC and refrigeration units
- Molding and die-heating equipment from multiple manufacturers
- Variable transformer and silicon rectifier input voltage regulation (for extended life at high temperatures)
