RO-2405S RECOM Power Power Supply (Other) In Stock
The RO-2405S is a compact unregulated DC/DC converter module from RECOM Power with a 24 V nominal input (21.6 V to 26.4 V) and a 5 V output in a 4-pin SIP package. It delivers single-output isolation for powering logic or sensor circuits from industrial 24 V rails with up to 15% load regulation. Available in tape-and-reel SIP4 format for automated PCB assembly in industrial control and instrumentation equipment.
- Manufacturer
- RECOM Power
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- RO-2405S 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
- 24 V nominal input (21.6 V to 26.4 V range) ideal for direct connection to industrial 24 V DC buses
- Single 5 V output in a compact 4-pin SIP package for minimal PCB footprint
- Galvanic isolation separates input and output grounds, reducing noise coupling in sensor applications
- REACH-compliant construction with no restricted substances for global industrial market access
Applications
The RO-2405S is used to power 5 V logic circuits, microcontrollers, and sensors directly from the 24 V DC bus found in PLC-based industrial automation systems, removing the need for a discrete linear regulator and its heat dissipation overhead. Its galvanic isolation between the 24 V input and 5 V output is valuable in field instrument loops where ground potential differences between segments could introduce measurement errors. It is also deployed in building automation controllers, motor drive auxiliary supplies, and remote I/O modules where a self-contained isolated DC/DC module in a SIP footprint simplifies board layout.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 6.4 |
| Analog IC - Other Type | DC-DC UNREGULATED POWER SUPPLY MODULE |
| Input Voltage-Max | 26.4V |
| Input Voltage-Min | 21.6V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | R-XSMA-P4 |
| Load Regulation-Max | 15% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.2A |
| Output Voltage-Max | 5.25V |
| Output Voltage-Min | 4.75V |
| Output Voltage-Nom | 5V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | SIP4,.18 |
| Package Shape | RECTANGULAR |
| Package Style | MICROELECTRONIC ASSEMBLY |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Technology | HYBRID |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | PIN/PEG |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Total Power Output-Max | 1W |
| Trim/Adjustable Output | NO |
| 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 RO-2405S:
suggested
Frequently Asked Questions
What is the input voltage range of the RO-2405S, and is it directly compatible with a 24 V industrial PLC bus?
The RO-2405S accepts 21.6 V to 26.4 V input, which corresponds to ±10% tolerance on a nominal 24 V DC bus — the standard supply voltage for industrial PLCs, fieldbus segments, and process control instruments. This means the module can be connected directly to a 24 V rail without a pre-regulator, simplifying the power tree in control panel designs and reducing component count by at least 2 passive elements.
What is the load regulation specification, and how does it affect output voltage accuracy for sensor circuits?
The RO-2405S has a maximum load regulation of 15%, meaning the 5 V output can vary by up to 0.75 V between no-load and full-load conditions. For microcontroller and digital logic circuits with a 3.3 V to 5.5 V tolerance, this is acceptable without additional regulation; however, precision analog sensor circuits requiring better than 1% voltage stability would need a downstream low-dropout linear regulator to tighten the output to within ±50 mV.
Does the RO-2405S provide galvanic isolation, and what benefit does this offer in industrial field wiring?
Yes, the RO-2405S provides DC isolation between the 24 V input and the 5 V output, breaking ground loops that would otherwise form when multiple instruments share a common control bus ground. In 4-wire sensor networks and thermocouple amplifier circuits, isolation prevents millivolt-level ground potential differences — which can range from tens to hundreds of millivolts across a factory floor — from appearing as measurement errors on the 5 V analog signal chain.
How does the 4-pin SIP package of the RO-2405S simplify PCB integration compared to a multi-component discrete converter design?
The 4-pin SIP footprint integrates the transformer, switching circuitry, and output rectifier into a single 4.6×7.6 mm through-hole module, replacing a discrete design that would require at least 8 to 12 components including a controller IC, transformer, diodes, inductors, and filter capacitors. PCB real estate savings are approximately 200 mm² compared to a discrete implementation, and the single footprint eliminates the layout-sensitive transformer placement challenge in switching converter designs.
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