SPNH200.X2XLDLMS Equivalent & Substitute Parts

Part Overview

The SPNH200.X2XLDLMS is a 200A 1.5 kVDC rectangular bolt mount fuse manufactured by Littelfuse Inc. under the POWR-GARD® SPNH series. This component is designed for photovoltaic (PV) applications requiring fast-blow protection at high DC voltages. The part is currently classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for continued system support and new installations.

Substiute Parts

SPNH200.X2XLDLMS

Littelfuse Inc.In Stock: 687SPNH200.X2XLDLMS Datasheet

Current PartRFQ

PSX1XLUB0200X

Littelfuse Inc.In Stock: 1036PSX1XLUB0200X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPNH200.X2XLDLMS is based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Current Rating: 200A (exact match required)
• Voltage Rating: 1.5 kVDC (exact match required)
• Response Time: Fast Blow (exact match required)
• DC Cold Resistance: Must support equivalent circuit performance

Mechanical Compatibility Criteria:

• Mounting Type: Bolt Mount (exact match required)
• Package/Case: Rectangular or Square blade configuration compatible with bolt mount terminals

Regulatory & Environmental Criteria:

• RoHS3 Compliance (mandatory for modern applications)
• Moisture Sensitivity Level 1 (unlimited shelf life)
• Approval certifications: UL and CE (minimum required)

The PSX1XLUB0200X meets all electrical parameters (200A, 1.5 kVDC, Fast Blow) and mechanical mounting requirements (bolt mount). Both components are RoHS3 compliant with MSL 1 rating. The substitute part is currently active in production, addressing the obsolescence of the original SPNH200.X2XLDLMS.

Parameter Comparison

Engineering Selection Recommendations

The PSX1XLUB0200X is the manufacturer-recommended substitute for the obsolete SPNH200.X2XLDLMS. Selection is based on the following engineering factors:

Electrical Performance: Both components maintain identical current (200A) and voltage (1.5 kVDC) ratings with fast-blow response characteristics. The PSX1XLUB0200X provides a higher breaking capacity (200 kA versus 30 kA), which represents an improvement in fault protection capability. The lower melting I²t value (18016 versus 22000) indicates faster thermal response, which is acceptable for protective device applications.

Mechanical Compatibility: Both fuses employ bolt mount terminals compatible with standard PV and semiconductor circuit configurations. The form factor difference (rectangular versus square) requires verification of mounting bracket and terminal clearance in the specific application enclosure.

Regulatory Compliance: Both components hold UL and CE certifications. The PSX1XLUB0200X carries cURus approval, providing additional North American regulatory coverage. Both are ROHS3 compliant with MSL 1 rating, ensuring environmental compliance and unlimited shelf life storage.

Product Status: The PSX1XLUB0200X is active in production with documented inventory availability (926 pieces), ensuring long-term supply continuity compared to the obsolete SPNH200.X2XLDLMS.

Frequently Asked Questions (FAQ)

Q: Can the PSX1XLUB0200X directly replace the SPNH200.X2XLDLMS in existing installations?

A: Electrical substitution is valid based on identical current, voltage, and response time ratings. Mechanical compatibility requires confirmation that the square form factor of the PSX1XLUB0200X fits the existing bolt mount bracket and terminal spacing designed for the rectangular SPNH200.X2XLDLMS.

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

A: The PSX1XLUB0200X melting I²t of 18016 is lower than the SPNH200.X2XLDLMS value of 22000. This indicates faster thermal response to overcurrent conditions. For protective applications, this represents equivalent or improved performance, as the fuse will interrupt fault currents more rapidly.

Q: Why does the PSX1XLUB0200X have a higher breaking capacity?

A: The 200 kA breaking capacity of the PSX1XLUB0200X exceeds the 30 kA rating of the SPNH200.X2XLDLMS. This enhancement provides superior fault interruption capability and represents a design improvement. Higher breaking capacity does not compromise protection performance at rated current levels.

Q: Are both components suitable for photovoltaic applications?

A: The SPNH200.X2XLDLMS carries gPV certification specifically for solar applications. The PSX1XLUB0200X is rated for semiconductor applications. Both hold UL and CE certifications. Application suitability depends on system-specific requirements and local regulatory standards for the intended installation.

Q: What are the physical dimension differences?

A: SPNH200.X2XLDLMS: 5.165" L × 2.362" W × 2.362" H (131.20mm × 60.00mm × 60.00mm). PSX1XLUB0200X: 4.988" L × 2.028" W × 2.264" H (126.70mm × 51.50mm × 57.50mm). The substitute is slightly smaller in all dimensions, which may affect mounting bracket compatibility.

Q: Are there temperature operating range differences?

A: The SPNH200.X2XLDLMS does not specify an operating temperature range. The PSX1XLUB0200X specifies -55°C to 125°C operation. This documented range for the substitute provides design guidance for thermal management in the application environment.