Littelfuse 0232004.MXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0232004.MXP is a 4A 250VAC glass cartridge fuse designed for circuit protection in applications requiring medium-blow response characteristics. This fuse operates within a temperature range of -55°C to 125°C and is housed in a standard 5mm x 20mm form factor that requires a compatible holder for installation. The part maintains Active product status and is RoHS3 compliant with full regulatory approvals including CE, KC, and PSE certifications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to alternative inventory sources when the primary part becomes unavailable.

Substiute Parts

0232004.MXP

Littelfuse Inc.In Stock: 7780232004.MXP Datasheet

Current PartRFQ

MSC-4A

OptiFuseIn Stock: 4224MSC-4A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0232004.MXP are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

• Current Rating: 4 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Medium Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 100A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Mounting Type: Requires Holder (exact match required)

The OptiFuse MSC-4A meets all these criteria and qualifies as a parametric equivalent substitute part.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0232004.MXP and OptiFuse MSC-4A are Active products with full regulatory compliance. The Littelfuse part carries CE, KC, and PSE approvals, while the OptiFuse part carries cULus and UL 248 approvals. Both parts are RoHS3 compliant and REACH unaffected. Selection between these parts should be based on specific application certification requirements and inventory availability. The OptiFuse MSC-4A currently maintains higher inventory levels (4176 pcs vs. 687 pcs), which may provide supply chain advantages for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the OptiFuse MSC-4A be used as a direct replacement for the Littelfuse 0232004.MXP?

A: Yes. Both parts share identical electrical ratings (4A, 250VAC), fuse type (cartridge, glass), response time (medium blow), physical dimensions (5mm x 20mm), breaking capacity (100A), and operating temperature range (-55°C to 125°C). Both require a compatible holder for installation.

Q: Are there differences in regulatory approvals between these parts?

A: Yes. The Littelfuse 0232004.MXP carries CE, KC, and PSE approvals. The OptiFuse MSC-4A carries cULus and UL 248 approvals. Application-specific certification requirements should determine which part is appropriate for your design.

Q: What is the difference in melting I²t values between these parts?

A: The Littelfuse 0232004.MXP has a melting I²t of 37.73, while the OptiFuse MSC-4A has a melting I²t of 33.47. Both parts maintain the same current rating and response time classification.

Q: Do both parts require the same holder type?

A: Yes. Both parts are 5mm x 20mm cartridge fuses that require a compatible holder for installation. Existing holder hardware is interchangeable between these parts.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the Littelfuse 0232004.MXP and OptiFuse MSC-4A are RoHS3 compliant and REACH unaffected.