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Safeguarding People & Equipment

Littelfuse has moved beyond fuses into protection relays and other components to offer a unique safety package to its customers.
With Littelfuse, safety managers and plant engineers can protect their employees, equipment and productivity from electrical hazards.


Fastest Arc-Flash Detection on the Market

Detects a developing arc flash in less than 1ms
Sends a trip signal to interrupt power before
damage occurs
Lowers Hazard Risk Category (HRC) of
the equipment





First UL Listed Industrial GFCI for Shock Protection

Provides shock protection at 208 V, 240 V,
480 V and 600 V
Safest product on the market, meets stringent
UL 943C requirements
Monitors ground-wire continuity and other
potentially dangerous conditions

Datasheet

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Medium Voltage Protection for Motors and Transformers

Fast delivery available
R-Rated, E-Rated and potential transformer fuses

Datasheet

Broad Base of Fuses for Diverse Requirements

Indicating fuses takes the guesswork out of
replacement and increases up-time
Tools to aid fuse cross-reference and selection
for improved safety



Gain Space and Power with Midget 10x38mm Fuses

Provides supplemental overcurrent protection
Available in time-delay, fast-acting, board mount
or solar versions
Wide range of products for varied applications

Datasheet

Meet NEC® Code Without Bringing Voltage to the Door

Indicates ground faults and the presence of
voltage on both grounded and ungrounded systems
■ Meets NEC® Article 250.21 and CEC® Part 1,
Section 10-106 (2) requirements for ungrounded
systems

Datasheet

Space-Saving Protection for Motors and Branch Circuits

Extremely current-limiting design for
safer applications
■ Smallest fuse with 300 kA interrupting rating
■ Current up to 60A

Datasheet

Protect Critical Power Electronics

Arc-barrier technology specially designed to improve ■ semiconductor lifecycle
■ Extremely current limiting to reduce peak let-through ■ current
■ Low watt loss values save energy wasted during ■ operation

PSR Datasheet     POWR-Speed® Video

L50QS Datasheet

L70QS Datasheet

Dual Protection Detects Seal Failures on Submersible Pumps

PC-102-DL: Dual Seal-leak detector
PC-102-LT: Dual Seal-leak and over-temperature
detector
■ Compact design with finger-safe terminals
■ Two Form C isolated contacts with LED
status indicators

Datasheet

Controls Levels in Conductive Liquid Pumping Operations

Liquid level control with 2-probe inputs and
SPDT output allows use in both conductive
and non-conductive tanks
Adjustable debounce time delay prevents
nuisance tripping due to waves or splashing in tank
Invertible relay logic allows use in pump-up
and pump-down applications

Datasheet

Detects Presence of Conductive Liquids

Adjustable debounce time delay prevents
nuisance tripping due to waves or splashing in tank
Invertible relay logic allows use in pump-up
and pump-down applications
■ DIN rail or surface mount

Datasheet

Increase Uptime and Reduce Arc-Flash Damage

Eliminates arc flash hazard associated with
ground faults (<5 A)
Continuously monitors neutral-to-ground
path for continuity

NGR Datasheet

SE-330 Datasheet

Detects Seal Failures on Submersible Pumps

Micro-controller based relay monitors the shaft
seal of submersible pump motor
■ Adjustable sensitivity setpoint for the
probe resistor
■ DIN rail or surface mount

Datasheet

Self-Powered Load Sensor for use as AC Current Proof Relay

No need for separate power control wiring;
draws power from wire being monitored
Quick-connect fast on terminals or depluggable
screw terminals
Monitors up to 200A loads

Datasheet

Self-Powered Load Sensor for use as Proof Relay

No need for separate power control wiring;
draws power from wire being monitored
Verifies current is flowing as intended
■ Monitors up to 135A loads

Datasheet

Detects Seal Failures on Submersible Pumps

Micro-controller based relay monitors the
shaft seal of submersible pump motor
■ Adjustable sensitivity setpoint for the
probe resistor
■ Compact plug-in design; DIN rail or
8-pin socket mount

Datasheet