SPXI005.TXB Equivalent & Substitute Parts

Part Overview

The SPXI005.TXB is a 5A 1.5 kVDC cartridge fuse designed for solar photovoltaic applications. This free-hanging inline fuse is part of the POWR-GARD® SPXI series and features fast-blow response characteristics with a breaking capacity of 30 kA at rated voltage. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain system functionality and ensure continued availability for replacement and new installations.

Substiute Parts

SPXI005.TXB

Littelfuse Inc.In Stock: 1107SPXI005.TXB Datasheet

Current PartRFQ

SPXI005.L

Littelfuse Inc.In Stock: 1094SPXI005.L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPXI005.TXB is determined by electrical and mechanical parameter equivalence within the POWR-GARD® SPXI series. The substitute part SPXI005.L maintains identical electrical specifications: 5A current rating, 1.5 kVDC voltage rating, fast-blow response, 30 kA breaking capacity, 48 melting I²t, and 0.076 Ohms DC cold resistance. Both parts are cartridge-type fuses with free-hanging inline mounting configuration and identical package classification (Cartridge, Inline, Double Ended). Both parts carry the same approval agencies (CE, gPV, UL, UR) and meet RoHS compliance requirements. The primary distinction is product status: SPXI005.TXB is obsolete while SPXI005.L is active, and minor dimensional variation exists (4.490" L versus 4.333" L), which does not affect electrical performance or functional compatibility in standard inline fuse holder applications.

Parameter Comparison

Engineering Selection Recommendations

The SPXI005.L is the direct substitute for the obsolete SPXI005.TXB. Both parts are manufactured by Littelfuse Inc. within the same POWR-GARD® SPXI series and maintain identical electrical and functional specifications. The SPXI005.L carries active product status, ensuring ongoing availability and supply chain continuity. Both parts satisfy the same approval requirements (CE, gPV, UL, UR) and meet RoHS compliance standards, with SPXI005.L meeting the more recent ROHS3 specification. The dimensional difference (0.157" length reduction) does not impact electrical performance or compatibility with standard inline fuse holder configurations. For new designs and replacement applications, SPXI005.L is the appropriate selection due to its active status and enhanced compliance posture.

Frequently Asked Questions (FAQ)

Q: Can SPXI005.L be used as a direct replacement for SPXI005.TXB in existing solar photovoltaic systems?

A: Yes. Both parts are electrically and functionally equivalent with identical current rating (5A), voltage rating (1.5 kVDC), response time (fast blow), breaking capacity (30 kA), and resistance characteristics (0.076 Ohms). Both are cartridge-type fuses with free-hanging inline mounting and identical approval certifications.

Q: What is the significance of the length difference between SPXI005.TXB (4.490" L) and SPXI005.L (4.333" L)?

A: The 0.157" length difference does not affect electrical performance or compatibility with standard inline fuse holder applications. Both parts maintain the same 0.406" diameter and cartridge configuration, ensuring mechanical fit within typical fuse holder designs.

Q: Why is SPXI005.TXB classified as obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. SPXI005.L, as the active equivalent within the same series, provides continued access to the same electrical and functional specifications.

Q: Are there any compliance differences between SPXI005.TXB and SPXI005.L?

A: Both parts carry identical approval agencies (CE, gPV, UL, UR). SPXI005.L meets ROHS3 compliance, while SPXI005.TXB meets RoHS compliance. Both are suitable for solar photovoltaic applications.

Q: What packaging options are available for these parts?

A: SPXI005.TXB is supplied in standard packaging, while SPXI005.L is available in bulk packaging. Both maintain identical electrical specifications and cartridge configuration.