This part is a kind of semiconductor called 1F7.
Function of this product has 1.0 Amp Fast Recovery Plastic Rectifier 50 to 1000 Volts.
Manufacturers : Micro Commercial Components
Image and pinout :

Some of the text within the PDF file :
MCC • • • • • omponents 21201 Itasca Street Chatsworth !"# $ % !"# 1F1 THRU 1F7 1.0 Amp Fast Recovery Plastic Rectifier 50 to 1000 Volts R-1 Features High Current Capability Low Leakage Fast Switching for High Efficiency 1.0 Ampere operation at TA=55oC with no thermal runaway Exceeds Environmental standards of MIL-S-19500/228 Maximum Ratings • • • • Operating Temperature: -55°C to +150 °C Storage Temperature: -55°C to +150 °C For capacitive load. Derate current by 20% Typical Thermal Resistance: 67oC/W Junction to Ambient. Maximum Recurrent Peak Reverse Voltage 50V 100V 200V 400V 600V 800V 1000V Maximum RMS Voltage 35V 70V 140V 280V 420V 560V 700V Maximum DC Blocking Voltage D MCC Part Number 1F1 1F2 [ ... ]
1F7 PDF Datasheet Download
