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Our legacy and our future
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Littelfuse Is the Preferred Brand for
Circuit Protection Products
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The #1 Brand In Circuit Protection -The Largest Portfolio Of Solutions
Automotive
Electrical
Electronics
Littelfuse has the broadest and deepest portfolio of circuit protection products serving
three major market segments…
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Electronics Business Unit
Littelfuse Solutions for Today’s Advanced Products
Handheld
Digital Consumer
Telecom
General Electronics
SIDACtor® & Battrax®
Protection Thyristors
MLVs
MLVs
TVS Diode Arrays
MOVs
PulseGuard® ESD
Suppressors
TVS Diode Arrays
TVS Diodes
Telelink
Surface Mount Fuses
PulseGuard ® ESD
Suppressors
DC Power Fuses
Fuses –
leaded/cartridge
Fuses – leaded/cartridge
Power Thyristors
Resettable PTCs
Fuses – leaded/cartridge
Greentube™ Gas Plasma
Arresters
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Fuses
MLVs
MOVs
Surface Mount Fuses
Resettable PTCs
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Automotive Business Unit
Automotive OEMs Around the World Rely on Solutions from Littelfuse
Safety (Airbags, Battery
Disconnect, Anti-rollover,
Stability Control, etc.)
Hybrid Vehicles (Gas Electric, Fuel-cell
Electric, Li-Ion Polymer, etc.)
PTCs, MOVs, MLVs, TVS Diodes
EV Fuses
Comfort and Infotainment (Ride
Control, Climate Control,
Navigation Systems, Seating
Controls, etc.)
Performance and Emissions
(Engine Management, Adaptable
Suspension, Advanced Power-trains)
PTCs, MOVs, MLVs, TVS Diodes, PulseGuard® ESD
Suppressors, Electronic Fuses, GDTs
PTCs, MOVs, MLVs, TVS Diodes, TVS Thyristors, Fuses
• Today’s automobiles include more electronic systems
than ever before. Littelfuse's automotive solutions protect
these systems from a wide range of potential overcurrent
and transient voltage hazards.
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Electrical Business Unit
Protecting Critical Business Assets
Service Entrance Switches
KLPC Class L Fuses
• Overload protection
• Short-circuit protection
Conveyor
Motor
Circuits
LLSRK_ID Class
RK1 Fuses
• Overload protection
• Short-circuit protection
Compressor
Motor Circuits
JTD_ID Class J Fuses
• Overload protection
• Short-circuit protection
Conveyor
Control Circuits
CCMR Class CC Fuses
• Overload protection
• Short-circuit protection
 As industrial equipment becomes more sophisticated, so does
the need for circuit protection.
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We offer protection against all common
threats to electric circuits and components
Every product that uses
electrical energy needs
circuit protection to ensure
safety, reliability and
performance…
Littelfuse has
the solution
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Littelfuse - The only company to offer a complete
range of circuit protection technologies
No competitor can match Littelfuse’s broad product offering and technical
expertise in circuit protection applications...
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Our Customers Are Global Market Leaders
LEADING OEMs
EMERGING OEMs
EMS/ODM
TIER 1 AUTO
VESTEL
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Littelfuse Continues to Build a Strong
Worldwide Presence
Littelfuse has leading market positions in all three regions of the world
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Littelfuse Has Broad End-Market Exposure
AUTOMOTIVE
TELECOM
• VOIP
• LAN / WAN
• Telco Central Office
CONSUMER
• Hand-held devices
• Entertainment
• Computers
• OEM / Aftermarket
• Off-road, truck & bus
• Automotive electronics
INDUSTRIAL
• Factory Automation
• Lighting applications
• White goods
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Overview of Littelfuse
circuit protection technologies
Overvoltage
Technologies
 TVS Diodes
 Varistors
 SIDACtor Devices
 Gas Plasma Arrestors (GDTs)
 Silicon Protection Arrays (SPAs)
 PulseGuard ESD Suppressors
Overcurrent Technologies
 Positive Temperature Coefficient Devices (PTCs)
 Fuses
Switching Technologies
 Switching Thyristors
Services
 Application Testing Services
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Fuses
Broadest selection of any company
Where Used:
Protect equipment from current overloads or short circuits by
completely stopping the flow of dangerous current –
Littelfuse offers the broadest selection to serve the widest
range of applications
Available Range:
Options from .062A – 100kA and up to 1000V
Cartridge
Axial Leaded
Surface Mount Nano and Thin Film
Automotive Blade Fuses
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POWR-GARD
SPF Solar Rated Fuse
Central
Inverter
Protection
using
Littelfuse
Class L/J
fuses
Where Used:
String protection, Re-combiners
Inverter DC Input protection
IEC60269-6, UL2579 coming soon
Available Range:
Options from 1A up to 30A @ 1000V
Breaking capacity 20.000A
Leaded version available for
PCB mounting
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Increase Safety and Protect Expensive Equipment
from Damage, Reduce Downtime
Our comprehensive line of microprocessor-based protection
relays safeguard equipment and personnel to prevent
expensive damage, downtime or injury due to electrical faults.
We offer:
- Ground Fault Relays
- Motor Protection Relays
- Feeder Protection Relays
- Supplemental Monitors
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Polyfuse® PTCs
Resettable fuse alternative
Where Used:
When maximum uptime is desired or fuse replacement difficult –
PTCs restrict flow of dangerous current while allowing safe
currents to continue equipment operation
Available Range:
SMD - 0603, 0805, 1206, 1210, 1812, 2016, 2920
Radial Leaded - 6V, 16V, 30V, 60V, 72V
Telecom - 250V, 600V
Battery Strap
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TVS Diodes
Protect semiconductors from transient volts
Where Used:
TVS Diodes respond to overvoltage events faster than most other
types of circuit protection – Ideal for consumer electronics,
industrial and telecom applications
Available Range:
400 W to 30,000 W SMT and Axial
6.8V to 550V
Uni-directional and bi-directional products available
6 kA, 10 kA, 15KA high surge capability device
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Silicon Protection ArraysTM
Best-in-class clamping performance for ESD, EFT,
and Lightning-Induced Transients
Where Used:
Silicon Protection Arrays (SPAs), commonly called Diode Arrays,
are a family of discrete diodes and diode arrays designed to
protect sensitive electronic equipment against destructive
electrostatic discharges (ESD) and other electrical transients.
Available Range:
• Number of Channels:
1, 2, 3, 4, 5, 6, 8, 14
• Standoff Voltage:
2.5V - 30V
• ESD (IEC61000-4-2, Contact):
4kV - 30kV
• Capacitance (@ 0V Bias):
0.4pF - 50pF
• Lightning (IEC61000-4-5, tP=8/20µs): 1A - 150A
• EFT (IEC61000-4-4, tP=5/50ns):
≥ 40A
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Switching Thyristors
Solid state switches to control the flow of current
Where Used:
Thyristors are solid state switches used to control the flow of current
• Capable of blocking rated voltage until triggered to the on-state
• Typically used in water heaters, gas ignitors, and a wide variety of electrical controls
Available Range:
SCR Silicon Controlled Rectifier (Standard and Sensitive Gate types)
Triac (Standard, High Commutating Alternistor, High Temperature, and QUADRAC types)
SIDAC (Standard, High Energy, MultipulseTM, and Unidirectional types)
• 0.8A to 70ARMS continuous current ratings
• Up to 1000VRMS blocking voltage ratings
• TO-220, TO-218, DPAK, TO-92, SOT223, and a variety of other THT and SMT packages
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Protection Thyristors
SIDACtor® protectors for Telecom and Datacom
Where Used:
Protect telecom equipment and ADSL2+, VDSL2+, Ethernet,
SLIC, VOIP and POTS applications from high voltage surges
Available Range:
Leaded Devices: DO-15, TO-92, TO220 and CELL
Surface Mount: DO-214, 3L DO-214 Compak, MS-013 6-pin,
MS-012 (SO-8) , 3x3 ,3.3X3.3 and 5x6 QFN
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Varistors - MOVs
High energy protectors from power spikes/lightning
Where Used:
Protect sensitive equipment from power spikes or lightning
strikes by shunting the energy to ground – typically used in
industrial applications
Available Range:
Radial Leaded (LA, ZA, UltraMOV, CIII)
Axial Leaded (MA)
Bare Disk
Surface Mount (CH, SM7, SM20)
Industrial (BA/BB, DA/DB, HA/HB)
Thermal MOV (TMOV)
Newly Released
SM7
SM20
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Varistors - MLVs
Small surface mount varistors for ESD suppression
Where Used:
Suppress ESD and other transients that occur on power supply,
signal, and control lines – Computers, Mobile Communications,
Handheld Electronics, I/O Ports, Alarm & Control Systems,
Automotive Electronics and Industrial Automation.
Available Range:
ML - Standard Series also available in 0201 package
MHS - High Speed (Lowest Capacitance)
MLE - ESD Suppression and Filtering
AUML - Automotive Transients
MLN - SurgeArray Series(4 Line Device)
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Gas Plasma Arrestors (GDTs)
Suppress network damage through a contained gas
Where Used:
Suppress damaging voltage transients including lighting in
a contained plasma gas – ideal for broadband, ADSL,
XDSL, CATV, Satellite and other network and
communication equipment
Available Range:
Form: Surface Mount, Cartridge, Radial and Axial Leaded
Electrode: 2 and 3 terminals/electrodes
Voltage Range: 90V-5000V
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PulseGuard ESD Suppressors
Protect integrated circuits from static discharge
Where Used:
Supplement on-chip protection of IC’s; to increase the
reliability of the end product -- used in low voltage (up to
24VDC) applications to protect the data/signal/control lines
against user-generated ESD
Available Range:
- Single and Multiple Line Suppressors
- 0402, 0603 and SOT23 package types
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Why circuit protection?
Safety,
Reliability and
Compliance
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Protecting End Users
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Protecting Products from Damage
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Reducing or eliminating risk of injury
Reduce risk of spikes, electrostatic discharge (ESD),
lightning, misuse
Increased product reliability and lower warranty repair costs
Compliance with Standards
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Achieve safety standards acceptance
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One Stop Shopping- Littelfuse Advantage
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Why Littelfuse?
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#1 circuit protection brand in the world
Complete range of circuit protection technologies
Product and application expertise
Increased market acceptance and reduced liability
Available globally
Global application testing capabilities
Technology leader
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