Description
The rating on an adapter or charger label is only a claim, and a load turns that claim into a measurement. The Keysight EL33133A DC electronic load has one input rated to 150 V and 40 A, with 250 W of power available. Also, Lost in HCM lists it for rental and sale, so you can borrow one for a project or buy one for a standing bench.

Ratings at a glance
| Item | Value |
|---|---|
| Inputs | 1 |
| Maximum voltage | 150 V |
| Maximum current | 40 A |
| Maximum power | 250 W |
| Interfaces | LAN and USB |
Four modes, static and transient
The load runs in constant current, constant voltage, constant resistance and constant power modes. It also supports static and transient load profiles, so you can step the current and watch how a supply recovers. Then a built-in data logger shows the behavior over time, with several result views. As a result, you do not need a separate recorder.
Test jobs for the Keysight EL33133A DC electronic load
- AC-DC and DC-DC power supply validation, such as converter bring-up.
- Battery, charger and adapter discharge testing, while the logger records the result.
- LED driver and automotive electronics evaluation.
Protection and remote sensing also help keep these tests repeatable in development and on a production line.
Check the power limit first
The Keysight EL33133A DC electronic load caps power at 250 W, so voltage and current do not combine freely. Because of that limit, you cannot draw 40 A at 150 V. Instead, multiply your voltage by your current and keep the result under 250 W. A 12 V supply at 20 A, for example, needs 240 W. For larger loads, ask Lost in HCM about a bigger model.
Order through Lost in HCM
SMK Vietnam lists this load, while Lost in HCM supplies it. Please request a quote from Lost in HCM with your voltage, current, test mode and delivery site. You can also view more DC electronic loads, read the Keysight website, or contact SMK Vietnam.
EL33133A questions
What is the most power this load can absorb?
It handles 250 W per input, and with one input that is 250 W total.
How do I connect it to a computer?
It has LAN and USB interfaces, so either one can link it to a PC.
Can it discharge a battery?
Yes. Battery, charger and adapter discharge testing is a listed use, and constant current mode suits it well.
















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