Littelfuse 254 Series - Manual

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Cartridge Fuse Blocks
OPTIONS:
1. Other colors available on special order. Contact factory.
2. Two different style clips can be supplied for circuit identity or
polarization. Contact factory.
Compatible
Fuses Size
2AG
Description
This low profile Omni-Blok ® Fuse Block
design is available with a choice of solder
type terminals, Q.C. terminals or P.C.
board mountable terminals. The PCB
design is offered with either tin-plated
brass terminals for normal applications or
tin-plated beryllium copper terminals for
use in caustic environments. These fuse
blocks feature individual barriers which
reinforce the fuse clips while providing
greater protection against clip damage
and electrical shock. The unique design
permits self-alignment of clips to fuse
cap. This, plus a one-piece clip/terminal
assures low contact resistance. Multiple
units may be broken apart to obtain
desired number of units.
Dielectric
Strength
1500V., Minimum
Clip/Terminals
Tin-Plated Spring Brass, except pn 254121 is
Tin-Plated Beryllium Copper
Base
Black Thermoplastic, glass reinforced with
UL 94V0 flammability rating
Ambient
Temperature
–40ºC to +85ºC
Product Characteristics
Solder & q.C. Types:
P.C. Board Mount Type
.35"
REF.
.50"
REF.
.81"
REF.
.04"
REF.
.19"
REF.
.730"
.005"
.050"
.055" DIA. HOLES (2 LOCATIONS)
Recommended Hole Pattern
.190" DIA. X .187" DEEP C' BORE
Typ. with .050" Typ. material remaining.
1.22"
REF.
.70"
REF.
.24" REF.
.53"
REF.
.016"
REF.
.090" REF. DIA. THRU
45
B
.450"
centers typ.
.70" typ.
.190" x .187" deep
C bore with .050"
material remaining
.090" REF. DIA. Thru
Solder type terminals
feature elongated
hole on clip
With 2AG
fuse installed
.35" typ.
.110" typ.
.50" typ.
.35"
REF.
.50"
REF.
.81"
REF.
.04"
REF.
.19"
REF.
.730"
.005"
.050"
.055"
DIA. HOLES
(2 LOCATIONS)
Recommended Hole Pattern
.190" DIA. X .187" DEEP C' BORE
Typ. with .050" Typ. material remaining.
1.22"
REF.
.70"
REF.
.24" REF.
.53"
REF.
.016"
REF.
.090" REF. DIA. THRU
45
B
.450"
centers typ.
.70" typ.
.190" x .187" deep
C bore with .050"
material remaining
.090" REF. DIA. Thru
Solder type terminals
feature elongated
hole on clip
With 2AG
fuse installed
.35" typ.
.110" typ.
.50" typ.
Dimensions
Agency Approval
Agency Agency File Number
E14721
LR7316
254 Series OMMI-BLOK ® Molded Base Fuse Block for 2AG Fuses
Additional Information
Datasheet Samples Resources