
Cartridge Fuse Holders
Enclosed Fuseholders > Panel Mounted
344 Series Blown Fuse Indicating Holders for 3AG Fuses
Product Characteristics
344 000 Series 344 400 Series
Dimensions
344 000 Series
RUBBER WASHER
.94" 
344 400 Series
RUBBER WASHER
.94" 
LOCK WASHER
HEX NUT
.81"
2.38" MAXIMUM
WITH FUSE INSTALLED
LOCK WASHER
HEX NUT
.11" 
DIA.
.09" x .13" 
HOLE 
IN SIDE 
TERMINAL
.11" 
DIA.
.627" 
.635"
.567" 
.575"
Compatible 
Fuses
Electrical
Mounting
Molded Parts
Knob Bayonet style.
Terminals Copper & copper alloy. Tin plated.
Ambient 
Temperature
Hardware
* Ensure that proper de-rating is factored in fuseholder selection.
3AG
Rated at 20 amperes at lamp voltage shown below.  
Dielectric: withstanding voltage exceeds 1500 volts. All 
fuseholders are supplied with a resistor. When designing 
indicating type fuseholders into a circuit, consideration 
should be given to the resistance of fractional amperage 
fuses and the parallel resistance of the indicator lamp 
and 7its resistor.
Withstands 15 lb.-in. mounting torque. Maximum panel 
thickness is .250”.
Black Thermoplastic (UL94 V-0), except lens is 
thermoplastic (UL94 V-2). See Table below for lens color.
–40ºC to +85ºC.
Neoprene washer, lockwasher & hex nut  
unassembled. O-ring option available must  
be ordered separately using part numer  
901-108.
Agency Approvals
Agency Agency File Number
E14721
1. 10"
2.67" MAXIMUM
WITH FUSE INSTALLED
Additional Information
Datasheet
Resources
Samples
Ordering Information
Catalog Number
344 000 
Series 
(Bar 
Knob)
344 006 344 401 2.5 to 7
344 012 344 402 7 to 16
344 024 344 403 16 to 32
344 125 344 404
344 250 344 405
344 
400 
Series 
(Round 
Knob)
Voltage 
Range
100 to 
125
200 to 
250
Lamp Type 
Rating
6V 
Incandescent
14V 
Incandescent
28V 
Incandescent
Neon
Neon
Lamp 
Current
Rear 
Lens 
Color
Panel
.20 amp Amber
.08 amp Amber
.04 amp Amber
.002 
amp
.002 
amp
Clear
Clear
© 2013 Littelfuse, Inc. 
Specifications are subject to change without notice. 
Revised: 12/19/13