SPXV025.T Equivalent & Substitute Parts

Part Overview

The SPXV025.T is a 25A 1.5 kVDC cartridge fuse from Littelfuse Inc.'s POWR-GARD® SPXV series, designed for solar photovoltaic applications. This part is currently obsolete, making identification of suitable substitute components essential for system maintenance and new installations. The cartridge fuse requires a compatible holder for installation and is rated for breaking capacity of 15 kA at the rated voltage.

Substiute Parts

SPXV025.T

Littelfuse Inc.In Stock: 1198SPXV025.T Datasheet

Current PartRFQ

SPXV025.TXM

Littelfuse Inc.In Stock: 796SPXV025.TXM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPXV025.T is determined by strict equivalence in the following electrical and mechanical parameters:

• Current Rating: 25A (exact match required)
• Voltage Rating (DC): 1.5 kVDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Package / Case: Cartridge, Non-Standard (exact match required)

The SPXV025.TXM meets all substitution criteria. While this substitute part exhibits differences in response time classification, breaking capacity, physical dimensions, melting I²t, and approval agencies, these variations remain within the allowable parameters for the cartridge fuse category and do not prevent functional equivalence in the specified application.

Parameter Comparison

Engineering Selection Recommendations

The SPXV025.TXM is the manufacturer-recommended substitute for the obsolete SPXV025.T. Both components are manufactured by Littelfuse Inc. within the same POWR-GARD® SPXV series and maintain electrical equivalence at 25A and 1.5 kVDC ratings.

The SPXV025.TXM offers the advantage of active product status, ensuring continued availability and supply chain reliability. This substitute carries expanded approval certifications including gPV and UL in addition to CE compliance, providing broader regulatory acceptance for solar photovoltaic installations.

The dimensional difference between the two parts (0.540" Dia vs. 0.406" L) requires verification of holder compatibility prior to installation. The increased breaking capacity (50 kA vs. 15 kA) and enhanced certifications of the substitute part represent improvements over the original specification.

Frequently Asked Questions (FAQ)

Q: Can the SPXV025.TXM be used as a direct replacement for the SPXV025.T?

A: The SPXV025.TXM is electrically equivalent at 25A and 1.5 kVDC ratings. Mechanical compatibility depends on holder design. Verify that the holder accommodates the substitute part's dimensions (0.406" L x 3.333" W) before installation.

Q: What is the significance of the "Fast Blow" response time on the substitute part?

A: The SPXV025.TXM is classified as Fast Blow, indicating rapid response to overcurrent conditions. The original SPXV025.T does not specify response time classification. This characteristic is appropriate for solar photovoltaic circuit protection applications.

Q: Why does the substitute part have a higher breaking capacity?

A: The SPXV025.TXM is rated for 50 kA breaking capacity compared to the original 15 kA. This enhanced rating provides greater protection margin and is consistent with modern solar fuse design standards.

Q: Are there compliance differences between the two parts?

A: The SPXV025.TXM carries CE, gPV, and UL certifications, while the original SPXV025.T carries CE and UR certifications. The gPV certification is specific to grid-connected photovoltaic systems, and UL certification provides North American regulatory acceptance.

Q: What should be verified before substituting this part?

A: Confirm holder mechanical compatibility with the substitute part's dimensions. Verify that system voltage and current ratings remain at 1.5 kVDC and 25A respectively. Ensure that the holder design accommodates the cartridge, non-standard package format.