Compact, Self-Cooled RF load with Built-In Protection

Self-Contained
25 kW Series RF Load

The 8640B Series RF loads are compact, high-power solutions engineered to dissipate up to 25 kW of continuous RF energy across a broad frequency range up to 1 GHz. Designed for transmitter sites where space is limited, the low-profile footprint and self-contained design simplify integration into crowded systems.

Each unit features forced-air cooling paired with a built-in interlock control circuit to ensure safe shutdown in the event of blower or coolant pump failure—protecting both the load and the transmitter.

Available in multiple voltage configurations:

115 V @ 60 Hz (-115)
230 V @ 50 Hz (-230)
230 V @ 60 Hz (-230-6)

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Why Choose 8640B Series?

High Power Handling

Delivers up to 25 kW continuous RF dissipation across DC to 1 GHz—ideal for demanding transmitter loads and long operating periods.

Fail-Safe Protection

Integrated interlock circuit ensures the load safely disconnects if blower or coolant pump power is lost, protecting connected equipment.

Compact, Site-Ready Design

Low-profile, space-saving footprint is optimized for crowded transmitter facilities and high-density RF environments.

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Model Number

8645B115 request_button