EXHIBIT 21.1

SUBSIDIARIES

Cole Hersee Company – Delaware

Cole Hersee S. de R.L. de C.V. – Mexico

Concord Semiconductor (Wuxi) Company – China

Dongguan Littelfuse Electronics Co., Ltd. – China

H.I. Verwaltungs GmbH – Germany

LF Consorcio S. De R.L. de C.V. – Mexico

LF Europe GmbH – Germany

Littelfuse Concord Semiconductor, Inc. – Taiwan

Littelfuse da Amazonia, Ltda. – Brazil

Littelfuse Holding, B.V. – Netherlands

Littelfuse Far East Pte. Ltd. – Singapore

Littelfuse GmbH – Germany

Littelfuse HK Limited – Hong Kong

Littelfuse Holding GmbH – Germany

Littelfuse Ireland Development Co., Ltd. – Ireland

Littelfuse Ireland Holding Ltd. – Ireland

Littelfuse Ireland Limited – Ireland

Littelfuse KK – Japan

Littelfuse Phils, Inc. – Philippines

Littelfuse Triad, Inc. – Korea

Littelfuse U.K. Ltd. – United Kingdom

Littelfuse, B.V. – Netherlands

Littelfuse, S.A. de C.V. – Mexico

Selco AS - Denmark

Startco Engineering Ltd. - Canada

Suzhou Littelfuse OVS Ltd. – China

Wickmann-Werke GmbH – Germany