The HSC-AT11CS-A03 from HIROSE ELECTRIC CO., LTD. is a Fiber Optic Attenuator with Attenuation 3 dB Min., Operating Temperature -40 to 75 Degree C, Optical Power w 250, Return Loss 60 dB Min., Storage Temperature 1550. More details for HSC-AT11CS-A03 can be seen below.