Ferrule fuse-links 8x31 aM 400VAC
IEC Cylindrical Fuse-Links
Mersen aM and gG fuse-links cover a wide range of physical sizes and ampere
ratings for 400, 500, and 690VAC for protection in electrical distribution circuits
and various industrial applications. Most ratings are available in size 8x31 and size
10x38 with an optional indicator, and in size 14x51 and 22x58 with an optional
striker to activate an auxiliary contact. All cylindrical fuse-links have ceramic bodies
and silver-plated ferrules.
Cylindrical fuse-links “aM” are partial range fuses. They protect electrical devices in
case of unacceptable high short-circuit against destruction due high current limiting
and low thermal let-through values. They cut off currents more than 6.3xln until the
maximum breaking capacity (rated breaking capacity). Cylindrical fuse-links “aM”
are mainly used for the protection of installation switch gear in otor circuit currents.
For classification of the cylindrical fuse-links the nominal current of the fuse-link can
be selected respective to the nominal current of the motor.
Our technology and process was designed to ensure highly reliable technical
performance.
Features Benefits
zz S
mall size
zz V
isual blown fuse indication
zz Safest and most reliable protection system
Applications
zz a
M type for protection of motors, transformers and other loads with in-rush currents.
Standards
IEC 60269-1 & -2
Voltage AC
400 VAC
Ampere Range (A)
1 ... 12 A
Speed/Characteristic aM
I.R. AC (kA)
20 kA
Body Material
Ceramic
Contact Materials
Silver plated copper
Product Size
8x31 mm
Low Voltage IEC Fuses / / DS-LFCY8AM-04-0715_EN
www.ep.mersen.com
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet.
Technical data overview
1
Ferrule fuse-links 8x31 aM 400VAC
Product range
Catalog
number
Reference Rated voltage AC
number
(IEC)
Rated current In
Rated breaking
capacity AC
Power dissipation
at In
Weight
FR8AM40V1
C217168
1 A
20 kA
0.09 W
4.4 g
400 V
FR8AM40V2
R218193
400 V
2 A
20 kA
0.15 W
4.4 g
FR8AM40V4
S219229
400 V
4 A
20 kA
0.26 W
4.4 g
FR8AM40V6
C222205
400 V
6 A
20 kA
0.35 W
4.4 g
FR8AM40V8
F200749
400 V
8 A
20 kA
0.47 W
4.4 g
FR8AM40V10 W201292
400 V
10 A
20 kA
0.55 W
4.4 g
FR8AM40V12 V1007188
400 V
12 A
20 kA
0.7 W
4.4 g
Low Voltage IEC Fuses / / DS-LFCY8AM-04-0715_EN
www.ep.mersen.com
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet.
Size 8,5x31,5 400VAC without indicator
2
Ferrule fuse-links 8x31 aM 400VAC
Time current characteristic curves
Size 8x32 400V aM
100
70
50
Actual pre-arcing time (s)
30
1A
20
10
2A
7
5
3
4A
2
1
6A
0.7
0.5
0.3
8A
0.2
0.1
10 A
0.07
0.05
0.03
12 A
0.02
0.01
0.005
0.003
0.002
0.001
0.0007
0.0005
0.0003
RMS value of prearc current (A) +/- 8%
Low Voltage IEC Fuses / / DS-LFCY8AM-04-0715_EN
www.ep.mersen.com
2000
1000
700
500
300
200
100
70
50
30
20
10
7
5
3
1
0.0001
2
0.0002
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet.
0.007
3
Ferrule fuse-links 8x31 aM 400VAC
Current limiting diagram
Size 8x32 400V aM
5000
3000
12 A
lm = 2.3 lp
Maximum peak let thru current (Ic)(A)
2000
10 A
8A
6A
1000
4A
700
2A
500
1A
300
200
100
100000
70000
50000
30000
20000
10000
7000
5000
3000
2000
700
500
300
200
100
70
50
30
20
50
10
70
50 Hz RMS symetrical prospective current (Ip)(A)
Size 8x32 400V aM
1000
400V
230V
700
Rated current (A)
500
pre-arcing I²t
300
200
100
70
50
30
20
10
Pre-arcing and clearing I²t (A²s)
Low Voltage IEC Fuses / / DS-LFCY8AM-04-0715_EN
www.ep.mersen.com
12
8
6
4
2
1
5
10
7
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet.
Pre-arcing and operating I2t characteristics
4
Ferrule fuse-links 8x31 aM 400VAC
Dimensions
(1001204)
6.3
Size 8x31 aM without indicator
+0.2
0
6.3
31.5 ± 0.5
Ø 8.4
Low Voltage IEC Fuses / / DS-LFCY8AM-04-0715_EN
www.ep.mersen.com
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet.
Dimensions in mm
5