High-power tubular & bolt-mount resistors
Tubular and panel-mount bodies for high continuous dissipation
20–150 W · withstanding up to 60 kV
High-power types — bolt-mount lug terminal, 150 W and 100 W tubular, 20 W screw-terminal tube
When the bleeder or load resistor has to dissipate real power continuously, the tubular and bolt-mount housings take over. Vitreous-enamel and resin-coated ceramic tubes are available with screw terminals, metal end caps, or lug terminals for chassis mounting, covering 20 W to 150 W and working voltages into the tens of kilovolts. These are the parts used in capacitor discharge banks, dummy loads, snubbers and high-voltage measurement dividers.
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) |
Notes on ratings
- Ratings shown on the images are examples of stocked values; other resistance and power combinations in the same body are available to order.
- Send the working voltage, continuous dissipation and resistance value and we will confirm the correct body size.
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) | 10 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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