MELF Resistor Features: 1.Low temperature coefficient, high precision, good high frequency performance. 2.Operating ambient temperature: -55~+155 3.Film the metal in Vacuum, the surface coats blue resin with the good waterproof. 4. Resistance range: ±0.1%、±0.25%、±1%、±5%.
MELF Resistor
Products | MELF Resistor | ||||||||
Features | 1.Low temperature coefficient, high precision, good high frequency performance. 2.Operating ambient temperature: -55~+155 3.Film the metal in Vacuum, the surface coats blue resin with the good waterproof. | ||||||||
| Type | Power | Resistance range | (mm)Dimensions | Max.working voltage | Max.insulation voltage | |||
L±0.5 | D±0.2 | ||||||||
MEF020414 | 0204 | 1/4W | 1R~10M | 3.5 | 1.3 | 250V | 300V | ||
MEF020412 | 0204 | 1/2W | 1R~10M | 3.5 | 1.3 | 250V | 500V | ||
MEF020712 | 0207 | 1/2W | 1R~10M | 5.7 | 2.1 | 300V | 600V | ||
MEF02071S | 0207 | 1W | 1R~10M | 6.0 | 2.1 | 350V | 700V | ||
MEF04112S | 0411 | 2W | 1R~10M | 8.7 | 3.1 | 400V | 800V | ||
Test item | Test condition | Performance | |||||||
Temperature coefficient | Test the resistance value at normal temperature and normal temperature added 100°C,calculate per °C resistance value change rate. |
±5 ~50ppm/°C | |||||||
Short time overload | 2.5 x rated voltage or max.overload voltage(get the lower) for 5 seconds. |
ΔR≤±(0.5%R0+0.05Ω) | |||||||
Pulse overload | At 4 x rated voltage or Max. Pulse overload voltage(get the lower)cycle 10000±200 times (1 second on,25 seconds off). |
ΔR≤±(1% R0+0.05Ω) | |||||||
Resistance to solderling heat | Immerge into the 350±10°C tin stove for 2~3seconds. |
ΔR≤±(0.5%R0+0.05Ω) | |||||||
Solderability | Immerge into the 245±3°C tin stove for 2~3seconds. | The solderling area is over 95%. | |||||||
Temperature cycling | At -55°C for 30min,then at +25°C for 10-15min,then at +155°C for 30min,then at +25°C for 10-15min,total 5cycles. |
ΔR≤±(0.5%R0+0.05Ω) | |||||||
Load life in humidity | Overload rated voltage or Max.working voltage(get the lower )for 1000 hours(1.5hours on and half-hour off)at the 40±2°C and 90~95% relative humidity. |
ΔR≤ ±(2% R0+0.05Ω) |
Construction Drawing of MELF Resistor:
Rated Power Derating Curve of MELF Resistor: