Littelfuse 345bk User Manual
Cartridge Fuse Holders
Enclosed Fuseholders > Panel Mounted
345 Series Shock-Safe Panel Mount Enclosed Fuse Holders
Product Characteristics
Additional Information
Compatible
Fuses
Description
Electrical
Mounting
Molded Parts
Knob Material
Knob
Terminals
Ambient
Temperature
Hardware
For 3AG, 5×20mm, or 2AG Fuses
Designed to eliminate the possibility of electrical
shock, as defined in IEC standards 60065 and 60127.
The universal fuseholder body will accept 3AG, 5
× 20mm, and 2AG fuse sizes depending on knob
selected. Permits inventory reduction of bodies and
provides knob interchange versatility. Anti-tease feature
eliminates circuit interruption when knob is accidentally
depressed. Five fuseholder types assure design
flexibility. Available with two knob styles — screwdriver
slot or fingergrip. Available in two terminal styles
— dual-purpose for soldering or 3/16” NEMA quick
connect; and ¼” NEMA/DIN quick connect. Quick fuse
size identification is provided with letters on fingergrip
knob and color-coded screwdriver slot knobs.
Insulation Resistance: 10,000 megohm minimum at
500 VDC. Contact Resistance: Less than .005 ohm
average at currents up to 1 ampere.
Threaded styles withstand 15 in.-lb. mounting torque.
Low profile and High profile panel thickness: .032”
min./.310” max. Quick mount panel thickness: .012”
min./.360” max. Rear mount panel thickness: .012”
min./.260” max.
Body Material: Black glass-filled thermoplastic (UL
94V0).
Grey, blue or black glass-filled thermoplastic (UL94 V-0)
Hex Nut Material: Black glass-filled thermoplastic.
Finger-Grip, Fuse Extractor type or Screwdriver Slot,
Fuse Extractor type with plated copper alloy insert.
Plated copper alloy contact clips. Spring loaded, locking
mechanism provides an anti-tease feature and will not
vibrate loose.
Copper alloy. Tin-plated. Three styles available. A .187”
dual purpose terminal accepts wire for soldering or a
Quick-Connect receptacle. .187” terminal for NEMA
Quick-Connect and .250” terminal for NEMA/DIN
Quick-Connect available.
–40ºC to +85ºC.
Threaded style fuseholders are supplied with a
thermoplastic hex nut unassembled. Quick mount style
fuseholders are supplied with a push-on type retaining
nut, black oxide finish, unassembled. A synthetic rubber
“O” ring will be supplied only with the screwdriver
slot knob when the drip-proof version is requested.
To order with a metal internal tooth lockwasher (L)
and/or neoprene panel washer (N) and/or drip-proof
synthetic rubber “O” ring with Neoprene washer (NP)
[Screwdriver slot knob only], add the appropriate suffix
(L, N, or NP) respectively (or in combination) to the
catalog number.
Agency Approval
Agency Agency File
Number
E75961 20A 250V 10A 250V 10A 250V
LR91788 20A 250V 10A 250V 10A 250V
3AG 5×20mm 2AG
Datasheet
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Resources
Samples
116895E 10A 250V 10A 250V —
* Please refer to Fuseology section for information on proper fuseholder de-rating.
EXAMPLE:
(Complete Assembly with Options)
Dimensions
.04"x.25"
.04"x.25"
.04"x.25"
Terminal Styles
Plastic Hex Nut with Flange
Cartridge Fuse Holders
Enclosed Fuseholders > Panel Mounted
Low Profile Fingergrip Knob
S
U
E
F
F
E
U
S
Rear Mount Fingergrip Knob
S
U
E
F
F
E
U
S
High Profile Screwdriver Slot Knob
S
U
E
F
F
E
U
S
Low Profile Screwdriver Slot Knob
S
U
E
F
F
E
U
S
Quick Mount Screwdriver Slot Knob
S
U
E
F
F
E
U
S
Part Numbering System
.60" DIA.
.41"
.65" DIA.
.50" MIN.
.60" DIA.
.40"
.60" DIA.
.16"
.60" DIA.
.16"
´
special 1/2" thread
1.59"
special 1/2" thread
1.50" MAX.
special 1/2" thread
1.35"
special 1/2" thread
1.59"
1.59"
.090" x .160"
HOLE
.187" .187" .250"
3/16" DUAL
PURPOSE
SOLDER/QUICK
CONNECT
Suggested Mounting Holes
.475"
.480"
.500"
.505"
"Push-On" Type Retaining Nut
for Quick Mount Fuseholder
.63"
.91" DIA.
.055"
HOLE
3/16" NEMA
QUICK CONNECT
.460"
.465"
Right Angle
A
.187" QC
.250" QC
.19"
SPECIAL
1/2" THREAD
.070"
HOLE
1/4" NEMA/DIN
QUICK CONNECT
Bottom Terminal
Straight
C
ABC
.53" .30" .020"
.59" .36" .032"
B
.65"
DIA.
.558"
HEX.
Terminal Style Bottom Terminal
3/16” Dual Purpose (Rt. Angle) 3453LF1-010 3453HS1-010 3453RF1-010 3453qS1-010
3/16” Dual Purpose (Straight) 3453LF2-010 3453HS2-010 3453RF2-010 3453qS2-010
3/16” NEMA QC (Rt. Angle) 3453LF3-010 3453HS3-010 3453RF3-010 3453qS3-010
To Order Body Including Nut(s) Only:
3/16”NEMA QC (Straight) 3453LF4-010 3453HS4-010 3453RF4-010 3453qS4-010
¼” NEMA/DIN QC (Rt. Angle) 3453LF7-010 3453HS7-010 3453RF7-010 3453qS7-010
¼”NEMA/DIN QC (Straight) 3453LF8-010 3453HS8-010 3453RF8-010 3453qS8-010
***Low Profile Body will accept either Fingergrip or Screwdriver Slot Knob.
Fuse Size
2
2AG
.177" x.570"
3
3AG
.250" x 1.250"
5
5 x 20mm
.197" x.787"
Series Number
LowProfile Body
Black Fingergrip Knob
Rear Mount Body
BlackFingergrip Knob
High Profile Body
Screwdriver Slot Knob
LowProfile Body
Screwdriver Slot Knob
Quick Mount Body
Screwdriver Slot Knob
Screwdriver Slot Knob
2AG—Blue Knob
3AG—Grey Knob
5x20mm — Black Knob
345 3LS7LNNP
Style
LF
RF
HS
LS
QS
Low Profile Body
Part Number***
Terminals
1
3/16"(Rt. Angle)
DualPurpose Solder/QC
2
3/16" (Straight)
DualPurpose Solder/QC
3
3/16"(Rt.Angle)
NEMA QC
4
3/16" (Straight)
NEMA QC
7
1/4"(Rt.Angle)
NEMA/DIN QC
8
1/4" (Straight)
NEMA/DIN QC
High Profile Body
Part Number
Lockwasher
Neoprene Washer
Drip-Proof “O” Ring**
with Neoprene Washer
**Options(L, N, NP) can be ordered
individually or in combination.
**Screwdriverslot knobonly.
To Order Knob Only:
Fuse Size
2AG 3452LF1-020 3452LS1-020
3AG 3453LF1-020 3453LS1-020
5 × 20mm 3455LF1-020 3455LS1-020
Rear Mount Body
Options*
L
N
NP
Fingergrip
Screwdriver Slot
Knob
Quick Mount Body
Part Number
Specifications are subject to change without notice.
Part Number
Knob
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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