Flat Rectangular Coil Heater for Precision Hot Runner Heating

Flat Rectangular Coil Heater is a precision heating element designed for hot runner nozzles, injection molds, and compact industrial heating applications. Its flat rectangular cross-section provides a larger contact area than traditional round coil designs, improving heat transfer efficiency and helping maintain stable temperature control in limited installation spaces.

Available in 2.2×4.2 mm, 4.0×2.0 mm, and 4.5×2.7 mm cross-sections, this coil heater can be customized according to heating length, inner diameter, voltage, wattage, and lead-wire requirements.

Flat Rectangular Coil Heater Features

• Flat rectangular cross-section for increased contact area and efficient heat transfer
• Available in 2.2×4.2 mm, 4.0×2.0 mm, and 4.5×2.7 mm configurations
• Suitable for narrow installation gaps and compact hot runner systems
• Inner diameter tolerance of ±0.15 mm
• Minimum bending radius ≥8 mm
• Maximum actual working temperature up to 500°C
• Maximum actual watt density up to 9 W/cm²
• Standard 300 mm lead length, customizable
• PTFE high-temperature lead wire with optional stainless steel braided sleeve
• K-type or J-type thermocouple available as an option
• Custom heating length, voltage, wattage, and lead configuration

Product Specifications

Flat Rectangular Coil Heater Applications

The flat profile is suitable for applications where installation space is limited and efficient heat transfer between the heater and heated component is required.

• 3C precision injection molds
• Medical plastic component hot runner nozzles
• Precision plastic injection molding
• Hot runner systems with narrow installation gaps
• Nozzle heating requiring efficient heat transfer
• Compact industrial heating assemblies

Why Choose the Flat Rectangular Configuration?

The rectangular profile provides a larger contact area compared with conventional round coil designs. This structure improves heat transfer efficiency and is suitable for hot runner systems and precision molds where installation space is limited.

With a maximum actual watt density of up to 9 W/cm², this configuration can support demanding heating requirements when properly matched with the application conditions.

Custom Flat Rectangular Coil Heaters

EaseWise supplies custom heating elements according to customer drawings, samples, and application requirements. Dimensions and electrical specifications can be adjusted to match available installation space and required heating performance.

• Custom cross-section
• Custom inner diameter
• Custom heating length
• Custom voltage and wattage
• Custom watt density
• Custom lead length
• Radial, tangential, or axial lead-out options
• K-type or J-type thermocouple option
• PTFE lead wire or stainless steel braided protection
• OEM production according to drawings or samples

Send us your nozzle diameter, required heating length, voltage, wattage, and quantity for a custom quotation.

Coil Heater Series

EaseWise provides different coil heater configurations for hot runner systems and precision injection molding applications. The best configuration depends on installation space, contact area, flexibility, and required heating performance.

• Round Coil Heater – Flexible cylindrical heating solution for hot runner nozzles and manifold sleeves.
• Square Coil Heater – Larger contact surface for continuous-production molds.
• Micro Mini Coil Heater – Compact heating solution for miniature hot runner systems and limited spaces.
• Pressed-in Brass Coil Heater – Rigid close-contact heating assembly for precision molds.
• Hot Runner Spring Coil Heater – Spring-type heating solution with thermocouple options.

Request a Flat Rectangular Coil Heater Quote

Need a standard configuration or a custom heating element? Send us your required cross-section, inner diameter, heating length, voltage, wattage, and quantity. EaseWise can recommend a suitable heating solution based on your application requirements.

Request a Quote for your flat rectangular coil heater requirements.

Standard and custom flat rectangular coil heating solutions are available for hot runner and precision molding applications.