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HOLIDAY ALERT
UPS will not be operating today in observance of Martin Luther King, Jr. Day. If your order is in stock and you prefer that it ship immediately, please choose a FedEx option at checkout.
Weather Closure Alert
Due to severe weather, our White House, Tennesee location will be closed Wednesday the 19th.
All shipments from this location will resume on Thursday the 20th. Thank you for your patience!
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Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Sierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required.
Learn More
Surface Mount Circuit Breaker - 30A | Sierra CB50530SIERRA-CB50530Qty In Stock: 20Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker - 150A | Sierra CB50590SIERRA-CB50590Qty In Stock: 28Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker - 40A | Sierra CB50540SIERRA-CB50540Qty In Stock: 0Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker - 100A | Sierra CB50570SIERRA-CB50570Qty In Stock: 0Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker, 135 amp | Sierra CB50580SIERRA-CB50580Qty In Stock: 0Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker - 80A | Sierra CB50560SIERRA-CB50560Qty In Stock: 0Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker, 25 amp | Sierra CB50520SIERRA-CB50520Qty In Stock: 2Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More
Surface Mount Circuit Breaker, 50 amp | Sierra CB50550SIERRA-CB50550Qty In Stock: 22Brand: SierraSierra's thermal circuit breakers provide medium duty circuit protection for 25 to 200 Amp loads. These breakers are extremely useful when switching, circuit protection, ignition proctection are all required. Learn More© 2025 Marine Parts Source. All Rights Reserved.