Overview
The Cutler Hammer 177C524G09 FH09 Type A heater is a thermal overload relay heater element designed for A200 and B100 series magnetic motor starters. This Class 20 heater is a standard-trip element engineered to protect three-phase AC motors by interrupting circuit current when motor temperature exceeds design limits. It is used in NEMA Size 0, 1, and 2 starters and is UL/CSA certified for reliable performance in industrial motor control applications.
Key Features
- Type A & B Compatible: Works with Type A and B thermal overload relays in A200/B100 series starters
- Class 20 Fast-Trip: Provides fast, dependable protection with standard tripping characteristics
- Motor Current Range: 0.47–0.58 amps full-load motor current in ambient conditions; 0.44–0.47 amps non-compensated
- Temperature Rated: Protects 40°C rise motors and open/drip-proof motors with 1.15 service factor
- UL/CSA Certified: Meets stringent electrical safety and performance standards
Technical Specifications
- Overload Relay Type: Type A & B Thermal Overload Relay Heater Element
- Trip Type: Class 20 Standard / Fast Trip
- Motor FLA Range (Ambient): 0.47–0.58 Amps
- Motor FLA Range (Non-Compensated): 0.44–0.47 Amps
- Applicable Starter Sizes: NEMA 0, 1, 2 (Open & Enclosed)
- Series: A200 / B100
- Manufacturer: Eaton Cutler-Hammer
- Catalog Number: FH09
- Part Number: 177C524G09
- Certifications: UL, CSA
- Weight: 1.0 lb
Typical Applications
- Thermal motor overload protection in NEMA magnetic starters (Sizes 0–2)
- Three-phase AC squirrel-cage induction motors rated 0.47–0.58 amps
- Industrial motor control circuits requiring Class 20 trip speed
- OEM equipment and machinery with A200/B100 series motor control panels
- Retrofit and replacement heater elements in existing Cutler-Hammer starter installations
Compatibility & Replacements
Compatible With
- Cutler-Hammer A200 Series Magnetic Motor Starters
- Eaton B100 Series Motor Control Equipment
- Type A and B Thermal Overload Relays
- NEMA Sizes 0, 1, and 2 Enclosed and Open Starters
- Westinghouse Motor Control Equipment (historical compatibility)
Replaces / Drop-In Replacement For
- Cutler-Hammer FH09 (original catalog number)
- Westinghouse FH09 Heater Elements
- Legacy FH-09 and FH 09 variant designations
Works With
- A200 and B100 series motor starters and reduced-voltage starters
- Manual and magnetic motor starter assemblies
- Thermal overload protection systems (non-electronic)
- Standard three-phase AC motor circuits
