Surface Mount Fuses
Surge Resistant > 461E Series Enhanced TeleLink
®
Fuse
461E Series Enhanced TeleLink
®
Fuse
Description
®
®
®
®
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
AMPERE RANGE
1.25 A
Features
®
Fuse.
®
Electrical Characteristics for Series
% of Ampere
Rating
Opening Time
Maximum Temperature Rise
Telecom Nano
2
Fuse
Temperature Reading
Applications
Higher Currents and PCB layout designs can affect this parameter.
Readings are measured at rated current after temperature stabilizes.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461E.html for current information.
89
Revised: May 11, 2010
461E Series
461E Series
Transientology
Surge Resistant > 461E Series Enhanced TeleLink
®
Fuse
Surface Mount Fuses
Introduction to Circuit Protection
Electrical Specifications by Item
Ampere
Rating
(A)
Max
Voltage
Rating
(V)
2
Amp Code
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I
2
t (A
2
sec)
Agency Approvals
2
2
Temperature Rerating Curve
Average Time Current Curves
1.25A
100
10
TIME IN SECONDS
1
0.1
0.01
0.001
0.1
1
10
CURRENT IN AMPERES
100
1000
GR 1089 Inter-Building Requirements
GR 1089 1st level lighting surge inter-building
(Equipment under test can not be damaged and must
continue to operate properly)
Minimum Minimum Max.
Repetitions
Peak
Peak
Rise/Min.
Surge
Each
Voltage
Current
Decay
Polarity
(V)
(A)
(μs)
2
3
4
GR 1089 2nd level lightning surge telecom port
(Equipment under test shall not become a fire or
electrical safety hazard)
Max.
Minimum
Minimum
Rise/Min.
Peak
Surge
Peak
Decay
Voltage
Current (A)
(μs)
(V)
Repe-
titions
Each
Polarity
461E Series
90
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461E.html for current information.
Surface Mount Fuses
Surge Resistant > 461E Series Enhanced TeleLink
®
Fuse
GR 1089 AC power fault 1st level inter-building (fuse
not allowed to open)
Test
Vrms
Short
Circuit
Current (A)
Hits
Duration
Primary
Protector
GR 1089 AC power fault 2nd level (fuse can open but
must open in a safe and controlled manner)
Test
Circuit
Vrms
Short
Circuit
Current
(A)
Duration
2
3
4
2
3
4
2.2
3
2.2
Fuse must open before wiring simulator fuse (MDL 2.0).
TIA –968-A (formerly FCC Part 68) Surge Waveforms (fuse can not open during type B events)
Surge
Voltage (V)
Waveform (μs)
Current (A)
Reps
UL 60950 requirements
UL60950 (EN 60950) (formerly UL 1950) Power Cross
(L = longitudinal, M = metallic)
Dimensions
10.10
(.397")
F
L 1.25A
3.25
(.128")
3.12
(.123")
6.10
(.240")
12.6
(.496")
1.70 typ
(.067")
Recommended Pad Layout
3.43
(.135")
Test
Number
Voltage (V) Current (A)
Time
2.2
2.2
3.12
(.123")
2.2
2.2
election of test number depends on current limiting F fire enclosure/spacing of end product
Fuse must open before the wiring simulator fuse (MDL 2.0).
UL60950 (EN 60950) (formerly UL 1950) Impulse Test and Steady-State Electric Strength Test
Test
Impulse
Voltage (V)
Current (A)
Waveform
Repetitions
Steady-State
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461E.html for current information.
91
461E Series
461E Series
Transientology
Surge Resistant > 461E Series Enhanced TeleLink
®
Fuse
Surface Mount Fuses
Introduction to Circuit Protection
Soldering Parameters
t
P
Ramp-up
Critical Zone
T
L
to T
P
Reflow Condition
- Temperature Min (T
s(min)
)
- Time (Min to Max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
T
P
T
L
Temperature
Pre Heat
- Temperature Max (T
s(max)
)
T
S(max)
Preheat
t
L
Ramp-down
T
S(min)
t
S
25
time to peak temperature
(t 25ºC to peak)
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Product Characteristics
Materials
Product Marking
Operating
Temperature
Moisture Sensitivity
Level
Mechanical Shock
Vibration
Moisture Resistance
No Load Humidity
Thermal Shock
Part Numbering System
0461 1.25 E E R
SERIES
AMP Code
Enhanced TELELINK
®
QUANTITY Code
PACKAGING Code
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity & Packaging Code
461E Series
92
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461E.html for current information.