ETL Listed 15 to 20 Amp Adapter Plug with Built-In 15A Circuit Breaker | NEMA 5-15P to 5-20R

The Problem Every Homeowner Faces — And the Only Adapter That Solves It Safely

Standard U.S. household outlets are NEMA 5-15R, rated at 15 amps — matched to the 14AWG wiring inside your walls. But many appliances — commercial air conditioners, treadmills, shop vacs, power tools, and commercial kitchen equipment — come with NEMA 5-20P plugs that won’t fit a standard outlet.

Generic 15A-to-20A adapters solve the physical fit problem. But they create a dangerous one: if your device draws more than 15 amps through a 15A circuit, the wiring inside your walls overheats — a leading cause of residential electrical fires. Generic adapters have no protection against this. They simply let the current flow.

The CRST adapter is different.

Built-In 15A Circuit Breaker — The Safety Feature No Other Adapter Offers

Our adapter includes a built-in 15A resettable circuit breaker that automatically cuts power the moment current exceeds 15 amps — protecting your home’s wiring before it can overheat. When the overload clears, reset with a single press. No fuse to replace, no electrician required.

This matters even when your device is rated at 20A: most 20A appliances don’t draw their full rated current during normal operation. This adapter lets you use them safely on a 15A circuit, with automatic protection if the load ever spikes beyond safe limits.

Compact Profile — Won’t Block the Outlet Below

Despite integrating a full circuit breaker, the CRST adapter maintains a compact form factor. When plugged into the top outlet of a standard dual-outlet wall plate, it does not obstruct the bottom outlet — both remain usable simultaneously. A detail that generic bulky adapters consistently get wrong.

NEMA 5-15P → 5-20R — Plug-and-Play, No Wiring Required

Converts any standard NEMA 5-15R household outlet to accept NEMA 5-20P plugs instantly. No tools, no rewiring, no electrician. Designed for temporary use when a 20A outlet isn’t available — the right solution for the right situation.

ETL Listed — UL STD. 498A & CSA STD. C22.2#42

ETL Listed to UL Standard 498A (attachment plugs and receptacles) and CSA Standard C22.2 No. 42 — meeting both U.S. and Canadian safety requirements. Built with high-temperature resistant, flame-retardant materials for long-term reliability under load.

Important Usage Note

This adapter is designed for temporary use only. Ensure your device’s continuous running draw does not exceed 15A / 1,875W. For permanent high-amperage installations, consult a licensed electrician.

18-Month Warranty — Extendable to 36 Months Free

Every CRST product comes with an 18-month warranty as standard. Register your product for free to extend coverage to a full 36 months.

• ✅ Built-in 15A resettable circuit breaker — automatic overload protection
• ✅ NEMA 5-15P to NEMA 5-20R conversion
• ✅ Compact — does not block adjacent outlet on dual-outlet wall plate
• ✅ ETL Listed — UL STD. 498A (US) + CSA STD. C22.2#42 (Canada)
• ✅ Flame-retardant, high-temperature resistant materials
• ✅ Plug-and-play — no tools or wiring required
• ✅ For temporary use; max continuous load 15A / 1,875W
• ✅ 18-month warranty | Extend to 36 months free at crsttech.com

What’s in the Box

• 1× CRST NEMA 5-15P to 5-20R Adapter with Built-In 15A Circuit Breaker