Specications are subject to change without notice.

Surface Mount Fuses

461 Series

Surge Resistant > 461 Series TeleLink

Fuse

Please refer to www.littelfuse.com/series/461.html for current information.

461 Series

461 Series TeleLink

Fuse

Description

Agency Approvals

Electrical Characteristics for Series

Features

t 4VSGBDFNPVOUTVSHF

SFTJTUBOU4MP#MP

GVTF

t .FFU6-SE

&EJUJPOQPXFSDSPTT

SFRVJSFNFOUTTUBOEBSE

BMPOF

t %FTJHOFEUPBMMPX

DPNQMJBODFXJUI5FMDPSEJB

(3$03&BOE5*"

"GPSNFSMZ'$$1BSU

4VSHF4QFDJåDBUJPOT

t 1SPWJEFDPPSEJOBUFE

QSPUFDUJPOXJUI-JUUFMGVTF

4*%"$UPS

5SBOTJFOU

7PMUBHF4VQQSFTTPS574

PSB(SFFOUVCF

(BT

1MBTNB"SSFTUPSXJUIPVU

TFSJFTSFTJTUPST

t %FTJHOFEUPTFSWF

UIFSFRVJSFNFOUT

PGBXJEFSBOHFPG

UFMFDPNNVOJDBUJPOBOE

OFUXPSLJOHFRVJQNFOU

t "SBUJOHIBTJNQSPWFE

UFNQFSBUVSFSJTF

QFSGPSNBODFVOEFS"

TVSHFDVSSFOUUFTUJOH

XIFODPNQBSFEXJUI

"SBUJOH

t 1SPEVDUJT)BMPHFO'SFF

BOE3P)4DPNQMJBOUBOE

DPNQBUJCMFXJUIMFBE

GSFFTPMEFSBOEIJHIFS

UFNQFSBUVSFQSPåMFT

XIFOPSEFSFEXJUI

4UBOEBSE4JMWFS1MBUFE

#SBTT$BQT

t 4UBOEBSEQSPEVDUJT

3P)4$PNQMJBOUBOE

DPNQBUJCMFXJUIMFBE

GSFFTPMEFSTBOEIJHIFS

UFNQFSBUVSFQSPåMFT

AGENCY AGENCY FILE NUMBER AMPERE RANGE

E10480 500mA - 2A

LR29862 500mA - 2A

% of Ampere

Rating

Opening Time

 IPVST.JOJNVN

 TFD.JOTFDT.BY

5IF-JUUFMGVTF4FSJFT5FMF-JOL

4VSGBDF.PVOU

4VSHF3FTJTUBOU'VTFPGGFSTPWFSDVSSFOUQSPUFDUJPOGPS

BXJEFSBOHFPGUFMFDPNBQQMJDBUJPOTXJUIPVUSFRVJSJOH

BTFSJFTSFTJTUPS8IFOVTFEJODPOKVODUJPOXJUIB

-JUUFMGVTF4*%"$UPS

5SBOTJFOU7PMUBHF4VQQSFTTPS574

PSB(SFFOUVCF

(BT1MBTNB"SSFTUPSUIJTDPNCJOBUJPO

QSPWJEFTBDPNQMJBOUTPMVUJPOGPSTUBOEBSETBOE

SFDPNNFOEBUJPOTTVDIBT(3o$PSF5*""6-

&/*&$BOE*56,BOE,5IFDPPSEJOBUJPO

SFRVJSFNFOUDPOUBJOFEJO(3o$PSFBOE*56,

NBZSFRVJSFBTFSJFTPGJNQFEBODFEFWJDFT

Applications

t 5&+BOE)%4-

t 4-*$JOUFSGBDFQPSUJPOPG'JCFSUPUIF$VSC'55$BOE

'JCFSUPUIF1SFNJTFT'551

t /PO'JCFS4-*$JOUFSGBDFGPS$FOUSBM0GåDF$0

MPDBUJPOTBOE3FNPUF5FSNJOBMT35

t Y%4-BQQMJDBUJPOTTVDIBT"%4-"%4-7%4-BOE

7%4-

t &UIFSOFU#BTF5

t 1054BQQMJDBUJPOTTVDIBTNPEFNTBOTXFSJOH

NBDIJOFTUFMFQIPOFTGBYNBDIJOFTBOETFDVSJUZ

TZTUFNT

t *4%/i6wJOUFSGBDF

t #BZTUBUJPO5&+5%4USVOLDBSET

Telecom Nano

¥

Fuse Temperature Reading

 ¡$¡'

 ¡$¡'

Maximum Temperature Rise

Higher Currents and PCB layout designs can affect this parameter.

Readings are measured at rated current after temperature stabilizes.

Revised: June 8, 2011

Introduction to Circuit Protection

Transientology

Specications are subject to change without notice.

Surface Mount Fuses

461 Series

Surge Resistant > 461 Series TeleLink

Fuse

Please refer to www.littelfuse.com/series/461.html for current information.

Electrical Specications by Item

Ampere

Rating

(A)

Amp Code

Max

Voltage

Rating

(V)

Interrupting

Rating

Nominal Cold

Resistance (Ohms)

Nominal Melting



t (A

sec)

Agency Approvals

  

"!7"$

"!7%$

 



    



    



*



UJTDBMDVMBUFEBUNTFDTPSMFTT*



UBUUJNFTSBUFEDVSSFOUIBTBUZQJDBMWBMVFPG"



TFD""



TFD""



TFD"

t 5ZQJDBMJOEVDUBODFO)VQUP.)[

t 3FTJTUBODFDIBOHFTGPSFWFSZ¡$

t 3FTJTUBODFJTNFBTVSFEBUSBUFEDVSSFOU

GR 1089 Inter-building requirements

GR 1089 1st level lighting surge inter-building

(Equipment under test can not be damaged and must

continue to operate properly)

Surge

Minimum

Peak

Voltage

(V)

Minimum

Peak

Current

(A)

Max.

Rise/Min.

Decay

(μs)

Repetitions

Each

Polarity

Fuse

Choices

     

     

     

4     

     

GR 1089 2nd level lightning surge telecom port

(Equipment under test shall not become a re or

electrical safety hazard)

Surge

Minimum

Peak

Voltage

(V)

Minimum

Peak

Current (A)

Max.

Rise/Min.

Decay

(μs)

Repe-

titions

Each

Polarity

Fuse

Choices

     

"MUFS

OBUJWF

    

*GTVGåDJFOUTFSJFTSFTJTUBODFJTVTFEUIFOUIFGVTFNBZCFVTFEJOUFTUDPOEJUJPOT

5IFGVTFXJMMPQFOEVSJOHUIFTFUFTUDPOEJUJPOT5IFXJMMOPUPQFOUIVT

QSPWJEJOHPQFSBUJPOBMDPNQMJBODF

Average Time Current Curves

10001001010.1

0.001

0.01

0.1

100

CURRENT IN AMPERES

TIME IN SECONDS

1.25A

.500A

Temperature Rerating Curve

/PUF

 3FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSESFSBUJOHPGGPS

DPOUJOVPVTPQFSBUJPO

Specications are subject to change without notice.

Surface Mount Fuses

461 Series

Surge Resistant > 461 Series TeleLink

Fuse

Please refer to www.littelfuse.com/series/461.html for current information.

461 Series

GR 1089 AC power fault 1st level inter-building (fuse

not allowed to open)

GR 1089 AC power fault 2nd level (fuse can open but

must open in a safe and controlled manner)

Test Vrms

Short

Circuit

Current

(A)

Hits Duration

Primary

Protector

Fuse

Choices

    NJO SFNPWFE 

    NJO SFNPWFE 







  TFD SFNPWFE 

4    TFD PQFSBUJWF 

 %JBHSBN %JBHSBN  TFDT SFNPWFE 

    TFDT SFNPWFE 

    TFDT SFNPWFE 

    TFDT SFNPWFE 

    TFD JOQMBDF 

Test

Circuit

Vrms

Short

Circuit

Current

(A)

Duration Fuse

   NJO 

   TFDT 

   TFDT 

4   NJO 

 %JBHSBN %JBHSBN NJO 

Fuse must open before wiring simulator fuse (MDL 2.0).

Surge Voltage (V) Waveform (μs) Current (A) Repetitions Recommended Fuse

.FUBMMJD"  Y  FBQPMBSJUZ 

-POHJUVEJOBM"  Y  FBQPMBSJUZ 

.FUBMMJD#  Y  FBQPMBSJUZ 

-POHJUVEJOBM#  Y  FBQPMBSJUZ 

TIA –968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events)

UL 60950 requirements

UL60950 (EN 60950) (formerly UL 1950) Power Cross (L

= longitudinal, M = metallic)

Test

Number

Voltage (V) Current (A) Time

Fuse

Choices

-   TFDT 

-   TFDT 

-   NJO 

-   NJO 

-   NJO 

.   TFDT 

.   TFDT 

.   NJO 

.   NJO 

4election of test number depends on current limiting F re enclosure/spacing of end product

t "8(MJOFDPSESFNPWFT-.UFTUSFRVJSFNFOU

t -DPOEVDUFEPOMZJGQSPEVDUEPFTOPUQBTTTFDUJPO

t -.-.-.DPOEVDUFEJGOPUJOBåSFFODMPTVSF

Fuse must open before the wiring simulator fuse (MDL 2.0).

UL60950 (EN 60950) (formerly UL 1950) Impulse Test and Steady-State Electric Strength Test

Test Voltage (V) Current (A) Waveform Repetitions Fuse Choices

Impulse

'PSIBOEIFMEVOJUT   YNT XTFDTSFTU 

/POIBOEIFME   YNT XTFDTSFTU 

Steady-State

'PSIBOEIFMEVOJUT  )[ 

/POIBOEIFME  )[ 

'PSUIFUZQF"FWFOUTUIFGVTFXJMMPQFOQSPWJEJOHOPOPQFSBUJPOBMDPNQMJBODF5IFXJMMOPUPQFOQSPWJEJOHGPSPQFSBUJPOBMDPNQMJBODFXJUI5*""UZQF"TVSHFFWFOUT

1.25A

3.12

(.123")

3.12

(.123")

10.10

(.397")

3.25

(.128")

3.43

(.135")

12.6

(.496")

6.10

(.240")

Recommended Pad Layout

1.70 typ

(.067")

Dimensions

Part #	04611.25ER
Description	FUSE 1.25A 600V TELELINK NANO2
Category	FUSE
Availability	In Stock
Qty	880

Qty	Price
1 - 184	$1.19271
185 - 369	$0.94875
370 - 554	$0.89453
555 - 739	$0.83128
740 +	$0.74093

04611.25ER

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Technical Document