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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | OptiFuse |
| Manufacturer Product Number | RS120-250 |
| Description | PTC Fuse; 2.50 A; 120 VAC/DC |
| Datasheet | Download Datasheet |
The OptiFuse RS120-250 is a 2.5 A hold radial-lead resettable PTC fuse, rated 120 VAC/DC maximum.
A PTC fuse carries its hold current indefinitely; on an overcurrent it heats, its resistance rises sharply and it limits the current to a trickle, then resets on its own once the fault is removed and power is cycled. This one always trips at 5 A, in max. 15.6 s at 5 x IH.
It withstands a fault current of up to 15 A at rated voltage and interrupts up to 135 V. Resistance: minimum 0.05 Ω, 0.13 Ω maximum one hour after tripping. Tripped, it dissipates typically 4.44 W. It operates from -40 to +85 °C.
Construction: outline 22.5 W x 27.5 H x 4.1 T mm (max.); lead spacing 10.2 mm; leads 20 AWG (0.81 mm); tin plated copper.
| Category | |
| Manufacturer | OptiFuse |
| Model | RS120 |
| Hold Current (A) | 2.50 |
| Trip Current (A) | 5.00 |
| Max Voltage | 120 VAC/DC |
| Max Interrupt Voltage | 135 V |
| Max Fault Current (A) | 15.0 |
| Time to Trip | max. 15.6 s at 5 x IH |
| Power Dissipation (W) | 4.44 |
| Min Resistance (Ω) | 0.05 |
| Max Resistance 1 h After Trip (Ω) | 0.13 |
| Mounting Style | Radial Lead (Through-Hole) |
| Size | 22.5 W x 27.5 H x 4.1 T mm (max.) |
| Lead Spacing | 10.2 mm |
| Lead Size | 20 AWG (0.81 mm) |
| Lead Material | Tin plated copper |
| Operating Temperature (°C) | -40 to +85 |