RT Metal Glaze High Voltage Resistors Features: 1. Similar characteristic with metal film but resistance 2. value can be as high as 33MΩ. 3. Metal-glaze elements provide high stable performance 4. against environmental conditions and overload. 5. Resistant to heat, humidity & solvents.
RT Metal Glaze High Voltage Resistors
Products | RT Metal Glaze High Voltage Resistors |
Features | 1. Similar characteristic with metal film but resistance 2. value can be as high as 33MΩ. 3. Metal-glaze elements provide high stable performance 4. against environmental conditions and overload. 5. Resistant to heat, humidity & solvents. 6. Resistance tolerance±5% & ±1%. 7. UL1676 approved RT 1/2W, RT 1W & 2W series(960KΩ~12MΩ). 8. VDE approved RT 1/4W, RT 1/2W, RT 2W series(100KΩ~10MΩ). |
Electrical And Mechanical Performance of RT Metal Glaze High Voltage Resistors:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J)or ±1%(F) |
- |
Resistance Temp. Coeff. | ±200 ppm/°C | -65°C ~ 175°C |
Power Rating Load | Surface temp. 175°C Max.△R/R≤±1% | Rated voltage for 30 minutes |
Short Time Overload | ±1% | 2.5 times of rated valtage for 5 seconds.
|
Dielectric Withstanding Voltage |
No evidence of mechanical damage or insulation breakdown.
| AC 350V for 1 minutes |
Insulation Resistance | 1.000MΩ | DC 100 V megger |
Pulse Loading Capability | △R/R≤±2% | IEC 60065 14.1 |
Terminal Strength | No evidence of mechanical damage. | <1/2W:1 kg > 1W:2 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°Cfor 10 ±1 seconds 350±10°C for 3.5 ±0.5 seconds |
Environmental Characteristics of RT Metal Glaze High Voltage Resistors:
Characteristics | Standards | Test Methods |
Temp. Cycle | △ R/R≤±0.5% | -55°C( 30 min.) —► Room Temp.( 3 min.) —►+175°C(30 min.) —► Room Temp.( 3 min.)/( 5 cycles) |
Load Life | △R/R≤±3% | Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours |
Moisture-proof Load Life | △R/R≤±3% | 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. ( RT 1W & RT 2W ) |
Dimensions of RT Metal Glaze High Voltage Resistors:
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance (0) | Max. Permissible Voltage | |
DC | RMS | ||||||
1/4W | 2.4±0.5 | 6.4 | 28 | 0.6 | 47K〜33M | 1600V | 1150V |
1/2W | 3.5 | 9 | 28 | 0.65 | 47K〜33M | 3500V | 2500V |
1W | 4.5 | 11 | 28 | 0.8 | 47K〜33M | 5000V | 3500V |
2W | 5.0 | 15 | 28 | 0.8 | 47K〜33M | 10000V | 7000V |
Derating Curve of RT Metal Glaze High Voltage Resistors:
For resistors operated in ambient temperatures above 70℃,power rating must be derated in accordance with the curve below.
Surface Temperature Rise of RT Metal Glaze High Voltage Resistors:
