Raychem FT600 Series Overcurrent Fuse
New surface-mount fuse products for overcurrent protection of communications equipment
Benefits:
•When combined with a SiBar™ overvolt-
age protection device, assists equipment
in meeting regulatory standards with no
additional series components
•Improved temperature rise performance
over other similar SMT fuse devices
under sneak current testing
•High density placement in multi-port
system designs
Target Applications:
•xDSL and ADSL linecards and modems
•T1/E1 systems
•Twisted pair telecom ports requiring
Telcordia GR-1089, UL60950 and FCC
Part 68 compliance
Features:
•The lightning robust surface-mount fuse
offers overcurrent protection from power
faults
•Designed to assist equipment in comply-
ing with telecom specifications including
UL60950, FCC Part 68, and Telcordia
GR-1089
•Small footprint and low resistance
•Low profile
The FTxxxx devices are designed to 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.
Part Ampere Rating Voltage Rating Typical Resistance Typical I2t
Number (A) (V) (Ω)(A
2s)*
FT600-0500 0.50 250 0.5 1
FT600-1250 1.25 250 0.1 16
FT600-2000 2.00 250 0.05 18
Interrupt Voltage and Current Ratings
Note: FT600-1250 and FT600-2000 are designed to assist equipment in complying with Telcordia GR-1089 specifications. In-circuit testing is strongly recommended.
The FT600-0500, FT600-1250 and FT600-2000 are designed to meet the FCC Part 68 lightning surge requirements. Note that Type A tests allow for an overcurrent protection component to fuse open during
the surge.
GR-1089 GR-1089 UL60950 GR-1089/UL60950 GR-1089/UL60950 GR-1089 UL60950
1000Vac, 5A, 0.5sec 600Vac, 60A, 5sec 600Vac, 40A, 1.5sec 600Vac, 7A, 5sec 600Vac, 2.2A, 30min 277Vac, 25A, 15min 120Vac, 25A, 30min
FT600-0500 ✓✓✓✓✓
FT600-1250 ✓✓✓✓✓✓✓
FT600-2000 ✓✓✓✓✓✓✓
Telcordia First Level First Level First Level First Level First Level Second Level
GR-1089 Test 1 Test 2 Test 3 Test 4 Test 5 Test 1
Surge Voltage (Vpk) 600 1000 1000 2500 1000 5000
Wave Form (µs) 10x1000 10x360 10x1000 2x10 10x360 2x10
Surge Current (A) 100 100 100 500 25 500
Repetitions (each polarity) 25 25 25 10 5 1
FT600-0500
FT600-1250 ✓✓✓✓✓✓
FT600-2000 ✓✓✓✓✓✓
FCC Type A Type A Type B Type B
Part 68 Metallic Longitudinal Metallic Longitudinal
Surge Voltage (Vpk) 800 1500 1000 1500
Short Circuit Wave Form (µs) 10x560 10x160 5x320 5x320
Surge Current (A) 100 200 25 37.5
Repetitions (each polarity) 11 11
FT600-0500 Fuse open Fuse open ✓✓
FT600-1250 ✓✓ ✓✓
FT600-2000 ✓✓ ✓✓
Product Dimensions