IR’s RAD-Hard™ solid state relays (SSRs) for high reliability (hi-rel) applications are radiation–hardened and hermetically sealed devices designed to improve reliability by replacing electro-mechanical relays in power bus switching, heater control circuits, battery charging and other hi-rel applications.

These SSRs are characterized for total dose levels of up to 100k rad (Si) or higher, and single event effects (SEE) immunity up to an linear energy transfer (LET) of 37 MeV/(mg.cm2) or higher. Isolation is 1000V I/O. Class "P" (Unscreened), "H" and "K" screening is available, see data sheet. International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.

These devices are available in single, dual or octal SPST NO (single pole, single throw, normally open [Form A]) type with current ratings of 1.5A to 20A at 60V to 100V in alternate style packages for flange mounting. Consult the factory for information on possible alternate packaging styles.

In addition, some of the new relays have internal circuitry to control output transition times for lower dV/dt and dI/dt, minimizing system RFI/EMI, an important feature in today's compact systems.

Part Number	Package	Current Rating	Contact Configuration	Input Type	EMI/RFI Control
RDHA710SE10A2Q	8-pin SMD	10 A	Dual SPST Normally Open	5V LogicBuffer	Controlled Transition Times
RDHA701FP10A8Q	64-pin SMD	1.5 A	Eight SPST Normally Open	5V LogicBuffer	Controlled Transition Times
RDHA701FP10A8C	64-pin SMD	1.5 A	Eight SPST Normally Open	No Buffer	Intermediate Transition Times
RDHA720SF06A1N	5-pin SMD	20 A	Single SPST Normally Open	No Buffer	Fast Transition Times