For system integrators, panel builders, and procurement teams designing factory automation control cabinets, the power supply is not just a source of 24V DC—it is a heat source that determines the thermal environment for every other component in the enclosure. A low-efficiency power supply can dissipate 20W to 30W of waste heat in a 130W system, raising internal cabinet temperatures and accelerating the aging of electrolytic capacitors throughout the panel.
The TPS130-DR24Pro, part of the TPS030-130W Pro Series of high efficiency DIN rail power supplies, is engineered to address this challenge directly. With over 93% conversion efficiency at 230VAC full load, a compact 91×90×60mm form factor, and MTBF exceeding 350,000 hours, this 24V DIN rail power supply reduces heat generation, extends capacitor life, and lowers total cost of ownership in factory automation control cabinets.
1. The Control Cabinet Heat Problem: Why Efficiency Determines Capacitor Life
Every watt of power that enters a control cabinet either does useful work or becomes heat. In a power supply, the difference between input power and output power is dissipated as heat—and that heat has consequences that extend far beyond the power supply itself.
Consider a typical factory automation control cabinet with a 130W power supply. At 85% efficiency, the power supply dissipates approximately 23W of waste heat. At 93% efficiency, the same 130W output produces only about 10W of waste heat. That 13W difference—roughly 56% less heat—has a direct impact on the internal cabinet temperature.
Why does this matter for capacitor life? Electrolytic capacitors—the components most sensitive to heat in any power supply or control panel—follow the Arrhenius equation for aging. For every 10°C increase in operating temperature, capacitor life is approximately halved. Conversely, reducing operating temperature by 10°C can double capacitor life.
A power supply operating at 93% efficiency generates less heat, which means:
- Lower internal cabinet temperature: Less waste heat means cooler air inside the enclosure
- Lower power supply internal temperature: Less heat generation inside the PSU itself means its own capacitors run cooler
- Longer life for all capacitors: Not just the PSU’s capacitors, but capacitors in PLCs, drives, HMIs, and other panel components
- More stable operation: Lower temperatures reduce thermal drift and parameter variation in sensitive analog circuits
For system integrators and panel builders, selecting high efficiency DIN rail power supplies is not just an energy-saving decision—it is a reliability decision that affects the entire control cabinet.
2. Product Overview: TPS130-DR24Pro High Efficiency DIN Rail Power Supply
The TPS130-DR24Pro is a high-performance AC-to-DC DIN rail power supply from the TPS030-130W Pro Series, designed for industrial and commercial power rail applications. It delivers 24V DC output at 5.4A with 130W continuous output power, making it an ideal choice for factory automation control cabinets, PLC systems, and industrial control equipment.
Key specifications at a glance:
- Output Voltage: 24V DC, adjustable 24–28V
- Output Current: 5.4A rated
- Output Power: 130W continuous
- Input Voltage: 90–264VAC, 47–63Hz or 120–370VDC
- Efficiency: Over 93% at 230VAC full load
- Ripple and Noise: 200mV max
- Hold-up Time: 20ms at full load and 230VAC input
- In-rush Current: 40A max at cold start
- Leakage Current: 0.2mA max at 265VAC 60Hz
- Isolation: 3KVac input-output withstand voltage for 60s
- Operating Temperature: -20°C to +50°C (derating from 50°C to 70°C)
- MTBF: Over 350,000 hours at MIL-HDBK-217F@25°C
- Dimensions: 91×90×60mm, approximately 350g
- Mounting: DIN rail TS 35/7.5 or TS 35/15 vertical mounting
For panel builders designing factory automation control cabinets, the TPS130-DR24Pro offers a combination of high efficiency, compact size, and long-term reliability that addresses the thermal challenges of modern industrial enclosures.
3. Efficiency Economics: How 93% Efficiency Reduces Heat and Operating Costs
Efficiency in a power supply is often presented as an energy-saving metric—and it is. But for control cabinet designers, the more important consequence of efficiency is thermal. Every watt of inefficiency becomes a watt of heat that must be dissipated from the enclosure.
The heat equation:
For a power supply delivering 130W of output power:
- At 85% efficiency: Input power is approximately 153W, and waste heat is approximately 23W
- At 93% efficiency: Input power is approximately 140W, and waste heat is approximately 10W
The difference—13W of reduced heat dissipation—may seem modest at first glance. But in a sealed control cabinet, 13W of continuous heat generation can raise the internal temperature by several degrees, depending on the cabinet’s thermal resistance. And that temperature increase directly affects every heat-sensitive component in the panel.
Energy cost savings:
Beyond thermal benefits, the 93% efficiency of the TPS130-DR24Pro delivers measurable energy savings. Over a year of continuous operation:
- At 85% efficiency: The power supply consumes approximately 1,340 kWh of input energy per year (153W × 8,760 hours)
- At 93% efficiency: The power supply consumes approximately 1,226 kWh per year (140W × 8,760 hours)
The difference—approximately 114 kWh per year per power supply—translates to direct energy cost savings. In a facility with dozens or hundreds of control cabinets, the aggregate savings become significant.
For procurement teams evaluating high efficiency DIN rail power supplies, the total cost of ownership calculation must include not only the purchase price but also the energy cost over the product’s lifetime and the reliability impact of reduced thermal stress on the entire control panel.
4. Extending Capacitor Life: Why Lower Temperature Means Longer Service Life
Electrolytic capacitors are the components most sensitive to heat in any power supply. Their life is governed by the Arrhenius equation, which relates chemical reaction rates to temperature. In practical terms, the rule of thumb is simple: every 10°C reduction in operating temperature doubles capacitor life.
This relationship has profound implications for control cabinet reliability. A power supply that runs cooler—because it is more efficient—not only extends the life of its own capacitors but also reduces the ambient temperature inside the cabinet, benefiting every capacitor in every component.
How efficiency affects capacitor temperature:
In a power supply, the primary sources of heat are:
- Switching losses: Heat generated during the on/off transitions of power semiconductors
- Conduction losses: Heat generated by current flowing through resistive elements
- Magnetic losses: Heat generated in transformer and inductor cores
- Capacitor ripple losses: Heat generated by AC ripple current flowing through electrolytic capacitors
A high-efficiency design minimizes all four loss mechanisms. For electrolytic capacitors, the most important factor is ripple current—the AC component of current that flows through the capacitor during operation. High ripple current causes internal heating, which accelerates electrolyte evaporation and increases ESR (equivalent series resistance).
The TPS130-DR24Pro achieves its >93% efficiency through optimized switching topology, low-loss magnetic components, and low-ESR output capacitors. The result is a power supply that generates less heat, has lower internal temperatures, and delivers longer capacitor life—both for its own capacitors and for the components it powers.
Practical impact for factory automation:
In factory automation applications where control cabinets run 24/7, the difference between a power supply with a 5-year service life and one with a 10-year service life is significant. Higher efficiency directly translates to longer service intervals, fewer replacement costs, and less unplanned downtime.
For more on TPS power supply reliability, see the TPS100-320W Peak DR+ Series with 170% Power Boost.
5. Control Cabinet Design: Installation and Airflow Best Practices
Even the most efficient power supply requires proper installation to achieve its rated performance and reliability. For panel builders and system integrators, the following installation practices maximize the benefits of high efficiency DIN rail power supplies.
Mounting orientation:
The TPS130-DR24Pro is designed for vertical mounting on standard DIN rail (TS 35/7.5 or TS 35/15). Vertical mounting orientation allows natural convection to carry heat upward and out of the power supply. The unit should be mounted so that the ventilation openings (if any) are not obstructed.
Spacing and airflow:
Recommended spacing around the power supply:
- Above and below: Minimum 50mm clearance to allow convection airflow
- Sides: Minimum 20mm clearance from adjacent components
- Front: Minimum 30mm clearance for cable routing and heat dissipation
When multiple power supplies are mounted side-by-side, additional spacing or forced airflow may be required to prevent heat accumulation.
Cable routing:
Route output cables away from the power supply to avoid obstructing convection airflow. Keep AC input cables separated from DC output cables to minimize noise coupling. Use cable ducts or ties to maintain organized routing and prevent cables from blocking ventilation paths.
Thermal management:
For control cabinets with high internal heat loads, consider:
- Filtered fan cooling: Forced airflow can reduce internal temperatures by 10°C or more
- Heat exchangers: Closed-loop cooling for sealed cabinets in dusty or humid environments
- Cabinet air conditioning: For high-power installations in hot ambient conditions
For more on installation best practices, see the DIN Rail Power Supply Installation and Wiring Guide.
6. Compliance and Certifications: Meeting EN 62368-1 and EMC Standards
Factory automation equipment must comply with a range of international standards for safety, EMC, and environmental performance. The TPS130-DR24Pro is designed and certified to meet these requirements.
Safety certifications:
- IEC/EN 62368-1: Safety standard for audio/video, information, and communication technology equipment
- IEC/ES/CSA/EN 60601-1: Medical electrical equipment safety standard, enabling use in medical building automation
- EN 61347-2-13: LED safety certification for lighting applications
- Low Voltage Directive 2014/35/EU: European safety directive for electrical equipment
EMC compliance:
- EN 55032-A: EMC emissions standard for multimedia equipment
- EMC Directive 2014/30/EU: European EMC directive
- EN 61000-3-2 and EN 61000-3-3: Power factor and harmonic standards
Environmental and quality:
- CE and RoHS compliant: European conformity and hazardous substance restrictions
- IP30 double insulation: Protection against solid objects and basic insulation coordination
- 3KVac input-output withstand voltage: Reinforced isolation for safety
- 5-year manufacturer warranty: Backed by TPS quality commitment
For panel builders and procurement teams, these certifications simplify the compliance process and provide documentation for panel certification. The TPS130-DR24Pro is a reliable alternative to Mean Well power supply models in the same power class, with comparable or superior specifications.
7. Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Model | TPS130-DR24Pro |
| Output Voltage | 24V DC, adjustable 24–28V |
| Output Current | 5.4A |
| Output Power | 130W continuous |
| Input Voltage | 90–264VAC, 47–63Hz / 120–370VDC |
| Efficiency | >93% at 230VAC full load |
| Ripple & Noise | 200mV max |
| Hold-up Time | 20ms at full load / 230VAC |
| In-rush Current | 40A max at cold start |
| Leakage Current | 0.2mA max at 265VAC 60Hz |
| Isolation | 3KVac input-output for 60s |
| Protection | OVP, OCP (>110%), OTP, auto-recover |
| Operating Temperature | -20°C to +50°C, derating 50°C–70°C |
| MTBF | >350,000 hours at 25°C |
| Dimensions | 91×90×60mm |
| Weight | Approx. 350g |
| Mounting | DIN rail TS 35/7.5 or TS 35/15 |
| Certifications | CE, RoHS, EN61347-2-13, EN55032-A, IEC/EN60601-1, 62368-1, LVD/EMC |
| Warranty | 5 years |
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