Anti-Surge Wire Wound Fast-Fuse MELF Resistors

Surge-Protected Wound Fast-Fusing Resistor Adopting an SMD-supported structure, it has a rated power of 1W to 4W and a resistance range of 1 ohm to 470 ohms. The enhanced welding points between the alloy wire and metal cap provide reliable protection against surges. It complies with RoHS/REACH standards.

The Surge-Protected Wound Fast-Fuse MELF (Metal Electrode Leadless Face) resistor boasts a reinforced mechanical structure capable of enduring vibrations and thermal shocks, designed to serve as a fast-fuse device for high-power applications. Indeed, it excels in heat dissipation and surge resistance, surpassing chip resistors in these aspects. To further enhance reliability, the resistor employs advanced surge protection and rapid fuse-opening structures; the embedded thermal fuse safeguards circuits from overheating in electronic products. It features a flame-retardant multilayer coating equivalent to UL 94 V-0 and meets the safety and fusing tests specified in UL 1412.

Power Rating (at 70°C)	Maximum Working Voltage*	Maximum Overload Voltage**	Maximum Permissible Surge Voltage	Minimum Resistance	Maximum Resistance	Resistance Tolerance	Available Resistance Values
1W			7.5 kV	1 Ω	470 Ω	±5%	E-24
2W			8.5 kV	1 Ω	470 Ω	±5%	E-24
3W			9 kV	1 Ω	470 Ω	±5%	E-24
4W			11 kV	1 Ω	470 Ω	±5%	E-24

• Rated Continuous Maximum Working Voltage (RCWV) should be determined from RCWV = √(Power Rating x Resistance Values)
  ** Short - time Overload (STOL) test should be determined from STOL = 2.5 x RCWV

• Not applicable to all resistance values. Please check with us regarding the PPM of specific resistance value(s).
  

• * Recommended to install a fuse holder if fusing function is required.