050912
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1,65
2,8 –0,1
1,65
10 -0,5
cURus
Type (I) 100% x I

250% x I

500 mA ... 2.00 A > 4 h 1 ... 120 s
SURFACE MOUNT TELECOM PROTECTORS
Dimensions (mm)
Operating Conditions
Order Qty. Order- Series Type Code Packaging
Information Number 457
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:
www.wickmanngroup.com
Further application info see fuseology:
www.wickmanngroup.com/download/
fuseology.pdf
No. 457 Lead Free
Pad Layout
Chip Size 10030
Specifications
Packaging
000: 2500 pcs./330mm reel (Blister Tape)
001: 500 pcs./178mm reel (Blister Tape)
Tape width 16mm
Materials
Housing: Ceramic tube
Element: Wire
Terminals: 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)
Minimum Cross Section, Copper
Conducting path - 0.175 mm
2
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.)
Lightning Surge Specifications
Specifications are subject
to change without notice
Electrical Specifications
Surge Specification Surge Repetitions Waveform ( µsec.) Current (A) Voltage (V) Performance Requirement
FCC 47 Part 68 Logitudinal Type A 2 10x160 70A 1500 Fuse cannot open
FCC 47 Part 68 Metallic Type A 2 10x560 45A 800 Fuse cannot open
Telcordia GR-1089-CORE First Level Lightning 50 10x1000 30A 1000 Fuse cannot open
FCC 47 Part 68 Longitudinal Type A 2 10x160 160 1500 Fuse cannot open
FCC 47 Part 68 Metallic Type A 2 10x560 115 800 Fuse cannot open
Telcordia GR-1089-CORE First Level Lightning 50 10x1000 100 1.000 Fuse cannot open
Telcordia GR-1089-CORE First Level Lighting 50 2x10 500 2.500 Fuse cannot open
0500 tested
1250 and 1251 tested
Type Code Current Voltage Rating Interrupting Rating Voltage Drop Cold Resistance Melting Integral Approvals
AC 250VAC 600VAC 1.0 x I
N
0.1 x I
N
10 x I
N
50/60 Hz cosϕ=1
max. (mV) max. (mΩ) typ. (A
2
s)
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 •
UL 60950 3rd Edition *
Telcordia1089 (2nd Level) *
Type Test M1 Test M2 Test M3 Test M3 Test 1 Test 2 Test 3 Test 4
Code 600V/1.5s 600V/5s 600V/30min Max. ∆ T (ºC) 277V/15min 600V/5s 600V/5s 600V/15min
AC Power Fault Ratings • Permissible continuous operating current is ≤ 80 % at ambient temperature of 23 ºC (73.4 ºF)
0500 40A 7A 2.2A -- 25A 60A 7A 2.2A
1250 40A 7A 2.2A 120 25A 60A 7A 2.2A
1251 40A 7A 2.2A 50 25A 60A 7A 2.2A
* UL60950 3rd edition and Telcordia 1089 (2nd Level) are device standards, which require a testing of the complete device.
This product is not recommended
for new designs. Please refer to
Littelfuse No. 461.