Littelfuse 0LD55863Z Power Distribution Block - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0LD55863Z is a 3-pole power distribution block rated for 760 A at 600 V, designed for industrial power distribution applications. This component features dual line-side connections and eight load-side connections per pole, accommodating wire sizes from 500 MCM to #14 AWG. The part is classified as obsolete, necessitating identification of active equivalent models to maintain supply chain continuity and ensure long-term availability for new installations and field replacements.

Substiute Parts

0LD55863Z

Littelfuse Inc.In Stock: 7530LD55863Z Datasheet

Current PartRFQ

LFD55863Z

Littelfuse Inc.In Stock: 773LFD55863Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0LD55863Z is determined by strict equivalence across the following electrical and mechanical parameters:

• Electrical Performance: Voltage rating (600 V) and current capacity (760 A) must be identical
• Pole Configuration: 3-pole architecture is mandatory
• Connection Architecture: Line-side dual connections and load-side eight connections per pole must match exactly
• Wire Gauge Compatibility: Line-side acceptance of 500 MCM to #4 AWG and load-side acceptance of 2/0 to #14 AWG must be maintained
• Connection Method: Screw-type connections on both line and load sides are required
• Compliance: RoHS3 compliance and MSL 1 rating must be preserved

The LFD55863Z meets all substitution criteria as an active equivalent within the Littelfuse POWR-BLOKS® product family.

Parameter Comparison

Engineering Selection Recommendations

The LFD55863Z is the direct active equivalent for the obsolete 0LD55863Z. Both components maintain identical electrical ratings, pole configuration, connection architecture, and wire gauge compatibility. The LFD55863Z carries active product status, ensuring ongoing availability and supply chain support. Both parts meet ROHS3 compliance requirements and carry MSL 1 moisture sensitivity ratings, confirming suitability for standard industrial environments without special handling protocols. The transition from the LD series to the LF series represents a product line evolution within Littelfuse's POWR-BLOKS® family while preserving all functional and electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can the LFD55863Z be used as a direct replacement for the 0LD55863Z in existing installations?

A: Yes. The LFD55863Z is electrically and mechanically equivalent to the 0LD55863Z across all specified parameters, including voltage rating, current capacity, pole count, connection architecture, and wire gauge acceptance ranges.

Q: What is the primary reason for substitution?

A: The 0LD55863Z is classified as obsolete. The LFD55863Z provides continuity of supply as an active product with identical electrical and mechanical specifications.

Q: Are there any compliance differences between the two parts?

A: No. Both the 0LD55863Z and LFD55863Z are ROHS3 compliant with MSL 1 moisture sensitivity ratings. No additional handling or environmental considerations are introduced by the substitution.

Q: Does the series designation change affect compatibility?

A: No. The transition from POWR-BLOKS® LD to POWR-BLOKS® LF represents a product line designation update within Littelfuse's portfolio. All functional, electrical, and mechanical specifications remain identical.

Q: What wire sizes are compatible with each connection type?

A: Line-side connections accept 500 MCM to #4 AWG copper or aluminum conductors. Load-side connections accept 2/0 to #14 AWG copper or aluminum conductors. Both the 0LD55863Z and LFD55863Z maintain these specifications.

Q: Is packaging different between the two parts?

A: The LFD55863Z is supplied in box packaging. Packaging differences do not affect electrical or mechanical performance and do not impact substitution validity.