Littelfuse 0498030.M MIDI® 498 30A 32VDC Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0498030.M is a 30A automotive fuse rated for 32VDC operation, designed for bolt mount installation with Auto Link package configuration. This slow-blow fuse is part of the MIDI® 498 series and maintains active product status with full RoHS3 compliance. Finding equivalent substitute parts is necessary to ensure supply chain flexibility, manage inventory across multiple procurement channels, and maintain design compatibility when the primary part number becomes unavailable.

Substiute Parts

0498030.M

Littelfuse Inc.In Stock: 15670498030.M Datasheet

Current PartRFQ

0498030.H

Littelfuse Inc.In Stock: 9330498030.H Datasheet

Parametric EquivalentRFQ

0498030.MX1M6

Littelfuse Inc.In Stock: 8780498030.MX1M6 Datasheet

Parametric EquivalentRFQ

0498030.MXT

Littelfuse Inc.In Stock: 16970498030.MXT Datasheet

Parametric EquivalentRFQ

0498030.TXN

Littelfuse Inc.In Stock: 7390498030.TXN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All substitute parts for the Littelfuse 0498030.M maintain identical electrical and mechanical specifications across the critical parameters that determine functional interchangeability. Substitution is based on the following criteria:

Electrical Parameters (Must Match):

• Current Rating: 30 A
• Voltage Rating (DC): 32 V
• Response Time: Slow Blow
• Breaking Capacity @ Rated Voltage: 1 kA

Mechanical Parameters (Must Match):

• Mounting Type: Bolt Mount
• Package / Case: Auto Link
• Size / Dimension: 1.614" L × 0.472" W × 0.315" H (41.00mm × 12.00mm × 8.00mm)

Environmental & Compliance Parameters (Must Match):

• Operating Temperature Range: -40°C to 125°C
• RoHS Status: ROHS3 Compliant
• Series: MIDI® 498

The four substitute part numbers (0498030.H, 0498030.MX1M6, 0498030.MXT, 0498030.TXN) are parametric equivalents that satisfy all mandatory electrical, mechanical, and environmental requirements. Variations in DC Cold Resistance (0.00206 Ohms vs. 0.0021 Ohms), color designation, and approval agency certifications do not affect functional interchangeability within automotive fuse applications.

Parameter Comparison

Engineering Selection Recommendations

All five part numbers (0498030.M, 0498030.H, 0498030.MX1M6, 0498030.MXT, 0498030.TXN) are active products manufactured by Littelfuse Inc. and maintain full ROHS3 compliance. Selection among these equivalents should be based on:

Availability & Inventory: Part 0498030.MXT offers the highest current inventory at 1621 pieces, followed by 0498030.M at 1525 pieces. Parts 0498030.H, 0498030.MX1M6, and 0498030.TXN have lower inventory levels (854, 807, and 706 pieces respectively).

Certification Requirements: Part 0498030.MX1M6 carries UR approval agency certification. Parts 0498030.M, 0498030.H, 0498030.MXT, and 0498030.TXN do not specify approval agency certifications. If UR certification is a design requirement, 0498030.MX1M6 is the appropriate selection.

Resistance Characteristics: Part 0498030.M specifies 0.0021 Ohms DC cold resistance, while substitute parts 0498030.H, 0498030.MX1M6, 0498030.MXT, and 0498030.TXN specify 0.00206 Ohms. This minor variation (approximately 1.9% difference) does not affect functional performance in automotive fuse applications.

Frequently Asked Questions (FAQ)

Q: Can 0498030.H be used as a direct replacement for 0498030.M?

A: Yes. Both parts share identical electrical ratings (30A, 32VDC), response characteristics (Slow Blow), mechanical configuration (Bolt Mount, Auto Link package), and physical dimensions (41.00mm × 12.00mm × 8.00mm). The DC cold resistance difference (0.00206 Ohms vs. 0.0021 Ohms) is within acceptable tolerance for automotive fuse applications.

Q: What is the difference between 0498030.MXT and 0498030.TXN?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary distinction is inventory availability, with 0498030.MXT maintaining 1621 pieces in stock compared to 0498030.TXN at 706 pieces.

Q: Does the color designation affect part interchangeability?

A: No. Color designation (Orange for 0498030.MX1M6, 0498030.MXT, and 0498030.TXN; unspecified for 0498030.M and 0498030.H) is a visual identifier only and does not affect electrical or mechanical performance. All parts are functionally interchangeable.

Q: Is 0498030.MX1M6 required if UR certification is specified in the design?

A: Yes. If the design documentation specifies UR approval agency certification, 0498030.MX1M6 is the appropriate selection, as it is the only substitute part carrying UR certification.

Q: Can these fuses be used interchangeably in automotive 32VDC circuits?

A: Yes. All five part numbers meet the same electrical specifications (30A, 32VDC, Slow Blow response, 1kA breaking capacity) and mechanical requirements (Bolt Mount, Auto Link package, identical dimensions). They are suitable for direct substitution in automotive 32VDC fuse applications.

Q: What is the significance of the Melting I²t value listed for substitute parts?

A: The Melting I²t value (4200) provided for substitute parts 0498030.H, 0498030.MX1M6, 0498030.MXT, and 0498030.TXN characterizes the thermal energy required to melt the fuse element. This parameter is not specified for 0498030.M but does not indicate a functional difference, as all parts maintain identical slow-blow response characteristics and breaking capacity.