Fuse 312 and 318 Datasheet

Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
312/318 Series Lead-Free 3AG, Fast-Acting Fuse
RoHS
Pb
PS
E
Description
The 3AG Fast-Acting Fuse solves a broad range
of application requirements while offering reliable
performance and cost-effective circuit protection.
Features
• RoHS compliant and
Lead-free
• In accordance with UL
Standard 248-14
• Available in cartridge
and axial lead format
and with various forming
dimensions
Agency Approvals
Agency
PS
E
Agency File Number
Ampere Range
E10480
312 Series: 0.062A - 30A
318 Series: 0.062A - 10A
Applications
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
29862
312 Series: 0.062A - 30A
318 Series: 0.062A - 10A
NBK040205-E10480B/F
NBK040205-E10480D/H
312/318 Series 1A-5A
312/318 Series 6A-10A
E10480
318 Series: 12A - 30A
SU05001-6008
SU05001-5005
SU05001-5006
312/318 Series: 1-2A
312/318 Series: 3-6A
312/318 Series: 7-10A
N/A
312 Series: 0.062A - 10A
318 Series: 0.062A - 10A
200%
Electrical Characteristics for Series
% of Ampere
Rating
Ampere Rating
Opening Time
100%
0.062A – 35A
4 hours, Minimum
135%
0.062A – 35A
1 hour, Maximum
0.062A – 10A
5 sec., Maximum
12A – 30A
10 sec., Maximum
35A
20 sec., Maximum
Additional Information
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice. Application testing is strongly recommended.
Revised: 08/10/15
Datasheet
312 Series
Resources
312 Series
Samples
312 Series
Datasheet
318 Series
Resources
318 Series
Samples
318 Series
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
Electrical Characteristic Specifications by Item
Amp
Code
Ampere
Rating (A)
Voltage
Rating
(V)
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2 sec)
Agency Approvals
PS
E
.062
0.062
250
24.7000
0.000249
x
x
x
.100
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
.250
0.25
250
.300
0.3
250
.375
0.375
250
0.8250
0.185
x
x
x
.500
0.5
250
0.4980
0.483
x
x
x
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3.0200
0.0165
x
x
x
2.0100
0.0355
x
x
x
1.4050
0.0689
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
0.1385
1.45
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
01.5
1.5
250
0.1036
2.35
x
01.6
1.6
250
0.0934
2.80
x
1.75
1.75
250
0.0856
3.60
x
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01.8
1.8
250
002.
2
250
0.0825
3.85
x
0.0704
5.20
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
x
x
x
x
x
x
x
003.
3
250
0.0427
14.0
x
x
x
x
x
004.
4
250
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
81.0
x
x
x
x
x
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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
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
x
035.
35
32
0.0013
7531
*
[email protected] Vac
**
NOTES:
** For 318 Series 12A to 30A, the agency approval is only cURus.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/10/15
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
.250 A
.375 A
.500 A
.750 A
1A
1.5 A
2A
2.5 A
3A
4A
5A
6A
7A
8A
10 A
1000
.125 A
Average Time Current Curves
.062 A
Temperature Re-rating Curve
TIME IN SECONDS
100
10
1
0.1
Note:
Rerating depicted in this curve is in addition to the standard derating of 25%
for continuous operation.
0.01
0.005 0.01
1
0.1
CURRENT IN AMPERES
10
100
Please contact Littelfuse for more details on those T-C Curves of other ampere
ratings which are not published.
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
Wave Parameter
260
240
Lead-Free Recommendation
Preheat:
220
(Depends on Flux Activation Temperature)
200
180
160
140
120
100
80
60
(Typical Industry Recommendation)
Temperature Minimum:
100°C
Temperature Maximum:
Preheat Time:
150°C
60-180 seconds
Solder Pot Temperature:
260°C Maximum
Solder Dwell Time:
2-5 seconds
40
Recommended Hand-Solder Parameters:
Time (Seconds)
Cooling Time
Preheat Time
Dwell Time
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/10/15
240
230
220
210
200
190
180
170
160
150
140
130
120
110
90
100
80
70
60
50
40
30
0
0
20
20
10
Temperature (°C) - Measured on bottom side of board
300
Solder Iron Temperature: 350°C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
Product Characteristics
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
Dimensions
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
Measurements displayed in millimeters (inches)
312 000 Series
(cartridge)
0312 xxxx M X P
318 000 Series
(axial leaded)
6.35±0.3
(.25")
Series
6.985±0.3
(.275")
31.75±1.12
(1.25")
32.72±1.12
(1.288")
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
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Quantity Code
M = 1000
Packaging Code
X = Filler
Lead-free
Packaging
Packaging Specification
Quantity
Quantity &
Packaging Code
Taping Width
Bulk
N/A
1000
MX
N/A
Bulk
N/A
100
HX
N/A
Bulk
N/A
1000
MX
N/A
Packaging Option
312 Series
318 Series
Bulk
N/A
100
HX
N/A
Bulk
N/A
1000
MXB
N/A
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/10/15