LITTELFUSE INC /DE — Director's Dealing 2012

May 1, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LITTELFUSE INC /DE (LFUS)
CIK: 0000889331
Period of Report: 2012-04-27

Reporting Person: Dickinson Paul M (VP, GM, Semiconductor Products)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-27	Common Stock	A	1980	—	Disposed	12749	Direct
2012-04-29	Common Stocfk	F	189	$63.09	Disposed	12560	Direct
2012-04-30	Common Stock	F	260	$62.67	Disposed	12300	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-27	Stock Option (Right to Buy)	$63.09	A	6600	Acquired	2019-04-27	Common Stock (6600)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$36.33	2015-04-25	Common Stock (1850)	1850	Direct
Stock Option (Right to Buy)	$13.88	2016-04-24	Common Stock (9300)	9300	Direct
Stock Option (Right to Buy)	$42.13	2017-04-30	Common Stock (7100)	7100	Direct
Stock Option (Right to Buy)	$62.21	2018-04-29	Common Stock (6200)	6200	Direct

Footnotes

F1: Value based on the last business day (April 27) before vesting of Restricted Stock Units.

F2: The options vest in increments of one third annually beginning on the first anniversary of the date of grant.