L1245F Engineering Specification
Brand : Songshan
Product origin : Shanghai
Delivery time : 7-15 days
Supply capacity : 15000000
The 1245 series is a fast-acting surface-mounted fuse with large current, and its maximum specification reaches 125A, and the whole series meets the voltage 86VDC@1500A Breaking condition, with small size, width 4.5mm, easy to arrange, and special fuse design, high connection reliability; new end design, good heat dissipation, low product temperature rise; one body fuse-element design, good product consistency; high I²T, strong surge resistance. It is applied to servers, routers and communication base stations; Industrial machinery such as forklifts, bulldozers, garden tools and electric vehicles; High-power power supply system, storage system.
1. Electrical Characteristics
Ampere Rating | % of Current Rating | Opening Time |
50-125A | 100% | Min.4hours |
350% | Max120sec |
2. Electrical Specifications
Part Number | Current Rating(A) | Voltage Rating(V) | Interrupting Capacity | Typical Cold DCR*(mΩ) | Nominal I²T** (A²s) |
L1245F50.0A | 50 | 86V | 86VDC1500A | 0.69 | 4000 |
L1245F60.0A | 60 | 0.6 | 6500 | ||
L1245F70.0A | 70 | 0.58 | 7200 | ||
L1245F80.0A | 80 | 0.56 | 9200 | ||
L1245F90.0A | 90 | 0.54 | 10500 | ||
L1245F100A | 100 | 0.50 | 12000 | ||
L1245F125A | 125 | 0.47 | 14000 |
Type | L | W | T | D |
(mm) | (mm) | (mm) | (mm) | |
L1245F | 12.30±0.50 | 4.50±0.2 | 4.50±0.2 | 2.70±0.3 |
4. Recommended Land Patterns
Dimensions | Spec |
A（mm） | 5.8±0.3 |
B（mm） | 16.0±0.30 |
C（mm) | 6.4±0.30 |
D（mm） | 5.1±0.3 |
5. Materials
Components | Material |
Body | Ceramic |
Fuse-element | Copper |
Terminations | Silver plated brass |
6. Part Number Information
7. Time Current Curve
8. Temperature Re-rating Curve
When choosing the fuse’s specification,if the operating Environmental temperature beyond the scope from 20~30℃，engineer should consider the environmental temperature’s affection to fuses.Please refer Temperature Re-rating Curve.
9. Product Characteristics
Item | Test condition | Performance | Standard |
Time/Current | 100% of current rating | 4hr Min | UL248-14 |
350% of current rating . | 10sec Max | Factory SPEC | |
1000%of current rating | 1msec Min | Factory SPEC | |
Interrupting Ability | 1500A@86VDC | without permanent arcing,ignition and bursting of fuse link | UL248-14 |
Solder ability | 240℃±5℃，3sec±0.5sec, | 90% coverage Min. | MIL-STD-202 |
Resistance to Soldering Heat | 260℃±5℃，10sec±0.5sec, | |△R|: <10% | MIL-STD-202 |
Moisture resistance | 10 cycle | |△R|: <10%., no mechanical damage | MIL-STD-202 |
Salt Spray | 5%±1% salt solution ，48hours | |△R|: <10% | MIL-STD-202 |
Mechanical Shock |
| |△R|: <10%., no mechanical damage | MIL-STD-202 |
Mechanical Vibration | Amplitude 10Hz～55Hz in 1 min. 2 hours，each XYZ, total 6 hours | |△R|: <10%., no mechanical damage | MIL-STD-202 |
Thermal Shock | -65°C to +125°C, 100 cycles, | |△R|: <10%., no mechanical damage | MIL-STD-202 |
10. Storage
Packaged Fuse should be storage at ambient temperature for -10~+40 ℃ relative humidity below 80%,the warehouse of Ambient air in non-acidic, non-alkaline or other no corrosive gases,Before use, need to confirm the aluminum foil bag sealing intact
11. Recommended Solder Curve
12.Packaging
Tape（mm） | Reel（inch） | Quantity |
24 | 13 | 1500 |
13. Others
This product is fully in line with the EU ROHS requirements!