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Equivalent & Substitute Parts Reference: PSK-S25B-48
Part Overview
The CUI Inc. PSK-S25B-48 is an enclosed AC/DC converter, providing 48V output at up to 520mA from a universal 90 ~ 264 VAC or 120 ~ 370 VDC input, rated for 25W. It features through-hole mounting in a 4-DIP module package and is suitable for household appliances and ITE (commercial) applications. The product is RoHS3 compliant and meets multiple global safety standards. As the PSK-S25B-48 is obsolete, it is necessary to identify functionally equivalent alternative models to support ongoing designs, maintenance, or replacement needs.
Substiute Parts
Key Parameters
| Parameter | PSK-S25B-48 |
|---|---|
| Manufacturer | CUI Inc. |
| Description | AC/DC CONVERTER 48V 25W |
| Series | PSK-S25B (25W) |
| Product Status | Obsolete |
| Type | Enclosed |
| Number of Outputs | 1 |
| Voltage - Input | 90 ~ 264 VAC, 120 ~ 370 VDC |
| Voltage - Output 1 | 48V |
| Current - Output (Max) | 520mA |
| Power (Watts) | 25 W |
| Applications | Household Appliances, ITE (Commercial) |
| Mounting Type | Through Hole |
| Package / Case | 4-DIP Module |
| Size / Dimension | 2.09" L x 1.19" W x 0.98" H |
| Approval Agency | CB Scheme, EN, IEC, SIQ, TUV, UL |
| Standard Number | 55024; 55032 Class A; 60950-1; 61000-3-2; 61000-3-3; 61000-6-1; 61000-6-2; 61204-3; 62368-1 |
| Line Regulation | ±1% |
| Load Regulation | ±1% |
| Efficiency | 87% |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for PSK-S25B-48 is based strictly on matching critical operational parameters such as input and output voltages, output current, total power rating, output configuration, mounting type, and package form factor. Compatibility in compliance standards, agency approvals, and RoHS status are also considered. Only parts that match or exceed the original electrical and mechanical specifications and are verified as functionally equivalent per the input are listed.
Key parameters for substitution:
- Manufacturer: CUI Inc.
- Voltage - Output 1: 48V
- Output Current: ≥ 520mA
- Power: ≥ 25W
- Number of Outputs: 1
- Input Voltage Range: Matching or wider
- Mounting Type: Through Hole
- Package / Case: 4-DIP Module
- RoHS and certification agency status
Parameter Comparison
| Parameter | PSK-S25B-48 | PSK-30D-48 |
|---|---|---|
| Manufacturer | CUI Inc. | CUI Inc. |
| Description | AC/DC CONVERTER 48V 25W | AC/DC CONVERTER 48V 30W |
| Series | PSK-S25B (25W) | PSK-30D |
| Product Status | Obsolete | Active |
| Type | Enclosed | Enclosed |
| Number of Outputs | 1 | 1 |
| Voltage - Input | 90 ~ 264 VAC, 120 ~ 370 VDC | 85 ~ 305 VAC, 120 ~ 430 VDC |
| Voltage - Output 1 | 48V | 48V |
| Current - Output (Max) | 520mA | 630mA |
| Power (Watts) | 25 W | 30 W |
| Applications | Household Appliances, ITE (Commercial) | Household Appliances, ITE (Commercial) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 4-DIP Module | 4-DIP Module |
| Size / Dimension | 2.09" L x 1.19" W x 0.98" H | 2.74" L x 1.54" W x 0.94" H |
| Approval Agency | CB Scheme, EN, IEC, SIQ, TUV, UL | CE, cURus, UKCA |
| Standard Number | 55024; 55032 Class A; 60950-1; 61000-3-2; 61000-3-3; 61000-6-1; 61000-6-2; 61204-3; 62368-1 | 60335-1; 62368-1 |
| Line Regulation | ±1% | ±0.5% |
| Load Regulation | ±1% | ±1% |
| Efficiency | 87% | 90% |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The PSK-S25B-48 is obsolete, with active inventory limited to 885 pieces. The recommended substitute, PSK-30D-48, is an active product line with 1067 pieces in stock. Both parts are RoHS3 compliant and support certifications for appliance and ITE applications. Substitute selection is restricted to parts meeting or exceeding output voltage, output current, package, and mounting requirements as seen above. Certification standards differ; selection must be based on the specific regulatory requirements relevant to the target application.
Frequently Asked Questions (FAQ)
Q1: What is the critical parameter for selecting a substitute for PSK-S25B-48?
A1: Output voltage (48V), output current (minimum 520mA), power rating (minimum 25W), input voltage compatibility, mounting type (through hole), and package (4-DIP module) are the mandatory parameters for equivalency.
Q2: Is the PSK-30D-48 a direct physical fit replacement for PSK-S25B-48?
A2: Both use a 4-DIP module package and through-hole mounting, but the overall dimensions differ. Mechanical fit should match the provided dimensions.
Q3: Can the PSK-30D-48 be used in the same applications as PSK-S25B-48?
A3: Both parts are designed for household appliance and ITE (commercial) applications. Refer to compliance certifications for suitability in specific environments.
Q4: Are there differences in regulatory certifications between these models?
A4: Yes. Approval agencies and standard numbers differ. Review which certifications are required for your use case by comparing CB Scheme, EN, IEC, TUV, and UL (PSK-S25B-48) to CE, cURus, and UKCA (PSK-30D-48).
Q5: Do these substitutes have the same environmental and RoHS compliance status?
A5: Both the original and substitute parts are ROHS3 compliant. Check the provided RoHS and MSL data in the comparison table.
Q6: How does efficiency compare between options?
A6: The PSK-30D-48 offers higher efficiency (90%) compared to PSK-S25B-48 (87%), based only on provided data.
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