RI80 leaded high-voltage resistors
Axial-leaded ceramic tube, 1 W to 30 W, up to 60 kV
1–30 W · withstanding up to 6–60 kV
RI80 series — ceramic tube construction with axial leads, plain or glass-glaze coated
Round ceramic-tube high-voltage resistors with axial tinned-copper leads, wound on a 96% alumina substrate and coated in glass-glaze resistance film. Available from 1 W to 30 W with withstanding voltages from 6 kV to 60 kV, making them the usual choice for bleeder chains, voltage dividers and capacitor discharge paths in switch-mode supplies, X-ray generators and laser drivers. Resistance values span 1 Ω to 100 GΩ. Standard TCR is 100 PPM; 25 and 50 PPM are available to order.
Materials
| Substrate | 96% Al2O3 alumina ceramic |
| Resistive element | Glass-glaze resistance film |
| Termination / leads | Tinned copper |
| Encapsulation | Resin |
| Operating medium | Air (see notes — rating improves substantially when oil-immersed or resin-potted) |
Encapsulation: organic resin or insulating varnish.
Notes on ratings
- All figures are for operation in air. Standard TCR is 100 PPM — specify 25 PPM or 50 PPM when ordering if required.
- Where both a rated voltage and a maximum working voltage are given, use the lower of the two.
- Pulse peak power must stay below 100× the rated power.
Specification — RI80 leaded
17 body sizes. Values are the manufacturer figures, reproduced in full.
| Type | Rated power | D (mm) | L (mm) | Lead Ø (mm) | Resistance range | Withstanding voltage (VR) | Tolerance | TCR |
|---|---|---|---|---|---|---|---|---|
| RI80-1W | 1 W | 5 | 15 | 0.8 | 1Ω–100G | 6,000 | B F G J K | ±25–100 PPM |
| RI80-1W | 1 W | 5 | 20 | 0.8 | 1Ω–100G | 8,000 | B F G J K | ±25–100 PPM |
| RI80-1W | 1 W | 5 | 22 | 0.8 | 1Ω–100G | 8,000 | B F G J K | ±25–100 PPM |
| RI80-1W | 1 W | 6 | 22 | 0.8 | 1Ω–100G | 8,000 | B F G J K | ±25–100 PPM |
| RI80-2W | 2 W | 8 | 24 | 1.0 | 1Ω–100G | 10,000 | B F G J K | ±25–100 PPM |
| RI80-2W | 2 W | 8 | 26 | 1.0 | 1Ω–100G | 10,000 | B F G J K | ±25–100 PPM |
| RI80-3W | 3 W | 8 | 26 | 1.0 | 1Ω–100G | 10,000 | B F G J K | ±25–100 PPM |
| RI80-3W | 3 W | 8 | 31 | 1.0 | 1Ω–100G | 12,000 | B F G J K | ±25–100 PPM |
| RI80-3W | 3 W | 9 | 30 | 1.0 | 1Ω–100G | 12,000 | B F G J K | ±25–100 PPM |
| RI80-5W | 5 W | 8 | 41 | 1.0 | 1Ω–100G | 15,000 | B F G J K | ±25–100 PPM |
| RI80-5W | 5 W | 9 | 50 | 1.0 | 1Ω–100G | 15,000 | B F G J K | ±25–100 PPM |
| RI80-5W | 5 W | 11 | 41 | 1.0 | 1Ω–100G | 15,000 | B F G J K | ±25–100 PPM |
| RI80-8W | 8 W | 11 | 71 | 1.0 | 1Ω–100G | 20,000 | B F G J K | ±25–100 PPM |
| RI80-10W | 10 W | 11 | 101 | 1.0 | 1Ω–100G | 30,000 | B F G J K | ±25–100 PPM |
| RI80-15W | 15 W | 8 | 126 | 1.0 | 1Ω–100G | 40,000 | B F G J K | ±25–100 PPM |
| RI80-20W | 20 W | 11 | 151 | 1.0 | 1Ω–100G | 50,000 | B F G J K | ±25–100 PPM |
| RI80-30W | 30 W | 8 | 250 | 1.0 | 1Ω–100G | 60,000 | B F G J K | ±25–100 PPM |
Tolerance codes: B = 0.1%, F = 1%, G = 2%, J = 5%, K = 10%.
Performance
Test items, requirements and methods from the manufacturer specification.
| Test item | Performance requirement | Test method |
|---|---|---|
| Solderability | Infiltration area ≥ 95% | Solder bath 235 ± 5 °C, 2 s |
| Terminal strength | ΔR ≤ ±(1%R + 0.05Ω) | 20 N, 30 s |
| Damp heat, steady state | ΔR ≤ ±(5%R + 0.1Ω) | 40 ± 2 °C, 93 ± 3%RH, 1000 h |
| Vibration | ΔR ≤ ±(1%R + 0.05Ω) | 10–500 Hz, 0.75 mm or 98 m/s², 6 h |
| Resistance to soldering heat | ΔR ≤ ±(1%R + 0.05Ω) | 260 ± 5 °C, 10 ± 1 s |
| Fast temperature change | ΔR ≤ ±(1%R + 0.05Ω) | −55 °C 30 min / 125 °C 30 min, 5 cycles |
| Endurance at 70 °C | ΔR ≤ ±(5%R + 0.1Ω) | 70 ± 2 °C, rated power, 1000 h |
| Short time overload | ΔR ≤ ±(1%R + 0.05Ω) | 1.5 VR, 5 s |
Full data sheet reproduced from the manufacturer specification. XYT Electronics supplies these series as an independent distributor; all trademarks are used for identification only.
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