249 20A 72V

249 Brick Fuse Dimensions(unit: mm) 25A 30A 20A 40A Average Time Current(I-T Curve) Main Characteristics Brick Fuse; Very Fast-acting(VF) Standard UL 248-1 Materials Body: Ceramic End Caps: Copper plated with silver Operating Temperature -55℃ to +125℃ Stock Temperature +10℃ to +60℃ Recommended Pad Layout ： Relative humidity:≤75% yearly average Without dew, maximum 30 days at 95% Vibration Resistance 24 cycles at 15 min. each (60068-6) 10-60Hz at 0.75mm amplitude 60-2000Hz at 10g acceleration Soldering Parameters 260℃.≤10 sec (Wave Soldering) Note: Minimum copper layer thickness = 100um. 350℃.≤3 sec (Hand Soldering) Recommend solder thickness is 0.15mm. Soldering Peak: 260℃. 10 sec. 280℃. 5 sec. (IEC 60068-20) Time vs Current Characteristics: UL 248-1 Rated Current 100% 200% 20A~40A >4h