July 2, 2026
Cooling small electronic systems is never just about moving air. In compact power supplies, embedded systems, medical equipment, inverters and industrial controllers, the fan has to do several things at the same time. It must deliver enough airflow, handle system resistance, stay reliable over time, fit into a very limited space and preferably not sound like a small turbine in panic mode.
That is exactly where the new SANYO DENKI San Ace 40 9RA type DC fan series becomes interesting.
SANYO DENKI has introduced new San Ace 40 9RA type DC fans in 40 × 40 × 20 mm and 40 × 40 × 28 mm sizes. The series is designed for efficient, low-noise cooling in high-density electronic equipment, where thermal performance, acoustic behaviour and power consumption all matter.
As electronic designs become more compact, thermal design becomes less forgiving. More processing power, higher switching frequencies, denser PCBs and smaller enclosures all push heat into a tighter mechanical envelope. A heatsink alone is not always enough, especially when airflow inside the enclosure is limited or when components are placed close together.
A 40 mm fan may look like a small component, but in the thermal architecture it can be a critical design choice. The wrong fan can create too much noise, consume unnecessary power, or fail to provide enough static pressure when mounted behind filters, vents, heatsinks or narrow air paths.
The new San Ace 40 9RA series focuses on that balance: low noise, reduced power consumption and practical cooling performance in a compact form factor.
According to SANYO DENKI, the noise level of the 40 × 40 × 20 mm San Ace 40 9RA type DC fan has been reduced by up to 7 dB(A) compared with the previous 40 × 40 × 20 mm San Ace 40 9P type model.
That is not just a nice number for the datasheet. In real applications, lower fan noise can make a real difference. Think about medical devices, test equipment, control cabinets, desktop instruments, embedded computing systems or electronics that operate close to people.
For engineers, this is useful when the system still needs forced-air cooling, but acoustic performance has become part of the design requirements. Nobody wants a compact controller that sounds more enthusiastic than the machine it controls.
The San Ace 40 9RA series also reduces power consumption by about 56% compared with the current model. This can be important in systems where every watt matters, especially in compact equipment with limited power budgets or where thermal losses inside the enclosure must be minimized.
Lower fan power consumption can contribute to:
Reduced total system power demand
Lower internal heat generation
Improved energy efficiency
Easier thermal management
Better suitability for always-on equipment
More design margin in compact systems
This makes the fan relevant not only for thermal engineers, but also for engineers working on power architecture, enclosure design and long-term system reliability.
Despite its small size, the 40 × 40 × 20 mm high-speed versions deliver up to 0.22 m³/min, or 7.7 CFM, airflow and up to 78 Pa static pressure. This makes the series suitable for applications where space is limited but airflow still has to pass through real mechanical restrictions, not just a perfectly open lab setup.
The 9RA0424H6001, available via TOP-electronics, is a 24 Vdc model with:
40 × 40 × 20 mm dimensions
24 Vdc rated voltage
12 to 27.6 Vdc operating voltage range
0.22 m³/min maximum airflow
78 Pa static pressure
26 dB(A) noise level
Pulse sensor
Ribbed frame
MPQ of 30 pieces
These specifications make it a practical option for compact 24 Vdc industrial and embedded applications where low noise and efficient cooling are both relevant design parameters.
The San Ace 40 9RA series is suitable for dense electronic systems where component temperature, enclosure airflow and long-term stability must be considered early in the design process.
Typical application areas include:
Power supply units
Inverters
Medical equipment
Industrial controllers
Embedded computing systems
Compact automation equipment
Communication modules
Test and measurement equipment
Small enclosures with forced-air cooling
High-density electronics with limited airflow paths
In these applications, the fan is not just an accessory. It is part of the reliability strategy. Temperature affects component lifetime, performance stability and system behaviour. A well-selected fan can help reduce thermal stress and improve operating margin.
The San Ace 40 9RA series includes protection functions such as locked-rotor burnout prevention and reverse-polarity protection. These features are especially useful in industrial and embedded systems where reliability and protection against installation or operating faults matter.
The expected life is 60,000 hours at 60°C, based on L10 life under rated operating conditions. For engineers, that gives a useful reference point when evaluating fan lifetime in relation to enclosure temperature, duty cycle and service expectations.
SANYO DENKI also highlights the environmental aspect of the new series. The San Ace 40 9RA type DC fans are made with lead-free brass, comply with the RoHS Directive and are certified as an Eco Product.
For many engineering teams, environmental compliance is no longer something that can be checked at the end of the project. It is part of component selection from the start, especially for products sold into European and global markets.
The San Ace 40 9RA series includes models for different supply architectures, including:
5 Vdc versions
12 Vdc versions
24 Vdc versions
This gives engineers flexibility when selecting a fan that matches the available system rail, whether the design is built around embedded electronics, industrial 24 Vdc supply architecture or lower-voltage compact systems.
Key part numbers include:
9RA0405H6001
9RA0412H6001
9RA0424H6001
The 9RA0424H6001 is currently highlighted in the newsletter of July as a 40 × 40 × 20 mm, 24 Vdc low-noise DC fan.
Selecting a cooling fan is not only about matching dimensions and voltage. The final choice depends on airflow requirements, static pressure, system impedance, acoustic limits, operating temperature, lifetime expectations and available space inside the enclosure.
TOP-electronics can support engineers with:
Product selection
Technical design-in support
Samples for evaluation
Alternative sourcing options
Logistics and supply chain support
Support for compact cooling and thermal management designs
The new SANYO DENKI San Ace 40 9RA type DC fans are a strong option for engineers who need reliable forced-air cooling in compact electronics without unnecessary noise or power consumption.
Explore the 9RA0424H6001 40 × 40 × 20 mm 24 Vdc low-noise DC fan on the TOP-electronics website, or contact our team to discuss the right cooling solution for your application.
Productinformation of the San Ace 40 9RA type DC fans
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