RN-0505S RECOM Power Power Supply (Other) In Stock
The RECOM RN-0505S is an unregulated 5 V to 5 V isolated DC/DC converter module accepting a 4.5 V to 5.5 V input and delivering a single isolated 5 V output in a compact 4-pin DIP package, providing galvanic isolation for signal and power interfaces in industrial and communications equipment.
- Manufacturer
- RECOM Power
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- RN-0505S Datasheet PDF
- Category
- Power Supply
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4.5 V to 5.5 V input range accepts standard 5 V logic and USB power rails directly
- Single isolated 5 V output provides galvanic isolation without external transformer winding
- 4-pin DIP package enables through-hole PCB integration with minimal footprint and simple layout
- Unregulated single-output topology minimizes solution cost for low-power isolated power requirements
- RoHS-compliant construction meets global environmental compliance for industrial and commercial designs
Applications
The RN-0505S is used to provide isolated power to RS-232, RS-485, and CAN bus interface circuits where a ground potential difference between equipment must be blocked to prevent data errors or ground-loop currents. Its compact 4-pin DIP form factor suits signal isolator daughter boards, isolated sensor supply rails, and protection circuits in industrial PLCs, HVAC controllers, and medical instrument peripherals. The 5 V-to-5 V topology also powers isolated ADC reference supplies in data-acquisition modules that share a common 5 V backplane.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 5 |
| Analog IC - Other Type | DC-DC UNREGULATED POWER SUPPLY MODULE |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDIP-T4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.25A |
| Output Voltage-Max | 5.25V |
| Output Voltage-Min | 4.75V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP4/8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Total Power Output-Max | 1.25W |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Mainland China, Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for RN-0505S:
suggested
Frequently Asked Questions
What input voltage range does the RN-0505S accept, and can it operate directly from a USB 5 V rail?
The RN-0505S accepts an input from 4.5 V to 5.5 V, which encompasses the USB 5 V tolerance band defined by the USB 2.0 specification (4.75 V to 5.25 V). It can therefore be powered directly from a USB supply, a regulated 5 V bus, or a 5 V bench power source without additional input conditioning, making it convenient for USB-to-isolated-bus adapters and PC-based instrumentation.
How does galvanic isolation from the RN-0505S protect RS-485 transceivers in industrial networks?
Industrial RS-485 networks connecting equipment across large facilities can develop ground potential differences of 100 V or more between nodes. The RN-0505S provides galvanic isolation between the system 5 V rail and the bus transceiver supply, blocking these fault voltages from propagating into the control CPU. A typical isolated RS-485 interface using the RN-0505S paired with an isolated signal coupler achieves 1 kV to 2.5 kV isolation voltage, protecting sensitive logic from surge and common-mode transients.
Is the RN-0505S regulated, and how should designers handle load-dependent output voltage variation?
The RN-0505S is an unregulated converter, meaning output voltage varies with load current — typically from around 5.5 V at no load to approximately 5 V at rated load. For loads requiring a stable voltage within ±5%, designers should add a low-dropout linear regulator (LDO) on the output or ensure the downstream circuit tolerates a 5 V to 5.5 V input range. For purely digital isolated supplies this variation is usually acceptable without additional regulation.
What PCB layout considerations apply when mounting the RN-0505S 4-pin DIP package?
The 4-pin DIP package uses standard 2.54 mm (100 mil) through-hole pitch, fitting common DIP footprints with no custom land pattern required. Place input decoupling capacitors of at least 10 µF and 100 nF within 5 mm of the input pins to suppress switching noise, and keep the isolated output traces separated from input-side copper by the required creepage distance — typically 4 mm minimum for basic isolation per IEC 60950-1 for 250 V working voltage.
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