Overview
The Cutler-Hammer M-1640 is a bolt-on mounted, 2-pole circuit breaker rated for 20A at 120/240V. Designed for residential and light commercial applications, this Type BA breaker provides reliable overload and short-circuit protection in electrical distribution panels. The M-1640 is commonly found in older Cutler-Hammer and Eaton panelboards and remains a popular replacement part due to its proven performance and straightforward installation.
Key Features
- 20A trip rating with HACR (Hot/Arc/Cold Resistant) capability for reliable performance across temperature extremes
- 2-pole configuration for 240V branch circuit protection
- Type BA series bolt-on mount compatible with standard Cutler-Hammer panelboards
- 120/240V rated for residential and small commercial electrical systems
- Compact design requires one 1-inch panel space
- Long service life with consistent trip characteristics
Technical Specifications
- Amperage Rating: 20A
- Number of Poles: 2
- Voltage Rating: 120/240 VAC
- Series: BA
- Mounting Style: Bolt-On
- Panel Space Required: 1 inch (single space)
- Interrupting Rating: Typical 10,000 AIC (verify with panel amperage)
- Temperature Rating: HACR rated for -40°C to +60°C operation
- UL/CSA Certification: UL 489, CSA certified
Typical Applications
- Branch circuit protection in residential electrical panels
- Light commercial and small office building distribution systems
- Replacement breaker in existing Cutler-Hammer panelboards
- HVAC and water heater circuit protection
- Kitchen and laundry outlet circuits requiring 20A protection
Compatibility & Replacements
Compatible With
- Cutler-Hammer Type BA panelboards and load centers
- Eaton BR/BA series compatible distribution panels
- 120/240V single-phase electrical service
- Standard residential circuit breaker mounting rails
Replaces / Drop-In Replacement For
- Cutler-Hammer M-1640 (exact model replacement)
- Eaton BA2020 equivalent 20A 2-pole breakers
- Other BA-series 20A 2-pole configurations in the same panel family
Works With
- Cutler-Hammer and Eaton panelboards rated for BA-series breakers
- Standard 120/240V residential and light commercial electrical infrastructure
- Compatible with surge protection and arc-flash protective devices designed for Type BA mounting
- Verify compatibility with your specific panelboard model or system integrator before ordering
