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PSK-S20C-24 Equivalent & Substitute Parts Reference
Part Overview
The CUI Inc. PSK-S20C-24 is an enclosed AC/DC converter rated for one output of 24V at 833mA (20W), with a universal input voltage range of 85–264 VAC or 100–370 VDC. This converter features through hole mounting in a 4-DIP module case and carries certifications including CB Scheme, EN, IEC, and UL. The PSK-S20C-24 is classified as obsolete, necessitating the search for suitable replacement AC/DC converters with matching electrical, mechanical, and regulatory characteristics for continued system support and new designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Output Voltage | 24V |
| Output Current (Max) | 833mA |
| Power (Watts) | 20 W |
| Input Voltage (VAC) | 85 ~ 264 |
| Input Voltage (VDC) | 100 ~ 370 |
| Number of Outputs | 1 |
| Mounting Type | Through Hole |
| Package / Case | 4-DIP Module |
| Operating Temperature | -40°C ~ 70°C (With Derating) |
| Efficiency | 83% |
| Approval Agency | CB Scheme, EN, IEC, UL |
| Regulations/Standards | 55024; 55032 Class A; 60950-1; 61000-3-2; 62368-1 |
| RoHS Status | RoHS Compliant |
| REACH Status | REACH Unaffected |
| HTSUS | 8504.40.9510 |
Substitute Part Grouping Explanation
Substitution is determined strictly by matching the main parameters relevant for AC/DC converter selection:
- Output voltage must be 24V
- Maximum output current near or equal to 833mA
- Output power capability at least 20 W
- Universal or wider input voltage range compatible with original input specifications
- Same number of outputs (1)
- Through hole mounting and similar DIP module form factor
- Certified compliance (RoHS, REACH, relevant safety standards)
- Comparable or better efficiency and operating temperature
Only parts meeting these criteria are included as equivalents or substitutes.
Parameter Comparison
| Parameter | PSK-S20C-24 CUI Inc. |
PSK-20D-24 CUI Inc. |
RAC20-24SK Recom Power |
|---|---|---|---|
| Output Voltage | 24V | 24V | 24V |
| Output Current (Max) | 833mA | 830mA | 840mA |
| Power (Watts) | 20 W | 20 W | 20 W |
| Input Voltage (VAC) | 85 ~ 264 | 85 ~ 305 | 85 ~ 264 |
| Input Voltage (VDC) | 100 ~ 370 | 100 ~ 430 | 120 ~ 370 |
| Number of Outputs | 1 | 1 | 1 |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package / Case | 4-DIP Module | 6-DIP Module, 4 Leads | 5-DIP Module, 4 Leads |
| Operating Temp (°C) | -40 ~ 70 (With Derating) | -40 ~ 85 (With Derating) | -40 ~ 85 (With Derating) |
| Efficiency | 83% | 87% | 85% |
| Approval Agency | CB Scheme, EN, IEC, UL | CE, cURus | CB, CE, cURus |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| HTSUS | 8504.40.9510 | 8504.40.9510 | 8504.40.9510 |
Engineering Selection Recommendations
When selecting a substitute AC/DC converter for PSK-S20C-24, the product’s obsolete status and the need for RoHS and REACH compliance must be considered. Substitute models such as PSK-20D-24 (CUI Inc.) and RAC20-24SK (Recom Power) meet or exceed the original’s input and output design criteria, provide through hole installation, and are compliant with international standards. Approval agency certifications and stated compliance status are confirmed as per manufacturer specifications.
Frequently Asked Questions (FAQ)
Q: What key specifications must be matched when selecting a substitute for PSK-S20C-24?
A: Output voltage, output current, power rating, input voltage range, mounting type, and package/case are critical. Regulatory compliance and agency approvals should also match application requirements.
Q: Are there differences in the package or pinout I should consider?
A: Substitute models use similar DIP module formats but with differences in the number of leads. Review the package/case description to confirm mechanical compatibility.
Q: How do approval agencies and compliance requirements affect substitution?
A: Substitute parts include listings for agency approvals (such as CB, IEC, CE, cURus, UL) and standards compliance, directly supporting qualification in regulated markets.
Q: Will there be any differences in performance?
A: Substitutes provided maintain or exceed parameters such as efficiency and operating temperature. Compare values in the table to verify alignment with application expectations.
Q: Are all substitutes RoHS and REACH compliant?
A: All listed substitutes are identified as RoHS (or ROHS3) compliant and REACH unaffected per the supplied information.
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