MEGA
®
+ Series
Bolt-down Fuses – Rated 32 V DC
Fuse Datasheet
1
©2024 Littelfuse, Inc.
Specifications are subject to change without notice.
R
evised: 03/29/2024
Additional Information
Specications
Cars / SUVs
Trucks
Offroad vehicles
Buses
Watercraft as approved by
Littelfuse
®
See Disclaimer Notice
Ordering Information
Features & Benets
Applications
SamplesResources
Description
The MEGA+
®
Fuse is designed for high current circuit protection up to
650A with “Diffusion Pill Technology.” The MEGA+
®
Fuse also provides
time delay characteristics. Designed and patented by Littelfuse, the
MEGA+
®
Fuse is ideal for battery and alternator protection application
and other heavy gauge cables requiring ultrahigh current protection.
Part Name Part Number Current Rating (A) Termination Bolt Hole Qty. Package Size
0298xxx.UXP-2M8
80 A - 500 A
M8 Bolt Down 2 500
0298xxx.UXP-1M8
80 A - 500 A
M8 Bolt Down 1 500
0298xxx.UXP-2M6
80 A - 500 A
M6 Bolt Down 2 500
0298xxx.UXP-1M6
80 A - 500 A
M6 Bolt Down 1 500
0298xxx.UXP-NH
80 A - 500 A
- - 500
MEGA+ 650 A
0298650.U-2M8 650 A M8 Bolt Down 2 500
0298650.U-2M6 650 A M6 Bolt Down 2 500
Mounting Torque M6 of 9 ±1
Nm (Max. allowed 14 Nm)
Mounting Torque M8 of 12
±1 Nm (Max. allowed 18 Nm)
High-contrast color coding
on housing aids identification
Terminals in tin plated
copper alloy
Housing in PET-GF30FR
(U.L.94 Flammability rating - V0)
Refers to ISO 8820-5
Voltage Rating: 32 V DC
Interrupting Rating: 2000 A @ 32 V DC
Recommended Environmental
Temperature:
–40 ˚C to +125 ˚C
Terminals Material: Tin-plated copper alloy
Housing Material: PET-GF30FR
(UL 94 Flammability rating of V0)
Typical Weight per Fuse: 12.0 g
Mounting Torque M6: 9 Nm ± 1 Nm (Max. allowed 14 Nm)
Mounting Torque M8: 12 Nm ± 1 Nm (Max. allowed 18 Nm)
Refer to: ISO 8820-5
MEGA+
MEGA
®
+ Series
Bolt-down Fuses – Rated 32 V DC
Fuse Datasheet
2
©2024 Littelfuse, Inc.
Specifications are subject to change without notice.
R
evised: 03/29/2024
Ratings
Dimensions
Dimensions in mm. Please refer to the outline drawing for dimensions and tolerances.
Part Number
Current
Rating (A)
Color
Coding
4
Test Cable Size
(mm
2
)
Typ. Voltage Drop
at 100% Ir (mV)
Typ. Cold
Resistance (mΩ)
Typ. I
2
t
(A
2
s)
0298080._ 80 10 77 0.66 22 900
02980100._ 100 16 86 0.55 27 600
02980125._ 125 16 79 0.41 78 000
02980150._ 150 25 91 0.34 97 300
02980175._ 175 25 77 0.28 205 500
02980200._ 200 35 93 0.26 245 800
02980225._ 225 35 84 0.21 135 300
02980250._ 250 50 86 0.19 176 200
02980300._
2
300 70 45
3
0.16 378 900
02980350._
2
350 70 48
3
0.13 573 000
02980400._
2
400 70 52
3
0.12 844 400
02980450._
2
450 70 58
3
0.11 1 323 600
02980500._
2
500 70 58
3
0.09 1 850 200
02980650._
1,
2
650 95 55
3
0.07 4 202 800
1: Not mentioned in ISO standards
2: Short Circuit Protector only
3: Voltage Drop measurements for short circuit protectors taken at 75% of rated current.
4: Color Code Applicable for the UXP-2M8 and UXP-2M6 versions only - Not applicable for UXP-1M6, UXP-1M8 and UXP-NH clinch versions that have the High Contrast Mark (White Color Only).
Note: The typical I
2
t is an average value calculated from the breaking capacity tests by using the melting time before the arcing occurs.
Marking Type “A”: Color Code Rating Mark Applicable for the UXP-
2M8 and UXP-2M6 versions only
Marking Type “C”: Color Code Bar Hot Stamped applicable for
U-2M8 and U-2M6 versions (650 A fuse rating) on one side only
Marking Type “B”: High Contrast Mark (White Color Only - No Color
Code) applicable for UXP-1M6, UXP-1M8 and UXP-NH clinch versions
UXP-1M6 & UXP-1M8 versions
UXP-NH version
U-2M6 & U-2M8 versions