Recently redesigned, the Littelfuse 600 V in-line watertight
fuse holders allow maximum protection for high humidity
and corrosive environments. The fuse holders are
designed to be touch-safe and flexible for use in a variety
of applications. See the list below for the redesigned part
numbers.
Applications
• Street lighting and parking lot lighting
• Sports lighting and various outdoor illuminated signs
• Boat electrical circuits, tractors/yard equipment and
general outdoor circuit protection (such as traffic
signals, alley lighting and electric wheelchairs)
LEB/LEX
LEC/LEY
Specifications
Voltage rating 600 V
Ampere rating up to 30 A
Interrupting rating 200 kA rms symmetrical (with Class CC fuses)
Approvals LEB/LEX series UL Recognized Miscellaneous
Fuse holder per UL UL 4248 (File: E14721)
CSA Certified per C22.2, No. 39 (File: LR7316)
LEC/LEY series UL Listed Class CC Branch Circuit
Fuse holder per UL 512 (File: E14721)
CSA Certified per C22.2, No. 39 (File: LR7316)
Features/Benefits
• Design increases safety by facilitating individual device
disconnection for easy servicing, eliminating shock risk
• Increases efficiency by preventing faulted ballast from
severely damaging fixture or device
• Designed to meet IP67 touch-safe standards
• Watertight o-ring seal
• Variety of terminations available for flexible design
• Insulating boots available for harsh environments
Recommended Fuses
LEB/LEX series:
Class CC Series: CCMR, KLDR, KLKR
Midget Series: BLF, BLN, FLM, FLQ, KLK, KLKD
LEC/LEY series:
Class CC Series: CCMR, KLDR, KLKR
Web Resources
Sample requests, downloadable CAD drawings and other
technical information: littelfuse.com/in-line
Look for these part numbers featuring our
improved design
• Better surface area for ergonomic comfort, improved grip
and better torque
• More pronounced seating – automatically seats as user
begins twisting
• Chamfered edges for additional installation comfort
• LEXT-YY version has a permanently installed “neutral”
slug to prevent the neutral from accidentally being fused
• LEX-YYC version allows for fusing of line-to-line loads
or other applications requiring two fuses to disconnect
under strain
• Fiberglass polymer body resists damage from impact
• Four “Y” type set-screw terminals accommodate a wide
range of solid and stranded Cu or Al conductors
• O-ring and terminal boots form watertight seal,
preventing leakage
Specifications
Description
Littelfuse LEXT-YY-S and LEX-YYC-S series breakaway fuse
holders meet state and federal highway commission safety
standards requiring fuse holders to readily disconnect from
power in case of a pole knockdown.
The breakaway feature consists of a receptacle permanently
attached to the power line and a fuse holder with matching
terminals. If a knockdown occurs, the parts separate, leaving
the energized conductor recessed and unexposed.
Ordering Information
LOAD TERMINAL SELECTIONLINE TERMINAL SELECTION
Part numbers LEXT-YY-S (Solid neutral)
LEX-YYC-S
Voltage Rating 600 VAC/VDC
Ampere Rating 30 A
Interrupting Rating 200 kA with Class CC Fuses
Y Terminals Tin Plated Copper w/ set screws
Wire Size 1 solid #12 to #8 or
1 stranded #10 to #2
Approvals UL Recognized (File: E14721)
CSA Certified (File: LR7316)
Class CC Series: CCMR, KLDR, KLKR
Midget Series: BLF, BLN, FLM, FLQ, KLK, KLKD
Four WPB3 insulating boots come standard with the LEXT-YY-S and LEX-YY-C-S fuse holders. Molded from non-conductive
engineering grade thermoplastic to deliver a watertight seal in corrosive environments, they can be trimmed to the specific
conductor size insuring a snug fit.