© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/15/15
Surface Mount Fuses
Nano2® > 600VDC > Fast-Acting Fuse > 485 Series
485 Series Fuse
Agency Approvals
Agency Agency File Number Ampere Rating
E10480 1A - 3.15A
29862 1A - 3.15A
Features
Electrical Characteristics for Series
• Fast Acting / Surface
mount high fuse for high
voltage (up to 600VDC)
applications.
• Fully compatible with
lead-free solder alloys
and higher temperature
profiles associated with
lead-free assembly.
• Relatively high breaking
capacity at 100A.
• RoHS compliant /
Halogen Free
• Rating – 1 - 3.15
Amperes.
% of Ampere
Rating Opening Time at 25ºC
100% 4 hours, Minimum
200% 60 seconds, Maximum
Electrical Specifications by ltem
Ampere
Rating
(A)
Amp Code
Max Voltage
Rating
(V)
Interrupting Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting I2t
(A2sec)
Agency Approvals
1. 0 0 0 01. 600
100A@600VDC,
100A@250VAC
0.264 0.3044 X X
1.50 01. 5 600 0.123 0.3917 X X
2.00 002. 600 0.0744 0.8962 X X
2.50 02.5 600 0.0583 1.4921 X X
3.15 3.15 600 0.0395 3.304 X X
RoHS
The 485 Nano2® Fuse Series is a small, fast acting, surface
mount ceramic fuse rated at a remarkable 600VDC at its
small size and with 100A breaking capacity. It is primarily
designed for circuit protection in high energy applications.
This product is fully compatible with lead-free solder alloys
and higher temperature profiles associated with lead-free
assembly.
Description
Applications
• PC server and Telecom
systems
• LCD TV inverter boards
DC input protection
• Uninterruptible Power
Supply (UPS) / 3-Phase
Power Supplies
• 380VDC server / lighting
in data center
Notes:
1. Cold resistance measured at less than 10% of rated current at 23°C.
2. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved.
3. I2t values stated for 8 msec opening time.
Specifications are subject to change without notice. Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/15/15
Surface Mount Fuses
Nano2® > 600VDC > Fast-Acting Fuse > 485 Series
Average Time Current CurvesTemperature Re-rating Curve
TIME IN SECONDS
CURRENT IN AMPERES
0.001
0.01
0.1
1
10
100
0.1 1 10 100 100
0
2
A
1
.5
A
1
A
2.5A
3.15A
Reflow Condition Pb – Free Assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60 – 180 ses
Average Ramp-up Rate (Liquidus Temp
(TL) to peak) 5°C/second max.
TS(max) to TL - Ramp-up Rate 5°C/second max.
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)260+0/–5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max.
Time 25°C to peak Temperature (TP)8 minutes max.
Do not exceed 260°C
Soldering Parameters - Reflow Soldering
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/15/15
Surface Mount Fuses
Nano2® > 600VDC > Fast-Acting Fuse > 485 Series
Material Body: Ceramic
Cap: Silver Plated Brass
Product Marking Body: Brand Logo, Current Rating
Operating
Temperature -55˚C to 125˚C with proper derating
Moisture Sensitivity
Level Level 1 J-STD-020
Solderability MIL-STD-202, Method 208
Insulation
Resistance
(after Opening)
MIL-STD-202, Method 302,
Test Condition A (10,000 ohms,
Minimum)
Product Characteristics
Thermal Shock
MIL-STD-202, Method 107,
Test Condition B, 5 cycles, -65˚C to 125˚C,
15 minutes @ each extreme
Mechanical Shock
MIL-STD-202, Method 213,
Test Condition I: Deenergized. 100G’s
peak amplitude, sawtooth wave 6ms
duration, 3 cycles XYZ+xyz = 18 shocks
Vibratio
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2 hrs. each
XYZ=6hrs
Moisture
Resistance MIL-STD-202, Method 106, 10 cycles
Salt Spray MIL-STD-202, Method 101,
Test Condition B (48hrs)
Resistance to
Soldering Heat
MIL-STD-202, Method 210,
Test Condition B (10 sec at 260˚C)
Dimensions Part Numbering System
Packaging
Packaging Option Packaging Specification Quantity Ouantity & Option Code
24mm Tape and Reel EIA-RS 481-1, (IEC 286, Part 3 1500 DR
0485 3.15 D R
SERIES
QUANTITY Code
E = 1500 pieces
PACKAGING Code
*Example
R = Tape and Reel
3.15 amp is 04853.15DR
AMP Code*
Refer to Electrical
Characteristics Table
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