0LD35523Z Power Distribution Block - Equivalent & Substitute Parts

Part Overview

The 0LD35523Z is a 3-pole power distribution block manufactured by Littelfuse Inc., rated for 335 A at 600 V. This component is classified as obsolete, making identification of suitable substitute parts essential for system maintenance and component replacement. The POWR-BLOKS® LD series design provides screw-type connections on both line and load sides, supporting wire sizes from 400 MCM on the line side to #14 AWG on the load side. Due to its discontinued status, the LFD35523Z from the active POWR-BLOKS® LF series serves as the manufacturer-recommended equivalent.

Substiute Parts

0LD35523Z

Littelfuse Inc.In Stock: 9740LD35523Z Datasheet

Current PartRFQ

LFD35523Z

Littelfuse Inc.In Stock: 942LFD35523Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LFD35523Z qualifies as a direct substitute for the 0LD35523Z based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Identical pole configuration (3 poles)
• Identical voltage rating (600 V)
• Identical connection architecture (1 line-side connection per pole, 4 load-side connections per pole)
• Identical connection type (screw-based on both sides)
• Identical RoHS3 compliance status
• Same manufacturer (Littelfuse Inc.)
• Same product category (Terminal Blocks)

Differing Parameters:

• Current rating: 0LD35523Z rated 335 A; LFD35523Z rated 380 A
• Line side wire size: 0LD35523Z supports 400 MCM; LFD35523Z supports 500 MCM
• Load side wire size: 0LD35523Z supports #14 AWG minimum; LFD35523Z supports #14 AWG minimum
• Series designation: POWR-BLOKS® LD (obsolete) vs. POWR-BLOKS® LF (active)
• Product status: Obsolete vs. Active

The LFD35523Z maintains functional equivalence through identical electrical ratings and connection topology while offering enhanced current capacity and wire gauge compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LFD35523Z is the manufacturer-designated substitute for the obsolete 0LD35523Z. Both components maintain identical voltage and pole configurations with screw-type termination on all sides. The LFD35523Z is currently in active production status with full ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

The LFD35523Z provides a higher current rating (380 A versus 335 A) and supports larger line-side wire gauges (500 MCM versus 400 MCM), making it suitable for applications requiring the original 0LD35523Z specifications. The enhanced capacity of the substitute part does not create incompatibility with existing installations designed for the original component.

Frequently Asked Questions (FAQ)

Q: Can the LFD35523Z directly replace the 0LD35523Z in existing installations?

A: Yes. Both components share identical pole count, voltage rating, connection topology, and wire gauge ranges on the load side. The LFD35523Z's higher current rating and larger line-side wire capacity do not prevent direct substitution in applications originally specified for the 0LD35523Z.

Q: What is the primary reason for substitution?

A: The 0LD35523Z is classified as obsolete. The LFD35523Z, from the active POWR-BLOKS® LF series, is the manufacturer-recommended equivalent and remains in current production.

Q: Are there compliance differences between the two parts?

A: Both components are ROHS3 compliant. The LFD35523Z carries additional REACH Unaffected certification. No compliance barriers exist for substitution.

Q: How do the current ratings affect substitution?

A: The LFD35523Z is rated for 380 A compared to the 0LD35523Z at 335 A. This higher rating does not create incompatibility; it indicates enhanced capacity suitable for the original application parameters.

Q: Are the physical dimensions and mounting compatible?

A: Both components are 3-pole power distribution blocks with identical connection architecture (1 line-side, 4 load-side connections per pole). Screw-type termination is used on both sides for both parts.