153

Cartridge and Axial Lead Fuses

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com for current information.

Revised: July 16, 2008

3AG > Fast Acting > 312/318 Series

312/318 Series

Speciﬁcations are subject to change without notice.

Please refer to http://www.littelfuse.com/series/312.html or 318.html for current information.

312/318 Series Lead-Free 3AG, Fast-Acting Fuse

The 3AG Fast-Acting Fuse solves a broad range

of application requirements while offering reliable

performance and cost-effective circuit protection.

Agency Approvals

Agency Agency File Number Ampere Range

E10480

AU1410

312 Series 10mA - 10A/

318 Series 31mA - 10A

312 Series 12A - 30A

LR 29862

312 Series 10mA - 30A

318 Series 31mA - 10A

NBK040205-

E10480B/F

312/318 Series 1A - 10A

E10480 318 Series 12A - 30A

SU05001-

5005/5006/6005/6008

312/318 Series

1A/ 1.25A / 1.6A/

2A - 10A

312 Series 10mA - 10A

318 Series 31mA - 35A

Features

Electrical Characteristics for Series

Applications

% of Ampere

Rating

Ampere Rating Opening Time

100%

.01 – 35 4 hours, Minimum

135%

.01 – 35 1 hour, Maximum

200%

.01 – 10 5 sec., Maximum

12 – 30 10 sec., Maximum

35 20 sec., Maximum

RoHS

t *OBDDPSEBODFXJUI6-

Standard 248-14

t "WBJMBCMFJODBSUSJEHF

and axial lead format

and with various forming

dimensions

t 3P)4DPNQMJBOUBOE

Lead-free (except 10mA

and 31mA rated items)

Used as supplementary protection in appliance or

utilization equipment to provide individual protection for

components or internal circuits.

Description

154

Cartridge and Axial Lead Fuses

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com for current information.

Revised: July 16, 2008

3AG > Fast Acting > 312/318 Series

312/318 Series

Speciﬁcations are subject to change without notice.

Please refer to http://www.littelfuse.com/series/312.html or 318.html for current information.

Amp

Code

Ampere

Rating (A)

Max

Voltage

Rating

(V)

Interrupting

Rating

Nominal

Cold

Resistance

(Ohms)

Nominal

Melting

t (A

sec)

Agency Approvals

.10

0.01 250

10mA ~ 1A

35A@250Vac

10KA@125Vac

177.4000 NA x

.031

0.031 250 23.6500 0.0000300 x x x

.062 0.062 250 24.7000 0.000249 x x x

.100 0.1 250 11.2800 0.00102 x x x

.125 0.125 250 7.1450 0.00289 x x x

.150 0.15 250 5.1300 0.00550 x x x

.175 0.175 250 3.8750 0.00960 x x x

.187 0.187 250 3.4200 0.0128 x x x

.200 0.2 250 3.0200 0.0165 x x x

.250 0.25 250 2.0100 0.0355 x x x

.300 0.3 250 1.4050 0.0689 x x x

.375 0.375 250 0.8250 0.185 x x x

.500 0.5 250 0.4980 0.483 x x x

.600 .6 250 0.3620 0.880 x x x

.750 0.75 250 0.2445 1.84 x x x

001 1 250 0.1900 0.760 x x x x x

1.25 1.25 250

1.25A ~ 3A

100A@250Vac

10KA@125Vac

0.1385 1.45 x x x x x

01.5 1.5 250 0.1036 2.35 x x x x

01.6 1.6 250 0.0934 2.80 x x x x x

1.75 1.75 250 0.0856 3.60 x x x x

01.8 1.8 250 0.0825 3.85 x x x x

002 2 250 0.0704 5.20 x x x x x

2.25 2.25 250 0.0594 7.20 x x x x x

02.5 2.5 250 0.0513 9.54 x x x x x

003 3 250 0.0427 14.0 x x x x x

004 4 250

4A ~ 10A

200A@250Vac

10KA@125Vac

0.0293 28.5 x x x x x

005 5 250 0.0224 50.0 x x x x x

006 6 250 0.0178 118.0 x x x x x

007 7 250 0.0146 118.0 x x x x x

008 8 250 0.0122 166.0 x x x x x

010 10 250 0.0093 298.0 x x x x x

012 12 32

12A ~ 35A

300A@32 Vac

0.0072 234.6 x

***

015 15 32 0.0052 490.5 x

***

020 20 32 0.0035 1029 x

***

025 25 32 0.0024 2041 x

***

030 30 32 0.0019 3717 x

***

035 35 32 0.0013 7531

NOTES:

N"BOEN"BSFOPU3P)4DPNQPMBJOUBTUIFHMBTTCFBEDPOUBJOT1C

** 312 Series only. Refer to Agency Approvals section of this document.

*** 318 Series only. Refer to Agency Approvals section of this document.

Electrical Characteristic Speciﬁcations by Item

155

Cartridge and Axial Lead Fuses

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com for current information.

Revised: July 16, 2008

3AG > Fast Acting > 312/318 Series

312/318 Series

Speciﬁcations are subject to change without notice.

Please refer to http://www.littelfuse.com/series/312.html or 318.html for current information.

Average Time Current Curves

1000

100

0.1

0.01

100

0.01

0.1

.031 A

.062 A

.125 A

.250 A

.375 A

.500 A

.750 A

1 A

1.5 A

2 A

2.5 A

3 A

4 A

5 A

6 A

7 A

8 A

10 A

0.005

TIME IN SECONDS

CURRENT IN AMPERES

Temperature Rerating Curve

Soldering Parameters - Wave Soldering

Dwell Time

100

120

140

160

180

200

220

240

260

280

300

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

Time (Seconds)

Temperature (°C) - Measured on bottom side of board

Cooling Time

Preheat Time

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature)

5ZQJDBM*OEVTUSZ3FDPNNFOEBUJPO

Temperature Minimum:

100

° C

Temperature Maximum:

150

° C

1SFIFBU5JNF 60-180 seconds

Solder Pot Temperature:

280

° C Maximum

Solder Dwell Time: 2-5 seconds

Recommended Hand-Solder Parameters:

4PMEFS*SPO5FNQFSBUVSF¡$¡$

)FBUJOH5JNFTFDPOETNBY

Note: These devices are not recommended for IR or

Convection Reﬂow process.

Recommended Process Parameters:

Part #	0312.250HXP
Description	FUSE GLASS 250MA 250VAC 3AB 3AG
Category	FUSE
Availability	Out of Stock
Qty	0

0312.250HXP

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Technical Document