104 RoHS Compliant, ELV Compliant HF Halogen Free
11
Protection Application Guide for Telecommunications and Networking Devices
Customer premises equipment, IT equipment UL 60950 FT600-0500 FT600-2000
Analog modems, V.90 modems, TIA-968-A FT600-1250
ISDN modems, xDSL modems,
ADSL splitters, phone sets, fax machines,
answering machines, caller ID, internet
appliances, PBX systems, POS terminals, wall plugs
Access network equipment Telcordia GR-1089 FT600-1250 FT600-2000
Remote terminals, line repeaters, multiplexers, TIA-968-A
cross-connects, WAN equipment
Central office switching equipment Telcordia GR-1089 FT600-1250 FT600-2000
Analog/POTS linecards, ISDN linecards, xDSL modems, TIA-968-A
ADSL/VDSL splitters, T1/E1 linecards,
multiplexers, CSU/DSU, servers
Note : This list is not exhaustive.TE Circuit Protection welcomes our customers’ input for additional application ideas for overcurrent protection of telecom applications.
Application Specification
Faster Cooler Surface
Time-To-Open Temperature
To use this guide, follow the steps below:
1. Select your equipment type from the guide below.
2. Use the Key Device Selection Criteria (time-to-open, surface temperature) to determine best suitability for your application.
3. Use Agency Specification / Selection Guide to select a specific part number for each application based on the agency requirements.
Agency Specification/Selection Guide for FT600 Devices
Family Product Lightning Power Cross
FT600 FT600-0500 TIA-968-A – Types A & B UL60950, 3rd Ed. – 600VAC, 40A
FT600-1250 Telcordia GR-1089 – Level 1 and 2 Telcordia GR-1089 – 600 VAC, 40A
FT600-2000 TIA-968-A UL60950
Use the guide below to select FT600 devices appropriate for use in your application. The following pages contain specifications for part
numbers recommended below. FT600 devices enable telecommunication equipment to meet the applicable protection requirements of
these industry specifications. Refer to individual agency specifications for test procedures and circuit schematics. Users should
independently evaluate the suitability of, and test each product for their application.
FT600-0500 0.50 250 0.50 1
FT600-1250 1.25 250 0.10 16
FT600-2000 2.00 250 0.05 18
Part Number
Ampere Rating
(A)
Voltage Rating
(V)
Typical Resistance
(Ω)
Typical I2t
(A2s)*
130
120
110
10 0
90
80
70
-70 -50 -30 -10 10 30 50 70 90 110 130
Ambient Temperature ˚C
% of Current Rating
Notes: FT600-1250 and FT600-2000 assist equipment in complying with Telcordia GR-1089 specifications. In-circuit testing is strongly recommended.
The FT600-0500, FT600-1250 and FT600-2000 help meet the UL60950 Power Cross and FCC TIA-968-A 68 lightning surge requirements. Note that Type A tests allow for an
overcurrent protection component to fuse open during the surge.
Note: The FT600-xxxx devices carry 100% of rated current for 4 hours minimum and 250% of rated current for 1 second minimum, 120 seconds maximum.
Resistance measured at 10% of rated current.
*I2t is calculated at 10 ms or less.
Key Device Selection Criteria
Table FT1 Interrupt Voltage and Current Ratings for FT600 Devices
Figure FT1 Thermal Derating Curve (Normalized) for FT600 Devices