Bussmann
®
Radial Lead Micro Fuse
Quick-Acting (F)
250mA to 5A, 250 Volts AC
PRE
LIMI
A
EFF
NAR
R
Dimensional Data
Y DA
TA
S
V
DE
A
V
DE
S
T500MA 250V
BU
S
S F
US
E
B
E
LEAD
C
CATALOG SYMBOL: EFF
RADIAL LEAD MICRO FUSE
250mA TO 5A
250 VOLTS AC
QUICK-ACTING (F)
DESCRIPTION:
Fuses are quick-acting, radial leaded
micro fuses in accordance with the specif-
cations of IEC127-3, standard sheet 3
(Type F).
PACKAGING:
Fuses can be provided:
1. in Bulk (short lead only) or
2. on tape in standard ammo-pack boxes,
to IEC 286-2.
WEIGHT:
573 grams per 1000.
D
F
Short Lead
Long Lead
Dimensions
mm (inches)
Short Lead
A
B
C
D
E
F
∅
8.35 (.3285)
7.7 (.303)
4.3 (.1695)
—
0.5 (.0195)
5.0 (.0235)
0.6
Long Lead
8.35 (.3285)
7.7 (.303)
—
18.8 (.74)
0.5 (.197)
5.0 (.0235)
0.6
Catalog
Number*
EFF250
EFF315
EFF400
EFF500
EFF630
EFF800
EFF1
EFF1.25
EFF1.6
EFF2
EFF2.5
EFF3.15
EFF4
EFF5
Rating
250mA
315mA
400mA
500mA
630mA
800mA
1A
1.25A
1.6A
2A
2.5A
3.15A
4A
5A
Typical mV Drop
Measured at 75%
Normal Ambient
260
250
240
230
110
100
90
87
85
84
82
81
80
78
Melting
I
2
t
2
Sec.
A
0.05
0.08
0.14
0.22
0.17
0.25
0.04
0.66
1
2
3
5
9
15
Rated Current
250mA to 5A
All are 250V AC
150%
Min.
1 hr.
210%
Max.
30 min.
275%
Min.
10 ms.
Max.
3 sec.
400%
Min.
3 ms.
Max.
300 ms.
1000%
Max.
20 ms.
* Please add the following prefix to the catalog number to denote packaging required:
AP - Ammo-pack taped 1000 per box or,
BK - In bulk 100 per bag (short lead only).
For example: AP/EFF800 for Ammo-pack and BK/EFF800 for Bulk Pack.
Form No. EFF
Page 1 of 2
BIF Doc #4201
Bussmann
rev. 10/14/96
Bussmann
®
Radial Lead Micro Fuse
Quick-Acting (F)
250mA to 5A, 250 Volts AC
Time-Current Characteristics–Total Clear
0.08
0.1
0.125
0.16
0.2
0.25
0.315
0.4
0.5
0.63
0.8
1
1.25
1.6
2
2.5
3.15
4
5
PRE
EFF
LIMI
NAR
R
AMPERE
RATING
Y DA
TA
S
V
DE
100
10
TIME IN SECONDS
1
.1
.01
0.1
1
10
CURRENT IN AMPERES
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design
or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a
product has been selected, it should be tested by the user in all possible applications.
100
.001
Form No. EFF
Page 2 of 2
BIF Doc #4201
Bussmann
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