RSU Metal Oxide Film Resistors Ultra Small Type Features: 1. Ultra high thermal conductivity material, excellent 2. power dissipation in small volume. 3. Flameproof painting, resistance to heat & solvents. 4. Annual shift is low for the strengthened metal oxide film.
RSU Metal Oxide Film Resistors Ultra Small Type
Products | RSU Metal Oxide Film Resistors Ultra Small Type |
Features | 1. Ultra high thermal conductivity material, excellent 2. power dissipation in small volume. 3. Flameproof painting, resistance to heat & solvents. 4. Annual shift is low for the strengthened metal oxide film. |
Electrical And Mechanical Performance of RSU Metal Oxide Film Resistors Ultra Small Type:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J)or±2%(G) | - |
Resistance Temp. Coeff. | ±300 ppm/°C | -55*C ~ 155qC |
Power Rating Load | Surface temp. 235°C Max.ΔR/R≤±1% | Rated voltage for 30 minutes |
Dielectric Withstanding Voltage |
No evidence of mechanical damage or insulation breakdown.
| AC 350V for 1 minutes |
Insulation Resistance | 1.000MΩ | DC100V megger |
Terminal Strength | No evidence of mechanical damage. | 1W： 1 kg 2W&3W:2.5 kg |
Solder-ability | Minimum95%coverage | 235±5°C for 2 seconds |
Resistance to Soldering Heat | No evidence of mechanical damage.△R/R≤±1% | 270±5oCfor10 ±1 seconds 350±10°C for 3.5 ±0.5 seconds |
Environmental Characteristics of RSU Metal Oxide Film Resistors Ultra Small Type:
Characteristics | Standards | Test Methods |
Temp. Cycle | △ R/R≤±1% | -55°C( 30 min.) —► Room Temp.( 3 min.) —►+155°C(30 min.) —► Room Temp.( 3 min.)/( 5 cycles) |
Load Life | △R/R≤±5% | Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours |
Moisture-proof Load Life | △R/R≤±5% | Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH 500 hours |
Nonflammability | not flamed |
16 times of rated wattage for 5 min.
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Dimensions of RSU Metal Oxide Film Resistors Ultra Small Type:
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance (Q) | Max. Working Voltage |
1W | 2.6±0.5 | 6.8 | 28 | 0.6 | 0.22-1 M | 350V |
2W | 3.5 | 9 | 28 | 0.8 | 0.22-1 M | 500V |
3W | 5 | 15 | 28 | 0.8 | 0.22-1 M | 750V |
Derating Curve of RSU Metal Oxide Film Resistors Ultra Small Type:
For resistors operated in ambient temperatures above 70°C ,power rating must be derated in accordance with the curve below.
Surface Temperature Rise of RSU Metal Oxide Film Resistors Ultra Small Type:
