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The TeleLink® Surface Mount (SM) surge resistant time
lag fuse has been designed t o offer the ultimate in circuit
protection while meeti ng the necessary surge
requirement s of the telecommunications indu stry. When
used in conjunction with the SIDACtor® Transient Voltage
Suppressor (TVS), the TeleLink SM fuse (F0500T 500mA
and F1250T 1.25A) and the SIDACtor TVS provi de a
complete regulatory compliant solution for standards such
as GR 1089, FCC Part 68, UL 1950, and ITU K.20 & K.21.
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•Surface Mount Technology
•100A, 10x1000µs & 500A, 2x10µs surge current ratings
•Eliminates the need for costly power resistors and PTC’s
•Designed specifically for telecommunications equipment
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TeleLink® SM Fuse
CSA Approved
File No. LR702828
UL Recogn ized
E-191008
Patent Pending
TeleLink SM Fuse Advantages TeleLink® SM Fuse
http://www.teccor.com Tec cor Elect ronics
Page: 2 972-580-7777
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•The elimination of series line resistance enabling longer loop lengths
•Precise longitudinal balance allowing better transmission quality
•Robust surge performance which elimates costly down time due to nuisance blows
•Greater surge ratings than resettable devices ensuring regulator y compliance
•Non-degenerative performance
•Available in surface mount packaging which utilizes less PCB real estate, eliminates mixed technologies,
and reduces manufactur ing costs
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For circuits that do not require additional series resistance, the surge current rating (IPP) of the TeleLink SM Fuse
should be g reat er than or equa l to t he su rge curren ts as soci ated wi th the l ightni ng im munit y tes ts of the a pplic able
regulatory requirement (IPK).
IPP ≥ IPK
For circuits that utilize additional series resistance, the surge current rating (IPP) of the TeleLink SM Fuse shoul d
be greater than or equal to the available surge currents associated with the lightning immunity tests of the
applicable regulatory requirement (IPK (available)).
IPP ≥ IPK (available)
The maximum available surge current is calculated by dividing the peak surge voltage (VPK) by the total circuit
resistance (RTOTAL).
IPP ≥ IPK (available) = VPK/RTOTAL
For longitudinal surges (TIP-GND, RING-GND), RTOTAL is calculated for both TIP and RING.
RTOTAL = RTIP + RSOURCE
RTOTAL = RRING + RSOURCE
For metallic surges (TIP-RING):
RTOTAL = RTIP + RRING + RSOURCE
To select the most appropriate TeleLink SM Fuse / SIDACtor TVS comb ination, simply decide what regulatory
requirem ent yo ur equip ment wil l need to meet and refer t o the followi ng tabl e. For app licat ions th at do no t require
agency approval or multiple listings, please contact Teccor Electronics.
Regulatory Requirement TeleLink SM Fuse SIDACtor TVS
GR 1089 F1250T C Series
FCC Part 68, Type A F1250T B Ser ies
FCC Part 68, Type B F0500T A Ser ies
ITU K.20 F0500T A Series
ITU K.21 F0500T A Series
UL 1950 All All
UL 1950 All All
TeleLink® SM Fuse Selection Criteria
Teccor Electronics http://www.teccor.com
972-580-7777 Page: 3
TeleLink® SM Fuse
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Notes:
• The TeleLink SM Fu se is de signe d to c arry 10 0% of i ts’ ra ted cu rrent for fou r hours and 2 50% of its’ rated
current fo r one secon d minimu m and 120 s econds m aximum. Typical tim e is 4 to 10 seconds. Fo r optimal
performance, an operating current of 80% or less is recommended.
• I2 t is a non-repetitive RMS surge current rating for a period of 16.7 msec.
• *Interrupt test characterized at 50° to 70° phase angle. Phase angles approximating 90° may result in
damage to the body of the fuse.
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Notes:
• Typical inductance ≅ 4µH up to 500MHz.
• Resistance changes .5% for every °C.
• Measured at 10% ra ted current .
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The PCB traces must be designed such that its I2t rating exceeds the I2t of the TeleLink fuse. A 1oz.
.025” wi dth is recommended, but reference to the IPC D 275 standard may provide more precise
details.
For UL1950 compliance, design considerations must be given to the test conditions of Annex NAC. In
particular, test 3 and 3A are intended to produc e the maximum heating effects. Therefore, PCB layout
design should compensate appropriately.
TeleLink SM Fuse 2x10µs10X160µs10X560µs10X1000µs
F0500T not rated 75A 45A 35A
F1250T 500A 160A 115A 100A
TeleLink
SM Fuse Voltage
Rating Current
Rating
I2t
Measured
@ DC Rated
Voltage
Interrupting
Rating Min. Typ. Max.
F0500T 250V 500mA 1.3A2s 600V, 40A 1 sec 2 sec 60 sec
F1250T 250V 1.25A 22.2A2s 600V, 60A * 1 sec 2 sec 60 sec
TeleLink SM Fuse Typical V oltage Drop
@ Rated Current DC Cold Resistance
Min. Max.
F0500T .471V .420Ω.640Ω
F1250T .205V .107Ω.150Ω
Qualification Data TeleLink® SM Fuse
http://www.teccor.com Tec cor Elect ronics
Page: 4 972-580-7777
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The F1250T has been designed to meet the following test conditions per GR 1089 without any additional series
resista nc e, h owev er i n-c irc uit tes t v eri fic ati on i s requ ired . Pl eas e n ote tha t c ons id erab le hea tin g m ay oc cu r du ring
Te st 4 of the Second Level AC Power Fault Test.
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Test Surge
Voltage Wave-form Surge Current Repetitions Each
Polarity
1 ±600V 10x1000µs 100A 25
2 ±1000V 10x360µs 100A 25
3 ±1000V 10x1000µs 100A 25
4 ±2500V 2x10µs 500A 10
5 ±1000V 10x360µs 25A 5
Test Surge
Voltage Wave-form Surge Current Repetitions Each
Polarity
1 ± 5000V 2x10µs 500A 1
Test Applied Voltage, 60Hz Short Circuit Current Duration
150VRMS .33A 15 minutes
2100VRMS .17A 15 minutes
3200VRMS, 400VRMS,
600VRMS 1A at 600V 60 Applications,
1 second each
41000VRMS 1A 60 Applications,
1 second each
5 Diagram Diagram 60 Applications ,
5 seconds each
6600VRMS 0.5A 30 seconds each
7600VRMS 2.2A 2 seconds each
8600VRMS 3A 1 second each
91000VRMS 5A 0.5 second each
TeleLink® SM Fuse Qualification Data
Teccor Electronics http://www.teccor.com
972-580-7777 Page: 5
TeleLink® SM Fuse
6HFRQG/HYHO$&3RZHU)DXOW7HVWIRU1RQ&XVWRPHU3UHPLVHV(TXLSPHQW
Notes:
• Power fault tests equal or exceed the requirements of UL1950 3rd edition.
• Test 4 is intended to produce a maximum heating effect. Temperature readings can exceed 150°C.
• Test 2 may be dep end ent on the closin g a ngl e of the v ol tage source. Fuse is characterized a t 50 ° to 70 °.
Closing angles approximating 90° may result in damage to the body of the fuse.
Test Applied Voltage, 60Hz Short Circuit Current Duration
1120VRMS, 277VRMS 30A 30 minutes
2600VRMS 60A 5 seconds
3600VRMS 7A 5 seconds
4 100VRMS - 600VRMS 2.2A at 600V 30 minutes
Time Current Curve TeleLink® SM Fuse
http://www.teccor.com Tec cor Elect ronics
Page: 6 972-580-7777
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Time in seconds
Current in Amperes
.01
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
1000
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
700
600
900
800
1000
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
700
600
900
800
1000
.01
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
200
300
400
500
600
700
800
1000
F0500T
F1250T
TeleLink® SM Fuse SM Mechanical Data
Teccor Electronics http://www.teccor.com
972-580-7777 Page: 7
TeleLink® SM Fuse
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1. End plate
2. High temperature solder preform
3. Metallization of ceramic body
4. Ceramic bod y
5. Fuse element
6. End termination overcoat on both ends (Nickel flash, Tin/Lead overcoat)
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End View in mm (inches)
Top View in mm (inches)
12 3 4 5 6
2.77± 0.15
(0.109± 0.006)
2.77± 0.15
(0.109± 0.006)
1.40± 0.25 1.40± 0.25
(0.055± 0.010) (0.055± 0.010)
2.77± 0.15
(0.109± 0.006)
10. 2 9± 0.20
(0.405± 0.008)
SM Mechanical Data TeleLink® SM Fuse
http://www.teccor.com Tec cor Elect ronics
Page: 8 972-580-7777
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Side View mm (inches)
Footprint mm(inches)
1.40± 0.25 1.40± 0.25
(0.055± 0.010) (0.055± 0.010)
2.77± 0.15
(0.109± 0.006)
10.29± 0.20
(0.405± 0.008)
5.2 3.7
(0.204) (0.145)
4.0
(0.157)
12.6
(0.496)
TeleLink® SM Fuse Soldering Recommendations
Teccor Electronics http://www.teccor.com
972-580-7777 Page: 9
TeleLink® SM Fuse
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Reservoir Temperature: 260°C (500 °F)
Time in Reservoir: 3 seconds maximum
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Tempe rature: 240°C (464°F)
Time: 30 seconds maximum
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Operati ng Temperature: -55°C to +125°C with proper correction fac tor app lie d
Chart of correction factor
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Notes:
• Measured at rated current after temperature stabilizes.
• *Higher currents and PCB layout designs can effect this parameter.
• The F1250T m eets th e req uirem ents of UL 248-14 . Howev er, boa rd layo ut, boar d trace w idth s, and amb i-
ent temperature values can cause higher than expected rises in temperature. During UL testing, the typi-
cal recorded heat rise for the F1250T at 2.2A was 120°C.
Fuse Temperature Reading
F0500T ≤ 75°C* (167°F)
F1250T ≤ 75°C* (167°F)
30
40
50
60
70
80
90
100
110
120
130
140
150
-55 -60 -40 -20 0 20 40 60 80 100 125
Ambient °C
Percent of Rating
Effect on Current
Rating
Packaging TeleLink® SM Fuse
http://www.teccor.com Tec cor Elect ronics
Page: 10 972-580-7777
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•24mm black anti-static tape
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Marking F0500T F1250T Manufactured in
USA Manufactured in
Taiwan
FU F U
FT F T
JU J U
JT J T
4˚ Max.
Section 'A'-'A'
.343±.013
.0135±.0005
+.30
-.10
+.012
-.004
24.00
.945
8˚ Max.
11.07±.10
.436±.004
11.50±.10
.453±.004
1.75±.10
.124±.004
3.15±.10
.436±.004 4.00±.10
.157±.004
1.50±.25
.059±.010
2.00±.10
.079±.004
1.50±.10
.059±.004
'A'
'B'
'A'
'B'
Dia.
8.00±.10
.315±.004 Dia.
3.28±.10
.129±.004
TeleLink® SM Fuse Packaging
Teccor Electronics http://www.teccor.com
972-580-7777 Page: 11
TeleLink® SM Fuse
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•Injection molded, high impact anti-static, white plastic reel
•Confor ms to EIA-481-1
•Surface re sistivity 1011 OHMS/Square
•Per ASTM D-257
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Description Packing Quantity Suffix
Embossed Carrier Reel Pack 2500 RP
Bulk Pack 1000 BP
Access Hole
greater than
40.00 at slot
1.575 location
13.00±.20
.512±.008
Arbor Hole
60.00±1.00
2.362±.039
hub dia.
2.00
.079
(Drive Spokes)
min.
20.20
.795 min.
Tape Slot Depth
greater than 10.00
.394
330.00
12.992
max dia.
30.40
1.19
(measured
at hub)
25.65±1.75
1.00±.069
(measured at
outer edge)
5.00±.51
.197±.020
(tape starter slot)
24.40
.960 +.079
-.00
(measured
at hub)
+2.00
-.00
TECCOR ELECTRONICS
1801 Hurd Drive
Irving, Texas 75038-4385
United States of America
Phone: 972-580-7777
Fax: 972-550-1309
Web site: http://www.teccor.com
E-mail: sidacto r.techsales@tecc or.c om
Please contact the factory for further information.
Data Sheet: TeleLink® 1250T - 1000
Teccor Electronics is the proprietor of the trademarks
SIDACtor®, Battrax®, and TeleLink®.
Teccor Electronics SIDACtor® TVS product is covered
by these and other U.S. Patents: 4,685,120 - 4,827,497
- 4,905,119 - 5,479,031 - 5,516,705
An Invensys compan y
