Datasheet

Axial Lead Fuses
3.6 x 9mm > 777 Series
777 Series Axial Lead Fuse
PS
E
RoHS
Description
The 777 Series is an axial lead 3.6mm x9mm fuse, designed
for overcurrent protection in electronic appliance charger
applications. The robust design enables the device to
withstand up to 24 hits of 7.5kV ringwave surge and, its
epoxy coating helps open safely on a direct short condition
without producing soot, sparks, sounds. The enhanced
electrical characteristics of the 777 Series make it ideal for
use in wall-mounted chargers for smartphones and tablets.
This series provides protection from catastrophic failures and
safety hazard when experiencing direct shorting on an AC
plug.
Features
Agency Approvals
Agency
PS
E
Agency File Number
Ampere Range
SU05024-13001
1.25A
E10480
1.25A
R 50267375
1.25A
NBK111010-E10480
1.25A
CQC14012107199
1.25A
• Enhanced
interrupting rating
• Higher surge
withstand capability
• Compact 3.6 x 9mm
footprint saves
board space
• Epoxy Coating
Applications
• Smartphone and tablet
wall-mount chargers
• Power Supplies for
consumer electronics
Electrical Characteristics for Series
Additional Information
% of Ampere
Rating
Datasheet
Resources
Samples
Opening Time
150%
1 hours, Minimum
275%
10 milliseconds, Minimum
3 seconds, Maximum
Electrical Characteristics by Item
Amp Code
1.25
Voltage
Rating
Interrupting Rating
250 V
50A @ 250 V AC
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
l2t (A2 sec)
0.070
2.70
Agency Approvals
PS
E
X
X
X
X
X
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/27/15
Axial Lead Fuses
3.6 x 9mm > 777 Series
Temperature Rerating Curve
Average Time Current Curves
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
260
Wave Parameter
240
Lead-Free Recommendation
Preheat:
220
200
(Depends on Flux Activation Temperature)
180
160
140
120
100
80
60
40
(Typical Industry Recommendation)
Temperature Minimum:
100° C
Temperature Maximum:
Preheat Time:
150° C
60-180 seconds
Solder Pot Temperature:
260° C Maximum
Solder Dwell Time:
2-5 seconds
Time (Seconds)
Cooling Time
Preheat Time
Dwell Time
230
240
220
210
200
190
180
170
160
150
140
130
120
110
90
100
80
70
60
50
40
20
0
0
30
20
10
Temperature (°C) - Measured on bottom side of board
300
Recommended Hand-Solder Parameters:
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/27/15
Axial Lead Fuses
3.6 x 9mm > 777 Series
Product Characteristics
Materials
Encapsulated, Epoxy Coated
body Pure-Tin-coated Copper
Lead Wire
Operating
Temperature
-55°C to 125°C
Terminal Strength
MIL-STD-202F Method
211A, Test Condition A
Thermal Shock
MIL-STD-202F, Method 107G Test
Condition B3 (5 cycles -65°C to +125°C)
Solderability
Reference IEC 60127 Second Edition
2003-01 Annex A
Vibration
MIL-STD-202F, Method 201A (10-55 Hz)
Product Marking
Body: Brand Logo, Current Rating
Characteristic "F" rated voltage
Humidty
MIL-STD-202, Method 106, High
Humidity (90-98%RH), Heat (65°C)
Packaging
Tape & Reel (1000 pcs/reel)
Salt Spray
MIL-STD-202F, Method 101D, Test
Condition B
Dimensions
Part Numbering System
26mm
9mm
0777 1.25 M R E
3.6mm
T1 P
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
0.6mm
Quantity Code
M = 1000
Packaging Code
R = Tape and reel
Option Code
5.00
9mm
E = Axial Leaded
Lead Length
0.8 max.
52.4
T1 = Lead length
6.35
Lead-free
P = Lead-Free
Others = Special Options
Please call Littelfuse for detail
All dimensions in mm
Packaging
Packaging Option
Packaging Specification
Quantity
Packaging Code
Taping Width
Tape & Reel
EIA 296
1000
MRET1
T1 = 52mm (2.062)
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/27/15