Littelfuse 0239003.VXP Glass Cartridge Fuse 3A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0239003.VXP is a 3 A, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor. This fuse requires a holder for installation and is designed for circuit protection in industrial and commercial applications. The part maintains active product status with full compliance to international safety standards including CE, CSA, KC, PSE, and UL certifications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and regulatory approvals to ensure direct interchangeability in existing fuse holder assemblies.

Substiute Parts

0239003.VXP

LittelfuseIn Stock: 10760239003.VXP Datasheet

Current PartRFQ

0239003.HXP

Littelfuse Inc.In Stock: 28370239003.HXP Datasheet

Parametric EquivalentRFQ

0239003.MXP

Littelfuse Inc.In Stock: 25960239003.MXP Datasheet

Parametric EquivalentRFQ

0239003.TXP

Littelfuse Inc.In Stock: 10020239003.TXP Datasheet

Parametric EquivalentRFQ

TSC-3A

OptiFuseIn Stock: 8382TSC-3A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0239003.VXP are qualified based on the following critical parameters:

• Current Rating: 3 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Physical Dimensions: 5mm x 20mm (exact match required)
• Breaking Capacity: 100 A minimum at rated voltage
• Operating Temperature: -55°C to 125°C (minimum range required)
• Regulatory Compliance: Active product status with recognized safety certifications

All identified substitutes meet these criteria and are suitable for direct replacement in applications requiring 3 A, 250 V AC/DC slow-blow fuse protection in standard 5x20mm fuse holders.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and meet the electrical and mechanical requirements for direct replacement in 5x20mm fuse holder assemblies rated for 3 A, 250 V AC/DC protection.

Littelfuse variants (0239003.HXP, 0239003.MXP, 0239003.TXP): These parts are manufactured by Littelfuse Inc. and carry identical electrical specifications, dimensional tolerances, and approval certifications (CE, CSA, KC, PSE, UL) as the primary part 0239003.VXP. These variants differ only in packaging or internal manufacturing specifications and are fully interchangeable.

OptiFuse TSC-3A: This part is manufactured by OptiFuse and meets all critical electrical parameters and physical dimensions. It carries UL 248 and cULus certifications, which satisfy the primary safety requirements for this fuse category. The TSC-3A is suitable for applications where OptiFuse product qualification is acceptable.

Selection between these substitutes should be based on availability, supply chain requirements, and any specific manufacturer preferences established in the application design documentation.

Frequently Asked Questions (FAQ)

Q: Can 0239003.HXP, 0239003.MXP, and 0239003.TXP be used interchangeably with 0239003.VXP?

A: Yes. All three Littelfuse variants share identical electrical ratings (3 A, 250 V AC/DC), response characteristics (slow-blow), physical dimensions (5mm x 20mm), breaking capacity (100 A), and regulatory certifications. They are direct substitutes for the 0239003.VXP in any application using a standard 5x20mm fuse holder.

Q: Is the OptiFuse TSC-3A compatible with applications designed for the Littelfuse 0239003.VXP?

A: Yes. The TSC-3A matches all critical electrical and mechanical parameters: 3 A current rating, 250 V AC voltage rating, slow-blow response, 5x20mm form factor, and 100 A breaking capacity. It carries UL 248 and cULus certifications. Compatibility depends on whether OptiFuse products are approved for use in the specific application or system design.

Q: What are the key parameters that determine if a fuse can substitute for the 0239003.VXP?

A: The following parameters must match exactly: current rating (3 A), AC voltage rating (250 V), fuse type (cartridge, glass), response time (slow-blow), physical dimensions (5mm x 20mm), and breaking capacity (100 A minimum). Operating temperature range must support -55°C to 125°C. The substitute must also maintain active product status and carry recognized safety certifications.

Q: Are there any differences in the melting I²t values between the Littelfuse variants and the OptiFuse TSC-3A?

A: The Littelfuse variants (0239003.HXP, 0239003.MXP, 0239003.TXP) specify a melting I²t of 129.51, while the OptiFuse TSC-3A specifies 14.15. Both values fall within acceptable ranges for 3 A slow-blow fuses and do not affect interchangeability for standard circuit protection applications. The difference reflects different manufacturing processes between manufacturers.

Q: Do all substitute parts require the same fuse holder as the 0239003.VXP?

A: Yes. All substitute parts are cartridge-type fuses with identical 5mm x 20mm dimensions and require a standard 5x20mm fuse holder. No holder modifications or adaptations are necessary when switching between any of these parts.

Q: What certifications should I verify before selecting a substitute?

A: Verify that the substitute carries certifications required by your application's regulatory framework. The Littelfuse variants carry CE, CSA, KC, PSE, and UL certifications. The OptiFuse TSC-3A carries cULus and UL 248 certifications. Confirm that these certifications meet your system's compliance requirements.