MIL-Spec 400Hz AC Cooling Fans & Shipboard Blowers
Overheat-protected AC fans for military 400Hz power architectures on ground, ship, and airborne platforms.
Perseus 400Hz AC fans are built for military power buses, not adapted from 50/60Hz commercial designs — where resonance and bearing failures appear once the fan is forced onto an aircraft or shipboard supply. The Titan series combines a hardware thermal cut-out with -55°C to +85°C operation and a Ø76.2mm envelope.
Overheat-protected AC fans for military 400Hz power architectures on ground, ship, and airborne platforms.
Perseus 400Hz AC fans are built for military power buses, not adapted from 50/60Hz commercial designs — where resonance and bearing failures appear once the fan is forced onto an aircraft or shipboard supply. The Titan series combines a hardware thermal cut-out with -55°C to +85°C operation and a Ø76.2mm envelope.
Core Technical Features
Hardware-Level Overheat Protection:
A thermal cut-out removes motor power when winding temperature exceeds its threshold. It is a hardware function of the fan, not a controller setting, so it stays active regardless of system configuration.
Built for Military AC Power:
Available in 115V / 208V AC at 400Hz and 450Hz, matching naval, airborne, and vehicle generator power buses. Performance stays stable across generator load changes and power transfer switching.
Maritime & Ground Hardening:
Qualification planning references 96-hour neutral and 192-hour acidic salt spray (Method 509.7), 95%±5% RH humidity (Method 507.6), and fine particulate dust (Method 510.7). Material and finish choices follow the platform environment.
MIL-STD-810H Qualification Planning:
References 40g mechanical shock (Method 516.8, 11ms, three-axis) and vibration endurance (Method 514.8). Operating range is -55°C to +85°C, with aircraft vibration validation for high-frequency excitation profiles.
Typical Applications
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![Ground Mobile Command & Control Shelters]()
Forward shelters run on vehicle- or trailer-mounted 400Hz generators. The Titan series holds electronics operating temperature from arctic cold to +85°C desert heat, without external HVAC.
Ground Mobile Command & Control Shelters
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![Shipboard Cabin and Compartment Ventilation]()
Naval compartments combine salt fog, humidity, continuous propulsion vibration, and 400Hz ship's power. The 96-hour salt spray profile targets the primary failure modes in that environment.
Shipboard Cabin and Compartment Ventilation
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![Fixed and Mobile Radar Base Station Cooling]()
Radar base stations need continuous ventilation for transmitters and signal processing, where a cooling interruption directly affects detection capability.
Fixed and Mobile Radar Base Station Cooling
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![Military Communication Hubs and Facility Rooms]()
Communications rooms concentrate continuous heat loads across many racks. The hardware thermal cut-out adds a layer of thermal safety where a cooling failure would disrupt an entire operating area.
Military Communication Hubs and Facility Rooms
Series Selection Guide
Titan covers the full 400 Hz AC range from 25 mm to 254 mm — selection is by airflow, supply voltage and mounting envelope rather than frame size.
| Series | Frame Size | Max Airflow (CFM) | Power Range (W) |
|---|---|---|---|
| Titan | 25–254 mm | 252.00 | 12.50–187 |
Compare Models
Narrow by frame size and supply voltage, then click any model to open its full technical page.
| Model | Frame | Airflow CFM | Static pres. mmH2O | Voltage | Noise dB(A) |
|---|
All 400Hz AC Fan Models
5 models
- Titan PCG24JFZY222-26G-AA 25.4 mm x 25.4 mm x 25.4 mm 26 V AC 5.1 CFM
- Titan PCG67JFZY722-63G-AA Dia. 76.2 mm x 65.5 mm 200 V line / 115 V phase AC 140 CFM
- Titan PCG112JFZY77-38G-AA 119 mm x 119 mm x 38 mm 200 V line / 115 V phase AC 252 CFM
- Titan PCG146178-C 152.4 mm x 152.4 mm x 177.8 mm 208 V AC 90 CFM
- Titan PCG252JZZL83-154G-AA Dia. 252 mm x 154 mm 230 V AC 117 CFM
Model Reference
Below are representative models — one per series — illustrating key performance parameters and environmental adaptabilities. Each PQ curve shows measured static pressure vs. airflow at rated voltage.
Core Electrical & Performance Parameters
| Parameter | Specification |
|---|---|
| Rated Voltage | 230V AC |
| Rated Frequency | 50/60Hz |
| Voltage Range | 200-250V AC |
| Rated Rotational Speed | 3,390 RPM |
| Max Airflow | 1,117 CFM |
| Max Static Pressure | 71.4 mmH2O |
| Acoustic Noise | 87 dB(A) |
| Speed Control Mode | PWM/VC |
Mechanical & Environmental Parameters
| Parameter | Specification |
|---|---|
| Frame Size | Dia. 252mm x 154mm |
| Protection Rating | IP67 configuration option |
| Operating Temperature Range | -40°C to +80°C |
P-Q Curve — PCG252JZZL83-154G-AA @ 230V AC, 50/60Hz
At nominal input conditions, this reference curve maps static pressure from 0-89.9 mmH2O against airflow from 0-1300.1 CFM. Use it for first-pass operating-point review; full-resolution P-Q curves, CAD files, and product-specific datasheets are available for qualified RFQ review.
400Hz AC Cooling Fans for Aerospace Avionics
Perseus 400Hz AC cooling fans are purpose-built for aerospace and defense avionics systems operating on standard aircraft power networks. These AC fans deliver reliable cooling for airborne electronics bays, in-flight entertainment systems, avionics racks, flight control computers, and mission equipment where 115VAC 400Hz power is the standard electrical supply.
AC fan configurations support environmental qualification to DO-160 and MIL-STD-810H standards for vibration, shock, altitude, temperature cycling, and humidity. Operating temperature ranges from -55°C to +85°C, with altitude operation up to 50,000 ft. Fan selection should account for airflow requirements at operating point, acoustic limits, starting current at low temperature, and available mounting envelope.
400Hz AC fans are specified when the aircraft or platform provides 115VAC 400Hz power directly, eliminating the need for AC-to-DC conversion. This reduces power supply complexity and improves reliability in airborne cooling applications where 28VDC conversion would add unnecessary weight and failure points.
At high altitudes, reduced air density decreases both the cooling capability per CFM and the fan's pressure performance. Airflow requirements should be calculated using density-corrected values to ensure adequate cooling at maximum operating altitude, not just at sea level conditions.
Engineering Resources
Technical guides to support your fan selection and system integration.
400Hz AC Fan Application Notes
Technical guidance on 400Hz AC fan selection for aerospace and defense applications.
AC Fan Performance Testing
Understanding performance testing standards for AC cooling fans in military environments.
Avionics Cooling System Design
Design considerations for 400Hz avionics cooling systems including airflow and thermal management.
Technical Insights
Engineering insights on thermal management, fan selection, and defense electronics cooling.