RN Precision Metal Film Resistors Features: 1. Low T.C. 25ppm 50ppm 100ppm. 2. High precision:± 0.25%、± 0.5%、± 1%、± 5%. 3. Temperature stable, low noise, good reliability. 4. 0.1% / 25ppm case by case.
RN Precision Metal Film Resistors
Products | RN Precision Metal Film Resistors |
Features | 1. Low T.C. 25ppm 50ppm 100ppm. 2. High precision:± 0.25%、± 0.5%、± 1%、± 5%. 3. Temperature stable, low noise, good reliability. 4. 0.1% / 25ppm case by case. |
Electrical And Mechanical Performance of RN Precision Metal Film Resistors:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±1%(F)or ±0.5%(D) | - |
Resistance Temp. Coeff. | ±25ppm/°C、±50ppm/°C、 ±1。6ppm/°C、 | -65°C ~ 175°C |
Power Rating Load | Surface temp, 175°C Max.△R/R≤±1% | Rated voltage for 30 minutes |
Short Time Overload | ±0.5% | 2.5 times of rated valtage for 5 seconds.
|
Dielectric Withstanding Voltage | No evidence of mechanical damage or insulation breakdown.
| Max. Overload Voltage for 1 min.(RN1W& 1WL： AC 350V: RN 1/4 WS:AC 300V ) |
Insulation Resistance | 10,000MΩ | DC 100V or 500V megger |
Terminal Strength | No evidence of mechanical damage. | 1 kg |
Solder-ability | Minimum95%coverage | 235±5°C for 2 seconds |
Resistance to Soldering Heat | No evidence of mechanical damage.△R/R≤ ± 1 % | 270±5°C for 10 ±1 seconds 350±10°C for 3.5 ±0.5 seconds |
Environmental Characteristics of RN Precision Metal Film Resistors:
Characteristics | Standards | Test Methods |
Temp. Cycle | △ R/R≤±0.25% | -65°C( 30 min.) —► Room Temp.( 3 min.) —►+175°C(30 min.) —► Room Temp.( 3 min.)/( 5 cycles) |
Load Life | △R/R≤±2% | Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours |
Moisture-proof Load Life | △R/R≤±1.5% | Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH1000 hours |
Nonflammability | not flamed | 16 times of rated wattage for 5 min. (RN 1W & RN 1WL). |
Dimensions of RN Precision Metal Film Resistors：
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance Range(Ω) | Max. Working Voltage |
1/8W | 1.7±0.2 | 3.7max. | 28 | 0.45 | 10-1M | 150V |
1/4WS | 1.7±0.2 | 3.7max. | 28 | 0.45 | 10-1M | 200V |
1/4W | 2.4±0.5 | 6.4 | 28 | 0.6 | 10-2M | 250V |
1/2WS | 2.4±0.5 | 6.4 | 28 | 0.6 | 10-2M | 300V |
0.6W | 2.4±0.5 | 6.4 | 28 | 0.6 | 10-2M | 350V |
1/2W | 3.5 | 9 | 28 | 0.65 | 10-2M | 350V |
1W | 4.5 | 11 | 28 | 0.8 | 10~2M | 500V |
1WL | 5.0 | 15 | 28 | 0.8 | 10~2M | 500V |
Derating Curve of RN Precision Metal Film Resistors:
For resistors operated in ambient temperatures above 70°C ,power rating must be derated in accordance with the curve below.
Surface Temperature Riseo of RN Precision Metal Film Resistors：
