D72863-000 [LITTELFUSE]
Electric Fuse, 1.25A, 600VAC, 250A (IR), Surface Mount, ROHS COMPLIANT;
| 型号： | D72863-000 |
| 厂家： | 
LITTELFUSE |
| 描述： | Electric Fuse, 1.25A, 600VAC, 250A (IR), Surface Mount, ROHS COMPLIANT |
| 文件： | 总5页 (文件大小：349K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Telecom Fuses
The FT600 fuse series is designed to assist telecommunications
equipment manufacturers in complying with North American
overcurrent protection requirements, including Telcordia GR-
1089, TIA-968-A (formerly FCC Part 68), and UL60950
3rd edition.
The low profile and small footprint of the FT600 fuse provide
a reliable, non-resettable overcurrent protection solution. The
device offers low temperature-rise performance under sneak
current fault events to prevent damage to circuit traces or
multilayer boards. When used in conjunction with SiBar™
thyristor devices, it provides designers with a complete
overcurrent/overvoltage protection solution to help them comply
with regulatory standards.
This fuse offering complements the telecom resettable
PolySwitch device series for use in applications where
intervention is desired after an overcurrent fault.
Benefits
Features
• High density placement in multi-port system designs
• Improved temperature rise performance over other
similar SMT fuse devices under sneak-current testing
• The FT600 in conjunction with a SiBar overvoltage
protection device, assists designers in meeting
regulatory standards with no additional series
components
• Low profile and small footprint
• The lightning robust surface-mount fuse offers
overcurrent protection in case of power fault events
• Enables the design of equipment complying with
applicable telecom specifications including UL60950,
TIA-968-A (formerly FCC Part 68), and Telcordia
GR-1089
• Low resistance
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Applications
• ADSL, ADSL2, ADSL2plus, SHDSL, VDSL linecards and modems
• T1/E1 systems
• Twisted-pair telecom ports requiring Telcordia GR-1089, UL60950 and FCC Part TIA-968-A
(formerly FCC Part 68) compliance
85
Protection Application Guide for Telecommunications and Networking Devices
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 on the next page to select a specific part number for each application based on the agency requirements.
Key Device Selection Citeria
Faster
Cooler Surface
Temperature
FT600-2000
SiBar Thyristor
Surge Protectors*
TVBxxxSC-L
Application
Customer premises equipment, IT equipment
Analog modems, V.90 modems,
Specification
UL 60950
TIA-968-A
Time-To-Open
FT600-0500
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
Remote terminals, line repeaters, multiplexers,
cross-connects, WAN equipment
Central office switching equipment
Analog/POTS linecards, ISDN linecards, xDSL modems,
ADSL/VDSL splitters, T1/E1 linecards,
multiplexers, CSU/DSU, servers
Telcordia GR-1089
TIA-968-A
FT600-1250
FT600-1250
FT600-2000
FT600-2000
TVBxxxSC-L
TVBxxxSC-L
Telcordia GR-1089
TIA-968-A
Notes: This list is not exhaustive. Raychem Circuit Protection welcomes our customers’ input for additional application ideas for overcurrent protection of telecom applications.
* For more information on Raychem Circuit Protection SiBar thyristor surge protectors.
Agency Specification/Selection Guide for FT600 Devices
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.
Family
FT600
Product
Lightning
Power Cross
FT600-0500
TIA-968-A (formerly FCC Part 68) - Type A & B
UL60950, 3rd Ed. – 600VAC, 40A
FT600-1250
FT600-2000
Telcordia GR-1089 – Level 1 and 2
TIA-968-A
Telcordia GR-1089 – 600 VAC, 40A
UL60950
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 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.
Interrupt Voltage and Current Ratings for FT600 Devices
Part
Ampere Rating
Voltage Rating
Typical Resistance
Typical I2t
2
( )
A
( )
V
(
)
(
)
Number
Ω
A S *
FT600-0500
FT600-1250
FT600-2000
0.50
1.25
2.00
250
250
250
0.5
0.1
1
16
18
0.05
The FT600-xxxx 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.
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Figure FT1 - Thermal Derating Curve (Normalized) for FT600 Devices
130
120
110
100
90
80
70
-70
-50
-30
-10
10
30
50
70
90
110
130
Ambient Temperature °C
86
Figure FT2 - Dimension Figures for FT600 Devices
Figure FT2 - Product Dimensions
A
C
B
Table FT1 - Dimensions for FT600 Devices in Millimeters (Inches)
Dimension
A
B
C
Part Number
Min.
Max.
Min.
Max.
Min.
Max.
Figure
FT600-0500
—
10.5
—
3.4
—
3.4
FT2
(0.413)
10.5
(0.413)
10.5
(0.133)
3.4
(0.133)
3.4
(0.133)
3.4
(0.133)
3.4
FT600-1250
FT600-2000
—
—
—
—
—
—
FT2
FT2
(0.413)
(0.133)
(0.133)
Figure FT3 - Typical Time-to-open Characteristics (at 20°C) for FT600 Devices
FT600
Figure FT3
A = FT600-0500
B = FT600-1250
C = FT600-2000
100
10
B
A
C
1
12
0.1
0.01
0.001
0.1
1
10
CURRENT IN AMPERES
100
1000
87
Table FT2 - Physical Characteristics and Environmental Specifications for FT600 Devices*
FT600
Physical Characteristics
Terminal material
Body material
Silver-plated brass*
Ceramic
Termination solderability
Per IEC-60127-4
*FT600 devices use high Pb content solder for internal construction. They are RoHS compliant.
Environmental Specifications
Test
Conditions
Solder heat withstand
Solvent resistance
Storage temperature
Storage humidity
Per MIL-STD-202, Method 210, Test Condition J
Per MIL-STD-202F, Method 215J
-40/+85°C
Per MIL-STD-202F, Method 106F
*
FT600 devices use high Pb content solder for internal construction. They are RoHS compliant.
Table FT3 - Packaging and Marking Information for FT600 Devices
Part Number
Bag Quantity
Tape & Reel Quantity
Standard Package
Part Marking
Agency Recognition
FT600-0500-2
FT600-1250-2
FT600-2000-2
—
—
—
2,500
2,500
2,500
10,000
10,000
10,000
500
1250
2000
UL, CSA
UL, CSA
UL, CSA
Notes: The -2 designates tape and reel, the package style for this product.
Table FT4 - Recommended Pad Layouts for FT600 Devices in millimeters (inches) Nominal
Device
A
B
C
D
Figures for Dimensions
Figure FT4
FT600-0500
12.6
4.0
3.7
5.2
4
(0.496)
12.6
(0.157)
4.0
(0.145)
3.7
0.204
5.2
D
A
C
FT600-1250
FT600-2000
4
4
B
(0.496)
12.6
(0.157)
4.0
(0.145)
3.7
0.204
5.2
(0.496)
(0.157)
(0.145)
0.204
Solder Reflow and Rework Recommendations for FT600 Devices
Solder Reflow:
Figure FT5
• Recommended reflow methods: IR, vapor phase oven,
hot air oven
• Devices can be cleaned using standard industry methods
and solvents
Preheating
Soldering
Cooling
300
250
200
150
100
50
Rework:
12
• If a device is removed from the board, it should be discarded
and replaced by a new device
0
120
30 to 90
10 to 20
Time(s)
88
Part Numbering System for FT600 Devices
FT 600 -1250 -2
Packaging
-2 :Tape & reel
Current in Amperes
1250=1.25
0500=0.500
2000=2.00
Voltage Rating
Product Family
WARNING:
All information, including illustrations, is believed to be reliable. Users, however, should independently evaluate the suitability of
each product for their application. Tyco Electronics Corporation makes no warranties as to the accuracy or completeness of the
information, and disclaims any liability regarding its use. Tyco Electronics’ only obligations are those in the Company’s Standard
Terms and Conditions of Sale for this product, and in no case will Tyco Electronics be liable for any incidental, indirect, or consequential
damages arising from the sale, resale, use, or misuse of the product. Specifications are subject to change without notice. In addition,
Tyco Electronics reserves the right to make changes without notification to Buyer—to materials or processing that do not affect
compliance with any applicable specification.
12
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