S
URFACE
M
OUNT
T
ELECOM
P
ROTECTORS
This product is not recommended
for new designs. Please refer to
Littelfuse No. 461.
No. 457 Lead Free
Tube
Telecom Tube Protector
Telecom
Overcurrent Protection for Telecom Equipment
Time-Current Characteristic
Transient Tolerant
Specifications
Packaging
000: 2500 pcs./330mm reel (Blister Tape)
001: 500 pcs./178mm reel (Blister Tape)
Tape width 16mm
Housing:
Element:
Terminals:
Ceramic tube
Wire
Copper, nickel & silver plated
Applicable Standards
UL-248-14
UL 60950 3rd Edition *
Telcordia GR-1089 *
FCC 47 CFR Part 68
cULus Recognized
Materials
Approvals
Temperature
Operating Temperature
Test
Climatic Test
-40 ºC to +125 ºC (consider de-rating)
Damp heat, steady state
40 ºC/ 93%/ 21 days (IEC 60068-1,-2-1,-2-2,-2-78)
+10 ºC to +60 ºC
relative humidity
≤
75 % yearly average,
without dew, maximum value for 30 days - 95 %
240 ºC, 30 s (Reflow)
Dimensions (mm)
10 -0,5
Features
Surge proof for telecom line applications
No need for series resistors (1.25A & 2.00A)
Reduced PCB space requirements
Lead-free construction
Flame resistant ceramic housing
Irreversible physical separation under fault
Highly defined cut-off times
Low internal resistance minimizes line losses
For Reflow Soldering or Soldering Iron
2,8 –0,1
Stock Conditions
1,65
Chip Size 10030
1,65
Recommended
Solderability
soldering
Pad Layout
W ebLinks
Further info see:
www.wickmanngroup.com
acc. to IEC 60068-2-58
235 °C, 2 s
260 ºC, 10 s (IEC 60068-2-58)
280 ºC, 5 s (IEC 60068-2-58)
Soldering Heat Resistance
Minimum Cross Section, Copper
Conducting path - 0.175 mm
2
Path thickness - 0.035 mm
Further application info see fuseology:
www.wickmanngroup.com/download/
fuseology.pdf
Mounting
Operating Conditions
Type (I)
500 mA ... 2.00 A
Avoid circuit traces below the Fuse.
Fuse should not be enclosed in potting
materials.
Logo, Current Rating
0.25 g (approx.)
Marking
250% x I
1 ... 120 s
100% x I
>4h
Unit Weight
AC Power Fault Ratings • Permissible continuous operating current is
≤
80 % at ambient temperature of 23 ºC (73.4 ºF)
UL 60950 3rd Edition *
Telcordia1089 (2nd Level) *
Type
Test M1
Test M2
Test M3
Test M3
Test 1
Test 2
Test 3
Test 4
277V/15min
600V/5s
600V/5s
600V/15min
Code
600V/1.5s
600V/5s
600V/30min Max.
∆
T (
º
C)
0500
1250
1251
40A
40A
40A
7A
7A
7A
2.2A
2.2A
2.2A
--
120
50
25A
25A
25A
60A
60A
60A
7A
7A
7A
2.2A
2.2A
2.2A
Lightning Surge Specifications
Surge Specification
Surge
FCC 47 Part 68
FCC 47 Part 68
Telcordia GR-1089-CORE
FCC 47 Part 68
FCC 47 Part 68
Telcordia GR-1089-CORE
Telcordia GR-1089-CORE
Type Code
Current
Logitudinal Type A
Metallic Type A
First Level Lightning
Longitudinal Type A
Metallic Type A
First Level Lightning
First Level Lighting
Voltage Rating
AC
Repetitions Waveform (
µ
sec.) Current (A)
0500 tested
2
2
50
10x160
10x560
10x1000
70A
45A
30A
160
115
100
500
Voltage (V)
1500
800
1000
1500
800
1.000
2.500
Performance Requirement
Fuse cannot open
Fuse cannot open
Fuse cannot open
Fuse
Fuse
Fuse
Fuse
cannot
cannot
cannot
cannot
open
open
open
open
1250 and 1251 tested
2
2
50
50
10x160
10x560
10x1000
2x10
Electrical Specifications
0500
500mA
1250
1.25A
1251
2.00A
* UL60950 3rd edition
Interrupting Rating
Voltage Drop
Cold Resistance
Melting Integral Approvals
250VAC
600VAC
1.0 x I
N
0.1 x I
N
10 x I
N
50/60 Hz
cosϕ=1
max. (mV)
max. (m
Ω
)
typ. (A
2
s)
250V
50A
60A
450
640
2
•
250V
50A
60A
250
150
16
•
250V
50A
60A
375
115
18
•
Telcordia
a nd Telcordia 1089 (2nd Level) are device standards, which require a testing of the complete device.
Order
Information
050912
Qty.
Order-
Number
Series
457
Type Code
Packaging
Specifications are subject
to change without notice
China
Tel: +86 21 6432 5146
E-mail: sales@wickmann.cn
WebSite
Europe
Tel: +49 2302 662-107
www.wickmanngroup.com E-mail: sales@wickmann.com
Americas
Tel: +1 404 699-7820
E-mail: service@wickmannusa.com
Asia
Tel: +852 26 14-1108
E-mail: sales@wickmann.com.hk
cURus
S
URFACE
M
OUNT
T
ELECOM
P
ROTECTORS
TTP / No. 457
0
0,0
10
0
A
BC
I-t Characteristics
A)
457-0500
B)
457-1250
C)
457-1251
Time (sec.)
050912
WebSite
Europe
Tel: +49 2302 662-107
www.wickmanngroup.com E-mail: sales@wickmann.com
0
,00
10
1,0
00
0
10
10
1
0.1
0.0
1
0
0.0
1
Subject to change without notice. To ensure
compliance with respective telecom standards,
the 457 shall be tested in the actual application.
5
0.5
1
2
5
10
2
5
100
2
5
1000
I
Fault
(Amps)
Americas
Tel: +1 404 699-7820
E-mail: service@wickmannusa.com
Asia
Tel: +852 26 14-1108
E-mail: sales@wickmann.com.hk
China
Tel: +86 21 6432 5146
E-mail: sales@wickmann.cn
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