NA240 Product Details & Specifications

• Item Name: NA240
• Manufacturer: Federal Pacific-American
• Packaged Weight: 4 lb
• Type: NA
• Amperage: 40
• Poles: 2
• Voltage: 240

Description:

The NA240 is a two-pole, 40-amp thermal-magnetic circuit breaker used to protect 120/240-volt branch circuits in compatible Stab-Lok load centers. Common applications include electric water heaters, baseboard heaters, air-conditioning equipment, small ranges, and other single-phase 240-volt loads that require a 40-amp circuit.

Suppliers list NA240 as discontinued, with both commercialization and standard service ending on October 1, 2021. Original breakers are now obtained mainly as used, reconditioned, surplus, or new-old-stock parts..

Key identifiers:

• Family: Stab-Lok
• Type: Thermal-magnetic 
• Current rating: 40 amps
• Voltage rating: 120/240V AC
• Poles: 2
• Phase: Single-phase
• Interrupting rating: 10,000 amps
• Trip functions: Long-time and instantaneous
• Mounting: Plug-in
• Terminal type: Screw connector
• Conductor range: 14 to 2 AWG 
• Approximate breaker weight: 0.37 to 0.50 lb (0.17 to 0.23 kg)

Compatibility: Platform-Specific. The NA240 is intended for Federal Pioneer Stab-Lok load centers whose equipment labels specify Type NA breakers. It shouldn’t be confused with the thinner Type NC0240. Don’t assume compatibility with Federal Pacific or American-branded panels based only on the Stab-Lok contact shape. Confirm the panel label, breaker format, bus connection, voltage, and required interrupting rating before installation.