International Rectifier

Annual Meeting of Stockholders

November 6, 2012

Statement of Caution Under the Private Securities Litigation Reform Act of 1995

This Investor Presentation contains “forward-looking statements” within the meaning of the Private Securities

Litigation Reform Act of 1995. These statements relate to expectations concerning matters that (a) are not

historical facts, (b) predict or forecast future events or results, or (c) embody assumptions that may prove to have

been inaccurate. These forward-looking statements involve risks, uncertainties and assumptions. When we use

words such as “believe,” “expect,” “anticipate” or similar expressions, we are making forward-looking statements.

Although we believe that the expectations reflected in such forward-looking statements are reasonable, we cannot

give readers any assurance that such expectations will prove correct. The actual results may differ materially from

those anticipated in the forward-looking statements as a result of numerous factors, many of which are beyond our

control. Important factors that could cause actual results to differ materially from our expectations include, but are

not limited to, the factors discussed in the sections entitled “Risk Factors” and entitled “Critical Accounting Policies

and Estimates” within “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in

our filings with the Securities and Exchange Commission, including our most recent reports on Form 10-K and 10-

Q. All forward-looking statements attributable to the Company are expressly qualified in their entirety by the factors

that may cause actual results to differ materially from anticipated results. Readers are cautioned not to place

undue reliance on these forward-looking statements, which reflect our opinion only as of the date hereof. We

undertake no duty or obligation to revise these forward-looking statements. Readers should carefully review the

risk factors described in this document as well as in other documents we file from time to time with the Securities

and Exchange Commission.

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Our Strategy

1. Leadership in core Power Management technologies

• Benchmark LV- and MV-MOSFET and IGBT process technology

• Digital Power Management

– CHiL controllers + benchmark LV MOSFETs

• Benchmark industrial IGBTs for Variable Speed Motion

• Automotive grade IGBTs for H(EV) drive train technology

• GaN-on-Si – disruptive power switching technology

2. Efficient and flexible manufacturing and supply chain

• Front-end model moving to 50% wafers sourced externally

• Back-end model moving to 70% sourced externally

3. Strategic alignment and partnership with Tier 1 OEMs, ODMs, and Distributors

3

Revolutionary

GaN Technology

Technologies Driving Our Future Growth

Low and mid voltage MOSFETS

Industrial

Consumer & Computing

Power Supplies

• Higher efficiency

• Smaller footprint

• Lower system cost

• Strong IP portfolio

• Engagements with tier

one customers for early

adoption

High Voltage IGBTs and ICs

Motion Control

Appliances

Industrial

Power Modules for

Appliance and Industrial

Digital Power Control

Servers

High Performance Computing

Digital Controllers

Automotive IGBTs

COOliRIGBT™

COOliR2Bridge

™

4

IR LV- and MV- MOSFET Market Leadership

Discrete Standard MOSFET Supplier Market Share Estimates

2011 Rank

Manufacturer

1 International Rectifier 2 Infineon 3 Toshiba 4 Fairchild 5 STMicroelectronics 6 Vishay 7 Renesas 8 Alpha & Omega Semiconductor =9 Fuji Electric =9 ON Semiconductor

Source: IMS Research Jul-12

Top 10 Suppliers of Power MOSFETs, 2011

2011 Company

Rank

1 International Rectifier 2 Toshiba 3 Infineon Technologies 4 Fairchild Semiconductor 5 Renesas Technology 6 Vishay Intertechnology 7 STMicroelectronics 8 On Semiconductor 9 Alpha & Omega

10 NXP

Source: IHS iSuppli August 2012

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IR Digital Power Strategy: Complete End-to-End DC-DC Solution

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Industry’s Leading Digital Power (CHiL) Controllers

+ Benchmark Performance MOSFETs/PowIRstages

Initial Target Market – Powering Processors

• Solutions for Graphics

processors (GPU) from

ATI (AMD) and Nvidia.

• Solutions for leading

Server and Desktop

CPU’s from Intel, AMD

Digital Communication • Real time monitoring of

currents, voltages and faults

• Configuration of controllers to

meet system requirements

• Communication between the

system/CPUs and the power

management chips

Digital Control

• Cost effective

• Easy to design and use

• IR has the lowest quiescent

power on par with Analog

Controllers

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Rapid Adoption of Digital Power Management in Last Two Years

Graphics Cards:

addressable content

about $8

High Performance

Desktops: addressable

content about $8

High Performance

Computing: addressable

content about $1-$2/ board

Servers: up to $40-$50 of

addressable content Communications: up

to $10 of addressable

content

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Variable Speed Motion Strategy: Digital Power Control, Best-in-

Class IGBTs, and Integrated Intelligent Power Modules

Innovative technologies delivering superior system performance

• Digital Control, IGBTs, IRAM and uIPM modules

Industry-leading products to provide “System in Package” highly integrated solutions, improved

system performance and ease of design

Partnership with established Tier 1 players and aggressive targeting of emerging high growth players

in emerging markets.

Digital and

High Voltage ICs

IGBTs Intelligent Power

Module

(IRAM & MCM)

uIPM

9

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Power Modules – New Competitive Benchmark

600V

3-Phase

Driver

HVIC

VCC

HIN1

HIN2

HIN3

LIN1LIN2

LIN3

FAULT

ITRIPEN

VB1 VB2 VB3

V+

VSS

U, VS1

V, VS2

W, VS3

RCIN

V-

COM

The Advantage

• Simpler

• Smaller

• No Heat Sink

• Lower Cost

600V

3-Phase

Driver

HVIC

VCC

HIN1

HIN2

HIN3

LIN1LIN2

LIN3

FAULT

ITRIPEN

VB1 VB2 VB3

V+

VSS

U, VS1

V, VS2

W, VS3

RCIN

V-

COM

Micro Inverter for Solar Conversion

Motor Drive variable speed applications

for light loads 20W-250W for example in:

Pumps

Compressors

Fans

Existing system:

91 component count IR’s new system:

31 component count

: Enabling Smaller Size and Lower Cost

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Automotive Grade High Power COOLiR2 Platform

Optimized for (H)EV Drive Train Applications

…..300V 600V ……..1200V

Wire-bond-less

module

manufacturers COOLiR2DIETM

AU-Bare Die

COOLiR2BridgeTM

COOLiR2ModTM

COOLiR2DriveTM System Integrators

Advanced module

manufacturers with

Si-capabilities

Increasing Integration Level

Target Market Subcontractor&

Development

Partner

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Disruptive GaN Technology to Revolutionize Power

Management

PFC Power Supplies

*Source: Yole Power GaN Report: November 2010

Power Management Power Switching

Industry

Consumer Electronics and Computing

DC/AC

Inverter

DC/DC

Converter

EV/HEV

Inverter

PV Inverter Motor Control UPS

IT & Consumer Automotive

Possible

Applications*

30V 600V 1200V

GaN Power Electronics

Voltage regulator ICs / Drivers

Discrete transistor & diode Discrete Power transistor & diode / power modules / IPM

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Prioritize HV GaN Technology in Near Term Fundamental Advantages of HV GaN Over HV MOSFET and IGBT

GaN

IGBT

MOSFET

GaN body diode: Lowest reverse recovery charge (Qrr)

GaN MOSFET

IGBT

GaN switch: Lowest switching loss

6x8mm QFN

• IGBT conduction voltage drop is 0.5 - 0.7V at zero current

• Conduction Voltage drop for GaN device is zero at zero current

• GaN device is inherently more efficient at light load

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Recent Market Trends and Their Impact on IR

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Very Challenging Macro Conditions Over Past Six Quarters However, Seeing Potential Signs of Turnaround in US and China

Persistently weak PMI over the past six quarters, especially in China and Europe

• China October PMI climbed to 50.2 from 47.9 last month – the first reading over 50 since July. The private HSBC China PMI rose to 49.5 and is the highest since last February

• European manufacturing October PMI was fell to 45.4 reflecting continued weakness

- German PMI fell 46 from 47.4 last quarter as the manufacturing sector continued to struggle

- France PMI was 43.7 marking the 8th straight month of contraction highlighting a weak French economy

• US October PMI improved to 51.7 from 51.5 last

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Broad-based demand for semiconductors has weakened significantly

• Computing end market has been the weakest.

• Industrial segment continues to soften in China and Europe

• Weakness in home appliance demand further compounded by excess finished goods inventory challenges in China

• The consumer market down significantly

• Wireline communications weakening as governments and carriers reduce capital spend

• Military segment remains weak in Europe and North America

Pocket of strength

• Automotive has shown the most strength relative to the rest of the end-markets

• Supply chain strength at leading smartphone vendors Apple and Samsung

With Two Notable Exceptions, Significant Semiconductor

Sector Demand Weakness Across the Board

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IR Quarterly Revenues ($M)

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IR Business Over Past Six Quarters Has Been Adversely Impacted

$212

$178

$135

$157

$179

$210

$242

$264 $281 $282

$297

$317 $303

$230 $248

$270

$215-$230E

$253

Revenue Decline and Volatility Mainly Driven by

ESP and PMD Business Units …

- 10% +9%

+4%

- 27% - 43%

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… Due to High Exposure to MOSFETs and IGBTs Market

Segments

CY2012 Market Demand Outlook ($M)

- 40% Drop

in Outlook

for CY2012

- 35% Drop

in Outlook

for CY2012

IR Peak Quarter

Source: iSupply Power Management Market Tracker, CY10Q2 – CY12Q3; IR Analysis

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IR Path Forward to Recovery and Profitability

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Fab 3

Fab 2

Fab 11

Fab 10

El Segundo, CA Temecula, CA Newport, Wales

Decommission Planned

Planned production

By mid 2015

Savings $11M/yr

Closure:

End of Mar. 2013

Savings:

$10M/yr

1. Manufacturing Footprint Restructuring

Total Savings: $26M/yr when completed

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By June 2013

Savings: $5M/yr

Phase 2

Phase 1

2. Operating Expense Reduction

~$40M OPEX Reduction on an Annualized Basis

$86.4M

$80.7M $78.5M (E)

$75M (E) R&D

$35.1M

SG&A

$51.3M

R&D

$33.4M

SG&A

$47.3M

R&D

$32.5M (E)

SG&A

$46M (E)

R&D

$30M (E)

SG&A

$45M (E)

……..……..

June 2012 OPEX includes $1.7M in severance.

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3. Increased Manufacturing Utilization At High Utilization IR Can Be Profitable at ~$240M/Quarter Run Rate

(all numbers in $M) Mar-10 Sep-12

Revenue ($M) 241.9 252.5

COGs ($M) 154.6 181.9

Gross Profit ($M) 87.3 70.6

- GM% 36.1% 28.0%

SG&A 43.2 47.3

R&D 25.6 33.4

Opertating Income 18.5 -10.1

Utilization (%) 91% 64%

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Key Assumptions: Sustainable Revenue, ASP stability and Mix Recovery to ~$240M/Quarter

• Revenue Mix Similar to September 2012 Quarter

• 90+% Utilization

Summary

IR well positioned for future growth

• High Voltage Products:

o Benchmark IGBT Platform

o New µMCM technologies

• Digital Power Control

• Next Generation Low- and Mid-Voltage MOSFETs

• Gallium Nitride – Re-entry into High Voltage

Reducing fixed costs to increase future operating leverage

• Resizing manufacturing footprint: Total savings $26M/yr when fully completed

• SG&A and R&D reductions: Total savings $40/yr when fully completed

Strong balance sheet

• $367M /$5.30 per share in cash, cash equivalents and investments

• Tangible book value of 1.2B or $17.7 per share

• No debt

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