Recom Power RSS-123.3 Equivalent & Substitute Parts Reference

Part Overview

The Recom Power RSS-123.3 is an isolated DC-DC converter module designed for commercial ITE applications, providing a regulated 3.3V output (303mA max) from a 10.8V–13.2V input with 1W power and 1kV isolation. Its efficiency rating is 75%, and it features SCP (short circuit protection). The module is supplied in an 8-SMD (5 leads) package suitable for surface mount applications. This part is classified as obsolete, necessitating the identification of alternative models for ongoing design requirements, production support, and field servicing.

Substiute Parts

RSS-123.3

Recom PowerIn Stock: 1124RSS-123.3 Datasheet

Current PartRFQ

R1S-123.3

Recom PowerIn Stock: 1176R1S-123.3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute selection is strictly based on matching key electrical and mechanical parameters: input voltage range, output voltage, output current rating, isolation voltage, power rating, efficiency, module type, mounting style, package type, and regulatory compliance. Only modules that fully align with these parameters are considered direct alternatives.

Parameter Comparison

Engineering Selection Recommendations

The RSS-123.3 is obsolete. The R1S-123.3 matches all regulatory and technical compliance parameters, including ROHS3 status, MSL 1 rating, REACH status, and ECCN code. Selection can be made solely on the basis of product status and identical compliance certifications provided in the part descriptions.

Frequently Asked Questions (FAQ)

Q1: What are the critical substitution parameters for the RSS-123.3?
The essential criteria are: input and output voltage ratings, output current, isolation voltage, power rating, module type, efficiency, mounting style, package type, and compliance classifications.

Q2: Does the R1S-123.3 require changes in circuit layout?
Both parts use the same surface mount 8-SMD module with 5 leads, so package compatibility is maintained.

Q3: Are there any compliance differences between RSS-123.3 and R1S-123.3?
Both models are ROHS3 compliant, REACH unaffected, MSL 1 (Unlimited), and classified under ECCN EAR99.

Q4: Is there a change in output capabilities between the two parts?
Both DC-DC modules provide a single 3.3V output up to 303mA at 1W with 1kV isolation and 75% efficiency.

Q5: How is substitute compatibility determined?
Substitute compatibility is based only on explicit key parameters: voltage ranges, current, isolation, efficiency, package type, and compliance.

Q6: Will the substitute part fit the same PCB footprint as the RSS-123.3?
Both are 8-SMD modules with 5 leads used for surface mount applications. Dimensional checks based on the listed sizes ensure compatible PCB footprints.