LM317LITP/NOPB - NATIONAL SEMICONDUCTOR

Speciﬁcations are subject to change without notice.

Revised: 06/06/18

Axial Lead & Cartridge Fuses

3AG > Fast Acting > 312/318 Series

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 0.062A - 25A

29862 312 Series: 0.062A - 30A

318 Series: 0.062A - 10A

(312 Series)

NBK040205-E10480B

NBK040205-E10480F

1A - 5A

6A - 10A

(318 Series)

NBK040205-E10480D

NBK040205-E10480H

1A - 5A

6A - 10A

E10480 318 Series: 12A - 30A

SU05001-6008

SU05001-5005

SU05001-5006

1A - 2A

3A - 6A

7A - 10A

N/A 0.062A - 10A

Features

Electrical Characteristics for Series

Applications

% of Ampere

Rating Ampere Rating Opening Time

100% 0.062A – 35A 4 hours, Minimum

135% 0.062A – 35A 1 hour, Maximum

200%

0.062A – 10A 5 sec., Maximum

12A – 30A 10 sec., Maximum

35A 20 sec., Maximum

RoHS

• In accordance with UL

Standard 248-14

• Available in cartridge

and axial lead format

and with various forming

dimensions

• RoHS compliant and

Lead-free

Used as supplementary protection in appliance or

utilization equipment to provide individual protection for

components or internal circuits.

Description

Application testing is strongly recommended.

Additional Information

Datasheet Samples

Resources

Datasheet Samples

Resources

312 Series

318 Series

312 Series

318 Series

312 Series 312 & 318 Series

318 Series

Accessories

For recommended fuse accessories for this product series,

see ‘Recommended Accessories’ section.

Speciﬁcations are subject to change without notice.

Revised: 06/06/18

Axial Lead & Cartridge Fuses

3AG > Fast Acting > 312/318 Series

Amp

Code

Ampere

Rating (A)

Voltage

Rating

(V)

Interrupting

Rating

Nominal

Cold

Resistance

(Ohms)

Nominal

Melting

I2t (A2 sec)

Agency Approvals

.062 0.062 250

35A@250Vac

10KA@125Vac

24.7000 0.000249 x x x

.10 0 0.1 250 11.2800 0.00171 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

0 01. 1 250 0.1900 0.760 x x x x x

1.25 1.25 250

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

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

0 0 7. 7 250 0.0146 81.0 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

300A@32 Vac

0.0072 234.6 x x** x

015. 15 32 0.0052 490.5 x x** x

020. 20 32 0.0035 1414 x x** x

025. 25 32 0.0024 2041 x x** x

030. 30 32 0.0019 3717 x** x

035. 35 32 0.0013 7531

NOTES:

** For 318 Series 12A to 30A, the agency approval is only cURus.

Electrical Characteristic Speciﬁcations by Item

Speciﬁcations are subject to change without notice.

Revised: 06/06/18

Axial Lead & Cartridge Fuses

3AG > Fast Acting > 312/318 Series

Average Time Current Curves

1000

10 0

0.1

0.01

110 10 0

0.01 0.1

.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 Re-rating 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) (Typical Industry Recommendation)

Temperature Minimum: 100°C

Temperature Maximum: 150°C

Preheat Time: 60-180 seconds

Solder Pot Temperature: 260°C Maximum

Solder Dwell Time: 2-5 seconds

Recommended Hand-Solder Parameters:

Solder Iron Temperature: 350°C +/- 5°C

Heating Time: 5 seconds max.

Note: These devices are not recommended for IR or

Convection Reﬂow process.

Recommended Process Parameters:

Please contact Littelfuse for more details on those T-C Curves of other ampere

ratings which are not published.

Note:

Rerating depicted in this curve is in addition to the industry practice derating

of 25% for continuous operation.

Speciﬁcations are subject to change without notice.

Revised: 06/06/18

Axial Lead & Cartridge Fuses

3AG > Fast Acting > 312/318 Series

312 000 Series

(cartridge)

318 000 Series

(axial leaded)

6.35±0.3

(.25")

32.72±1.12

(1.288")

31.75±1.12

(1.25")

6.985±0.3

(.275")

Axial Lead Diameter:

0.81±0.05 (.032")

Axial Lead Material:

Tin-coated copper

Axial Lead Length:

Standard Length:

39.68 (1.56") TYP.

Short Lead Option:

12.70 (0.50”) TYP

Product Characteristics

Packaging

Materials

Body: Glass

Cap: Nickel–plated brass

Leads: Tin–plated Copper

Terminal Strength MIL-STD-202, Method 211,

Test Condition A

Solderability MIL-STD-202 method 208

Product Marking

Cap1: Brand logo, current and voltage

ratings

Cap2: Series and agency approval

marks

Operating

Temperature –55ºC to +125ºC

Thermal

Shock

MIL-STD-202, Method 107, Test Condition B: (5

cycles -65°C to +125°C)

Vibration MIL-STD-202, Method 201

Humidity

MIL-STD-202, Method 103,

Test Condition A: High RH (95%),

and Elevated temperature (40°C) for 240 hours

Salt Spray MIL-STD-202, Method 101,

Test Condition B

Part Numbering System

0312 MX Pxxxx

Lead-free

Packaging Code

Quantity Code

Amp Code

Series

X = Filler

M = 1000

Refer to Amp Code column of

Electrical Characteristics Table

312 = Cartridge

318 = Axial Leaded

Dimensions

Measurements displayed in millimeters (inches)

Packaging Option Packaging Speciﬁcation Quantity Quantity &

Packaging Code Taping Width

312 Series

Bulk N/A 1000 MX N/A

Bulk N/A 100 HX N/A

318 Series

Bulk N/A 1000 MX N/A

Bulk N/A 100 HX N/A

Bulk N/A 1000 MXB N/A

Speciﬁcations are subject to change without notice.

Revised: 06/06/18

Axial Lead & Cartridge Fuses

3AG > Fast Acting > 312/318 Series

Recommended Accessories

Accessory

Type Series Description

Max

Application

Voltage

Max

Application

Amperage

Holder

155100 Twist-Lock In-Line Fuseholder 32 20

342 Traditional Panel Mount Fuseholder 250 20

346 Panel Mount Flip-Top Shock-Safe Fuseholder 250 15

345 Shock-Safe Fuseholder with PC Mount, Solder Mount and Panel Mount options 250 20

Block 354 Low Proﬁle OMNI-BLOK® Fuse Block 600 30

359 High Current Screw Terminal Fuse Block 30

Clip 122 High Current Traditional PC Board Fuse Clip 1000 30

101 Rivet/Eyelet Type Fuse Clip 1000 15

Notes:

1. Do not use in applications above rating.

2. Please refer to fuseholder data sheet for speciﬁc re-rating information.

3. Please contact factory for applications greater than the max voltage and amperage shown.

Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each

product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: