SPNH080.XXDE

Part Overview

The SPNH080.XXDE is a 1500VDC 80 AMP photovoltaic fuse manufactured by Littelfuse Inc. under the POWR-GARD® SPNH series. This rectangular bolt mount fuse is designed for solar photovoltaic applications with fast blow response characteristics and a breaking capacity of 30kA at rated voltage.

The SPNH080.XXDE is currently obsolete, which necessitates identification of equivalent substitute components for continued system design and maintenance. Equivalent alternatives must maintain the critical electrical and mechanical parameters that define functionality within photovoltaic systems.

Substiute Parts

SPNH080.XXDE

Littelfuse Inc.In Stock: 888SPNH080.XXDE Datasheet

Current PartRFQ

PSX1XLFL0080X

Littelfuse Inc.In Stock: 786PSX1XLFL0080X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SPNH080.XXDE is based on maintaining equivalence across the following critical electrical parameters: current rating (80A), DC voltage rating (1.5 kVDC), response time characteristic (Fast Blow), and mounting method (Bolt Mount). These parameters define the functional capability of the fuse within photovoltaic protection circuits.

The PSX1XLFL0080X serves as a direct electrical equivalent, maintaining identical current and voltage ratings with fast blow response. Differences in fuse geometry (square versus rectangular), breaking capacity (200kA versus 30kA), and application classification reflect design evolution within the Littelfuse product portfolio while preserving the core protection function.

Parameter Comparison

Engineering Selection Recommendations

The PSX1XLFL0080X is the manufacturer-recommended substitute for the obsolete SPNH080.XXDE. Both components maintain identical electrical ratings (80A, 1.5 kVDC) and fast blow response characteristics essential for photovoltaic system protection.

The PSX1XLFL0080X carries active product status and holds current UL, CE, and cURus certifications, ensuring compliance with contemporary regulatory requirements. The enhanced breaking capacity (200kA versus 30kA) represents an engineering improvement that does not affect substitution compatibility for the specified duty cycle.

Geometric differences between the rectangular SPNH080.XXDE and square PSX1XLFL0080X require verification of mounting bracket and chassis cutout dimensions. Both components feature bolt mount configurations with compatible electrical characteristics, but physical installation must be validated against the specific equipment design.

Frequently Asked Questions (FAQ)

Can the PSX1XLFL0080X replace the SPNH080.XXDE in all applications?

The PSX1XLFL0080X matches the critical electrical parameters (current rating, voltage rating, response time) of the SPNH080.XXDE. Physical mounting clearances and bracket compatibility must be verified against the equipment design, as fuse geometry differs between models.

Why is the breaking capacity different between the two parts?

Breaking capacity specifications reflect design evolution. The PSX1XLFL0080X breaking capacity of 200kA exceeds the original SPNH080.XXDE specification of 30kA. This enhanced capability does not create substitution incompatibility and represents an engineering improvement.

Are both parts certified to the same standards?

The SPNH080.XXDE holds CE, gPV, IEC, and UL approvals. The PSX1XLFL0080X holds CE, cURus, and UL approvals. Both meet UL and CE requirements. The gPV certification on the original part is specific to photovoltaic applications; the cURus certification on the substitute provides equivalent compliance pathways.

What are the thermal operating ranges?

The SPNH080.XXDE operating temperature is not specified in available documentation. The PSX1XLFL0080X operates across -55°C to 125°C, providing defined thermal boundaries for system design.

How do the melting I²t values affect substitution?

The melting I²t parameter (5000 for SPNH080.XXDE versus 2048 for PSX1XLFL0080X) indicates thermal energy capacity. The lower value on the substitute reflects optimized design; both values maintain the fast blow characteristic within the 80A current rating and are compatible with photovoltaic circuit protection requirements.