Technical Specifications

450W
Model 638HS
Isolated Sealed DC-DC Converter
Design Features
- Wide Range Input Voltage
- High Efficiency Design
- Hi Ingress Rating, IP 676
- Adjustable Output Voltage
- Optional Remote Output Voltage Sensing
- Optional Remote On/Off switching
- Low Voltage cutout
- High Voltage cutout
- Electronically Current Limited
- Thermally Protected
- Low No Load Power Consumption
- I/O Bayonet Quick Connection
MODEL NO.
638 HS
NOMINAL INPUT VOLTAGE RANGE 12 VDC to 28 VDC
MAXIMUM INPUT VOLTAGE RANGE 10.5 to 32.0 (+,- 0.5) VDC
INPUT CURRENT AT 10A OUTPUT CURRENT 34A @ 11.5 Vin; 36.1 Vout
INPUT CURRENT AT NO LOAD <150 mA over entire input/output voltage ranges
OUTPUT VOLTAGE NOMINAL 36.0 VDC (factory adjusted)
OUTPUT VOLTAGE ADJUSTMENT RANGE 32.0 VDC to 42.0 VDC (internally accessible to user)
250 mV (without remote sensing)
50 mV (with remote sensing)
OUTPUT VOLTAGE REGULATION <2%
OUTPUT RIPPLE 50 mV RMS at maximum load (measured at 25C)
MAXIMUM CONTINUOUS OUTPUT POWER 450 W
POWER SURGE 550 W
MAXIMUM LOAD CURRENT 10 ADC, for output voltage setting 32.0 VDC - 42.0 VDC
EFFICIENCY Not less than 90% over 10% to 100% load range
LOW INPUT VOLTAGE SHUTDOWN < 10.5 +/-0.3 VDC
HIGH INPUT VOLTAGE SHUTDOWN > 32.0 +/- 1.0 VDC
Set to shut off at 110% of maximum current
with continuous automatic retry
OVER TEMPERATURE SHUTDOWN Via internal thermostat, self resetting
COOLING By Conduction through base plate and convection
FUSING Customer accessible
Via pin to -ve on input connector,
may be disabled via internal jumper
Via 2 pins on the output connector
usage is optional
OPERATING TEMPERATURE RANGE -40C to 70C, 100% loading
OPERATING HUMIDITY 100%
INGRESS RATING IP 676
MOUNTING SLOT CENTERS (in./cm.) 6.0 x 7.3 / 15.2 x 18.5
DIMENSIONS, (in./cm.) (L x W x H) 9.5 x 8.0 x 2.9 / 24.1 x 20.3 x 7.4
HOUSING MATERIAL All Aluminum
WEIGHT (lb./kg.) 7.0 / 3.2
NOTE: Specifications are subject to change without notice.
Rev 7/15/2019
Via 9 pin Bayonet connectorINPUT/ OUTPUT CONNECTION
GENERAL
OVERLOAD SHUTDOWN
INPUT
CONNECTIONS
OUTPUT LOAD REGULATION
REMOTE SENSE
REMOTE TURN ON
PROTECTION
OUTPUT
SEC America Corp.
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