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Series KA/LA

2 to 7.5 Amp / 250 Vrms (40-440 Hz) Thermal Protection, Trip Status

The KA/LA series of solid state relays (SSRs) is designed for use in AC power switching applications where safety and reliability are primary concerns. These SSRs are rated for load voltages up to 250 Vrms from 40 to 440 Hz and are ideal for resistive and reactive loads with power factors as low as 0.2. Inverse parallel SCRs are configured for zero voltage turn on. Optical isolation to 1250 Vrms between the control (input) and load (output) allows the load to be safely controlled by logic circuitry. The KA/LA series is available with thermal protection and thermal TRIP status. In case of a thermal runaway condition, the SSR will shut down the output switch and latch off until the input is reset and the junction temperature returns to a safe level. When the output does latch off, the TRIP status line will yield a logic level output indicating the protection state of the SSR. This feature provides the user with failure mode indication while enhancing the system diagnostic capability. These SSRs are available to the Y screening level of MIL-R-28750 and are packaged in low profile hermetically sealed cases.

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