Description
• Fast-acting surface mount fuse
• Overcurrent protection of systems up to 125Vac/72Vdc
• High inrush withstand capability
• Solder immersion compatible
Agency Information
• 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.
Electrical Characteristics
% of Amp Rating Opening Time
100% 4 Hours Minimum
200% 5 Second Maximum
2.6 3.0
(0.102) (0.118)
4.0
(0.157)
8.6
(0.338)
Recommended Pad Layout - mm (in)
Dimensions - mm (in)
Surface Mount Device
* 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 I2t (Measured at 72Vdc, 10X rated current (not exceed 50A - IR @ 72Vdc)
Specifications
Part Current Voltage Interrupting DC Cold Melting Typical
Number Rating Rating Rating (amps) Resistance I2t Voltage
(amps) Vac Vdc 125Vac 72Vdc 32Vdc (m
ΩΩ
) Typ. (A2sec) Drop (mV)
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 1 125 72 50 50 300 260 0.22 415
6125FF1.25-R 1.25 125 72 50 50 300 171 0.355 410
6125FF1.5-R 1.5 125 72 50 50 300 112 0.456 365
6125FF2-R 2 125 72 50 50 300 49 1.67 160
6125FF2.5-R 2.5 125 72 50 50 300 45 5.20 155
6125FF3-R 3 125 72 50 50 300 35 6.24 153
6125FF3.5-R 3.5 125 72 50 50 300 27 7.28 150
6125FF4-R 4 125 72 50 50 300 26 7.4 145
6125FF5-R 5 125 72 50 50 300 17 9.5 141
6125FF6.3-R 6.3 125 72 50 50 300 14 15.1 135
6125FF7-R 7 125 72 50 50 300 11 37.25 112
6125FF8-R 8 125 72 50 50 300 8.7 70 110
6125FF10-R 10 125 72 50 50 300 7.3 67.75 110
6125FF12-R 12 125 72 50 50 300 5.3 210.59 106
6125FF15-R 15 125 72 50 50 300 4.2 296.10 104
1009 BU-SB09935 Page 1 of 2 Data Sheet 4326
Fast-Acting Subminiature Fuses
6125FF Series
CURRENT IN AMPS
CURRENT IN AMPS
Time-Current Curve
Packaging Code
Packaging Code Prefix Description
TR2 5,000 fuses on tape-and-reel on a 13 inch (330mm) reel
1009 BU-SB09935 Page 2 of 2 Data Sheet 4326
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any technical information contained
in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Bussmann does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support
systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in
significant injury to the user.
© 2009 Cooper Bussmann
St. Louis, MO 63178
www.cooperbussmann.com
