5VTP 6.3-R Equivalent & Substitute Parts

Part Overview

The 5VTP 6.3-R is a 6.3 A, 250 V AC/DC fuse cartridge manufactured by Bel Fuse Inc. in a 5mm x 20mm glass through-hole package with slow-blow response characteristics. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical form factors, and approval certifications to ensure direct compatibility in existing circuit designs.

Substiute Parts

5VTP 6.3-R

Bel Fuse Inc.In Stock: 10905VTP 6.3-R Datasheet

Current PartRFQ

021306.3MXEP

Littelfuse Inc.In Stock: 1718021306.3MXEP Datasheet

DirectRFQ

021806.3MXEP

Littelfuse Inc.In Stock: 2436021806.3MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5VTP 6.3-R are qualified based on the following mandatory electrical and mechanical parameters:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
• RoHS Status: ROHS3 Compliant (exact match required)

The following parts meet all substitution criteria:

• 021306.3MXEP (Littelfuse Inc., Series 213, Active status)
• 021806.3MXEP (Littelfuse Inc., Series 218, Active status)

Parameter Comparison

Engineering Selection Recommendations

Both 021306.3MXEP and 021806.3MXEP are active-status alternatives to the obsolete 5VTP 6.3-R. Selection between these two Littelfuse options should be based on the following factors:

021306.3MXEP (Series 213) provides a melting I²t value of 600, which is closer to the original 5VTP specification of 658. This part carries approval certifications including BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE.

021806.3MXEP (Series 218) provides a lower melting I²t value of 198.5 and a lower DC cold resistance of 0.0076 Ohms. This part carries approval certifications including CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE.

Both parts are available in active production with substantial inventory levels. Physical dimensions differ slightly between the original part and both substitutes, with substitute parts measuring 5.80mm diameter versus 5.50mm for the original, and 22.50mm length versus 21.00mm for the original. These dimensional variations remain within the 5mm x 20mm package classification and are compatible with standard through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can 021306.3MXEP and 021806.3MXEP be used interchangeably with the 5VTP 6.3-R?

A: Both parts meet all mandatory electrical and mechanical substitution criteria: 6.3 A current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm cartridge glass package, through-hole mounting, and ROHS3 compliance. Direct substitution is electrically and mechanically compatible.

Q: What is the significance of the different melting I²t values?

A: The melting I²t parameter characterizes the thermal energy required to melt the fuse element. The 5VTP 6.3-R specifies 658, while 021306.3MXEP provides 600 and 021806.3MXEP provides 198.5. These variations affect the precise time-current response curve. Applications with specific I²t requirements should verify compatibility with the selected substitute.

Q: Are there dimensional compatibility concerns with the substitute parts?

A: The substitute parts measure 5.80mm diameter and 22.50mm length, compared to the original 5.50mm diameter and 21.00mm length. Both remain within the 5mm x 20mm package classification. Standard through-hole fuse holders accommodate these minor dimensional variations without modification.

Q: Which approval certifications are most relevant for my application?

A: Both substitute parts carry CCC, CE, CSA, SEMKO, and VDE certifications, matching the original part's core compliance profile. 021306.3MXEP adds BSI, PSE, and UR certifications. 021806.3MXEP adds K-MARK, PSE, and UL certifications. Select based on your specific regional or industry compliance requirements.

Q: What is the inventory status of these substitute parts?

A: 021306.3MXEP is available with 1703 pieces in stock. 021806.3MXEP is available with 2400 pieces in stock. Both are active production items from Littelfuse Inc., ensuring long-term availability compared to the obsolete 5VTP 6.3-R.