© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/20/15
Surface Mount Fuses
159 Fuse and Clip Series
159 Series Telelink® Fuse and Clip Assembly
Description
Agency Approvals
Electrical Characteristics for Series
Features
RoHS
% of Ampere
Rating Opening Time
100% 4 hours, Minimum
250% 1 sec., Minimum
120 secs., Maximum
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E14721 0.5A, 1.25A, 2.0A
The 159 Series product is a metal fuse clip with pre-
installed Littelfuse 461 Series TeleLink® fuse. This fuse
and clip combination can be automatically installed in PC
Boards in one efficient manufacturing operation. It permits
quick and easy fuse replacement without exposing the PC
Board and other components to risks of rework solder heat
as required with direct surface mount fuses.
It meets UL 60950 power cross requirements and is
designed to allow compliance with Telcordia GR-1089-
CORE and TIA-968-A Surge Specifications. The product
provides coordinated protection with Littelfuse SIDACtor®
protection thyristors without series resistors.
Applications
Offer low profile
easily-replaceable fuse
alternative compatible
with automated
PCB surface mount
equipment
Come supplied with
surge resistant Littelfuse
461 series TeleLink® Slo-
Blo® fuse
Fuse designed to allow
compliance with Telcordia
GR-1089-CORE and TIA-
968-A (formerly FCC Part
68) Surge Specifications
Provide coordinated
protection with Littelfuse
SIDACtor® protection
thyristor devices and
GDTs, without series
resistors
RoHS compliant and
Halogen Free
Clip fully compatible
with RoHS/lead-free
solder alloys and higher
temperature profiles
associated with lead-free
assembly
Available in ratings of
0.5-2.0 Amperes
Telecom equipment (POTS) applications such as
modems, answering machines, telephones, fax
machines, and security systems
Network equipment, such as:
- SLIC interface portion of Fiber to the Curb (FTTC) and
Fiber to the Premises (FTTP)
- Non-Fiber SLIC interface for Central Office (CO)
locations and Remote Terminals (RT)
- xDSL applications such as ADSL, ADSL2+, VDSL, and
VDSL2+
- Ethernet 10/100/1000BaseT
- ISDN “U” interface
- Baystation T1/E1/J1, T3 (DS3) trunk cards
Specifications are subject to change without notice. Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/20/15
Surface Mount Fuses
159 Fuse and Clip Series
Average Time Current Curves
Temperature Re-rating Curve
Maximum Temperature Rise
Telecom Nano Fuse Temperature
04611.25 ≤82oC (180oF)
0461002 ≤50oC (122oF)
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
Max
Voltage Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal Melting
I2t (A2sec)
Agency Approvals
0.50 .500 600
60 A @600 VAC
0.560 0.8401x
1.25 1.25 600 .1040 16.51x
2.00 002. 600 .0450 1 7. 5 1x
1 I2t is calculated at 10 msecs. or less. I2t at 10 times rated current has a typical value of: 24 A2sec (2.0A), 22 A2sec (1.25A), 1.3 A2sec (0.5A).
Typical inductance < 40nH up to 500 MHz.
Resistance changes 0.5% for every °C.
Resistance is measured at 10% rated current.
10001001010.1
0.001
0.01
0.1
1
10
100
CURRENT IN AMPERES
TIME IN SECONDS
1.25A
2A
.500A
TIA-968-A (formerly FCC part 68) Surge Waveforms
Surge Voltage (V) Waveform (µs) Current (A) Repititions Recommended Fuse
Metallic A 800 10×560 10 0 1 ea. polarity 1.25
Longitudinal A 1500 10×160 200 1 ea. polarity 1.25
Metallic B 1000 9×720 25 1 ea. polarity 1.25
Longitudinal B 1500 9×720 37.5 1 ea. polarity 1.25
(fuse can not open during type B events)
For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will
not open, providing for operational compliance with TIA-968-A type A surge events.
Note:
1. Re-rating depicted in this curve is in addition to the standard re-rating of 25% for
continuous operation.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/20/15
Surface Mount Fuses
159 Fuse and Clip Series
GR 1089 AC power fault 1st level inter-building (fuse
not allowed to open)
GR 1089 AC power fault 2nd level (fuse can open but
must open in a safe and controlled manner)
Test Vrms
Short
Circuit
Current (A)
Hits Duration Primary
Protector
Fuse
Choices
1 50 .33 1 15 min. removed 1.25, 2.0
2100 .17 1 15 min. removed 1.25, 2.0
3200,400,
600 1 60 1 sec. removed 1.25, 2.0
41000 1 60 1 sec. operative 1.25, 2.0
5 Diagram Diagram 60 5 secs. removed 1.25, 2.0
6 600 0.5 1 30 secs. removed 1.25, 2.0
7 440 2.2 5 2 secs. removed 1.25, 2.0
8 600 3 1 1.1 secs. removed 1.25, 2.0
91000 5 1 0.4 sec. in place 1.25, 2.0
Test
Circuite Vrms Short
(A) Duration Fuse
1 120,277 25 15 min. 0.5, 1.25, 2.0
2 600 60 5 secs. 0.5, 1.25, 2.0
3 600 7 5 secs. 0.5, 1.25, 2.0
4 100-600 2.2 15 min.. 0.5, 1.25, 2.0
5 Diagram Diagram 15 min. 0.5, 1.25, 2.0
Fuse must open before wiring simulator fuse (MDL 2.0).
Test
Number Voltage (V) Current (A) Time Fuse
Choices
L1 600 40 1.5 secs. 0.5, 1.25, 2.0
L2 600 7 5 secs. 0.5, 1.25, 2.0
L3 600 2.2 30 min. 0.5, 1.25, 2.0
L4 200 2.2 30 min. 0.5, 1.25, 2.0
L5 120 25 30 min. 0.5, 1.25, 2.0
M1 600 40 1.5 secs. 0.5, 1.25, 2.0
M2 600 7 5 secs. 0.5, 1.25, 2.0
M3 600 2.2 30 min. 0.5, 1.25, 2.0
M4 600 2.2 30 min. 0.5, 1.25, 2.0
Selection of test number depends on current limiting F fire enclosure/spacing of end product
26 AWG line cord removes L1/M1 test requirement
L5 conducted only if product does not pass section 6.1.2
L2,M2,L3,M3,L4,M4 conducted if not in a fire enclosure
Fuse must open before the wiring simulator fuse (MDL 2.0).
UL60950 Requirements
Test Voltage
(V)
Current
(A)
Waveform Repeti-
tions
Fuse
Choices
Impulse
For
handheld
units
2500 62.5 10×700ms + 10 w/60
secs. rest
0.5, 1.25,
2.0
Non
handheld
1500 37.5 10×700ms + 10 w/60
secs. rest
0.5, 1.25,
2.0
Steady-State
For
handheld
units
1500 60Hz 0.5, 1.25,
2.0
Non
handheld
1000 60Hz 0.5, 1.25,
2.0
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)
Surge
Minimum
Peak
Voltage
(V)
Minimum
Peak
Current
(A)
Max.
Rise/Min.
Decay
(µs)
Repetitions
Each
Polarity
Fuse
Choices
1 600 100 10/1000 25 1.25, 2.0
21000 100 10/360 25 1.25, 2.0
31000 100 10/1000 25 1.25, 2.0
4 2500 500 2/10 10 1.25, 2.0
51000 25 10/360 5 0.5, 1.25, 2.0
GR 1089 2nd level lightning surge telecom port
(Equipment under test shall not become a fire,
fragmentation, or electrical safety hazard)
Surge
Minimum
Peak
Voltage
(V)
Minimum
Peak
Current (A)
Max.
Rise/Min.
Decay
(µs)
Repe-
titions
Each
Polarity
Fuse
Choices
15000 500 2/10 1 0.5, 1.25, 2.0
Alter-
native 5000 500/8=625 8/10 1 0.5, 1.25, 2.0
If sufficient series resistance is used, then the 0.5 fuse may be used in test conditions 1-4.
The 0.5 fuse will open during these test conditions. The 1.25 & 2.0 will not open thus
providing operational compliance.
UL 60950 (EN 60950, formerly UL 1950) Power Cross Test
(L=Longitudinal, M=Metallic)
UL 60950 (EN 60950, formerly UL 1950) Impulse Test
and Steady-State Electric Strength Test
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/20/15
Surface Mount Fuses
159 Fuse and Clip Series
Materials
Fuse Body: Ceramic
Fuse Caps/Terminals:
Silver-plated Brass
Clip Base: Gold-plated
Clip Terminals: Nickel-plated
Product Marking Brand Logo, Current Rating, 'T'
Insulation Resistance
(after opening)
MIL-STD-202, Method 302, Test
condition A (10,000 ohms, minimum)
Operating
Temperature -55°C to 125°C with proper re-rating
Humidity Test 85°C/ 85% RH, 1000 hours
Solderability MIL-STD-202, Method 208/IPC EIA
J-STD-002, Test Condition A
Resistance to
Solvents
MIL-STD-202, Method 215 (3 solvent
types)
Thermal Shock MIL-STD-202, Method 107, Test Condition
B3 (95 cycles -65°C to +125°C)
Mechanical Shock MIL-STD-202, Method 213, Test
Condition I (100G’s peak for 6 msecs.)
Vibration MIL-STD-202, Method 201, (10-55 Hz)
Moisture Resistance MIL-STD-202, Methold 106, High
Humidity (90-98% RH), Heat (65°C)
Salt Spray/
Atmosphere
MIL-STD-202, Method 101, Test
Condition B (48 hours)
Terminal Attachment MIL-STD-202, Method 211, Test
Condition A, 5 lbs applied to end caps
Product Characteristics
Reflow Condition Pb – free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60 – 120 seconds
Average Ramp-up Rate (Liquidus Temp
(TL) to peak) 3°C/second max.
TS(max) to TL - Ramp-up Rate 3°C/second max.
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 90 seconds
Peak Temperature (TP)260+0/–5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max.
Time 25°C to peak Temperature (TP)8 minutes max.
Do not exceed 260°C
Soldering Parameters
Packaging
Part Numbering System
Packaging Option Packaging Specification Quantity Quantity & Packaging Code
24mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 1000 MR
0159 1.25 M R
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
Refer to Electrical
Characteristics table
M = 1000 pcs
R = Tape and Reel
Example:
0.5 amp product
is 0159 .500 MR
(1.25 amp shown)
Dimensions
3.12
[0.123]
4.80
[0.189]
4.80 [0.189]
L1.25 A T
F
10.90 [0.429]
10.10 [0.398]
13.00
[0.512]
3.88
[0.153]
4.40
[0.173]
4.30
[0.169]
4.90 [0.193]
"A" "B"
.004
3.50 [0.138]
3.12 [0.123]
4.80 [0.189]
4.00 [0.157]
3.00
[0.118]
1.70
[0.067]
Recommended Pad Layout
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP