The HIITIO HQ140 GFCI (Ground Fault Circuit Interrupter) delivers reliable 5mA personnel protection for residential and light commercial applications. Designed as a 1″ plug-in (snap-on) breaker, it meets UL 489 (molded-case circuit breakers) and UL 943 (ground-fault circuit interrupters) standards.
It protects against ground faults that can cause electric shock, making it ideal for locations required by the 2023 National Electrical Code (NEC) in dwelling units. The breaker features a clear visual trip indicator, test button for monthly verification, and options for long (T) or short (S) pigtails.
Key benefits include high interrupting capacity (10kA), robust electrical life (6,000 cycles), and easy installation into compatible load centers. Not bidirectional — follow terminal markings carefully. Suitable for both new construction and retrofit projects where equipment is updated or replaced.
| Parameter | Value |
|---|---|
| Rated Current (In) | 15A, 20A, 25A, 30A, 40A |
| Rated Voltage (Ue) | 120V |
| Poles | 1P |
| Rated Frequency | 60 Hz |
| Rated Residual Operating Current (IΔn) | 5 mA |
| Rated Breaking Capacity (Icn) | 10 kA |
| Rated Residual Making & Breaking Capacity (IΔm) | 3000 A |
| Trip Curve | 10–20 In |
| RCD Type | AC |
| Model Style | Snap-on / Plug-in |
| Pigtail Options | T: Long / S: Short |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Surge Current Resistance (8/20 μs) | 3 kA |
| Electrical Life | 6,000 operations |
| Mechanical Life | 10,000 operations |
| Protection Degree | IP20 |
| Ambient Operating Temperature | -25°C to +40°C |
| Storage Temperature | -25°C to +70°C |
| Weight | Approx. 190 g |
| Output Connection | AWG 14–10 (Cu/Al), 20 lb-in torque |
| Bidirectional | No (follow markings) |
| Standards | UL 489, UL 943 |
HIITIO® was established in 2018 as a result of Hecheng Electric introducing a mature R&D team. HIITIO specializes in producing high-voltage DC electrical devices for EV, solar energy systems, and energy storage applications.
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