Technical Data 4326 Effective December 2015
Supersedes March 2015
Product description
• Fast-acting surface mount fuse
• Overcurrent protection of systems up to
125Vac/72Vdc
• High inrush withstand capability
• Solder immersion compatible
Applications
• Power supplies
• Servers
• LED/LCD televisions
• Appliances and white goods
• LCD monitor/backlight inverters
• Laptops and notebooks
Agency information
• cURus Recognition file number: E19180,
Guide JDYX2/JDYX8
Ordering
Specify part number and packaging prefix as shown
Packaging prefix Part number
TR2- 6125FF1-R
Packaging prefixes
• TR2- (Tape and reel, 5000 parts per 13”
diameter reel)
6125FF
Fast-acting subminiature fuses
2
Technical Data 4326
Effective December 2015
6125FF
Fast-acting subminiature fuses
www.eaton.com/elx
Electrical characteristics
% of Amp Rating Opening Time
100% 4 Hours Minimum
200% 5 Second Maximum
Product specifications
Part Number3Current rating
(amps)
Voltage rating Interrupting rating1 (amps) DC cold
resistance
(mΩ) Typ.
Melting2
I2t
(A2 second)
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 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
1 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)
2 Typical Melting I2t (Measured at 72Vdc, 10X rated current (not exceed 50A - IR @ 72Vdc)
3 Part number definition: 6125FFxxx-R
6125FF= Product code and size
xxx= Ampere
-R= RoHS compliant
Recommended pad layout–mm (in)
1.35
(0.053) TYP.
2.72±0.15
(0.107±0.006)
6.10±0.20
(0.24±0.008)
2.72±0.15
(0.107±0.006)
Dimensions–mm (in)
2.6
(0.102)
4.0
(0.157)
3.0
(0.118)
8.6
(0.338)
3
Technical Data 4326
Effective December 2015
6125FF
Fast-acting subminiature fuses
www.eaton.com/elx
Time vs. current curve
CURRENT IN AMPS
CURRENT IN AMPS
4
Technical Data 4326
Effective December 2015
6125FF
Fast-acting subminiature fuses
www.eaton.com/elx
Temperature derating curve
Environmental data
Operating temperature: -55°C to 125°C (with derating)
Storage 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
Temperature (°C)
Percentage of Rating
80.00
-25.0 0.0 24.0 50.0 85.0 105.0 125.0
85.00
90.00
95.00
100.00
105.00
110.00
115.00
120.00
125.00
5
Technical Data 4326
Effective December 2015
6125FF
Fast-acting subminiature fuses
www.eaton.com/elx
Temperature
t
tP
ts
TC -5°C
Time 25°C to Peak Time
25
°C
Tsmin
Tsmax
TL
TP
Preheat
A
Max. Ramp Up Rate = 3°C/s
Max. Ramp Down Rate = 6°C/s
Solder Reflow Profile
Reference JDEC J-STD-020D
Profile Feature Standard SnPb Solder Lead (Pb) Free Solder
Preheat and Soak • Temperature min. (Tsmin) 100°C 150°C
• Temperature max. (Tsmax) 150°C 200°C
• Time (Tsmin to Tsmax) (ts)60-120 Seconds 60-120 Seconds
Average ramp up rate Tsmax to Tp3°C/ Second Max. 3°C/ Second Max.
Liquidous temperature (Tl)
Time at liquidous (tL)
183°C
60-150 Seconds
217°C
60-150 Seconds
Peak package body temperature (TP)* Table 1 Table 2
Time (tp)** within 5 °C of the specified classification temperature (Tc)20 Seconds** 30 Seconds**
Average ramp-down rate (Tp to Tsmax)6°C/ Second Max. 6°C/ Second Max.
Time 25°C to Peak Temperature 6 Minutes Max. 8 Minutes Max.
* Tolerance for peak profile temperature (Tp) is defined as a supplier minimum and a user maximum.
** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum.
Table 1 - Standard SnPb Solder (Tc)
Package
Thickness
Volume
mm3
<350
Volume
mm3
≥350
<2.5mm) 235°C 220°C
≥2.5mm 220°C 220°C
Table 2 - Lead (Pb) Free Solder (Tc)
Package
Thickness
Volume
mm3
<350
Volume
mm3
350 - 2000
Volume
mm3
>2000
<1.6mm 260°C 260°C 260°C
1.6 – 2.5mm 260°C 250°C 245°C
>2.5mm 250°C 245°C 245°C
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
www.eaton.com/elx
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. 4326 BU-SB15120
December 2015
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
6125FF
Fast-acting subminiature fuses
Technical Data 4326
Effective December 2015
Life Support Policy: Eaton 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.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Wave solder profile
Reference EN 61760-1:2006
Profile feature Standard SnPb solder Lead (Pb) free solder
Preheat and soak • Temperature min. (Tsmin) 100°C 100°C
• Temperature typ. (Tstyp) 120°C 120°C
• Temperature max. (Tsmax) 130°C 130°C
• Time max. (Tsmin to Tsmax) (ts)70 Seconds 70 Seconds
∆ preheat to max Temeperature 150°C max. 150°C max.
Peak temperature (Tp) 235°C - 260°C 250°C - 260°C
Peak package body temperature (TP)* Table 1 Table 2
Time at peak temperature (tp)10 seconds max
5 seconds max each wave
10 seconds max
5 seconds max each
Ramp-down rate ~ 2 K/s min
~3.5 K/s typ
~5 K/s max
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
Time 25°C to 25°C 4 minutes 4 minutes
T
smin
Tsmax
Tstyp
Tp
tp
First Wave Second Wave
Preheat area Cool down area
Temperature
Time
