Axial Lead & Cartridge Fuses
5×20 mm > Fast-Acting > 487 Series
487 Series, 5×20 mm, Fast-Acting Fuse
Description
RoHS
Pb
Agency Approvals
Agency
Agency File Number
E10480
The 487 Series is a 420VAC/420VDC rated 5x20mm fast-
acting ceramic body fuse, designed to ensure the best
coordination between a power supply unit (PSU) and an
electrical circuit breaker panel during short-circuit and over-
current faults. When installed in a PSU, the 487 series
fuse opens faster than the circuit breaker and removes
the problematic PSU while preventing the circuit breaker
from shutting down other critical systems. With 420VAC
characteristics, the 487 Series is well suited for high-
energy applications like 3-phase power supplies, inverters,
and ballasts. With 420VDC characteristics, it is optimal
for high-voltage DC power grid in data centers, telecom
applications, and intelligent commercial buildings.
Ampere Range
8 - 20A
Features
•
•
Lower I
2
t and faster
tripping
High current ratings up
to 20A in a 5x20mm
footprint
•
•
•
Rated voltage @ 420VAC,
420VDC
Available in cartridge and
axial leaded versions
RoHS compliant and
Lead-free
J 50293210
8 - 20A
Electrical Characteristics for Series
% of Ampere
Rating
100%
210%
275%
400%
1000%
Applications
• Telecom power supplies
• Data center server power supplies
• Higher energy and power efficient applications
Opening Time
60 minutes, Minimum
30 minutes, Maximum
0.04 sec., Min.; 20 sec. Max.
0.01 sec., Min.; 1.0 sec. Max.
0.03 sec., Max.
Additional Information
Datasheet
Resources
Samples
© 2017 Littelfuse, Inc.
Application testing is strongly recommended. Specifications are subject to change without notice.
Revised: 04/12/17
Axial Lead & Cartridge Fuses
5×20 mm > Fast-Acting > 487 Series
Electrical Characteristic Specifications by Item
Nominal
Nominal Melting
Cold Resistance
I
2
t (A
2
sec.)
(Ohms)
0.0134
0.0093
420VDC
420VAC
300A@420VDC
200A@420VAC
0.0078
0.0075
0.0064
0.0043
65
130
170
190
260
390
Agency Approvals
Amp Code
Amp Rating
Max Voltage
Rating (V)
Interrupting
Rating
008.
010.
12.5
015.
016.
020.
8
10
12.5
15
16
20
x
x
x
x
x
x*
x
x
x
x
x
x
* Additional 750A@250VAC interrupting rating for 20A.
Temperature Rerating Curve
Average Time Current Curves
8A
10A
12.5A
15A
16A
20A
10000
1000
100
TIME IN SECONDS
10
1
0.1
0.01
0.001
1
10
CURRENT (Amps)
100
1000
Note:
Rerating depicted in this curve is in addition to the standard derating of 25%
for continuous operation.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/12/17
Axial Lead & Cartridge Fuses
5×20 mm > Fast-Acting > 487 Series
Soldering Parameters - Wave Soldering
300
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux Activation Temperature)
(Typical Industry Recommendation)
Temperature (°C) - Measured on bottom side of board
280
260
240
220
200
180
160
140
120
100
80
60
40
20
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
10
20
30
40
50
60
70
80
90
0
0
Lead-Free Recommendation
Temperature Minimum:
Temperature Maximum:
Preheat Time:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
260
°
C Maximum
2-5 seconds
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.
Time (Seconds)
Preheat Time
Dwell Time
Cooling Time
Product Characteristics
Materials
Terminal Strength
Solderability
Product Marking
Body:
Ceramic
Cap:
Nickel–plated Brass
Leads:
Tin–plated Copper
MIL-STD-202, Method 211, Test Condition
A
MIL-STD-202 Method 208
Cap 1:
Brand logo, current and voltage
ratings
Cap 2:
Series and agency approval
markings
Operating Temperature
Thermal Shock
Vibration
Moisture Resistance
Salt Spray
–55ºC to +125ºC
MIL
-STD-202, Method 107 Test
,
Condition B
MIL
-STD-202, Method 201
MIL
-STD-202, Method 103, Test
Condition A
MIL
-STD-202, Method 101, Test
Condition B
Dimensions
All dimensions in mm
Part Numbering System
0487 xxxx M X E P
20±0.5
5.2+0.1/-0.2
5.1±0.6
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
40.00±1.0
21.5±1.0
5.5±0.3
Quantity Code
M = 1000
Packaging Code
X = Filler
ø1.00±0.05*
Note:
*Rating of 20A has 1.20±0.05 diameter lead
Option Code
Blank: Cartridge Type Fuse
E = Axial Leaded Fuse
P: Lead-Free
Packaging
Packaging Option
487 Series
Bulk
Bulk
N/A
N/A
1000
1000
MX
MXE
N/A
N/A
Packaging Specification
Quantity
Quantity &
Packaging Code
Reel Size
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/12/17
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