The Square D K-1266 40 Amp 600 Vac 3 Pole Circuit Breaker is a high-quality electrical component designed for commercial and industrial applications. This thermal circuit breaker, with a maximum amperage of 40A and voltage rating of 551-600V, features a Type A tripping characteristic for reliable protection. With a durable ABS/plastic construction and box lugs for electrical connections, this main breaker from Square D is a reliable choice for branch circuit systems in the United States. If you have any questions please ask. Thanks
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