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.
For F1206B and F0805B at -55°C is 107% of rating, at
+25°C 100% of rating, at +85°C 93% of rating, at +125°C
90% of rating. For F0805B 2.50A and 3.00A at +85°C 90%
of rating, at +125°C 90% of rating.
Interrupting rating: 50A.
Insulation resistance: >20MΩ guaranteed (after fusing at rated voltage).
For F0612D at -55°C 107% of rating, at +25°C 100% of rating, at +85°C
80% of rating, at +125°C 75% of rating.
ELECTRICAL SPECIFICATIONS
Operating temperature: -55°C to +125°C
Current carrying capacity:
For F0402E and F0603E at -55°C 107% of rating, at +25°C 100%
of rating, at +125°C 80% of rating. For F0603C at -55°C is 107% of
rating, at +25°C 100% of rating, at +85°C 90% of rating, at +125°C
75% of rating
Type
Part Number
F0402E0R25FSTR
F0402E0R50FSTR
F0402E0R75FSTR
F0402E1R00FSTR
F0402E1R50FSTR
F0402E2R00FSTR
F0603E0R25FSTR
F0603E0R37FSTR
F0603E0R50FSTR
F0603E0R75FSTR
F0603E1R00FSTR
F0603E1R25FSTR
F0603E1R50FSTR
F0603E1R75FSTR
F0603E2R00FSTR
F0603E2R50FSTR
F0603E3R00FSTR
F0603C0R25FWTR
F0603C0R37FWTR
F0603C0R50FWTR
F0603C0R75FWTR
F0603C1R00FWTR
F0603C1R25FWTR
F0603C1R50FWTR
F0603C1R75FWTR
F0603C2R00FWTR
F0603C2R50FWTR
F0603C3R00FWTR
F0805B0R25FW/STR
F0805B0R50FW/STR
F0805B0R75FW/STR
F0805B1R00FW/STR
F0805B1R25FW/STR
F0805B1R50FW/STR
F0805B2R00FW/STR
F0805B2R50FW/STR
F0805B3R00FW/STR
F1206B0R25FW/STR
F1206B0R50FW/STR
F1206B1R00FW/STR
F1206B1R50FW/STR
F1206B2R00FW/STR
F1206B3R00FW/STR
F0612D4R00FWTR
F0612D5R00FWTR
F0402E
F0603E
F0603C
F0805B
F1206B
F0612D
Current
Resistance
Voltage Drop
Fusing Current
Rating 10% x I rated, 25°C @1 x I rated, 25°C
(within 5 sec), 25°C
A
Ω (max.)
mV (max.)
A
0.25
0.650
220
0.625
0.50
0.250
180
1.25
0.75
0.200
180
1.875
1.00
0.130
160
2.50
1.50
0.060
140
3.75
2.00
0.040
120
5.00
0.25
0.650
220
0.625
0.375
0.450
220
0.940
0.50
0.250
180
1.25
0.75
0.200
180
1.875
1.00
0.130
160
2.50
1.25
0.090
140
3.125
1.50
0.060
140
3.75
1.75
0.050
120
4.375
2.00
0.040
120
5.00
2.50
0.035
100
6.25
3.00
0.030
100
7.50
0.25
0.800
280
0.50
0.375
0.500
280
0.75
0.50
0.320
280
1.00
0.75
0.300
280
1.50
1.00
0.200
240
2.00
1.25
0.170
240
2.50
1.50
0.110
240
3.00
1.75
0.090
240
3.50
2.00
0.075
240
4.00
2.50
0.055
200
5.00
3.00
0.045
200
6.00
0.25
0.750
280
0.50
0.50
0.350
280
1.00
0.75
0.270
280
1.50
1.00
0.220
280
2.00
1.25
0.170
280
2.50
1.50
0.120
240
3.00
2.00
0.080
220
4.00
2.50
0.060
220
5.00
3.00
0.050
220
6.00
0.25
0.750
280
0.50
0.50
0.350
280
1.00
1.00
0.180
240
2.00
1.50
0.120
240
3.00
2.00
0.080
220
4.00
3.00
0.050
220
6.00
4.00
0.040
260
10
5.00
0.025
200
12.5
Pre-Arc
I
2
t @ 50A
A
2
-sec
0.00005*
0.0003
0.003
0.008
0.03
0.06
0.00005*
0.0001
0.0003
0.003
0.008
0.01
0.03
0.04
0.06
0.12
0.25
0.00003*
0.0001
0.0002
0.0015
0.004
0.007
0.012
0.02
0.03
0.05
0.1
0.00003*
0.0002
0.001
0.003
0.007
0.010
0.030
0.050
0.10
0.00003
0.0002
0.003
0.010
0.030
0.10
0.10
0.25
Rated
Voltage
V
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
24
24
16
16
63
63
63
63
63
63
63
63
63
63
63
63
63
63
63
32
32
*Current is limited to less than 50A at 32V due to internal fuse resistance.
8
011419
Accu-Guard
®
II
SMD Thin-Film Fuse
ENVIRONMENTAL CHARACTERISTICS
Test
Solderability
Leach Resistance
Conditions
Components completely immersed in a
solder bath at 235 ±5°C for 2 secs.
Completely immersed in a solder bath at
260 ±5°C for 60 secs
12 months minimum with components
stored in “as received” packaging.
Components mounted to a substrate.
A force of 5N applied normal to the line
joining the terminations and in a line
parallel to the substrate
Components mounted to a substrate. 50
cycles -55° to +125°C.
Components mounted to substrate.
50 cycles -55°C to +125°C.
Tested as shown in diagram
3 mm
Deflection
45mm
45mm
Requirement
Terminations to be well tinned
No visible damage
Dissolution of termination
≤ 25% of area
∆R/R<10%
Good solderability
No visible damage
Storage
Shear
Rapid Change of
Temperature
Vibration
Bend
No Visible damage
∆R/R<10%
No Visible damage
∆R/R<10%
No visible damage
∆R/R<10%
Load Life
F0805B, F1206B
25°C, rated current, 20,000 hrs.
No visible damage
∆R/R<10%
9
090518
Special Edition for Assessment Centres
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