This datasheet provides specifications, features, and ordering options for the Sensata 7851 and 7854 series 15 to 30 amp precision thermal circuit breakers.
The 7851 and 7854 series thermal circuit breakers are compact, lightweight, closed construction devices designed to protect wiring and meet harsh environmental requirements. They feature weatherproof sealed assemblies available in manual and automatic reset options, suitable for applications in construction, off-road equipment, marine, RVs, mining, agricultural equipment, and electric vehicles.
| Voltage Rating | 30VDC or 120VAC |
|---|---|
| Current Rating | 12.5 to 60 Amps |
| Weight (7851) | 54 grams max |
| Weight (7854) | 49 grams max |
| Calibration Temperature | 77°F (25°C) |
| Trip Time Range | 5 to 55 seconds |
| Trip-Free Protection | Yes |
They are used for protection of wire cable of accessory circuits, equipment and battery protection in construction and off-road equipment, marine, recreational vehicles (RV's), mining, agricultural equipment and electric (hybrid) vehicles.
Yes, the 7851 and 7854 series closed construction circuit breakers are weatherproof sealed for protection against moisture, dust, grease, fuel vapors and other harsh environments.
The breakers combine trip-free protection with fast response time to interrupt short circuits or overloads.