The ISL73096RH, ISL73127RH and ISL73128RH are radiation hardened bipolar transistor arrays. The ISL73096RH consists of three NPN transistors and two PNP transistors on a common substrate. The ISL73127RH consists of five NPN transistors on a common substrate. The ISL73128RH consists of five PNP transistors on a common substrate. One of our bonded wafer, dielectrically isolated fabrication processes provides an immunity to Single Event Latch-up and the capability of highly reliable performance in any radiation environment.