LDD-300HS Equivalent & Substitute Parts Reference

Part Overview

The LDD-300HS from MEAN WELL USA Inc. is a 300mA constant current LED driver utilizing buck topology with a single output and a wide 2V–52V output range. As an obsolete product in the LDD-H series with surface mount implementation, identifying equivalent and substitute components is necessary for design continuity, manufacturing support, and ongoing maintenance.

Substiute Parts

LDD-300HS

MEAN WELL USA Inc.In Stock: 804LDD-300HS Datasheet

Current PartRFQ

NLDD-350H

MEAN WELL USA Inc.In Stock: 1501NLDD-350H Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute options are identified based strictly on the following key parameters: constant current output, buck topology, single output, input and output voltage ranges, maximum output current, dimming method, protection features, mounting type, package, approval/certification, operating temperature, and environmental compliance. Only substitutes meeting all provided electrical and mechanical criteria are listed, in accordance with the input.

Parameter Comparison

Engineering Selection Recommendations

LDD-300HS is obsolete, requiring selection of alternative parts for ongoing applications. NLDD-350H is active, ROHS3 compliant, and has equivalent regulatory classifications and approvals, fulfilling environmental and export compliance as per provided data. Selection between these parts must be constrained by the package type, mounting method, and mechanical dimensions, as well as by the current, voltage, and thermal documented parameters.

Frequently Asked Questions (FAQ)

Q1: What key parameters must be considered when selecting an equivalent or substitute for the LDD-300HS?
A1: Substitution requires matching type, topology, number of outputs, input/output voltage range, current rating, dimming method, features, operating temperature, approval/certification, compliance (RoHS/REACH), mounting type, and package dimensions.

Q2: Are there differences in mounting between LDD-300HS and NLDD-350H?
A2: Yes. LDD-300HS uses a surface mount (24-SMD, 18 leads) form factor, while NLDD-350H uses a through-hole (24-DIP, 9 leads) package.

Q3: Does NLDD-350H have a higher output current compared to LDD-300HS?
A3: Yes. NLDD-350H provides up to 350mA, while LDD-300HS provides up to 300mA.

Q4: Are the environmental and export compliance statuses equivalent?
A4: Both parts are ROHS3 compliant, REACH unaffected, have MSL 1 (unlimited), and share the same ECCN and HTSUS codes.

Q5: Is there a change in the input and output voltage range when substituting NLDD-350H?
A5: NLDD-350H has a 10V minimum input (vs. 9V on LDD-300HS), and its output voltage range is 6–52V (vs. 2–52V on LDD-300HS).

Q6: How do package size and dimensions compare?
A6: NLDD-350H is slightly larger in all three dimensions than LDD-300HS.

Q7: Are the approval agencies the same for both parts?
A7: LDD-300HS is CE approved; NLDD-350H is CE and EAC approved.