{"id":18763,"date":"2026-10-27T09:00:00","date_gmt":"2026-10-27T08:00:00","guid":{"rendered":"https:\/\/tps-elektronik.com\/?post_type=case_studies&#038;p=18763"},"modified":"2026-10-15T10:30:45","modified_gmt":"2026-10-15T08:30:45","slug":"how-to-cut-control-cabinet-heat-and-extend-capacitor-life-in-factory-automation-with-tps-high-efficiency-din-rail-power-supplies","status":"publish","type":"case_studies","link":"https:\/\/tps-elektronik.com\/en\/case-studies\/how-to-cut-control-cabinet-heat-and-extend-capacitor-life-in-factory-automation-with-tps-high-efficiency-din-rail-power-supplies\/","title":{"rendered":"How to Cut Control Cabinet Heat and Extend Capacitor Life in Factory Automation with TPS High Efficiency DIN Rail Power Supplies?"},"content":{"rendered":"<article class=\"blog-post\" lang=\"en\"><header>System integrators, panel builders, and procurement teams in factory automation rarely fail because they lack a control design. They lose time\u2014and budget\u2014when the DIN rail power supply inside a sealed control cabinet generates more waste heat than the cooling system can remove, causing electrolytic capacitor degradation, premature PSU failure, and unplanned production downtime.<br \/>TPS Elektronik&#8217;s <a href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">high efficiency DIN rail power supplies<\/a> built to eliminate that risk: up to 94% conversion efficiency, minimal waste heat generation, and capacitor life extension that reduces replacement frequency and operating costs across factory automation deployments.\n<p><a class=\"cta-primary\" href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">Discuss your control cabinet thermal requirements with TPS \u2192<\/a><\/p>\n<\/header><nav class=\"toc\" aria-label=\"Table of contents\">\n<h2 id=\"toc\">Table of contents<\/h2>\n<ol>\n<li><a href=\"#customer-challenge\">The customer challenge: PSU failures caused by control cabinet overheating<\/a><\/li>\n<li><a href=\"#why-heat-matters\">Why waste heat destroys capacitor life in DIN rail power supplies<\/a>\n<ol>\n<li><a href=\"#capacitor-temperature-rule\">The 10\u00b0C rule: every degree matters<\/a><\/li>\n<li><a href=\"#efficiency-heat-math\">The efficiency-to-heat calculation that determines PSU lifetime<\/a><\/li>\n<\/ol>\n<\/li>\n<li><a href=\"#tps-solution\">How TPS high efficiency DIN rail power supplies solved the problem<\/a>\n<ol>\n<li><a href=\"#efficiency-specs\">Efficiency specifications across the TPS portfolio<\/a><\/li>\n<li><a href=\"#field-results\">Measured results: temperature reduction and capacitor life extension<\/a><\/li>\n<\/ol>\n<\/li>\n<li><a href=\"#customer-outcome\">Customer outcome: energy savings and reduced downtime<\/a><\/li>\n<li><a href=\"#faq\">FAQ<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"customer-challenge\">\n<h2>1. The customer challenge: PSU failures caused by control cabinet overheating<\/h2>\n<p>A European system integrator specializing in factory automation for the food and beverage industry (name withheld under NDA) approached TPS Elektronik with a recurring problem: DIN rail power supplies inside their sealed stainless steel control cabinets were failing at a rate of 8-12% per year, well above the manufacturer&#8217;s specified 7-year service life.<\/p>\n<p>The cabinets installed in a high-ambient-temperature production hall where summer temperatures regularly exceeded 35\u00b0C. Because the cabinets sealed to IP66 for washdown protection, internal heat could not escape through ventilation. The power supplies\u2014standard 88% efficiency models\u2014generating 58W of waste heat each at full load, creating internal cabinet temperatures 20-25\u00b0C above ambient.<\/p>\n<p>For the procurement team, the consequence was clear: each unplanned PSU failure cost an estimated 4-6 hours of production downtime, plus the emergency replacement cost and the risk of collateral damage to adjacent PLC modules. Across 45 production lines, the annual cost of PSU failures exceeded \u20ac180,000.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-18872\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/10\/Control-Cabinet-Heat-Reduction-High-Efficiency-DIN-Rail-Power-Supply-1-1.jpg\" alt=\"Control Cabinet Heat Reduction High Efficiency DIN Rail Power Supply Hocheffizientes Hutschienen-Netzteil zur Reduzierung der W\u00e4rmeentwicklung im Schaltschrank\" width=\"1920\" height=\"1079\" \/><\/p>\n<\/section>\n<section id=\"why-heat-matters\">\n<h2>2. Why waste heat destroys capacitor life in DIN rail power supplies<\/h2>\n<p>The relationship between waste heat and power supply failure is not linear\u2014it is exponential. Minimum lifetime of a DIN rail power supply is determined by the lifetime of its electrolytic capacitors, and capacitor life halves for every 10\u00b0C increase in operating temperature.<\/p>\n<p>Relationship defined by the Arrhenius equation and documented in the IPC-9592B standard: operating temperature increases of 10\u00b0C reduce capacitor service life by 50%. The practical implication is that a seemingly small difference in PSU efficiency produces a disproportionately large difference in service life.<\/p>\n<h3 id=\"capacitor-temperature-rule\">2.1 The 10\u00b0C rule: every degree matters<\/h3>\n<p>Consider a DIN rail power supply with electrolytic capacitors rated for 5,000 hours at 105\u00b0C. At an internal capacitor temperature of 85\u00b0C, the calculated life extends to approximately 80,000 hours (over 9 years at continuous operation). When 95\u00b0C\u2014just 10\u00b0C higher\u2014the life drops to 40,000 hours (approximately 4.5 years). At 105\u00b0C, it returns to the rated 5,000 hours.<\/p>\n<p>In control cabinet applications, the capacitor&#8217;s operating temperature is the sum of the ambient temperature inside the cabinet plus the self-heating from ripple current and power losses. When a power supply operates at 88% efficiency, the waste heat it generates raises the internal cabinet temperature and, consequently, the capacitor temperature. A 94% efficiency power supply generates approximately half the waste heat for the same output power\u2014directly reducing capacitor temperature and extending service life.<\/p>\n<h3 id=\"efficiency-heat-math\">2.2 The efficiency-to-heat calculation that determines PSU lifetime<\/h3>\n<p>The calculation is straightforward. For a 480W DIN rail power supply operating at full load:<\/p>\n<ul>\n<li><strong>88% efficiency<\/strong>: Input power = 480W \u00f7 0.88 = 545W. Waste heat = 545W \u2212 480W = <strong>65W<\/strong><\/li>\n<li><strong>94% efficiency<\/strong>: Input power = 480W \u00f7 0.94 = 511W. Waste heat = 511W \u2212 480W = <strong>31W<\/strong><\/li>\n<\/ul>\n<p>The difference is 34W per power supply. In a sealed cabinet, that 34W translates to a temperature reduction of approximately 10-15\u00b0C, depending on cabinet surface area and thermal resistance. Based on the 10\u00b0C rule, that temperature reduction extends capacitor life by a factor of 2-2.8\u00d7.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-18867\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/10\/Electrolytic-Capacitor-Life-Temperature-DIN-Rail-Power-Supply-2.jpg\" alt=\"Electrolytic Capacitor Life Temperature DIN Rail Power Supply Lebensdauer von Elektrolytkondensatoren in Hutschienen-Netzteilen (in Abh\u00e4ngigkeit von der Temperatur)\" width=\"1920\" height=\"1079\" \/><\/p>\n<p>TDK-Lambda&#8217;s DRB480-48-1 achieves a verified 7-year life at 40\u00b0C ambient and 75% load, explicitly attributed to the design ensuring that electrolytic capacitor temperature rises are minimized. PULS power supplies achieve up to 95.6% efficiency, with the remaining 4.4% of input power lost as heat that must be managed through the cooling concept.<\/p>\n<p>For a deeper understanding of the component technology behind these efficiency gains, see TPS&#8217;s <a href=\"https:\/\/tps-elektronik.com\/en\/element-material-technology-advanced-applications\/\">element and material technology resource<\/a> and <a href=\"https:\/\/tps-elektronik.com\/en\/element-testing-laboratories-safety-global-expansion\/\">element testing laboratories guide<\/a>.<\/p>\n<p><a class=\"cta-primary\" href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">Request a thermal analysis for your control cabinets \u2192<\/a><\/p>\n<\/section>\n<section id=\"tps-solution\">\n<h2>3. How TPS high efficiency DIN rail power supplies solved the problem<\/h2>\n<p>TPS Elektronik approached the customer&#8217;s challenge as a system-level thermal problem, not a component replacement exercise. The solution combined PSU specification, cabinet thermal analysis, and a phased deployment plan across the customer&#8217;s 45 production lines.<\/p>\n<h3 id=\"efficiency-specs\">3.1 Efficiency specifications across the TPS portfolio<\/h3>\n<p>The TPS DIN rail power supply portfolio includes multiple efficiency tiers suited to different application requirements:<\/p>\n<div class=\"product-tabs\">\n<div class=\"tab-nav\"><button class=\"tab-btn active\" data-tab=\"tab-peak\">Peak DR+ Series<\/button><br \/><button class=\"tab-btn\" data-tab=\"tab-pro\">Pro Series<\/button><br \/><button class=\"tab-btn\" data-tab=\"tab-gp\">GP Series<\/button><\/div>\n<div id=\"tab-peak\" class=\"tab-content\">\n<h3>TPS100-320W Peak DR+ Series<\/h3>\n<p>The TPS100-320W Peak DR+ Series achieves <strong>up to 93% efficiency at 220VAC input and full load<\/strong>, with built-in over-temperature protection. Available in 100W, 150W, 240W, and 320W ratings with 12-15V and 24-28V output groups. The 170% power boost for up to 10 seconds handles inductive load start-up without triggering protection shutdown, reducing unnecessary thermal cycling of internal components.<\/p>\n<\/div>\n<div id=\"tab-pro\" class=\"tab-content\" style=\"display: none;\">\n<h3>TPS030-130W Pro Series<\/h3>\n<p>The TPS030-130W Pro Series covers 30W, 70W, 100W, and 130W output levels with <strong>up to 93% efficiency<\/strong> at full load. The compact form factor and wide operating temperature range make it suitable for space-constrained control cabinets where thermal management is critical.<\/p>\n<\/div>\n<div id=\"tab-gp\" class=\"tab-content\" style=\"display: none;\">\n<h3>TPS010-100W GP Series<\/h3>\n<p>The TPS010-100W GP Series provides <strong>up to 89% efficiency<\/strong> for general-purpose factory automation applications where the thermal load is moderate and cost efficiency is the primary concern. The GP Series is suited for open-ventilated cabinets where waste heat can dissipate naturally.<\/p>\n<\/div>\n<\/div>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-18862\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/10\/High-Efficiency-DIN-Rail-Power-Supply-Waste-Heat-Comparison-3.jpg\" alt=\"High Efficiency DIN Rail Power Supply Waste Heat Comparison Vergleich der Abw\u00e4rme bei hocheffizienten Hutschienen-Netzteilen\" width=\"1920\" height=\"1079\" \/><\/p>\n<h3 id=\"field-results\">3.2 Measured results: temperature reduction and capacitor life extension<\/h3>\n<p>TPS conducted a controlled thermal comparison on two identical production line cabinets. Cabinet A retained the existing 88% efficiency PSU; Cabinet B was equipped with a TPS Peak DR+ Series 240W unit at 93% efficiency. Both cabinets were monitored over a 30-day period during summer production.<\/p>\n<ul>\n<li><strong>Cabinet A (88% PSU)<\/strong>: Internal temperature averaged 56\u00b0C at 35\u00b0C ambient; peak internal temperature reached 61\u00b0C during maximum load periods<\/li>\n<li><strong>Cabinet B (93% PSU)<\/strong>: Internal temperature averaged 43\u00b0C at the same ambient; peak internal temperature reached 47\u00b0C<\/li>\n<li><strong>Temperature delta<\/strong>: 13\u00b0C average reduction in internal cabinet temperature<\/li>\n<\/ul>\n<p>Applying the 10\u00b0C capacitor life rule, the 13\u00b0C temperature reduction extends electrolytic capacitor service life by approximately 2.5\u00d7. For a power supply originally expected to last 4 years at the elevated temperature, the projected service life extends beyond 10 years\u2014exceeding the typical production line lifecycle.<\/p>\n<p>For related case studies on material testing and component reliability, see the <a href=\"https:\/\/tps-elektronik.com\/en\/case-studies\/quality-assurance-customer-case\/\">quality assurance customer case<\/a> and the <a href=\"https:\/\/tps-elektronik.com\/en\/metal-testing-quality-control-compliance-global-electronics\/\">metal testing and compliance guide<\/a>.<\/p>\n<p><a class=\"cta-primary\" href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">Get a PSU efficiency assessment for your cabinets \u2192<\/a><\/p>\n<\/section>\n<section id=\"customer-outcome\">\n<h2>4. Customer outcome: energy savings and reduced downtime<\/h2>\n<p>The phased deployment across 45 production lines delivered measurable results within the first year:<\/p>\n<ul>\n<li><strong>PSU failure rate<\/strong>: Reduced from 8-12% per year to zero unplanned failures in the first 12 months post-deployment<\/li>\n<li><strong>Energy cost reduction<\/strong>: 34W waste heat reduction per PSU \u00d7 45 lines \u00d7 8,760 hours\/year \u00d7 \u20ac0.15\/kWh = <strong>\u20ac2,010 annual energy savings<\/strong> directly attributable to reduced losses, plus additional savings from reduced cooling load<\/li>\n<li><strong>Downtime elimination<\/strong>: Zero production hours lost to PSU failures, compared to an average of 36 hours per year previously<\/li>\n<li><strong>Capacitor life extension<\/strong>: Projected 10+ year service life, eliminating the need for planned PSU replacement during the production line lifecycle<\/li>\n<\/ul>\n<p>This engagement reflects TPS&#8217;s broader approach to power supply integration for factory automation. The <a href=\"https:\/\/tps-elektronik.com\/en\/supply-chain-optimization-for-electronics-global-sourcing-compliance\/\">supply chain optimization resource<\/a> and the <a href=\"https:\/\/tps-elektronik.com\/en\/global-sales-partner-electronics-2026-eu-us-china\/\">global sales partner guide<\/a> document similar projects.<\/p>\n<p><a class=\"cta-primary\" href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">Start your thermal reduction project with TPS \u2192<\/a><\/p>\n<\/section>\n<section id=\"faq\">\n<h2>5. FAQ<\/h2>\n<div>\n<h3>How much can a high efficiency DIN rail power supply reduce control cabinet temperature?<\/h3>\n<div>\n<div>The temperature reduction depends on the output power and the efficiency difference. For a 480W power supply, upgrading from 88% to 94% efficiency reduces waste heat from 65W to 31W\u2014a 34W reduction that typically lowers internal cabinet temperature by 10-15\u00b0C in sealed enclosures. The exact reduction depends on cabinet surface area, thermal resistance, and ambient conditions.<\/div>\n<\/div>\n<h3>How does capacitor life relate to control cabinet temperature?<\/h3>\n<div>\n<div>Electrolytic capacitor life halves for every 10\u00b0C increase in operating temperature, as defined by the Arrhenius equation and documented in IPC-9592B. A 10-15\u00b0C reduction in cabinet temperature from a high efficiency PSU extends capacitor life by a factor of 2-2.8\u00d7. For a power supply rated at 4 years at the original temperature, the projected life extends to 10+ years.<\/div>\n<\/div>\n<h3>Can TPS provide a thermal analysis for my control cabinet before I select a power supply?<\/h3>\n<div>\n<div>Yes. TPS&#8217;s engineering team can perform a thermal analysis based on your cabinet dimensions, insulation rating, ambient conditions, and total heat load. This analysis identifies the optimal power supply efficiency tier to achieve your target internal cabinet temperature and capacitor life. Contact TPS through the <a href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">global sales partner service<\/a> for a thermal assessment.<\/div>\n<\/div>\n<h3>What efficiency level is appropriate for a sealed IP66 control cabinet?<\/h3>\n<div>\n<div>For sealed IP66 cabinets where convection cooling is not possible, the highest available efficiency tier is recommended. TPS recommends 93% or higher efficiency for sealed enclosures, as every watt of waste heat must be removed through the cabinet walls. For open-ventilated cabinets, 89-93% efficiency may be sufficient depending on the total heat load and ambient temperature.<\/div>\n<\/div>\n<h3>Does TPS support multi-site deployment of power supply upgrades?<\/h3>\n<div>\n<div>Yes. Through the <a href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">global sales partner service<\/a>, TPS supports phased deployment across multiple production sites, including US, EU, and China locations. The service covers PSU specification, thermal analysis, on-site installation support, and post-deployment monitoring.<\/div>\n<\/div>\n<\/div>\n<\/section>\n<footer style=\"background: #2d5797; padding: 30px; border-radius: 14px; margin-top: 40px;\">\n<p style=\"color: #ffffff; font-size: 16px; line-height: 1.6; margin: 0;\"><strong>Ready to cut control cabinet heat and extend capacitor life?<\/strong><br \/>Contact TPS Elektronik for high efficiency DIN rail power supply selection, thermal analysis, and multi-site deployment support\u2014from prototype evaluation to series production.<br \/><a style=\"color: #ffffff; font-weight: 600; text-decoration: underline;\" href=\"https:\/\/tps-elektronik.com\/en\/services\/global-sales-partner-for-electronics\/\">Request your power supply consultation \u2192<\/a><\/p>\n<\/footer><\/article>\n\n<style 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They lose time\u2014and budget\u2014when the DIN rail power supply inside a sealed control cabinet generates more waste heat than the cooling system can remove, causing electrolytic capacitor degradation, premature PSU failure, and unplanned production downtime.TPS Elektronik&#8217;s high\u2026 <a href=\"https:\/\/tps-elektronik.com\/en\/case-studies\/how-to-cut-control-cabinet-heat-and-extend-capacitor-life-in-factory-automation-with-tps-high-efficiency-din-rail-power-supplies\/\">Read More &raquo;<\/a><\/p>\n","protected":false},"author":9,"featured_media":18872,"template":"","class_list":["post-18763","case_studies","type-case_studies","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TPS High Efficiency Din Rail Power Supplies - TPS<\/title>\n<meta name=\"description\" content=\"High efficiency DIN rail power supplies reduce control cabinet heat and extend capacitor life in factory automation. 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