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Diamond Point International

Tri-M TPSi1085 - 85W Rugged Isolated PC/104 Power Supply

3.3V and 5V Outputs, -40 to +85 Operation


Tri-M's TPSi1085 is an isolated PC/104-Plus embedded power supply offering 2250V input/output isolation, 6000W transient protection, active input voltage clamping, wide input ranges of +9V to +33V DC, and maximum efficiency 88%. This rugged design operates in an extended temperature range from -40°C to +85°C (-40°F to +185°F), and features quick-disconnect terminal socket plugs for simple installation.

Galvanically isolated and short circuit protected, the TPSi1075 offers two standard outputs of +3.3V @ 8A and +5V @17A with total combined power of 85W. This isolated power solution also provides remote shutdown functionality, power failure signaling and three dual colour LED status indicators. For PC/104-Plus connectivity, there are also 8bit, 16bit, and PCI headers with passthrough/non-passthrough bus versions available.

For applications requiring a clean isolated power, the TPSi1085 is the perfect solution. This high density, small form factor, and unprecedented SWaP (size, weight, and performance) board is the perfect design for military, aerospace, transportation, and industrial applications.


  • High efficiency
  • Extended temperature operation
  • Rugged design
  • High voltage isolation
  • Transient supression
  • Clean and filtered power for the PC/104 bus
  • Power/OS


Power Supply

Input+9V to +33V DC
Output(s)+3.3V Output: 8A Max.
+5V Output: 17A Max.
Maximum Combined Power: 85W Total

Transient Supression 6000W Total
Output Ripple/Noise** Typ 20mV, max 75mV
Line Regulation** ±0.05% Max.
Load Regulation** ±0.06% Max.
Switching Frequency 267kHz (5V), 1.01mHz (3.3V)
Current Limiting Fuse Onboard 15A (on input source)
Quiescent current 22mA (LEDs & Outputs Off)
EfficiencyMaximum 88%
IsolationIsolation Voltage 2250V Max.
OtherThermal Protection/Shutdown +120°C (248°F)


ExpansionStandard 16 bit PC/104 interface (stack through headers are installed)
Standard 32 bit PCI-104 interface (stack through headers are installed)
'Non stack-through' option. 'No connector' option. See ordering details.
Electrical9V to 33V DC - see above for more details
MechanicalDimensions: 90 × 96 × 11mm (3.55 × 3.775 × 0.43"), standard PC/104 sized
Conformal CoatingOn request
TemperatureTemperature range (operation): -40°C to +85°C
Temperature range (storage): -40°C to +85°C
Weight110g (3.9oz) no plugs, 117g (4.1oz) with plugs
Warranty1 Year

Ordering Details

PC/104+, Isolated, In 9-33VDC, Out 85 Watt, +3.3V@8A, +5V@17A, (-40 to +85°C), ISA Bus, PCI Bus

PC/104+, Isolated, In 9-33VDC, Out 85 Watt, +3.3V@8A, +5V@17A, (-40 to +85°C), No ISA Bus, No PCI Bus
-CH Add suffix for Humiseal conformal coating and epoxy (factory installed)
-CS Add suffix for Silicon conformal coating and epoxy (factory installed)
-CU Add suffix for Urethane conformal coating and epoxy (factory installed)
-NS Non-Stack Through Bus, modifies N (factory installed)