© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/01/18
Enclosed Fuseholders > Panel Mounted
Cartridge Fuse Holders
RoHS
Pb
Product Characteristics
Compatible
Fuses For 3AB, 3AG, 5×20mm, or 2AG Fuses
Description
Designed to eliminate the possibility of electrical shock,
as defined in IEC 60127-6. The universal fuseholder
body will accept 3AB, 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.
Electrical
Insulation Resistance: 10,000 megohm minimum at
500 VDC. Contact Resistance: Less than .005 ohm
average at currents up to 1 ampere.
Mounting
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.
Molded Parts Body Material: Black glass-filled thermoplastic
(UL94 V0).
Knob Material Grey, blue or black glass-filled thermoplastic (UL94 V-0)
Hex Nut Material: Black glass-filled thermoplastic.
Knob
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.
Terminals
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.
Ambient
Temperature* –40ºC to +85ºC.
Hardware
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. Accesories can be order by separately.
* - Refer to Fuseology for information on proper re-rating.
345 Series Shock-Safe Panel Mount Enclosed Fuse Holders
Agency Approval
Agency Agency File
Number
3AG/AB
(6.3x32mm) 5×20mm 2AG
E14721 20A 250V 20A 250V 10A 250V
7316 20A 250V 20A 250V 10A 250V
40001642 10A 250V 10A 250V —
Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/01/18
Enclosed Fuseholders > Panel Mounted
Cartridge Fuse Holders
Ordering Part Numbering System to order complete fuse holder (body and knob)
Dimensions
F
U
S
E
F
U
S
E
F
U
S
E
F
U
S
E
.60" DIA.
.65" DIA.
.41" 1.59"
.50" MIN. 1.50" MAX.
Low Profile Fingergrip Knob
Rear Mount Fingergrip Knob
special 1/2" thread
special 1/2" thread
special 1/2" thread
special 1/2" thread
F
U
S
E
F
U
S
E
.40"
1.35"
High Profile Screwdriver Slot Knob
.04"x.25"
F
U
S
E
F
U
S
E
´
.16"
1.59"
Low Profile Screwdriver Slot Knob
.04"x.25"
F
U
S
E
F
U
S
E
.16"
1.59"
Quick Mount Screwdriver Slot Knob
.04"x.25"
Terminal Styles
Suggested Mounting Holes
Bottom Terminal
.090" x .160"
HOLE .055"
HOLE
.070"
HOLE
3/16" DUAL
PURPOSE
SOLDER/QUICK
CONNECT
1/4" NEMA/DIN
QUICK CONNECT
3/16" NEMA
QUICK CONNECT
.187" .187" .250"
.475"
.480"
.460"
.465"
.500"
.505"
A
B
C
ABC
.187" QC
.250" QC
.53" .30" .020"
.59" .36" .032"
Right Angle Straight
"Push-On" Type Retaining Nut
for Quick Mount Fuseholder
Plastic Hex Nut with Flange
.91" DIA.
.63"
.19"
.65"
DIA.
.558"
HEX.
SPECIAL
1/2" THREAD
.60" DIA.
.60" DIA.
.60" DIA.
Accessory*
L
Lockwasher
N
Neoprene Washer
P
Drip-Proof "O" Ring**
with Neoprene Washer
Packing
H
For 100 Pieces (Bulk)
Terminals
1
3/16" (Rt. Angle)
Dual Purpose Solder/QC
2
3/16" (Straight)
Dual Purpose 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
Style
LF
Low Profile Body
Black Fingergrip Knob
RF
Rear Mount Body
Black Fingergrip Knob
HS
High Profile Body
Screwdriver Slot Knob
LS
Low Profile Body
Screwdriver Slot Knob
QS
Quick Mount Body
Screwdriver Slot Knob
Screwdriver Slot Knob
2AG - Blue Knob
3AG - Grey Knob
5 x 20mm - Black Knob
Fuse Size
2
2AG
.177" x .570"
3
3AG
.250" x 1.250"
5
5 x 20mm
.197" x .787"
0 345 3 LS 7 H X L N P
Series Name
*Optional (L,N,P) can be ordered
individually or in combination
**Screwdriver slot knob only
Example 03453LS7HXLNP - A 345 Series fuse holder for 3AG fuses with low profile body and a Screwdriver Slot knob, with
1/4" (Rt. Angle) Nema/Din QC terminals.
Note - If accessory is needed, add the "X" as filler on the ordering part number
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/01/18
Enclosed Fuseholders > Panel Mounted
Cartridge Fuse Holders
Fuse Size Fingergrip Knob Screwdriver Slot
Knob
2AG 03452LF1HX020 03453LF1HX020
3AG 03453LF1HX020 03453LF1HX020
5 × 20mm 03453LF1HX020 03453LF1HX020
H - 100 Pieces (Bulk)
X - Filler
Terminal Style Bottom Terminal Low Profile Body
Part Number***
High Profile Body
Part Number
Rear Mount Body
Part Number
Quick Mount Body
Part Number
3/16” Dual Purpose (Rt. Angle) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010
3/16” Dual Purpose (Straight) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010
3/16” NEMA QC (Rt. Angle) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010
3/16”NEMA QC (Straight) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010
¼” NEMA/DIN QC (Rt. Angle) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS8ZX010
¼”NEMA/DIN QC (Straight) 03453QS4ZX010 03453QS4ZX010 03453QS4ZX010 03453QS8ZX010
***Low Profile Body will accept either Fingergrip or Screwdriver Slot Knob.
Z - 100 pieces (Bulk)
X - Filler
To Order Body Including Nut(s) Only
To Order Knob Only
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics.
To Order Accesories Only
Accesory Packaging Part Number
ACS Rubber Washer Bulk (100 pieces) 09010002H
ACS Nut Bulk (100 pieces) 09030097H
ACS Lockwasher Bulk (100 pieces) 09050023H
ACS O-Ring Bulk (100 pieces) 09010134H
H - 100 Pieces (Bulk)
