© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Special Application Fuses
Safe-T-Plus Fuse 259 Series
259 Series Safe-T-Plus Fuse
Please refer to www.littelfuse.com/series/259.html for current information.
259 Series
Safe-T-Plus Fuse 259 Series Baseefa
Description
Agency Approvals
Agency Agency File Number Ampere Range
Baseefa Baseef02ATEX0071U
IECEx BAS 10.0098U 62mA - 1A
E10480 500mA, 750mA
Electrical Characteristics for Series
Features
Applications
% of Ampere
Rating Opening Time
100% 4 Hours, Minimum
200% 5 Seconds, Maximum
t )FSNFUJDBMMZTFBMFE
t
N""SBOHFPQUJPOT
t %FTJHOFEUPPQFSBUF
XJUIJOFOWJSPONFOUT
XIFSFUIFSFJTEBOHFS
PGHBTFYQMPTJPOGSPN
GBVMUZDJSDVJUT
t .FFUDFSUJmDBUJPOGPS
VTFXJUIJOJOUSJOTJDBMMZ
TBGFBQQBSBUVTGPS
BQQMJDBUJPOTTVDIBTHBT
QMBOUTQFUSPDIFNJDBM
and processing
JOEVTUSJFT
Electrical Specifications by Items
4DIFEVMFPGMJNJUBUJPOT
5IFGVTFNVTUCFTPNPVOUFEUIBUDSFFQBHFBOEDMFBSBODFEJTUBODFTBSFOUJNQBJSFEJOBOZXBZ
5IFGVTFJTTVJUBCMFGPSVTFJOJOUSJOTJDBMMZTBGFFRVJQNFOUGPSWPMUBHFTOPUFYDFFEJOH7QFBL
.BYJNVNTVSGBDFUFNQFSBUVSFSJTFBUSBUFEDVSSFOUõN"$"$"$BOE"$
Ampere
Rating
(A)
Amp
Code
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2 Sec.)
Nom
Voltage
Drop
(mV)
Agency Approvals
Baseefa
0.062 .062
"!7"$
"!7%$
7.00 0.00016 2.10 x
0.125 .125 1.70 0.0012 1.30 x
0.250 .250 0.67 0.0095 0.83 x
0.375 .375 0.395 0.025 0.81 x
0.500 .500 0.302 0.0598 0.78 x x
0.750 .750 0.175 0.153 0.23 x x
1.00 1.00 0.128 0.256 0.24 x
3.00 003 0.275 1.27 0.131
5.00 005 0.0158 4.14 0.110
5IF4BGF51MVT4FSJFTPGGFSTBSBOHFPGFODBQTVMBUFE
GVTFTEFTJHOFEUPFOBCMFHSFBUFSTBGFUZGPSPQFSBUJOHFMFDUSPOJD
FRVJQNFOUXJUIJOQPUFOUJBMMZFYQMPTJWFFOWJSPONFOUT0SJHJOBMMZ
EFTJHOFEUPTFSWFUIFOFFETPGHBTQMBOUTQFUSPDIFNJDBMBOE
QSPDFTTJOHJOEVTUSJFTUIFTFGVTFTBSFDFSUJUJGFEGPSVTFXJUIJO
JOUSJOTJDBMMZTBGFBQQBSBUVT"5&Y&/&/
*&$&Y*&$*&$
5IFFODBQTVMBUJPONBUFSJBMJT1PMZBNJEFBUBNJOJNVNEFQUI
PGNNNNUZQJDBMMZBOEIBTB$5*$PNQBSBUJWF5SBDLJOH
*OEFYPGHSFBUFSUIBO5IFMFBETBSFTFQBSBUFECZB
NJOJNVNDMFBSBODFBOEDSFFQBHFEJTUBODFPGNNBOEIFODF
BSFTVJUBCMFGPSVTFJOJOUSJOTJDBMMZTBGFBQQBSUBUVTGPSWPMUBHFOPU
FYDFFEJOH7SNT7QFBL
t 5FTUJOHNFBTVSJOHPS
QSPDFTTJOHFMFDUSPOJD
BOEFMFDUSJDBMFRVJQNFOU
Revised: April 30, 2012
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Special Application Fuses
Safe-T-Plus Fuse 259 Series
259 Series Safe-T-Plus Fuse
Please refer to www.littelfuse.com/series/259.html for current information.
Product Characteristics
Dimensions
(.512")
13mm
(.394")
10mm
(.025")
.635mm
(.315")
8mm
(.197")
5mm
Average Time Current Curves
100
100
10
1
0.1
0.01
0.001
110 1000
0.1
TIME IN SECONDS
CURRENT IN AMPERES
1 A
.750 A
.500 A
3.15 A
5 A
.125 A
.062 A
.375 A
.250 A
Operating Temperature o¡$UP¡$
Thermal Shock 8JUITUBOETDZDMFTPGo¡$UP
125°C
Vibration 1FS.*-45%'
Insulation Resistance
(After Opening) (SFBUFSUIBOPINT
Soldering Parameters
Part Numbering System
0259.062M
SERIES
AMP Code
PACKAGING Code
5IFEPUJTQPJTJUJPOFECFGPSFUIF
1BDLBHJOH4VGmYXJUIXIPMFSBUJOHT
BOEXJUIJOUIFOVNCFSJOHTFRVFODF
GPSGSBDUJPOBMSBUJOHT3FGFSUP"NQ
$PEFDPMVNOJOUIF&MFDUSJDBM4QFDJ-
mDBUJPOTUBCMF
.#VMLQBDLQDT
5#VMLQBDLQDT
Example:
BNQQSPEVDUJT
0259001.M
BNQQSPEVDUTIPXO
Wave Soldering 260°C, 10 seconds max.