{"product_id":"enclosed-type-133-4w-rd-125b-ac-dc-dual-output-switching-power-supply","title":"Enclosed Type 133.4W RD-125B AC-DC Dual Output Switching Power Supply","description":"\u003cp\u003eOur review of the Enclosed Type 133.4W RD-125B explains why this MEAN WELL switching power supply is a practical choice for demanding industrial and automation projects: it delivers two regulated rails, reliable voltage stability and robust input protection in a compact enclosure. For users who need both 5V and 24V outputs from a single unit and expect continuous operation across a wide input range, the RD-125B stands out for its efficiency and surge tolerance. The review focuses on real-world applicability, performance characteristics and where this supply fits in typical system builds.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Outputs:\u003c\/strong\u003e Provides dedicated 5V and 24V DC rails with up to 4.6A available on each channel for powering logic circuits and control devices simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Power:\u003c\/strong\u003e Delivers a combined 133.4W output which is useful when a single enclosure must feed multiple loads without adding a second supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Input Range:\u003c\/strong\u003e Switch-selectable 88-132VAC\/176-264VAC or 248-373VDC operation gives flexibility for international or varied line conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Withstand:\u003c\/strong\u003e Can tolerate a 300VAC surge for 5 seconds, providing added resilience against line transients in industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Stability:\u003c\/strong\u003e Main channel accuracy of 5% with 1% line regulation and 3% load regulation keeps sensitive electronics within safe voltage limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Noise and Efficiency:\u003c\/strong\u003e Typical efficiency around 85% and low ripple\/noise (max 80mVp-p) help reduce heat and interference in signal circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe RD-125B is best suited to system integrators, industrial automation technicians, and lab engineers who need a compact, reliable dual-rail supply for controllers, sensors and peripheral modules. Its combination of 5V and 24V outputs eliminates the need for separate supplies when those rails are commonly required together.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing programmable outputs, isolated floating rails, or ultra-low noise ratings beyond 80mVp-p; likewise, projects requiring higher continuous power than 133.4W will need a larger unit.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDual regulated outputs give convenient 5V and 24V rails from one enclosed unit.\u003c\/li\u003e\n\u003cli\u003eWide input range and the ability to survive a 300VAC surge improve deployment flexibility.\u003c\/li\u003e\n\u003cli\u003eGood efficiency (typical 85%) and low ripple\/noise reduce thermal stress and interference.\u003c\/li\u003e\n\u003cli\u003eStable voltage characteristics with tight line and load regulation support sensitive electronics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot intended for applications that require isolated or programmable output channels beyond fixed 5V and 24V.\u003c\/li\u003e\n\u003cli\u003eTotal 133.4W may be limiting for larger systems that need more continuous power from a single supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRD-125B RD-125 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003eDual: 5V DC and 24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Channel\u003c\/td\u003e\n\u003ctd\u003e4.6A each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Output Power\u003c\/td\u003e\n\u003ctd\u003e133.4W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Efficiency\u003c\/td\u003e\n\u003ctd\u003e85%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e88-132VAC or 176-264VAC (switch selectable), 248-373VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25C to +75C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Enclosed Type 133.4W RD-125B is a solid, practical dual-rail switching power supply for industrial control and embedded systems that need both 5V and 24V rails. Its wide input tolerance, surge resistance and stable regulation make it good value for integrators seeking a dependable enclosed unit without exotic features.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this unit handle international mains voltages?\u003c\/strong\u003e\u003cbr\u003eYes; it supports switch-selectable 88-132VAC or 176-264VAC and can also accept 248-373VDC, giving flexibility for different line standards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat protection does it provide against line surges?\u003c\/strong\u003e\u003cbr\u003eThe supply is rated to withstand a 300VAC surge for 5 seconds without damage, providing robustness against short transient events.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 5V and 24V output isolated from each other?\u003c\/strong\u003e\u003cbr\u003eThe product description indicates dual outputs but does not specify isolated floating rails, so assume standard fixed dual outputs rather than isolated programmable channels.\u003c\/p\u003e","brand":"MEAN WELL","offers":[{"title":"Default Title","offer_id":48245216149723,"sku":"B0182BR5GA","price":39.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61rSPiGc63L._AC_SL1500.jpg?v=1771061861","url":"https:\/\/gearmusthave.com\/products\/enclosed-type-133-4w-rd-125b-ac-dc-dual-output-switching-power-supply","provider":"GearMustHave","version":"1.0","type":"link"}