PSR54-7IP DC DC Converter Equivalent & Substitute Parts

Part Overview

The PSR54-7IP is a non-isolated Point-of-Load (PoL) module manufactured by Bel Power Solutions, part of the Melcher PSR series. This conformal-coated DC DC converter delivers a single 5V output at 4A maximum current from a 7V to 40V input range. The device is designed for ITE (Commercial) and Railway applications, featuring remote on/off control, output current protection (OCP), short-circuit protection (SCP), and under-voltage lockout (UVLO). The PSR54-7IP maintains an active product status with 882 units in current inventory.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where the primary part may be unavailable or where alternative electrical characteristics better suit specific system demands.

Substiute Parts

PSR54-7IP

Bel Power SolutionsIn Stock: 893PSR54-7IP Datasheet

Current PartRFQ

PSA55-7R

Bel Power SolutionsIn Stock: 869PSA55-7R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PSR54-7IP are identified based on electrical and mechanical compatibility within the allowed parameter ranges for this product category. The substitution logic is based on the following critical parameters:

Output Voltage Compatibility: The substitute part must deliver the same 5V output voltage to maintain circuit compatibility.

Input Voltage Range: The substitute part must accept the same minimum input voltage (7V). The maximum input voltage may differ; substitutes with equal or greater maximum input voltage ratings are acceptable.

Output Current Capacity: The substitute part must deliver equal or greater maximum output current to support the same or higher load requirements.

Physical Form Factor: The substitute part must use the same 6-DIP Module package and identical physical dimensions to ensure PCB mounting compatibility.

Operating Temperature Range: The substitute part must maintain the same operating temperature range (-25°C to 71°C) for thermal environment compatibility.

Conformal Coating and Protection Features: The substitute part must maintain conformal coating and protection feature parity for environmental robustness.

Regulatory Compliance: The substitute part must maintain ROHS3 compliance and REACH Unaffected status.

Parameter Comparison

Engineering Selection Recommendations

PSA55-7R as Substitute for PSR54-7IP:

The PSA55-7R is a direct substitute for the PSR54-7IP in applications where the input voltage does not exceed 35V. Both parts are manufactured by Bel Power Solutions and share identical output voltage (5V), minimum input voltage (7V), operating temperature range (-25°C to 71°C), efficiency (83%), physical dimensions, and regulatory compliance (ROHS3 Compliant, REACH Unaffected).

The PSA55-7R provides enhanced output current capacity (5A versus 4A), making it suitable for applications requiring higher load current within the same thermal and physical envelope. Both parts maintain active product status and are currently in inventory.

Selection Criteria:

Use the PSR54-7IP when the application requires operation at input voltages between 35V and 40V, as the PSA55-7R maximum input rating is limited to 35V.

Use the PSA55-7R when the application operates within the 7V to 35V input range and requires output current capacity of 4A or higher, or when supply chain availability favors this part number.

Both parts are suitable for ITE (Commercial) and Railway applications with identical environmental protection through conformal coating and identical control features (Enable, Active Low).

Frequently Asked Questions (FAQ)

Q: Can the PSA55-7R replace the PSR54-7IP in all applications?

A: The PSA55-7R is a direct substitute for applications where the input voltage remains within the 7V to 35V range. If your system requires operation at input voltages between 35V and 40V, the PSR54-7IP must be used. Both parts deliver identical 5V output and operate across the same temperature range.

Q: What is the difference in output current capacity between these parts?

A: The PSR54-7IP delivers 4A maximum output current, while the PSA55-7R delivers 5A maximum output current. The PSA55-7R provides 25% higher current capacity within the same physical package and thermal specifications.

Q: Are the physical dimensions identical?

A: Yes. Both the PSR54-7IP and PSA55-7R use the 6-DIP Module package with identical dimensions of 2.76" L x 1.98" W x 0.99" H (70.2mm x 50.2mm x 25.2mm). Direct PCB mounting compatibility is maintained.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited). Both are conformal coated for environmental protection.

Q: What input voltage range does each part support?

A: The PSR54-7IP accepts input voltages from 7V to 40V. The PSA55-7R accepts input voltages from 7V to 35V. Both parts share the same 7V minimum input threshold.

Q: Are the control features identical?

A: The PSR54-7IP features remote on/off control, OCP, SCP, and UVLO with Enable control (Active Low). The PSA55-7R specifications do not list specific control features in the provided data. Verify control feature requirements for your application before substitution.

Q: What is the operating temperature range for both parts?

A: Both the PSR54-7IP and PSA55-7R operate across the identical temperature range of -25°C to 71°C, suitable for commercial and railway environments.

Q: Are both parts currently in stock?

A: Yes. The PSR54-7IP has 882 units in inventory, and the PSA55-7R has 822 units in inventory, both listed as new original stock.