1. Interrupting ratings were measured at 70% - 80% power factor on AC, and at a time constant described in U.L. 198L.
2. Voltage drop was measured at 25°C±3°C ambient temperature at rated current.
3. I
2
t was measured at listed interrupting rating and rated voltage.
4. Interrupting rating for MDL ⁄Ω¡§-8A @ 125 Vac is 10,000A. Interrupting rating listed corresponds to maximum rated voltage.
5. Other available sizes include ⁄Ω¡ºº, ⁄Ω£™, ⁄fiΩ¡ºº, ⁄‡fiΩ¡ºº, ›Ω¡º, flΩ¡º, ‡Ω¡º, °Ω¡º, 1¤Ω¡º, 1flΩ¡º, 1°Ω¡º, 2°Ω¡º, 3¤Ω¡º, 3⁄Ω™, 6⁄Ω¢, 7⁄Ω™, 12 and 17⁄Ω™.
6. 1-10A, U.L. Recognized, 125 Vdc and 500 AIC. Other DC ratings are self-certified.
12-21-98
SB98107
Rev. A
Form No. MDL
Page 1 of 2
BIF Doc #2004
Bussmann
®
Time-Delay Glass Fuses
For ⁄Ω¢∑ ≈ 1⁄Ω¢∑ (6.3mm ≈ 32mm)
MDL
MDL-V
1.0 Typical Voltage Drop (At 25° C Ambient Temperature)
2.0
VOLTAGE DROP
1.5
1.0
0.5
0
MDL ⁄Ω¡º
VOLTAGE DROP
MDL ⁄Ω•
MDL ¤¡º
MDL ⁄Ω¢
MDL ‹Ω¡º
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
5%
50%
75%
25%
PERCENT OF RATED CURRENT
100%
0
5%
50%
75%
25%
PERCENT OF RATED CURRENT
100%
MDL ‹Ω•
MDL ⁄Ω™
MDL ‹Ω¢
MDL 1
MDL 1⁄Ω™
.6
VOLTAGE DROP
.5
MDL 2
VOLTAGE DROP
.14
.12
.1
.08
.06
.04
.02
0
5%
50%
75%
25%
PERCENT OF RATED CURRENT
100%
MDL 30
MDL 25
MDL 20
MDL 15
MDL 10
.4
.3
.2
.1
0
5%
50%
75%
25%
PERCENT OF RATED CURRENT
MDL 3
MDL 5
MDL 6
MDL 9
MDL 8
100%
Time-Current Characteristic Curves–Average Melt
(Full Size Curves Available)
⁄Ω¡º
⁄fiΩ¡ºº
⁄Ω•
¤Ω¡º
⁄Ω¢
⁄Ω™
2
3
3.2
4 5
6
8 7
12 10
15
20 25
30
2.0 Ambient Temperature Effect Chart (Derating Curve)
PERCENTAGE OF RATED CURRENT
140
100
AMPERE
RATING
120
10
100
TIME IN SECONDS
80
1
60
-60
-40
-20
0
20
40
60
AMBIENT TEMPERATURE
°C
80
100
.1
CURRENT IN AMPERES
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. 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 con-
tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
