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Exhibit 21
AMERICAN POWER CONVERSION CORPORATION
Subsidiaries as of December 31, 2004
| Subsidiary | Place of Incorporation | |||
|---|---|---|---|---|
| APC America, Inc. | Delaware | |||
| APC Sales & Service Corp. | Delaware | |||
| American Power Conversion Holdings Inc. | Delaware | |||
| Systems Enhancement Corporation | Missouri | |||
| A.B.L. Electronics Corporation | Delaware | |||
| APC DC Network Solutions Inc. | Ohio | |||
| American Power Conversion Europe S.A.R.L. | France | |||
| American Power Conversion Corporation (A.P.C.) B.V. | The Netherlands | |||
| APC Distribution Limited | Ireland | |||
| APC (EMEA) Limited | Ireland | |||
| APC Holdings B.V. | The Netherlands | |||
| APC Deutschland GmbH | Germany | |||
| American Power Conversion UK Ltd. | United Kingdom | |||
| American Power Conversion Sweden AB | Sweden | |||
| APC Benelux B.V. | The Netherlands | |||
| APC Australia Pty Limited | Australia | |||
| American Power Conversion Portugal, Ltda. | Portugal | |||
| American Power Conversion Spain S.L. | Spain | |||
| American Power Conversion Italia S.R.L. | Italy | |||
| American Power Conversion France SARL | France | |||
| APC Korea Corporation | Korea | |||
| American Power Conversion Hong Kong Limited | Hong Kong | |||
| American Power Conversion Poland Sp. z.o.o. | Poland | |||
| American Power Conversion (Phils.), Inc. | Philippines | |||
| American Power Conversion Land Holdings Inc. (40%; 60% Filipino nationals) | Philippines | |||
| APC (Suzhou) Uninterrupted Power Supply Co., Ltd. | China | |||
| American Power Conversion Singapore Pte Ltd. | Singapore | |||
| APC International Trade (Shanghai) Co. Ltd. | China | |||
| APC Europe B.V. | Netherlands | |||
| APC (Xiamen) Power Infrastructure Co. Ltd. | China | |||
| American Power Conversion Denmark ApS | Denmark | |||
| Gutor Electronic GmbH | Switzerland | |||
| American Power Conversion Dublin Limited | Ireland | |||
| Silcon (Qingdao) Power Electronics Co. Ltd. | China | |||
| Gutor Electronic Asia Pacific Sdn Bhd | Malaysia | |||
| American Power Conversion Mexico, S.A. de C.V. | Mexico | |||
| American Power Conversion Uruguay S.A. | Uruguay | |||
| APC Japan, Inc. | Japan | |||
| American Power Conversion (India) Private Limited | India | |||
| American Power Conversion Brasil Ltda. | Brazil | |||
| American Power Conversion Holdings (UK) Limited | United Kingdom | |||
| APC DC Network Solutions UK Limited | United Kingdom | |||
AMERICAN POWER CONVERSION CORPORATION Subsidiaries as of December 31, 2004