Equivalent & Substitute Parts for 0LD35551Z

Part Overview

The 0LD35551Z is a 1-pole power distribution block manufactured by Littelfuse, rated for 350 A at 600 V. This component is part of the POWR-BLOKS® LD series and is designed for industrial power distribution applications requiring high current capacity and multiple load-side connection points. The part is currently listed as obsolete, making identification of suitable substitute components essential for system maintenance and replacement scenarios.

Substiute Parts

0LD35551Z

LittelfuseIn Stock: 9970LD35551Z Datasheet

Current PartRFQ

0LD45551ZX

Littelfuse Inc.In Stock: 9000LD45551ZX Datasheet

MFR RecommendedRFQ

16325-1

Eaton - Bussmann Electrical DivisionIn Stock: 79216325-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0LD35551Z is determined by the following critical parameters:

• Electrical Ratings: Voltage rating of 600 V and current rating of 350 A must be maintained or exceeded
• Pole Configuration: Single-pole design is required
• Connection Architecture: Both line side and load side must utilize screw connection types
• Connection Count: Line side requires 2 connections per pole; load side requires 6 connections per pole
• Wire/Stud Compatibility: Line side must accommodate 2/0 - #14 CU/AL; load side must accommodate 4 - #14 CU/AL
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status are mandatory

Two substitute parts meet these criteria and are identified as direct equivalents.

Parameter Comparison

Engineering Selection Recommendations

0LD45551ZX (Littelfuse Inc.) is the manufacturer-recommended substitute. As an active product from the original manufacturer, this part maintains design continuity and is ROHS3 compliant and REACH unaffected. Selection of this part ensures compatibility with existing Littelfuse POWR-BLOKS® LD series infrastructure.

16325-1 (Eaton - Bussmann Electrical Division) is an active alternative from Eaton's Magnum® 163 series. This part meets all specified electrical ratings (600 V, 350 A), maintains the required single-pole configuration with 2 line-side and 6 load-side screw connections, and supports the required wire/stud sizes. The part is ROHS3 compliant and REACH unaffected. The Eaton part provides cross-manufacturer compatibility for applications where supply chain diversification is beneficial.

Both substitute parts are active products, eliminating the obsolescence risk associated with the original 0LD35551Z.

Frequently Asked Questions (FAQ)

Q: Can the 0LD45551ZX be used as a direct replacement for the 0LD35551Z?

A: Yes. The 0LD45551ZX is the manufacturer-recommended substitute from Littelfuse and maintains electrical ratings, connection architecture, and regulatory compliance required for the 0LD35551Z application.

Q: Is the 16325-1 from Eaton electrically equivalent to the 0LD35551Z?

A: Yes. The 16325-1 meets the critical electrical parameters: 600 V voltage rating, 350 A current rating, single-pole configuration, 2 line-side connections, 6 load-side connections, and screw connection types. Wire/stud size compatibility is maintained for both copper and aluminum conductors.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution requires matching: 600 V voltage rating, 350 A current rating, 1-pole configuration, 2 line-side screw connections, 6 load-side screw connections, and wire/stud size accommodation of 2/0 - #14 CU/AL (line side) and 4 - #14 CU/AL (load side). ROHS3 compliance and REACH unaffected status are mandatory.

Q: Why is the original 0LD35551Z listed as obsolete?

A: The 0LD35551Z is obsolete and no longer manufactured by Littelfuse. The 0LD45551ZX serves as the active replacement within the POWR-BLOKS® LD series.

Q: Are there packaging differences between the substitute parts?

A: The 0LD45551ZX packaging is not specified in available data. The 16325-1 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Do both substitute parts support the same wire gauge range?

A: Yes. Both the 0LD45551ZX and 16325-1 support the required wire/stud sizes. The 16325-1 additionally specifies aluminum conductor accommodation at #8 gauge for both line and load sides, providing extended compatibility for aluminum conductor applications.