PSK-S3-15 AC/DC Converter 15V 3W Equivalent & Substitute Parts

Part Overview

The PSK-S3-15 is an enclosed AC/DC converter module manufactured by CUI Inc., rated for 15V output at 200mA with 3W power capacity. This unit accepts universal input voltage ranging from 85–264 VAC or 100–370 VDC and is designed for ITE (Commercial) applications. The PSK-S3-15 is classified as obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and new design implementations where this topology remains suitable.

Substiute Parts

PSK-S3-15

CUI Inc.In Stock: 975PSK-S3-15 Datasheet

Current PartRFQ

PSK-3D-15

CUI Inc.In Stock: 935PSK-3D-15 Datasheet

MFR RecommendedRFQ

RAC03-15SK

Recom PowerIn Stock: 1186RAC03-15SK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSK-S3-15 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Output voltage must equal 15V
• Output current capacity must be at least 200mA
• Power rating must be 3W
• Input voltage range must accommodate the application's supply specifications
• Line and load regulation must meet or exceed ±0.5% and ±1% respectively

Mechanical Compatibility Requirements:

• Mounting type must be Through Hole
• Package footprint and lead configuration must be compatible with existing PCB layouts
• Physical dimensions must fit within the allocated space

Regulatory and Quality Requirements:

• Product status should be Active (preferred) or equivalent certification standing
• Compliance with applicable standards (IEC, UL, CE, cURus)
• RoHS and REACH compliance status

The substitute parts PSK-3D-15 and RAC03-15SK meet these criteria with variations in input voltage range, operating temperature, efficiency, and package configuration that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

PSK-3D-15 (CUI Inc.) – Recommended Primary Substitute

The PSK-3D-15 is the manufacturer-recommended equivalent and shares the same CUI Inc. design lineage. This part maintains identical electrical output specifications (15V, 200mA, 3W) and regulation characteristics (±0.5% line, ±1% load). The PSK-3D-15 offers an extended input voltage range (85–305 VAC, 100–430 VDC) and improved operating temperature range (−40°C to 85°C), providing greater application flexibility. Efficiency is improved to 79%. The primary consideration is the package change from 26-DIP (5 leads) to 5-DIP (4 leads), requiring PCB layout verification. The PSK-3D-15 holds Active product status and carries ROHS3 compliance with CE and cURus certifications.

RAC03-15SK (Recom Power) – Alternative Substitute

The RAC03-15SK provides electrical equivalence with identical output specifications and universal input feature. This part maintains the original input voltage range (85–264 VAC, 120–370 VDC) and operates across −40°C to 80°C. The RAC03-15SK is Active status with ROHS3 compliance and CE/cURus certifications. Regulation tolerances are wider (±2.5% line and load) compared to the original specification, and efficiency is lower at 75%. The package configuration is 4-DIP Module, differing from the original 26-DIP footprint. This substitute is suitable for applications where tighter regulation is not critical and where the package change is accommodated.

Substitution Constraints:

Both substitute parts require verification of PCB footprint compatibility due to package changes. Applications requiring the original ±0.5% line regulation specification should prioritize PSK-3D-15. Applications with space constraints or existing 4-DIP layouts may utilize RAC03-15SK with acceptance of wider regulation tolerances.

Frequently Asked Questions (FAQ)

Q: Can the PSK-3D-15 directly replace the PSK-S3-15 on existing PCBs?

A: Electrical substitution is valid; however, the package change from 26-DIP (5 leads) to 5-DIP (4 leads) requires PCB layout verification. Lead configuration and spacing differ, necessitating footprint assessment before implementation.

Q: What is the primary difference between PSK-3D-15 and RAC03-15SK?

A: Both provide 15V, 200mA, 3W output. The PSK-3D-15 maintains ±0.5% line regulation and ±1% load regulation matching the original specification, while RAC03-15SK has ±2.5% regulation tolerances. The PSK-3D-15 offers extended input voltage range (up to 305 VAC, 430 VDC) and higher efficiency (79% vs. 75%).

Q: Is the PSK-S3-15 still available for purchase?

A: The PSK-S3-15 is classified as Obsolete. Substitute parts PSK-3D-15 and RAC03-15SK are both Active status with current inventory availability.

Q: Which substitute part has the best thermal performance?

A: The PSK-3D-15 supports the highest operating temperature range (−40°C to 85°C) compared to RAC03-15SK (−40°C to 80°C) and the original PSK-S3-15 (−40°C to 70°C).

Q: Are both substitute parts RoHS compliant?

A: Yes, both PSK-3D-15 and RAC03-15SK are ROHS3 Compliant. The original PSK-S3-15 RoHS status is not specified in the documentation.

Q: What certifications do the substitute parts carry?

A: PSK-3D-15 carries CE and cURus certifications. RAC03-15SK carries CE and cURus certifications. Both meet applicable safety and electromagnetic compatibility standards.

Q: Can I use RAC03-15SK if my application requires ±0.5% line regulation?

A: No. The RAC03-15SK specification is ±2.5% line regulation, which does not meet the original ±0.5% requirement. The PSK-3D-15 maintains the original regulation specification.

Q: What is the lead count difference between these parts?

A: PSK-S3-15 is 26-DIP with 5 leads, PSK-3D-15 is 5-DIP with 4 leads, and RAC03-15SK is 4-DIP. Lead count and spacing must be verified against PCB design before substitution.