2
Accu-Guard
SMD Thin-Film Fuse
ACCU-GUARD
TECHNOLOGY
The Accu-Guard
series of fuses is based on thin-film tech-
niques. This technology provides a level of control on the
component electrical and physical characteristics that is
generally not possible with standard fuse technologies. This
has allowed AVX to offer a series of devices which are
designed for modern surface mount circuit boards which
require protection.
FEATURES
Accurate current rating
Fast acting
Small-standard 0402, 0603, 0805, 1206 and 0612
chip sizes
Taped and reeled
Completely compatible with all soldering systems
used for SMT
Lead Free Series (F0402E, F0603E)
APPLICATIONS
Cellular Telephones
Two-Way Radios
Computers
Battery Chargers
Rechargeable Battery Packs
Hard Disk Drives
PDA's
LCD Screens
SCSI Interface
Digital Cameras
Video Cameras
APPROVAL FILE NUMBERS
UL, cUL:
RCD#E143842
F
Product
Fuse
1206
Size
See table for
standard sizes
A
Fuse Version
A=Accu-Guard
B=Accu-Guard II
C=Accu-Guard II
0603
D=Accu-Guard II
0612
E=Accu-Guard II
0402, 0603
0R20
Rated Current
Current expressed in
Amps. Letter R
denotes decimal
point. e.g.
0.20A=0R20
1.75A=1R75
F
Fuse Speed
F=Fast
W
Termination
S=Nickel/Lead-
Free Solder
=
coated
(Sn 100)
W=Nickel/solder
=
coated
(Sn 63, Pb 37)
TR
Packaging
TR=Tape and reel
HOW TO ORDER
DIMENSIONS
L
T
B
1
W
B
2
STANDARD SIZES:
millimeters (inches)
F0402E
F0603E
F0603C
F0805B
F1206A/B
F0603D
L
1.000.10
1.600.10
1.650.25
2.10.2
3.10.2
1.650.25
(0.0390.004)
(0.0630.004)
(0.0650.010)
(0.0830.008)
(0.1220.008)
(0.0650.010)
W
0.550.07
0.810.10
0.800.15
1.270.1
1.60.1
3.10.2
(0.0220.003)
(0.0320.004)
(0.0310.006)
(0.0500.004)
(0.0630.004)
(0.1220.008)
T
0.400.10
0.630.10
0.900.2
0.900.2
1.20.2
0.900.2
(0.0160.004)
(0.0250.004)
(0.0350.008)
(0.0350.008)
(0.0470.008)
(0.0360.008)
B
0.200.10
0.350.15
0.350.15
0.300.15
0.430.25
0.350.15
(0.0080.004)
(0.0140.006)
(0.0140.006)
(0.0120.006)
(0.0170.010)
(0.0140.006)
F0603C, F0805B, F1206A and F1206B
DIMENSIONS
B
T
L
W
F0402E and F0603E
7
Accu-Guard
II
SMD Thin-Film Fuse
Accu-Guard
II is a version of Accu-Guard
fuses for a
wider range of current and voltage ratings. Constructed on
alumina substrates, Accu-Guard
II fuses display superior
electrical, mechanical and environmental properties.
Accu-Guard
II dimensions are standard 0402, 0603,
0805, 1206 and 0612 chip sizes, see page 2.
ELECTRICAL SPECIFICATIONS
Operating temperature: -55C to +125C
Current carrying capacity:
For F0402E and F0603E at -55C 107% of rating, at -25C
100% of rating, at +125C 80% of rating. For F0603C at
-55C is 107% of rating, at +25C 100% of rating, at +85C
90% of rating, at +125C 75% of rating.
Current
Resistance
Voltage Drop
Fusing Current
Pre-Arc
Rated
Type
Part Number
Rating
10% x I rated, 25C
@1 x I rated, 25C
(within 5 sec), 25C
I
2
t @ 50A
Voltage
A
(max.)
mV (max.)
A
A
2
-sec
V
F0402E0R25FSTR
0.25
0.650
220
0.625
0.00005*
32
F0402E0R50FSTR
0.50
0.250
180
1.25
0.0003
32
F0402E0R75FSTR
0.75
0.200
180
1.875
0.003
32
F0402E
F0402E1R00FSTR
1.00
0.130
160
2.50
0.008
32
F0402E1R50FSTR
1.50
0.060
140
3.75
0.03
32
F0402E2R00FSTR
2.00
0.040
120
5.00
0.06
32
F0603E0R25FSTR
0.25
0.650
220
0.625
0.00005*
32
F0603E0R37FSTR
0.375
0.450
220
0.940
0.0001
32
F0603E0R50FSTR
0.50
0.250
180
1.25
0.0003
32
F0603E0R75FSTR
0.75
0.200
180
1.875
0.003
32
F0603E1R00FSTR
1.00
0.130
160
2.50
0.008
32
F0603E
F0603E1R25FSTR
1.25
0.090
140
3.125
0.01
32
F0603E1R50FSTR
1.50
0.060
140
3.75
0.03
32
F0603E1R75FSTR
1.75
0.050
120
4.375
0.04
32
F0603E2R00FSTR
2.00
0.040
120
5.00
0.06
32
F0603E2R50FSTR
2.50
0.035
100
6.25
0.12
32
F0603E3R00FSTR
3.00
0.030
100
7.50
0.25
32
F0603C0R25FWTR
0.25
0.800
280
0.50
0.00003*
32
F0603C0R37FWTR
0.375
0.500
280
0.75
0.0001
32
F0603C0R50FWTR
0.50
0.320
280
1.00
0.0002
32
F0603C0R75FWTR
0.75
0.300
280
1.50
0.0015
32
F0603C
F0603C1R00FWTR
1.00
0.200
240
2.00
0.004
32
F0603C1R25FWTR
1.25
0.170
240
2.50
0.007
32
F0603C1R50FWTR
1.50
0.110
240
3.00
0.012
32
F0603C1R75FWTR
1.75
0.090
240
3.50
0.02
24
F0603C2R00FWTR
2.00
0.075
240
4.00
0.03
24
F0603C2R50FWTR
2.50
0.055
200
5.00
0.05
16
F0603C3R00FWTR
3.00
0.045
200
6.00
0.1
16
F0805B0R25FWTR
0.25
0.750
280
0.50
0.00003*
63
F0805B0R50FWTR
0.50
0.350
280
1.00
0.0002
63
F0805B0R75FWTR
0.75
0.270
280
1.50
0.001
63
F0805B
F0805B1R00FWTR
1.00
0.220
280
2.00
0.003
63
F0805B1R25FWTR
1.25
0.170
280
2.50
0.007
63
F0805B1R50FWTR
1.50
0.120
240
3.00
0.010
63
F0805B2R00FWTR
2.00
0.080
220
4.00
0.030
63
F0805B2R50FWTR
2.50
0.060
220
5.00
0.050
63
F0805B3R00FWTR
3.00
0.050
220
6.00
0.10
63
F1206B0R25FWTR
0.25
0.750
280
0.50
0.00003
63
F1206B0R50FWTR
0.50
0.350
280
1.00
0.0002
63
F1206B
F1206B1R00FWTR
1.00
0.180
240
2.00
0.003
63
F1206B1R50FWTR
1.50
0.120
240
3.00
0.010
63
F1206B2R00FWTR
2.00
0.080
220
4.00
0.030
63
F1206B3R00FWTR
3.00
0.050
220
6.00
0.10
63
F0612D
F0612D4R00FWTR
4.00
0.040
260
10
0.10
32
F0612D5R00FWTR
5.00
0.025
200
12.5
0.25
32
For F1206B and F0805B at -55C is 107% of rating, at
+25C 100% of rating, at +85C 93% of rating, at +125C
90% of rating. For F0805B 2.50A and 3.00A at +85C 90%
of rating, at +125C 90% of rating.
Interrupting rating: 50A.
Insulation resistance: >20M
guaranteed (after fusing at
rated voltage).
For F0612D at -55C 107% of rating, at +25C 100% of
rating, at +85C 80% of rating, at +125C 75% of rating.
*Current is limited to less than 50A at 32V due to internal fuse resistance.
8
Accu-Guard
II
SMD Thin-Film Fuse
Test
Conditions
Requirement
Solderability
Components completely immersed in a
Terminations to be well tinned
solder bath at 235 5C for 2 secs.
No visible damage
Leach Resistance
Completely immersed in a solder bath
Dissolution of termination
at 260 5C for 60 secs.
25% of area
R/R<10%
Storage
12 months minimum with components
Good solderability
stored in "as received" packaging.
Shear
Components mounted to a substrate.
No visible damage
A force of 5N applied normal to the
line joining the terminations and in
a line parallel to the substrate.
Rapid Change of
Components mounted to a substrate.
No visible damage
Temperature
50 cycles -55C to +125C.
R/R<10%
Vibration
Per Mil-Std-202F
No visible damage
Method 201A and
R/R<10%
Method 204D Condition D.
Bend
Tested as shown in diagram
No visible damage
R/R<10%
Load Life
25C, rated current, 20,000 hrs.
No visible damage
F0805B, F1206B
R/R<10%
ENVIRONMENTAL CHARACTERISTICS
45mm
45mm
3 mm
Deflection
9
Accu-Guard
II
Lead-Free SMD Thin-Film Fuse
0.1
1
10
100
Current, Amp
Pre-
Arc
Time,
sec
10
-2
10
-1
10
-3
1
10
10
-6
10
-5
10
-4
2.0
A
1.5
A
1.0
A
0.5
A
0.25
A
0.75
A
FUSE TIME CURRENT CHARACTERISTICS
FOR TYPE F0402E (TYPICAL)
10
Accu-Guard
II
Lead-Free SMD Thin-Film Fuse
100
10
1
10
-1
10
-2
10
-3
10
-4
10
-5
10
-6
0
10
20
30
40
50
60
Current, Amp
Pre-
Arc
I
2
t,
A
2
sec
2.0
A
1.5
A
1.0
A
0.5
A
0.2 5
A
0.7 5
A
FUSE PRE-ARC JOULE INTEGRALS VS CURRENT
FOR TYPE F0402E (TYPICAL)
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