Using a bimetal, snap acting disc as the sensing and actuating element, the Klixon® 7855 series thermal circuit breaker provides trouble free over current protection for high current applications.

The 7855 Series is available in two configurations:
• 7855-6: Sealed construction, manual reset
• 7855-7: Sealed construction, automatic reset

Applications
• Main harness protection for heavy trucks, buses, construction equipment, off–road vehicles, and RV's
• Electric vehicle battery protection

General Envelope Dimensions
Nominal dimensions provided for reference only.

Trip Curve
Approximate Time — Current Characteristics at 77°F (25°C)

Solid Lines: 7855-6 and 7855-7

Derating Curve
Approximate Effect of Ambient Temperature on Ultimate Trip

 Performance characteristics are based on room temperature (77°F). Consult derating curve at left for ambient temperatures significantly higher or lower than standard room temperature.

Example: At 77°F the device is calibrated to hold at 110% of rated current (1) and trip at 138% of rated current (2). At 140°F, the same device will hold at approximately 92% of rated current (3), and trip at approximately 120% of rated current (4).