Littelfuse 0998080.UX-NH Automotive Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0998080.UX-NH is an 80 A automotive fuse rated for 70 V DC operation with slow-blow response characteristics. This MEGA® series fuse features bolt mount installation and is designed for automotive electrical circuit protection applications. The part maintains Active product status with 1068 units in current inventory stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product category, enabling direct functional replacement in automotive fuse applications without circuit redesign or performance degradation.

Key Parameters

Parameter	Value
Current Rating	80 A
Voltage Rating (DC)	70 V
Response Time	Slow Blow
Mounting Type	Bolt Mount
Package / Case	Auto Link
Breaking Capacity @ Rated Voltage	2.5 kA
Melting I²t	34900
Operating Temperature Range	-40°C ~ 125°C
DC Cold Resistance	0.0075 Ohms
Physical Dimensions	1.150" L x 0.750" W x 0.390" H (29.20mm x 19.05mm x 9.90mm)
Series	MEGA®
Fuse Type	Automotive
Color	Red
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the 0998080.UX-NH are identified based on strict electrical and mechanical parameter equivalence within the automotive fuse category. The substitution criteria are:

Electrical Parameters (Must Match Exactly):

Current Rating: 80 A
Voltage Rating (DC): 70 V
Response Time: Slow Blow
Breaking Capacity @ Rated Voltage: 2.5 kA
Melting I²t: 34900
DC Cold Resistance: 0.0075 Ohms

Mechanical Parameters (Must Match Exactly):

Mounting Type: Bolt Mount
Package / Case: Auto Link
Physical Dimensions: 1.150" L x 0.750" W x 0.390" H (29.20mm x 19.05mm x 9.90mm)

Environmental & Compliance Parameters (Must Match Exactly):

Operating Temperature Range: -40°C ~ 125°C
Series: MEGA®
Fuse Type: Automotive
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

All substitute parts listed maintain identical specifications across these parameters, ensuring direct functional and physical interchangeability in automotive circuit protection applications.

Parameter Comparison

Parameter	0998080.UX-NH	0998080.UX-2M6	0998080.UX-2M8
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	80 A	80 A	80 A
Voltage Rating - DC	70 V	70 V	70 V
Response Time	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Bolt Mount	Bolt Mount	Bolt Mount
Package / Case	Auto Link	Auto Link	Auto Link
Breaking Capacity @ Rated Voltage	2.5 kA	2.5 kA	2.5 kA
Melting I²t	34900	34900	34900
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
DC Cold Resistance	0.0075 Ohms	0.0075 Ohms	0.0075 Ohms
Size / Dimension	1.150" L x 0.750" W x 0.390" H (29.20mm x 19.05mm x 9.90mm)	1.150" L x 0.750" W x 0.390" H (29.20mm x 19.05mm x 9.90mm)	1.150" L x 0.750" W x 0.390" H (29.20mm x 19.05mm x 9.90mm)
Series	MEGA®	MEGA®	MEGA®
Fuse Type	Automotive	Automotive	Automotive
Color	Red	Red	Red
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active
Inventory (Pcs)	1068	1446	1212

Engineering Selection Recommendations

All three part numbers—0998080.UX-NH, 0998080.UX-2M6, and 0998080.UX-2M8—are functionally equivalent automotive fuses within the MEGA® series. Each maintains Active product status and full compliance with ROHS3 and REACH regulatory requirements.

Selection between these parts is based on availability and supply chain considerations rather than electrical or mechanical performance differences. All three parts deliver identical circuit protection characteristics for 80 A automotive applications at 70 V DC with slow-blow response.

The substitute parts 0998080.UX-2M6 and 0998080.UX-2M8 maintain higher current inventory levels (1446 and 1212 units respectively) compared to the primary part number 0998080.UX-NH (1068 units), providing alternative sourcing options for production and maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can 0998080.UX-2M6 or 0998080.UX-2M8 be used as direct replacements for 0998080.UX-NH?

A: Yes. Both substitute parts maintain identical electrical ratings (80 A, 70 V DC), response characteristics (slow-blow), mechanical dimensions (1.150" L x 0.750" W x 0.390" H), and mounting configuration (bolt mount auto link). Direct substitution is supported without circuit modification.

Q: Are there differences in breaking capacity or melting I²t between these parts?

A: No. All three part numbers share identical breaking capacity (2.5 kA @ rated voltage) and melting I²t (34900), ensuring equivalent fault protection performance.

Q: Do all three parts meet the same environmental and compliance standards?

A: Yes. Each part is ROHS3 compliant, REACH unaffected, and rated for operation across -40°C to 125°C. All maintain the same DC cold resistance (0.0075 Ohms) and automotive fuse classification.

Q: What is the difference between these part numbers if all specifications are identical?

A: The part numbers represent different manufacturing batches or packaging configurations within the same product line. Electrical and mechanical specifications remain equivalent across all three designations.

Q: Can these fuses be used interchangeably in existing automotive circuits?

A: Yes. The identical bolt mount configuration, auto link package type, and physical dimensions (29.20mm x 19.05mm x 9.90mm) enable direct installation in existing fuse holders without mechanical modification.

Q: Are there any inventory or lead time considerations when selecting between these parts?

A: Current inventory levels differ: 0998080.UX-2M6 (1446 units), 0998080.UX-2M8 (1212 units), and 0998080.UX-NH (1068 units). Selection may be influenced by supply availability for specific procurement timelines.

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