© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/15/19
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 505 Series
505 Series, Lead-free 3AB, Fast-Acting Fuse
Pb
RoHS
A 500VAC/VDC rated ceramic fuse with a 20,000
interrupting rating in a compact 6.3 x 32mm package,
which is well suited for circuit protection in high energy
applications.
Agency Approvals
Agency Agency File Number Ampere Range
E10480 10A - 30A
1620079 10A - 12A
T5026910801 15A - 30A
N/A 10A - 30A
Features
Applications
Electrical Characteristics for Series
% of Ampere
Rating Ampere Rating Opening Time
150%
10A - 30A
30 minutes, Maximum
200% 30 minutes, Maximum
300% 10 seconds, Maximum
• In accordance
with Underwriters
Laboratories Standard
UL 248-14
• Available in cartridge and
axial lead form and with
various lead forming
dimensions.
• RoHS compliant and
Lead-free
• Interrupting rating of
20,000 Amperes
• Compact form factor of
6.3mm x 32mm
• Uninterruptible Power
Supplies (UPS)
• Three-Phase Power
Supplies
Description
Amp Code Ampere
Rating
(A)
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2 sec)
Agency Approvals
010. 10 450 20kA@450VAC
1000A@250VDC 0.0167 91 x x - x
010.*10 500 200A@500VAC
200A@500VDC 0.0167 91 x - - x
012. 12 450 20kA@450VAC
1000A@250VDC 0.0117 192 x x - x
015. 15 500 50kA@500VAC
20kA@500VDC
0.0073 68 x - x x
016. 16 500 0.0073 68 x - x x
020. 20 500 30kA@500VAC
20kA@500VDC
0.0056 140 x - x x
025. 25 500 0.0048 210 x - x x
030. 30 500 0.0038 280 x - x x
Electrical Characteristic Specifications by Item
Notes:
1. 20kA @ 500VAC and 20kA @ 500VDC interrupting rating available for TUV certification of 15A - 30A
2. *200A @ 500VAC and 200A @ 500VDC interrupting rating available for 10A. Add suffix “500”. Example: 0505010.MX500P, and 0505010.MXE500P”
Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources Accessories
For recommended fuse accessories for this product series,
see ‘Recommended Accessories’ section.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/15/19
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 505 Series
0.001
0.01
0.1
1
10
100
1000
10000
0.01 0.1110 10
01
000
12A
15A
20
A
25A
30A
16A
10A
TIME IN SECONDS
CURRENT IN AMPERES
Soldering Parameters - Wave Soldering
Dwell Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
Time (Seconds)
Temperature (°C) - Measured on bottom side of board
Cooling Time
Preheat Time
Temperature Re-rating Curve Average Time Current Curves
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature) (Typical Industry Recommendation)
Temperature Minimum: 100° C
Temperature Maximum: 150°C
Preheat Time: 60-180 seconds
Solder Pot Temperature: 270°C
Solder Dwell Time: 10 seconds Maximum
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.
Recommended Process Parameters:
Note:
Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/15/19
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 505 Series
Packaging
Option Packaging
Specification Quantity Quantity &
Packaging
Code
Reel
Size
505 Series
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MXE N/A
Bulk N/A 1000 MX52LE N/A
Packaging
Product Characteristics
Materials Body : Ceramic
Cap : Nickel–plated brass
Leads : Tin-plated Copper
Terminal Strength MIL-STD-202, Method 211,
Test Condition A
Solderability MIL-STD-202 Method 208
Product Marking Cap1 : Brand logo, current and voltage
ratings
Cap2 : Series and agency approval marks
Operating
Temperature:
–55ºC to 125ºC.
Thermal
Shock:
MIL-STD-202, Method 107, Test Condition B
(5 Cycles -65ºC to +125ºC).
Vibration MIL-STD-202, Method 201
Humidity MIL-STD-202, Method 103, Test Condition A:
High relative humidity (95%) and elevated
temp (40ºC) for 240 hours
Salt Spray MIL-STD-202, Method 101, Test Condition B
0505 xxxx MX E
Series
Quantity Code
M = 1000
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Option Codes
E : Axial Leaded
52LE : 52mm length
Others : special options.
Please call Littelfuse for detail.
Blank : Cartridge
Lead-Free
Packaging Code
X = Filler
P
Part Numbering System
505 000P Series
(cartridge) 505 000P Series
(axial leaded)
6.35±0.3
(.25")
32.72±1.12
(1.288")
31.75±1.12
(1.25")
6.985±0.3
(.275")
Axial Lead Diameter:
0.81±0.05 (.032") for
(10A - 16A)
1.02±0.06 (.040") for
(20A - 30A)
Axial Lead Length:
38.1±3.15 (1.50") TYP.
52±1 (2.0") for long lead
Axial Lead Material:
Tin-coated copper
Dimensions
Measurements displayed in millimeters (inches)
Recommended Accessories
Accessory
Type Series Description Max
Application
Voltage
Max
Application
Amperage
Holder 150322 In-Line Fuseholder 500 15
Block 354 Low Profile OMNI-BLOK® Fuse Block 600 30
359 High Current Screw Terminal Fuse Block 30
Clip 122 High Current Traditional PC Board Fuse Clip 1000 30
101 Rivet/Eyelet Type Fuse Clip 1000 15
Notes:
1. Do not use in applications above rating.
2. Please refer to fuseholder data sheet for specific re-rating information.
3. Please contact factory for applications greater than the max voltage and amperage shown.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete
Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.
