Manufacturer: Aitech

The Aitech P233 is a versatile and reliable VITA 62 compliant 3U power supply designed for harsh environment applications, with a wide input voltage range and a total power output capacity of up to 600 W.

An optional sharing mechanism, per VITA 62, enables two P233 power supplies to be operated in parallel in order to provide redundant operation (ORing) or to provide a maximum power output of up to 1200 W.

Input to output isolation eliminates any possibility of ground loops, and the main output supplies (+3.3 V, +5 V, and +12 V) have remote sense lines to ensure voltage stability for high current loads. The P233 also includes numerous protection mechanisms both for input power and for output power supplies.

EMI/RFI protections include the P233 heatsink, which provides enhanced EMI/RFI shielding of on-board components, and the on-board second stage EMI/RFI filter for input power (designed to be used along with a system-level first stage filter).

On-board logic, control functions, are user-defined pins are managed by an FPGA that can be field customized (contact an Aitech representative for more information).

An optional capacitor bank provides hold-up time to enable orderly system shutdown in the event of power failure. The capacitor bank also includes a backup battery to provide VBAT per VITA 62, in order to power a system real-time clock when the system is powered off.


InputUp to 500 W: 18 – 32 Vdc continuous
500 - 600 W: 22 – 32 Vdc continuous, 18 V for 3 seconds
Turn-on Threshold: Input 18 Vdc minimum
Overvoltage Protection: Up to 60 Vdc (100 ms)
Reverse Polarity Protection: Up to 50 Vdc
Output(s)Total Combined Output: Capacity 600W
Maximum power of 600 W available only when all power is delivered from +12 V output
• 12V: 50A
• +5V: 40A
• +3.3V: 30A
• +3.3V_AUX: 4A
• +12V_AUX: 1A
• -12V_AUX: 1A
Efficiency88% efficiency (depending on load and distribution)
Isolation>10 MOhm at 100 V Input to Chassis
>10 MOhm at 50 V Output to Chassis
>10 MOhm at 500 V Input to Output
OtherSix output voltages
Power monitor
Independent current limiting for each output
Over-temperature protection
Intelligent Platform Management Interface provides voltage and board temperature measurements
BIT monitors output voltages and provides test status via the front panel indicator LED and FAIL# output signal
Transient Suppression: Per MIL-STD-704D/E and MIL-STD-1275


ElectricalSee above
MechanicalWithout Hold-up Capacitor Bank: 3U per VITA 62 with standard 1” Conduction cooled form factor
With Hold-up Capacitor Bank: 3U per VITA 62 with standard 2” Conduction cooled form factor
Two-Level Maintenance (2LM)
Conformal CoatingAs standard (Acrylic but Urethane option)
TemperatureTemperature range Rugged (operation): -40 to +70°C
Temperature range Rugged (storage): -50 to +100°C
Temperature range Military (operation): -40 to +85°C
Temperature range Military (storage): -55 to +125°C
Operation down to -55C operating is a factory option. Temperature related to card edge
Humidity0 - 95% with Acrylic (Standard)
0 - 100% with Urethane (Optional)
WeightWithout Hold-up Capacitor Bank: <875 g (1.93 lbs)
With Hold-up Capacitor Bank: <1200 g (2.65 lbs)
AltitudeRugged: 35,000 ft.
Military: 60,000 ft.
VibrationSpecs per VITA 47 V3
ShockSpecs per VITA 47 OS2
Warranty1 Year
Recab UK
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