PSR54-9IR Equivalent & Substitute Parts Reference

Part Overview

The PSR54-9IR is a DC DC converter from Bel Power Solutions in the Melcher PSR series. It is a non-isolated Point-of-Load (PoL) module with conformal coating, designed for commercial ITE and railway applications. This product is active and available in inventory, but alternative models may be required to satisfy specific design requirements, second-sourcing, or continuity of supply purposes.

Substiute Parts

PSR54-9IR

Bel Power SolutionsIn Stock: 834PSR54-9IR Datasheet

Current PartRFQ

PSA55-7R

Bel Power SolutionsIn Stock: 869PSA55-7R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined strictly by key electrical and mechanical compatibility parameters: input voltage range, output voltage, output current capacity, product type, number of outputs, efficiency, compliance status, mounting style, and package dimensions. Substitute models are listed only if they match these essential requirements for direct interchangeability in DC DC converter applications for ITE and railway environments.

Key parameters for grouping:

• Voltage - Input (Min, Max)
• Voltage - Output 1
• Current - Output (Max)
• Type and number of outputs
• Efficiency
• Mounting Type
• Package / Case
• Size / Dimension
• RoHS Status
• Product Status

Parameter Comparison

Engineering Selection Recommendations

Both PSR54-9IR and PSA55-7R are listed as active products and are ROHS3 compliant. Inventory is available for both part numbers. Substitute selection must be based on matching electrical parameters, package type, compliance status, and current product availability. Both modules meet these criteria and are suitable for use in ITE (Commercial) and Railway applications per specification.

Frequently Asked Questions (FAQ)

Q: What parameters must be matched for DC DC converter substitution?
A: Substitution requires matching input voltage range, output voltage, maximum output current, module type, mounting style, package dimensions, number of outputs, and compliance status.

Q: Is the package and pinout compatible between PSR54-9IR and PSA55-7R?
A: Both models use the 6-DIP Module package with identical dimensions (2.76" x 1.98" x 0.99"), matching mechanical requirements for direct placement.

Q: Can PSA55-7R be used in applications specified for PSR54-9IR?
A: PSA55-7R matches all listed key parameters and is suitable for applications requiring non-isolated PoL DC DC conversion with 5V output in commercial and railway settings.

Q: Does the substitute part maintain regulatory compliance?
A: Both PSR54-9IR and PSA55-7R are ROHS3 compliant and REACH unaffected, supporting direct selection where environmental and material compliance is required.

Q: Where does mounting type affect compatibility?
A: Both modules are through hole mounted, ensuring mechanical compatibility within boards designed for the 6-DIP footprint.

Q: How does the maximum output current affect substitution?
A: PSA55-7R offers up to 5A output current compared to 4A for PSR54-9IR; ensure your application does not exceed the lower current rating when substituting.