cooper bussmann

6125FF Series Fast-Acting Subminiature Surface Mount Fuses

  
* 6125FF Ratings above 2 amps are not recommended for new designs.
* Recommended replacement for 2A+ rating is the CB61F series.


Description
• Fast-acting surface mount fuse
• Overcurrent protection of systems up to 125Vac/72Vdc
• High inrush withstand capability
• Solder immersion compatible

Electrical Characteristics
% of Amp Rating Opening  Time
100% 4 Hours Minimum
200% 5 Second Maximum

Agency Information
• UR(UL) Recognition File: E19180 
 
Environmental Data
• Operating temperature: -55°C to 125°C
• Mechanical shock: MIL-STD-202, Method 213
• High frequency vibration: MIL-STD-202, Method 204
• Load humidity: MIL-STD-202, Method 103
• Moisture resistance: MIL-STD-202, Method 106
• Resistance to solvents: MIL-STD-202, Method 215
• Thermal shock: MIL-STD-202, Method 107
 
Ordering
• Specify packaging and product code
(i.e., TR2/6125FF500-R)
 
Soldering Method
• Wave immersion: 260°C, 10 Sec. max.
• Solder reflow: 260°C, 30 Sec. max.

Dimensions - mm (in)


Specifications
Part
Number
Current Rating (amps) Voltage
Rating
Interrupting
Rating (amps)
DC Cold Resistance (mΩ) Typ. Melting
I2t
(A2 sec)
Typical Voltage Drop (mV)
Vac Vdc 125Vac 72Vdc 32Vdc
6125FF500-R 500mA 125 72 50 50 300 750 0.08 605
6125FF750-R 750mA 125 72 50 50 300 350 0.152 433
6125FF1-R 1A 125 72 50 50 300 260 0.22 415
6125FF1.25-R 1.25A 125 72 50 50 300 171 0.355 410
6125FF1.5-R 1.5A 125 72 50 50 300 112 0.456 365
6125FF2-R 2A 125 72 50 50 300 49 1.67 160
6125FF2.5-R 2.5A 125 72 50 50 300 45 5.20 155
6125FF3-R 3A 125 72 50 50 300 35 6.24 153
6125FF3.5-R 3.5A 125 72 50 50 300 27 7.28 150
6125FF4-R 4A 125 72 50 50 300 26 7.4 145
6125FF5-R 5A 125 72 50 50 300 17 9.5 141
6125FF6.3-R 6.3A 125 72 50 50 300 14 15.1 135
6125FF7-R 7A 125 72 50 50 300 11 37.25 112
6125FF8-R 8A 125 72 50 50 300 8.7 70 110
6125FF10-R 10A 125 72 50 50 300 7.3 67.75 110
6125FF12-R 12A 125 72 50 50 300 5.3 210.59 106
6125FF15-R 15A 125 72 50 50 300 4.2 296.10 104
* AC Interrupting Rating (Measured at designated voltage, 100% power factor); DC Interrupting Rating (Measured at designated voltage, time constant of less than 50
microseconds, battery source)
** Typical Melting I2
t (Measured at 72Vdc, 10X rated current (not exceed 50A - IR @ 72Vdc)

Time-Current Curve


Packaging Code
Packaging  Code Prefix Description
TR2 5,000 fuses on tape-and-reel on a 13 inch (330mm) reel


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