457 Datasheet, PDF (1/2 Pages) Littelfuse – SURFACE MOUNT TELECOM PROTECTORS

SURFACE MOUNT TELECOM PROTECTORS
No. 457 Lead Free
This product is not recommended
for new designs. Please refer to
Littelfuse No. 461.
Dimensions (mm)
10 -0,5
1,65
1,65
Chip Size 10030
Pad Layout
Telecom Tube Protector
Overcurrent Protection for Telecom Equipment
Time-Current Characteristic
Transient Tolerant
Applicable Standards
UL-248-14
UL 60950 3rd Edition *
Telcordia GR-1089 *
FCC 47 CFR Part 68
Approvals
cULus Recognized
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
WebLinks
Further info see:
Specifications
Packaging
000: 2500 pcs./330mm reel (Blister Tape)
001: 500 pcs./178mm reel (Blister Tape)
Tape width 16mm
Materials
Housing:
Element:
Terminals:
Ceramic tube
Wire
Copper, nickel & silver plated
Operating Temperature
-40 ºC to +125 ºC (consider de-rating)
Climatic Test
Damp heat, steady state
40 ºC/ 93%/ 21 days (IEC 60068-1,-2-1,-2-2,-2-78)
Stock Conditions
+10 ºC to +60 ºC
relative humidity ≤ 75 % yearly average,
without dew, maximum value for 30 days - 95 %
Recommended soldering
240 ºC, 30 s (Reflow)
Solderability
acc. to IEC 60068-2-58
235 °C, 2 s
Soldering Heat Resistance
260 ºC, 10 s (IEC 60068-2-58)
280 ºC, 5 s (IEC 60068-2-58)
Operating Conditions
Type (I)
100% x I
500 mA ... 2.00 A
>4h
www.wickmanngroup.com
Further application info see fuseology:
www.wickmanngroup.com/download/
fuseology.pdf
250% x I
1 ... 120 s
Minimum Cross Section, Copper
Conducting path - 0.175 mm²
Path thickness - 0.035 mm
Mounting
Avoid circuit traces below the Fuse.
Fuse should not be enclosed in potting
materials.
Marking
Logo, Current Rating
Unit Weight
0.25 g (approx.)
AC Power Fault Ratings • Permissible continuous operating current is ≤ 80 % at ambient temperature of 23 ºC (73.4 ºF)
Type
Test M1
Code 600V/1.5s
UL 60950 3rd Edition *
Test M2
600V/5s
Test M3
600V/30min
Test M3
Max. ∆ T (ºC)
Test 1
277V/15min
Telcordia1089 (2nd Level) *
Test 2
Test 3
600V/5s
600V/5s
Test 4
600V/15min
0500
40A
7A
1250
40A
7A
1251
40A
7A
2.2A
--
2.2A
120
2.2A
50
25A
60A
25A
60A
25A
60A
7A
2.2A
7A
2.2A
7A
2.2A
Lightning Surge Specifications
Surge Specification
Surge
Repetitions Waveform ( µsec.) Current (A) Voltage (V)
Performance Requirement
0500 tested
FCC 47 Part 68
Logitudinal Type A
2
10x160
70A
1500
FCC 47 Part 68
Metallic Type A
2
10x560
45A
800
Telcordia GR-1089-CORE First Level Lightning 50
10x1000
30A
1000
Fuse cannot open
Fuse cannot open
Fuse cannot open
FCC 47 Part 68
Longitudinal Type A
2
FCC 47 Part 68
Metallic Type A
2
Telcordia GR-1089-CORE First Level Lightning 50
Telcordia GR-1089-CORE First Level Lighting
50
1250 and 1251 tested
10x160
160
10x560
115
10x1000
100
2x10
500
1500
800
1.000
2.500
Fuse cannot open
Fuse cannot open
Fuse cannot open
Fuse cannot open
Electrical Specifications
Type Code Current Voltage Rating Interrupting Rating
Voltage Drop Cold Resistance Melting Integral Approvals
AC
250VAC 600VAC
50/60 Hz cosϕ=1
1.0 x I_N
max. (mV)
0.1 x
max.
I(_NmΩ)
10 x I_N
typ. (A²s)
0500
500mA
250V
50A
60A
450
640
2
•
1250
1.25A
250V
50A
60A
250
150
16
•
1251
2.00A
250V
50A
60A
375
115
18
•
* UL60950 3rd edition and Telcordia 1089 (2nd Level) are device standards, which require a testing of the complete device.
Order
Information
Qty.
Order-
S e r i e s Type Code Packaging
Number
457
Specifications are subject
to change without notice
WebSite
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