Upgrade Your Safety with Newly Manufactured Protection Don't compromise your home's electrical safety with used or refurbished parts. The N-HTB Z0250 is a brand-new replacement circuit breaker specifically engineered for Federal Pacific Electric (FPE) Stab-Lok load centers. Designed to replace the vintage Zinsco RC3850 model, this breaker combines perfect fitment with modern safety standards. Why Choose N-HTB Replacement Breakers? Newly Manufactured, Not Old Stock: Unlike many "New Old Stock" (NOS) items sold online that have been sitting on shelves for decades, our breakers are freshly manufactured. You get brand-new internal components that perform reliably when you need them most. Certified for Safety: Your safety is our priority. This breaker is ETL Listed and conforms to UL Standard 489 for Molded Case Circuit Breakers (USA & Canada). It has been rigorously tested to handle modern electrical loads. Direct Fit & Easy Install: Designed as a precise replacement for the Zinsco RC3850 Thin Series (1/2" per pole). It features the classic Stab-Lok plug-in connection for a secure grip on the bus bar. Technical Specifications: - Model: N-HTB Z0250 (Replaces Zinsco RC3850) - Amperage: 50 Amp - Poles: 2-Pole - Voltage: 120/240 VAC - Interrupting Rating: 10,000 AIC - Terminal Type: Stab-Lok (Plug-In) - Condition: Brand New (Non-Refurbished) - Certifications: Intertek ETL Listed to UL 489 Standard Worry-Free Guarantee: We believe in the quality of our products. That's why every N-HTB breaker is backed by a supportive 10-Year Warranty. Replace your aging breakers with confidence today.