Littelfuse 0232008.M Glass Cartridge Fuse 8A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232008.M is an 8A 250VAC glass cartridge fuse with a 5x20mm form factor, designed for medium-blow response applications requiring a holder for installation. This part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing system support and procurement planning. The fuse provides 100A breaking capacity at rated voltage with a melting I²t of 187.5, suitable for general-purpose circuit protection in AC and DC applications across the -55°C to 125°C operating temperature range.

Substiute Parts

0232008.M

Littelfuse Inc.In Stock: 12100232008.M Datasheet

Current PartRFQ

0232008.MXP

Littelfuse Inc.In Stock: 21600232008.MXP Datasheet

Parametric EquivalentRFQ

MSC-8A

OptiFuseIn Stock: 3237MSC-8A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 0232008.M is determined by strict equivalence across the following critical parameters: current rating (8A), voltage rating (250VAC), fuse type (cartridge glass), physical dimensions (5x20mm), response time (medium blow), and breaking capacity (100A). All identified substitutes maintain these core electrical and mechanical specifications, ensuring direct functional replacement without circuit redesign or holder modification.

The two substitute parts identified—Littelfuse 0232008.MXP and OptiFuse MSC-8A—meet all mandatory substitution criteria. Both are active products with current manufacturing status, addressing the obsolescence of the original part.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 0232008.M, the Littelfuse 0232008.MXP is the primary equivalent. This part maintains identical electrical specifications and physical form factor while offering active product status and ROHS3 compliance with CE, KC, and PSE certifications. The melting I²t value of 182.58 is within acceptable tolerance of the original 187.5.

The OptiFuse MSC-8A provides an alternative substitute with active product status and cULus/UL 248 certifications. The melting I²t of 167 represents a lower value compared to the original specification; however, all other critical parameters remain equivalent. This part is suitable for applications where UL 248 certification is required.

Both substitutes are compatible with existing 5x20mm fuse holders and require no circuit modifications. Selection between the two should be based on specific regulatory requirements and certification preferences for the end application.

Frequently Asked Questions (FAQ)

Q: Can the 0232008.MXP directly replace the obsolete 0232008.M?

A: Yes. The 0232008.MXP is a parametric equivalent with identical current rating (8A), voltage rating (250VAC), fuse type (cartridge glass), physical dimensions (5x20mm), response time (medium blow), and breaking capacity (100A). No holder modification is required.

Q: What is the difference between the Littelfuse 0232008.MXP and OptiFuse MSC-8A?

A: Both parts meet all mandatory substitution criteria. The primary differences are manufacturer, approval agencies (Littelfuse: CE/KC/PSE; OptiFuse: cULus/UL 248), and melting I²t values (182.58 vs. 167). Selection depends on regulatory requirements for your application.

Q: Are there compatibility concerns with existing 5x20mm fuse holders?

A: No. All three parts share identical physical dimensions (5mm diameter x 20mm length) and mounting type (requires holder). They are mechanically interchangeable in any standard 5x20mm fuse holder.

Q: Why does the original part show RoHS non-compliance?

A: The 0232008.M is an obsolete part predating current RoHS3 requirements. Both active substitutes (0232008.MXP and MSC-8A) are ROHS3 compliant, meeting current environmental standards.

Q: What does melting I²t indicate, and why do the values differ?

A: Melting I²t is a thermal characteristic indicating the fuse element's energy absorption capacity before melting. Variations (187.5, 182.58, 167) reflect manufacturing differences between parts but remain within acceptable tolerance for 8A medium-blow cartridge fuses. All three parts maintain the same response time classification.