H2003B-3 - Eaton Thermal Unit

H2003B-3 - Eaton Thermal Unit

Engineered for dependable motor protection, the H2003B‑3 Eaton Thermal Unit (also known as a heater coil pack) delivers consistent performance in a compact footprint. Whether you’re managing small industrial drives, retrofitting legacy motor starters, or maintaining HVAC pump systems, this unit helps prevent damage due to overloads or short cycles. You’ll find it ideal when you want high reliability without sacrificing panel space.

Key Features and Benefits

• Compact, space-saving design: With rough dimensions of 3.2" × 1.8" × 1.8", it fits into tighter sections of control panels without interfering with other components.
• Accurate thermal protection: Operates over a full‑load amperage range of 0.56 A to 0.907 A, giving you precise overload trip performance.
• Class 20 standard trip: Designed to respond appropriately under overload conditions and help prevent nuisance trips under short cycle events.
• Triple-pack convenience: Ships as a set of three identical heater coils, making it easy to service three phases or have spares on hand.
• Seamless integration: Made to work with Eaton Freedom or Definite Purpose systems, and compatible with overload relays rated at 32 A or 75 A.
• Certified for safety: UL Listed and CSA certified, assuring compliance with recognized industry safety standards.

Technical Specifications

• Part Number: H2003B‑3
  
• Full Load Range: 0.56 A to 0.907 A
  
• Trip Classification: Class 20 (Standard Trip)
  
• Package Quantity: 3 heater coils per pack
  
• Dimensions (L × W × H): Approx. 1.8" × 1.8" × 3.2"
  
• Weight (each): ~0.25 lb
  
• Suitable Relay Ratings: 32 A or 75 A overload relays
  
• Agencies / Approvals: UL Listed, CSA Certified
  

Material Compliance and Certifications

• Industry Standards: This heater coil uses materials that meet industry norms for electrical insulation and thermal tolerance. It holds UL Listing and CSA Certification, assuring that it adheres to stringent safety guidelines. The design meets requirements for motor control thermal protection and has been qualified for use in both NEMA and IEC systems.

Where It Works Best

• Industrial manufacturing & process lines – Ideal for conveyor drives, mixers, extruders, packaging systems, and similar motor‑driven equipment where precise overload protection is needed.
• HVAC, water pumps & compressors – Helps safeguard motors against overheating or current surges in fans, chillers, pumps, or compressors.
• OEM machinery & equipment builders – Offers a compact, dependable thermal protection module for motor-driven subassemblies.
• Replacements & retrofits – Especially useful when upgrading or downsizing older control systems. Its small size and compatibility often reduce rewiring or panel changes.