High Power General Purpose Load Resistor (Box Type)

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last updated：Feb 19, 2026

エルコム

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This is a versatile load resistance box that is ideal for dummy loads of various power supplies, UPS, and battery discharge testing!

This is a high-power cement resistor unit with a compact box design, equipped with multiple EL/EK type resistors featuring ultra-strong three-directional heat dissipation fins (aluminum housing). It is available in two rated types: 2kW and 4kW, and you can also specify options for built-in thermostats or temperature fuses.

Related Link - https://elcom-cr.com/product/unit/

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basic information

**Features** - Customization is possible as much as possible. - Resistance values can be accommodated according to customer specifications (Ω). - Resistor wiring can be configured in series or parallel. - Protective functions (thermistors or thermal fuses) can be built into the resistors. - Additional air cooling fan (with finger guard). - The fan is sized at 119mm (thickness 25mm) and supports various voltages. - It demonstrates its effectiveness when dealing with unexpectedly high temperatures or when pushing the rated limits. - BOX structure ensures no direct contact with the resistor, eliminating concerns about burns (safety). - Significantly lower price compared to electronic load devices! - Short lead time (standard production period: approximately 3 weeks).

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Applications/Examples of results

- Discharge test loads for batteries (Li-ion, NiMH, lead-acid, etc.) - Dummy loads for DC power supplies (SW power supplies, etc.), inverters, UPS, etc. - Durability tests and reliability tests for electronic components (relays, switches, capacitors, etc.) *There is a proven track record of use for dummy loads for power supplies and UPS.