| < 2011 > |
| Nov. 25. | SPLFA100F,SPLFA150F was added to the SPLFA series. |
| Nov. 21. | LFP300F was added to the PC Board Type. |
| Nov. 18. | TAC-60/-80,TBC-60/-80 was added to the TAC,TBC series. |
| Oct. 07. | CHS model was added to the Power Module type.
|
| Sep. 09. | FTA , FTB model was added to the Noise Filter. |
| Aug. 11. | Announcement of New Board Structure. |
| Aug. 10. | SNDPG / SNDHS series was added to the Unit type. |
| Jul. 22. | PLA series was added to the Unit type. |
| Jun. 20. | SPLFA series was added to the Unit Type. |
| Jun. 15. | Press Releases for PLA series. |
| May. 10. | MMC100A is changed to MMC100B. |
| Mar. 25. | [ The 2nd report ] Regarding effects of a big earthquake on Cosel, Japan. |
| Mar. 15. | Regarding effects of a big earthquake on Cosel, Japan. |
| Mar. 04. | Cosel reports financial data for FY2010(DATA FILE 2010). |
| Mar. 04. | Cosel reports financial data for FY2010(DATA FILE 2010 Semi Annual). |
| Feb. 02. | MMC75A is changed to MMC75B. |
| < 2010 > |
| Dec. 24. | ESC , ESM , ESP model was added to the Noise Filter. |
| Nov. 26. | LFA100F,LFA150F,LFA240F,LFA300F was added to the LFA series. |
| Nov. 19. | CQHS series was added to the Power Module type. |
| Oct. 20. | Cosel has launched new On-Board type, DCDC converter, MGS/MGFS/MGW/MGFW series. |