Littelfuse 0388010.MXEP Glass Cartridge Fuse 10A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0388010.MXEP is a 10A 250VAC glass cartridge fuse with 3AB/3AG package configuration, designed for through-hole mounting in electrical protection circuits. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The fuse provides fast-blow response characteristics with a breaking capacity of 100A at rated voltage and operates across a temperature range of -55°C to 125°C.

Substiute Parts

0388010.MXEP

Littelfuse Inc.In Stock: 8970388010.MXEP Datasheet

Current PartRFQ

0318010.HXP

Littelfuse Inc.In Stock: 115720318010.HXP Datasheet

DirectRFQ

0318010.MXP

Littelfuse Inc.In Stock: 12360318010.MXP Datasheet

Parametric EquivalentRFQ

0318010.VXP

Littelfuse Inc.In Stock: 9420318010.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0388010.MXEP are qualified based on the following critical parameters that determine functional interchangeability:

Mandatory Matching Parameters:

• Current Rating: 10 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 125°C
• Size / Dimension: 0.275" Dia x 1.288" L (6.99mm x 32.72mm)

All substitute parts listed below meet these mandatory parameters. Variations in breaking capacity, melting I²t, DC cold resistance, and approval agencies do not affect functional substitution within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (0318010.HXP, 0318010.MXP, 0318010.VXP) are direct functional equivalents to the obsolete 0388010.MXEP. Selection among these active alternatives should be based on the following criteria:

Product Availability: All substitute parts are classified as active products with current manufacturing status. The 0318010.HXP variant offers the highest inventory availability at 11,500 pieces, followed by 0318010.MXP at 1,211 pieces and 0318010.VXP at 881 pieces.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and expand approval agency coverage to include CSA, KC, and UL certifications in addition to the CE and PSE certifications present on the main part. This expanded certification profile supports broader application requirements.

Electrical Performance: The substitute parts feature a higher breaking capacity of 200A compared to the main part's 100A, providing enhanced protection margin. The melting I²t value of 298 on all substitutes exceeds the main part's 234.6, indicating slightly slower thermal response. DC cold resistance increases from 0.0072 Ohms to 0.0093 Ohms across all substitutes.

Mechanical Compatibility: All substitute parts maintain identical package dimensions, mounting type, and through-hole configuration, ensuring direct mechanical interchangeability without circuit board modifications.

Frequently Asked Questions (FAQ)

Q: Can 0318010.HXP, 0318010.MXP, and 0318010.VXP be used interchangeably with 0388010.MXEP?

A: Yes. All three substitute parts meet the mandatory electrical and mechanical parameters: 10A current rating, 250V AC voltage rating, fast-blow response, 3AB/3AG package configuration, and identical physical dimensions. They are functionally equivalent for circuit protection applications.

Q: What is the difference between the three substitute parts?

A: The three substitute parts are parametrically identical in all critical electrical and mechanical specifications. Differences exist only in packaging type (all are bulk), inventory levels, and series designation (318 vs. 388). Selection can be based on availability and supply chain requirements.

Q: Why do the substitute parts have higher breaking capacity (200A vs. 100A)?

A: The increased breaking capacity of 200A on the substitute parts provides enhanced protection margin and improved safety performance. This does not affect functional substitution, as the fuse will still operate at the specified 10A current rating and 250V voltage rating.

Q: Are there any temperature or environmental limitations when using substitute parts?

A: No. All substitute parts maintain the same operating temperature range of -55°C to 125°C as the main part. Environmental performance is equivalent across all variants.

Q: Do the substitute parts have different approval certifications?

A: The substitute parts carry expanded regulatory approvals (CE, CSA, KC, PSE, UL) compared to the main part (CE, K-MARK, PSE). This broader certification profile supports applications requiring additional regulatory compliance without limiting functionality.

Q: What is the impact of the higher DC cold resistance on circuit performance?

A: The DC cold resistance increase from 0.0072 Ohms to 0.0093 Ohms is within acceptable tolerance for cartridge fuse applications and does not affect circuit protection performance at the specified 10A rating.