Equivalent & Substitute Parts Reference for IRM-20-3.3

Part Overview

IRM-20-3.3 from MEAN WELL USA Inc. is an enclosed AC/DC converter providing a single 3.3V output at up to 4.5A, suitable for ITE (commercial) applications. It is an actively available product with regulatory approvals and RoHS3 compliance. Identifying equivalent and substitute models is critical for ensuring uninterrupted production, design flexibility, and inventory management—especially in cases of supply chain changes or qualification requirements.

Substiute Parts

IRM-20-3.3

MEAN WELL USA Inc.In Stock: 1123IRM-20-3.3 Datasheet

Current PartRFQ

ECE20US03

XP PowerIn Stock: 1154ECE20US03 Datasheet

SimilarRFQ

LD20-23B03R2

Mornsun America, LLCIn Stock: 1200LD20-23B03R2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts have been selected strictly by matching the following electrical and mechanical parameters: number of outputs, output voltage, maximum output current, input voltage range, mounting type, package type, regulatory approval agencies, RoHS compliance, and physical dimensions. Only products with equivalent or permitted superior specification for these fields are included.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed—ECE20US03 (XP Power) and LD20-23B03R2 (Mornsun America, LLC)—are active, provide equivalent output voltage and current ratings, support through-hole mounting, and comply with RoHS3. Regulatory approvals are present for all models, though specific agencies differ. Dimensions and package compatibility align closely, with minor variations clearly documented above. Each candidate maintains the required moisture sensitivity rating. Selection may be made based on inventory availability and required approval agency alignment only.

Frequently Asked Questions (FAQ)

Q1: What are the minimum key parameters when selecting an AC/DC converter substitute for IRM-20-3.3?
A1: Number of outputs, output voltage, output current, input voltage range, mechanical package, regulatory approvals, RoHS status, and moisture sensitivity level.

Q2: Can the substitute models be mounted in the same way as IRM-20-3.3?
A2: All listed substitutes utilize through-hole mounting, matching the main model’s installation method.

Q3: Are the substitute parts suitable for the same application categories?
A3: All substitutes are suitable for ITE (commercial) applications; LD20-23B03R2 also lists household appliances and medical.

Q4: Is there any difference in package footprint or pin layout?
A4: The main part and ECE20US03 both use 4-DIP Module packages of nearly identical dimensions. LD20-23B03R2 uses a 6-DIP Module with 4 leads, having the same overall dimensions. Confirm mechanical fit based on these details.

Q5: Do all listed substitutes meet RoHS3 and moisture sensitivity requirements?
A5: Yes, all listed parts are ROHS3 Compliant and hold an unlimited moisture sensitivity level (MSL 1).

Q6: How does approval agency compliance differ between the main and substitute models?
A6: Approval agencies vary. The main part is approved by CB, CE, cURus, TUV. ECE20US03 is approved by CSA, cUL, EN, UL. LD20-23B03R2 is approved by CB, CE, cURus. Select according to the required regional or application certification.