Littelfuse 0322020.VXP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0322020.VXP is a 20A ceramic cartridge fuse rated for 65V AC/DC operation. This fast-blow fuse is designed for applications requiring reliable overcurrent protection in industrial and commercial equipment. The part is actively manufactured and maintained in production status, ensuring long-term availability and supply chain stability. Identifying equivalent substitute parts is essential for procurement flexibility, inventory management, and continuity of supply across manufacturing operations.

Substiute Parts

0322020.VXP

Littelfuse Inc.In Stock: 11900322020.VXP Datasheet

Current PartRFQ

0322020.HXP

Littelfuse Inc.In Stock: 21740322020.HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0322020.VXP is determined by strict equivalence across the following critical parameters:

• Current Rating: 20 A (exact match required)
• Voltage Rating: 65V AC and 65V DC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Breaking Capacity: 200A AC, 1kA DC (exact match required)
• Melting I²t: 192 (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Approval Agencies: CE, UL (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Only parts meeting all these criteria are classified as direct parametric equivalents and may be substituted without circuit redesign or application re-qualification.

Parameter Comparison

Engineering Selection Recommendations

Both the 0322020.VXP and 0322020.HXP are actively manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications. Both parts carry CE and UL approvals, confirming compliance with international safety standards. Both are ROHS3 compliant, meeting environmental regulatory requirements.

Selection between these two parts may be based on inventory availability and procurement lead times. The 0322020.HXP currently maintains higher stock levels (2130 pcs vs. 1116 pcs), which may provide supply chain advantages for high-volume applications or time-sensitive procurement scenarios.

Frequently Asked Questions (FAQ)

Q: Can the 0322020.HXP be used as a direct replacement for the 0322020.VXP?

A: Yes. Both parts are parametrically identical across all critical electrical and mechanical specifications, including current rating, voltage rating, response time, package dimensions, breaking capacity, and thermal operating range. No circuit modification or re-qualification is required.

Q: Are there any differences in approval certifications between these parts?

A: No. Both parts carry identical CE and UL approvals and are ROHS3 compliant. Regulatory compliance is equivalent.

Q: What determines whether a fuse can be substituted in this application?

A: Substitution eligibility requires exact matching of current rating (20A), voltage ratings (65V AC/DC), fuse type (ceramic cartridge), response time (fast blow), package dimensions (3AB, 3AG, 1/4" x 1-1/4"), breaking capacity (200A AC, 1kA DC), melting I²t (192), and operating temperature range (-55°C to 125°C).

Q: Do these fuses require a specific holder?

A: Yes. Both fuses require a compatible holder designed for 3AB, 3AG, or 1/4" x 1-1/4" cartridge fuses. The fuse itself is a cartridge element and cannot be used without an appropriate holder assembly.

Q: What is the significance of the melting I²t value?

A: The melting I²t value (192) defines the thermal energy required to melt the fuse element. This parameter ensures consistent and predictable fuse operation under fault conditions. Exact matching of this value is critical for proper overcurrent protection coordination.

Q: Are there any environmental or storage considerations for these ceramic fuses?

A: Both parts are rated for operating temperatures from -55°C to 125°C. Moisture Sensitivity Level (MSL) is 1 (Unlimited), indicating no special moisture control requirements during storage or handling.