There is always a catch when an AC/DC power supply gets smaller. Reducing the footprint sounds useful, but once power density starts rising, the module has to keep efficiency high, waste heat under control, and safety compliance intact, all while sitting right at the front end of the system. That becomes more noticeable in compact industrial and medical equipment, where the power stage cannot take up much room but still has to deal with wide mains input and awkward operating conditions.
That is what makes RECOM’s RACM65S-K/277 worth a closer look. The RACM65S-K/277 is a 65 W AC/DC power module designed for PCB-mount front-end power conversion in industrial, medical, and household systems. In a typical control unit, diagnostic instrument, or building automation product, this kind of converter takes the incoming AC supply and generates the regulated DC rail that the rest of the electronics depend on.
RECOM says the module delivers up to 65 W from a package measuring 52.5 mm x 40 mm x 25 mm, with industry-standard P12+ pinning. That gives the part a quoted power density of 20 W/in³, which is a strong figure for an encapsulated PCB-mount AC/DC converter. Small size alone is not enough, of course, but in products where board area is limited, this kind of density can remove some of the usual front-end layout pressure.
Wide Input Range Makes It Easier To Use Across Different Systems
One of the more practical details here is the input range. The RACM65S-K/277 accepts 85 VAC to 305 VAC, which pushes past the usual universal-input description and makes the module more useful in systems expected to tolerate a wider range of mains conditions. That matters in industrial and infrastructure equipment where the supply is not always as well behaved as it is in office or consumer products.
RECOM also rates the series for over-voltage category III up to 3000 m altitude, and up to 5000 m in encapsulated variants under OVC II. That gives the module a broader installation envelope and helps explain why RECOM is aiming it at several sectors rather than a single narrow application area.
Efficiency And Protection Matter More Than The Footprint Alone
A compact converter only stays attractive if it does not create new thermal problems elsewhere. RECOM quotes peak efficiency of over 90%, with that efficiency maintained down to 10% load, while typical no-load power consumption is less than 100 mW. Those numbers are useful because a lot of real equipment spends long periods lightly loaded rather than running flat out.
The RACM65S-K/277 is available with fixed outputs of 5 V, 12 V, 15 V, 24 V, 36 V, and 52 VDC. Full short-circuit, over-voltage, and over-current protection are included as well. That gives the family enough flexibility to cover low-voltage control electronics as well as higher-voltage rails in embedded and industrial systems.
Medical And Industrial Approvals Broaden The Appeal
RECOM says international safety certifications are available for medical, industrial, and household applications, with operation at ambient temperatures up to 90 °C. The modules comply with EN 55032 Class B for floating outputs, while the grounded-output /OIB and /EIB variants meet requirements without an external filter. In medical applications, the parts are rated 2MOPP and are suitable for BF applications.
There is also an open-frame chassis-mount version with an optional cover, measuring 79 mm x 40.8 mm x 32 mm. That gives designers another mechanical option where PCB space is tight or where off-board mounting makes thermal or service access easier.
The RACM65S-K/277 does not try to do anything dramatic. What it does offer is a dense 65 W front-end AC/DC module with a wide input range, strong efficiency, and a set of approvals that should make it easier to drop into several classes of equipment without a lot of extra compromise.
Learn more and read the original announcement at www.recom-power.com
Technology Overview
The RACM65S-K/277 is a 65 W AC/DC power module for PCB-mount and chassis-mount applications. It accepts 85 VAC to 305 VAC input and is available with fixed 5 V, 12 V, 15 V, 24 V, 36 V, or 52 VDC outputs. The module is designed for industrial, medical, and household use, with peak efficiency above 90%.
View the RACM65S-K/277 datasheet.
Frequently Asked Questions
What is the RACM65S-K/277 used for?
It is used as an AC/DC front-end power module in compact industrial, medical, and household equipment.
What input voltage range does the RACM65S-K/277 support?
RECOM specifies an input range of 85 VAC to 305 VAC.
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