This part is a kind of semiconductor called TVR10241-D.

Function of this product has Metal Oxide Varistor.

Manufacturers : TKS

Image and pinout :

Some of the text within the PDF file :

Metal Oxide Varistor：TVR-D Series Disc Type Varistor for Surge Protection (High Surge Series)  Features RoHS compliant Halogen-free series are available Body size: Ф7mm ~ Ф 20mm Wide operating voltage range: 115Vac ~ 680Vac High surge current rating up to 13KA High energy rating up to 720 Joule Operating temperature range: -40°C ~ +85°C Storage temperature range: -40°C ~ +125°C 8. Agency recognition: UL 1449 3rd/cUL/VDE/CQC 9. TVR10-D, 14-D, and 20-D meet IEC60950-1:2013 Annex Q requirement 10. TVR20-D series for SPD Type 2 is available 1. 2. 3. 4. 5. 6. 7. Note: * of the marking stands for TVR-D series  Recommended Applications 1. 2. 3. 4. 5. 6. 7. 8. Power supply Home appliance Industrial equipment Telecommunication or telephone system Smart meter PLC (Power line communi [ ... ]

TVR10241-D PDF Datasheet Download