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PBO-3-S24 Equivalent & Substitute Parts Reference
Part Overview
The PBO-3-S24 from CUI Inc. is an open frame AC/DC converter with 1 output rated at 24V, 125mA, and 3W. This model has an input voltage range of 85 ~ 305 VAC or 70 ~ 430 VDC. The converter is through-hole mounted and housed in a 12-SIP, 6-lead module format. It is classified as obsolete. As the PBO-3-S24 is no longer in active production, identifying compliant, electrically and mechanically compatible alternatives is essential for ongoing system design, maintenance, and repair requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PBO-3-S24 |
| Series | PBO-3 (3W) |
| Product Status | Obsolete |
| Type | Open Frame |
| Number of Outputs | 1 |
| Voltage - Input | 85 ~ 305 VAC, 70 ~ 430 VDC |
| Voltage - Output 1 | 24V |
| Current - Output (Max) | 125mA |
| Power (Watts) | 3 W |
| Operating Temperature | -40°C ~ 85°C (With Derating) |
| Efficiency | 80% |
| Mounting Type | Through Hole |
| Package / Case | 12-SIP Module, 6 Leads |
| Size / Dimension | 1.38" L x 0.43" W x 0.71" H (35.0mm x 11.0mm x 18.0mm) |
| Approval Agency | CB Scheme, EN, IEC, UL |
| Standard Number | 55024; 55032 Class A; 60950-1; 61000-3-2; 61000-3-3 |
| Line Regulation | ±1.5% |
| Load Regulation | ±2.5% |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| ECCN | EAR99 |
Substitute Part Grouping Explanation
Substitute AC/DC converters are selected strictly based on matching or exceeding all provided critical parameters, including output voltage, output current, input voltage rating, power rating, efficiency, mounting type, and operating temperature range. Only units meeting compliance, regulatory, and mechanical compatibility requirements are included as valid substitutes. Packaging and approvals are considered only as explicitly provided in the data.
Parameter Comparison
| Parameter | PBO-3-S24 | PBO-3C-24 | PSK-3D-24 |
|---|---|---|---|
| Manufacturer Part Number | PBO-3-S24 | PBO-3C-24 | PSK-3D-24 |
| Type | Open Frame | Open Frame | Enclosed |
| Number of Outputs | 1 | 1 | 1 |
| Voltage - Input | 85 ~ 305 VAC, 70 ~ 430 VDC | 85 ~ 305 VAC, 70 ~ 430 VDC | 85 ~ 305 VAC, 100 ~ 430 VDC |
| Voltage - Output 1 | 24V | 24V | 24V |
| Current - Output (Max) | 125mA | 125mA | 125mA |
| Power (Watts) | 3 W | 3 W | 3 W |
| Operating Temperature | -40°C ~ 85°C (With Derating) | -40°C ~ 85°C (With Derating) | -40°C ~ 85°C (With Derating) |
| Efficiency | 80% | 80% | 79% |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package / Case | 12-SIP Module, 6 Leads | 6-SIP Module | 5-DIP Module, 4 Leads |
| Size / Dimension | 1.38" x 0.43" x 0.71" | 1.04" x 0.43" x 0.49" | 1.00" x 1.00" x 0.69" |
| Approval Agency | CB Scheme, EN, IEC, UL | CE, cURus | CE, cURus |
| Standard Number | 55024; 55032 Class A; 60950-1; 61000-3-2; 61000-3-3 | 60335-1; 62368-1 | 60335-1; 62368-1 |
| Line Regulation | ±1.5% | ±1.5% | ±0.5% |
| Load Regulation | ±2.5% | ±3% | ±1% |
| RoHS Status | RoHS Compliant | RoHS Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | Not Applicable | 1 (Unlimited) |
| ECCN | EAR99 | EAR99 | EAR99 |
Engineering Selection Recommendations
For any instance where the PBO-3-S24 is specified and not available due to its obsolete status, selection of direct equivalents and substitutes such as PBO-3C-24 or PSK-3D-24 is supported, provided that all electrical, mechanical, and regulatory parameters from the listing are met. The RoHS and ECCN statuses are equivalent, ensuring continued compliance in regulated applications. Approval and certification differences should be matched to system requirements based on listing only.
Frequently Asked Questions (FAQ)
Q1: What are the critical parameters for substituting the PBO-3-S24?
A1: Output voltage (24V), maximum output current (125mA), power rating (3W), input voltage range (85 ~ 305 VAC / DC input rating), mounting type (Through Hole), operating temperature, and basic regulatory compliance as listed.
Q2: Are the replacement modules physically identical in size and footprint?
A2: Substitute parts such as PBO-3C-24 and PSK-3D-24 have different package dimensions and module formats. Verify the actual package description and dimension to ensure mechanical compatibility.
Q3: Do substitute AC/DC converters carry the same approvals as the obsolete PBO-3-S24?
A3: Substitute parts provide alternative certifications as listed (CE, cURus, etc.). These may differ from the original part (CB Scheme, EN, IEC, UL).
Q4: Is there a difference in efficiency or regulation characteristics among substitutes?
A4: The listed substitutes have similar efficiency, with minor variation (79%–80%), and the line/load regulation is provided in the parameter comparison.
Q5: Are all listed substitutes RoHS compliant?
A5: All listed alternatives are RoHS or ROHS3 compliant per input data.
Q6: What mounting format do the substitutes use?
A6: All substitutes support through-hole mounting as specified for PBO-3-S24.
Q7: Are the moisture sensitivity levels equivalent among substitutes?
A7: All listed substitutes provide Not Applicable or MSL 1 (Unlimited) ratings, with no handling limitations.
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