347

Specications are subject to change without notice.

Special Application Fuses

Alarm Indicating Fuse 481 Series

481 Series Alarm Indicating Fuse

Please refer to www.littelfuse.com/series/481.html for current information.

481 Series

481 Series Alarm Indicating Fuse

Description

Agency Approvals

Agency Agency File Number

E71611

LR 29862

Electrical Characteristics

Features

t $PMPSDPEFEJOEJDBUPS

ýBHTJOEJDBUFBNQFSF

SBUJOH

t $MFBSQMBTUJDMFOT

PQUJPOBWBJMBCMFGPS

BEEJUJPOBMTBGFUZ

t #PEZJTDPOTUSVDUFEPG

CMBDLQMPMZQIFOZMFOF

TVMåEFXJUI6-7

ýBNNBCJMJUZSBUJOH

t $POUBDUTNBEFPG

CSJHIUBMMPZQMBUFE

CFSZJMMJPVNDPQQFS

Applications

% of Ampere

Rating

Opening Time

 .JOVUFT.JOJNVN

 .JOVUFT.BYJNVN

Electrical Characteristics

"UISV"JUFNTBSFOPUBWBJMBCMFGPSTBMFBTB3P)4DPNQMJBOUi1wPQUJPO

"'VTFIPMEFSNVTUCFVTFE'VTFJTLFZFEUPQSFWFOUJOTFSUJPOJOMPXFSSBUFEIPMEFST

"'VTFIPMEFSJTEFTJHOFEUPBDDFQUBMMSBUJOHTVQUPBNQFSFT

Ampere

Rating

(A)

Amp

Code

Max

Voltage

Rating

(V)

Interrupting

Rating

Body

Color

Code

Nominal

Cold Resistance

(Ohms)

Nominal Melting

t (A

Sec.)

Agency

Approvals

 

7"$

7%$

"!7%$

"!7"$

VQUP"

"!7%$

VQUP"

"!7%$

VQUP"

:FMMPX   Y Y

  3FE#MBDL   Y Y

  7JPMFU   Y Y

  (SBZ8IJUF   Y Y

  3FE   Y Y

  #MBDL   Y Y

  #SPXO   Y Y

  (SBZ   Y Y

  8IJUF   Y Y

  :FMMPX8IJUF   Y Y

  0SBOHF   Y Y

  0SBOHF8IJUF   Y Y

  #MVF   Y Y

  #MVF8IJUF   Y Y

  #SPXO8IJUF   Y Y

  (SFFO   Y Y

  #MBDL8IJUF   Y Y

  3FE8IJUF   Y Y

  (SFFO:FMMPX   Y Y

  3FE#MVF   Y Y

  (SFFO8IJUF   Y Y

*EFBMGPSUFMFDPNNVOJDBUJPOTBOEDPOUSPMQBOFMDJSDVJUT

4FSJFTBMBSNJOEJDBUJOHGVTFTBSFEFTJHOFEUPSFEVDF

EPXOUJNFCZJNNFEJBUFMZQJOQPJOUJOHUIFCMPXOPQFO

DJSDVJUXIJMFUSJHHFSJOHBO-&%PSBVEJPBMBSN5IJTJUFN

SFRVJSFT4FSJFTNBUJOHGVTFIPMEFS

"MMSBOHFTPG4FSJFTGVTFTBSFBWBJMBCMFBTPVSPSJHJOBM

EFTJHOBOEUIFBNQSBOHFJTOPXBWBJMBCMFBTB3P)4

DPNQMJBOUPQUJPOVTFUIFi1wEFTJHOBUPSXIFOPSEFSJOH

4FFUIFQBSUOVNCFSJOHTFDUJPOPGUIJTEBUBTIFFUGPSSFMBUFE

PSEFSJOHJOTUSVDUJPOT

Revised: August 10, 2011

Introduction to Circuit Protection

Transientology

348

Specications are subject to change without notice.

Special Application Fuses

Alarm Indicating Fuse 481 Series

481 Series Alarm Indicating Fuse

Please refer to www.littelfuse.com/series/481.html for current information.

Average Time Current Curves

1000

100

0.1

0.01

10001001010.1

18/100 A

1/4 A

1/2 A

65/100 A

3/4 A

1 A

1 1/3 A

2 A

3 A

4 A

5 A

7 1/2 A

10 A

12 A

15 A

20 A

TIME IN SECONDS

CURRENT IN AMPERES

Material

#PEZ1PMZQIFOZMFOF4VMåEF6-70

5FSNJOBUJPOT#FSZMMJVN$PQQFS5JO1MBUFE

0QUJPOBM-FOT/ZMPO

Vibration 1FS.*-45%'

Product CharacteristicsProduct Characteristics

Dimensions

Part Numbering System

"'VTFIPMEFSNVTUCFVTFE'VTFJTLFZFE

UPQSFWFOUJOTFSUJPOJOMPXFSSBUFEIPMEFST

"'VTFIPMEFSJTEFTJHOFEUPBDDFQUBMM

SBUJOHTVQUPBNQFSFT

22.9mm

(.90") MIN.

23")

5.3

(.21")

16.9

(.665") MAX.

11. 7

(.46")

17.8

mm (.70")

19.6

(.77")

21.3mm

(0.84")

REF.

LENS

2.77

(.109")

2.79

(.110")

4.45

(.175")

1-15A 20A*

Operating Temperature – 55

$UP

$

Thermal Shock

8JUITUBOETDZDMFTPGo

$UP

125

Insulation Resistance

(After Opening)

(SFBUFSUIBOPINT

OPTION CODE:

RoHS ITEM OPTION CODE:

SERIES

AMP CODE

QUANTITY CODE:

Blank = Standard

XL = Protective Lens

Blank = Standard design item

P = RoHS compliant version item

(available in 2-20 amp range only)

0481 .180 H XL P

V = 5 pack

H = 100 pack

(See Electrical Characteristics Table)

Part #	0481.500HXL
Description	Fuse Alarm Indicating 0.5A 125V Holder 17.8 X 8 X 19.6mm P
Category	FUSE
Availability	In Stock
Qty	6775

Qty	Price
1 - 108	$2.30186
109 - 273	$1.83102
274 - 579	$1.72639
580 - 1,246	$1.60432
1,247 +	$1.42994

Manufacturer	Available	Qty
LITTELFUSE TRACOR	Freelance Stock: 75 Ships Immediately
Littelfuse Date Code: 0122	Freelance Stock: 100 Ships Immediately
Littelfuse	Freelance Stock: 300 Ships Immediately
Littelfuse Date Code: 0103	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 0103	Freelance Stock: 300 Ships Immediately
Littelfuse	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 9821	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 9813	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 9817	Freelance Stock: 100 Ships Immediately
Littelfuse	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 9806	Freelance Stock: 100 Ships Immediately
Littelfuse	Freelance Stock: 100 Ships Immediately
Littelfuse Date Code: 0107	Freelance Stock: 200 Ships Immediately
Littelfuse	Freelance Stock: 5000 Ships Immediately

0481.500HXL

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