Product size: 7.4 x 4.8 x 4.5 cm Packing size: 10 x 5 x 5 cm Features: High amperage thermal trip circuit breaker with manual reset switch, suitable for various electrical systems. Ideal for use in harsh environments such as racing vehicles to provide protection against current overload or short circuits. Protective rubber cap helps prevent accidental short circuits. Commonly used in truck, bus, RV, and marine applications, as well as battery and audio systems. Surface mount circuit breakers are typically used in auxiliary and accessory circuits for truck, bus, camper, and marine systems. Sealed waterproof design suitable for engine compartment and bilge areas. Manual trip switch allows for quick circuit disconnection in emergency situations. Connecting bolt size: M6 with two nuts and integral locking ring to prevent loosening due to vibration. Specifications: Circuit rating: 30A, 40A, 50A, 60A, 70A, 80A, 90A, 100A, 120A, 140A, 150A, 200A, 250A, 300A (optional) Voltage rating: 12-48 V Interrupt rating: 3000A @ 30 V Operating temperature: -32C to 82C Storage temperature: -34C to 149C Number of poles: 2 Weather rating: IP67 Certifications: SAE J1627, J1171, UL1500 Color: Black Case material: Thermoplastic, UL 94V-0 rated Mounting hole (stud) size: 6mm / 1/4 inch-28 Product dimensions: 74 x 49 x 44mm / 2.91 x 1.92 x 1.73 inches How to use: 1. Overcurrent protection: When the current reaches the trip threshold, the handle automatically pops up to disconnect the power. In case of short circuit, the breaker trips. After the fault is resolved, press the handle down to reset and restore the circuit. 2. Manual disconnection: To manually cut off power during maintenance or modification, press the red button on the fuse. The handle will pop up to disconnect the circuit. To reconnect, press the handle back to the closed position. Product material: Plastic + metal Package includes: 1 x Circuit Breaker Notes: 1. 1 inch = 2.54 cm 2. Please measure to ensure proper fit. 3. Due to variations in display settings, the actual product color may vary slightly from the image.