Surface Mount Fuses
Surge Resistant > 461 Series TeleLink
®
Fuse
461 Series TeleLink
®
Fuse
Description
®
®
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
LR29862
AMPERE RANGE
500mA - 2A
500mA - 2A
Features
®
Electrical Characteristics for Series
% of Ampere
Rating
Opening Time
®
Maximum Temperature Rise
Telecom Nano
Fuse
Temperature Reading
Higher Currents and PCB layout designs can affect this parameter.
Readings are measured at rated current after temperature stabilizes.
Applications
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461.html for current information.
85
Revised: September 11, 2009
461 Series
461 Series
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
Surge Resistant > 461 Series TeleLink
®
Fuse
Electrical Specifications by Item
Ampere
Rating
(A)
Max
Voltage
Rating
(V)
Agency Approvals
Interrupting
Rating
Nominal Cold
Resistance (Ohms)
Nominal Melting
I t (A
2
sec)
Amp Code
Temperature Rerating Curve
Average Time Current Curves
.500A
1.25A
100
10
TIME IN SECONDS
1
0.1
0.01
0.001
0.1
1
2A
10
100
1000
CURRENT IN AMPERES
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)
Fuse
Choices
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
Fuse
Choices
4
461 Series
86
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461.html for current information.
Surface Mount Fuses
Surge Resistant > 461 Series 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
Fuse
Protector Choices
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
Fuse
4
4
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)
Repetitions
Recommended Fuse
UL 60950 requirements
UL60950 (EN 60950) (formerly UL 1950) Power Cross (L
= longitudinal, M = metallic)
Test
Number
Voltage (V) Current (A)
Time
Fuse
Choices
Dimensions
10.10
(.397")
F
L 1.25A
T
3.25
(.128")
3.12
(.123")
6.10
(.240")
12.6
(.496")
1.70 typ
(.067")
Recommended Pad Layout
3.43
(.135")
3.12
(.123")
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
Fuse Choices
Steady-State
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461.html for current information.
87
461 Series
461 Series
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
Surge Resistant > 461 Series TeleLink
®
Fuse
Soldering Parameters
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
Ramp-up
t
P
Critical Zone
T
L
to T
P
Temperature
Pre Heat
- Temperature Max (T
s(max)
)
T
L
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
Solderability
Resistance to
Dissolution of
Metallization
Mechanical Shock
High Frequency
Vibration
Moisture Resistance
Terminal Strength
Terminal Attachment
Body:
Terminations:
Thermal Shock
Part Numbering System
0461 1.25 E R
SERIES
AMP Code
*
QUANTITY Code
PACKAGING Code
*Example:
002.ER
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity &
Packaging Code
ER
461 Series
88
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/461.html for current information.
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